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Assessing neotectonic deformation and terrain evolution through geospatial morphometric techniques across the MBT zone,NW Himalaya 认领 引用
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作者 CHANGMAI Jayshree PATIDAR Atul Kumar KOTHYARI Girish Ch 《Journal of Mountain Science》 SCIE CSCD 2026年第3期1079-1104,共26页
The transitional zone between the Sub-Himalaya and the Lesser Himalaya is delineated by the Main Boundary Thrust(MBT)to the north and the Himalayan Frontal Thrust(HFT)to the south.The MBT acts as a major topographic b... The transitional zone between the Sub-Himalaya and the Lesser Himalaya is delineated by the Main Boundary Thrust(MBT)to the north and the Himalayan Frontal Thrust(HFT)to the south.The MBT acts as a major topographic barrier that exerts significant control over longitudinal river valleys and sediment dispersal patterns.This region exhibits pronounced fluvial responses shaped by the interplay of tectonic activity and climatic processes.The present study addresses the need for detailed micro-scale morphometric analysis in this zone to better understand ongoing landscape deformation and neotectonic signatures.A multidisciplinary approach integrating geospatial morphometric techniques with field-based evidence has been employed to investigate terrain evolution.Quantitative morphometric assessments were conducted for 16 sub-basins within an active segment of the MBT,bounded by the Jakhan River to the east and the Giri River to the west.Dimensional changes driven by tectonic uplift and accelerated erosion/incision were evaluated using the hypsometric integral(HI),with most values falling below 0.50,indicating that the drainage basins are in an equilibrium stage.Basin shape(Bs)values range from 0.88 to 6.79,supporting the occurrence of accelerated erosional processes.The stream length gradient index(SL)exhibits values between 86 and 816,suggesting rapid uplift and incision.Similarly,computed values of the Chi(χ)coefficient(479-3706)and the steepness index(Ksn;63-214)reflect differential erosion and strong tectonic control on drainage network evolution.The spatial distribution of tectonic deformation was statistically evaluated using a correlation matrix based on the Relative Index of Active Tectonics(RIAT).The results reveal that approximately 50.33%and 16.25%of the study area fall into high and moderate activity zones,respectively,which is corroborated by historical earthquake records and geomorphic evidence.Neotectonic signatures are preserved in the landscape as river terraces,displaced or tilted strata,V-shaped valleys,river offsets,knickpoints,hanging valleys,and channel migration along the strike of the MBT.These findings underscore the significant role of neotectonics in landform evolution and offer valuable insights for geohazard assessment and mitigation strategies in the rapidly developing foothill regions of the Himalaya. 展开更多
关键词 Neotectonics Morphometric analysis Main Boundary Thrust Fluvial response,Relative Index of Active Tectonics(RIAT) Landscape evolution Himalaya
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Process-based hydro-morphometric controls on runoff,erosion,and groundwater recharge in an ungauged tropical crystalline river basin:The Dayi River,Ghana 认领 引用
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作者 Bismark Mensah-Brako 《River》 EI CSCD 2026年第2期295-319,共25页
This study quantifies and interprets the hydro-morphometric characteristics of the Dayi River Basin to evaluate process-based controls on runoff generation,erosion susceptibility,and groundwater recharge in an ungauge... This study quantifies and interprets the hydro-morphometric characteristics of the Dayi River Basin to evaluate process-based controls on runoff generation,erosion susceptibility,and groundwater recharge in an ungauged tropical crystalline river system in Ghana.Using a 30m resolution ASTER Digital Elevation Model(ASTER DEM),hydro-morphometric parameters encompassing linear,areal,and relief characteristics were derived.The results revealed an elongated basin with a dendritic drainage pattern,as indicated by a low elongation ratio(0.46),form factor(0.17),and circularity ratio(0.26).The basin further exhibited low drainage density(0.79 km km−2),coarse drainage texture(0.32),long length of overland flow(0.63 km),and high infiltration potential,collectively reflecting a structurally controlled hydro-geomorphic river system with enhanced groundwater recharge.These characteristics regulate runoff distribution,erosion,and groundwater recharge within a dual-aquifer system,enhancing the basin′s hydrogeomorphic resilience.The basin-scale hydrological storage coefficient(1.6)indicates a high storage potential,resulting in attenuated runoff peaks,reduced flow erosivity,and enhanced groundwater recharge through subsurface percolation.Such a storage-dominated hydrological response indicates that a substantial proportion of rainfall is partitioned into infiltration and subsurface storage,resulting in enhanced groundwater recharge,sustained baseflow contributions,and reduced flash-flood potential in ungauged tropical crystalline river basins.Watersheds such as Tsatsadu,Tafi,Tsibu,and Tsidje exhibit higher infiltration and reduced erosion,indicating suitability for inland valley rice cultivation,whereas Ahava,Aflabo,Hava,and Koloe show elevated runoff,shorter overland flow,and increased flood and erosion risk.Targeted interventions,including check dams,terraces,afforestation,and sustainable cropping systems,are recommended to mitigate hydrological hazards.By linking DEM-derived morphometric indices with dual aquifer characteristics,this study provides a transferable framework for watershed assessment and sustainable water management in datascarce tropical dual aquifer basins,with applicability to Sub-Saharan Africa,South Asia,and other tropical regions.The findings contribute to global efforts toward sustainable water management and climate resilience(SDGs 6 and 13),with implications for agricultural water security(SDG 2)in data-scarce tropical basins. 展开更多
关键词 Dayi River basin erosion groundwater recharge hydro‐morphometric characteristics runoff
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Sub-Watershed Prioritization of Chambal River Basin Using Morphometric and Topo-Hydrological Parameters 认领 引用
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作者 Teja Ram Nitharwal Vipin Chandra Lal +4 位作者 Arun Pratap Mishra Kaushalendra Kumar Karvendu Rashmi Singh Geeta Kumari Ashvini Kumar 《Journal of Environmental & Earth Sciences》 CAS 2025年第5期117-129,共13页
Natural resource management is essential to sustain human well-being and the environment.Water and soil are two of the most important natural resources that require careful management.The western part of India faces m... Natural resource management is essential to sustain human well-being and the environment.Water and soil are two of the most important natural resources that require careful management.The western part of India faces multiple challenges,including climatic variability,soil degradation,water scarcity,deforestation,etc.The basin’s sub-watersheds are delineated and prioritised using the Soil and Water Assessment Tool(SWAT)and Sub Watershed Prioritization Tool(SWPT),respectively,using morphometric and topo-hydrological characteristics,and the sub-watersheds are further ranked using Weighted Sum Analysis(WSA).The findings indicate that SWS19,SWS18,SWS1,SWS17,SWS16,and SWS15,which are drained by the rivers Chambal,Kali Sindh,Mashi,Parbati,Parwan,and Beradi,are highly vulnerable sub-watersheds.By integrating remote sensing,GIS techniques,and quantitative morphometric analysis,parameters such as drainage density,stream frequency,bifurcation ratio,and slope gradient were evaluated.The analysis revealed critical sub-watersheds characterized by steep slopes,high drainage density,and poor vegetation cover,indicating their susceptibility to erosion and runoff.The findings underscore the necessity for targeted soil conservation measures,such as contour bunding,afforestation,and water retention structures.This study highlights the utility of geospatial tools for sustainable watershed management and provides a replicable framework for prioritizing sub-watersheds in similar regions. 展开更多
关键词 Morphometric Analysis Topo-Hydrology Sub-Watershed Prioritization Tool(SWPT) Natural Resource Management Soil and Water Weighted Sum Analysis(WSA) Chambal River Basin
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Prioritization of erosion prone sub-watersheds using morphometric analysis and RUSLE-based approaches:A case of Hare Watershed,Abaya Chamo Sub-basin,Ethiopia 认领 引用
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作者 Tegegn Takele MANA Samuel Dagalo HATIYE 《Journal of Mountain Science》 SCIE CSCD 2025年第2期537-555,共19页
Soil erosion in the Hare watershed led to significant land degradation,water pollution,and reduced agricultural productivity.Despite its effects,very few researchers have used combined morphometric and RUSLE model tec... Soil erosion in the Hare watershed led to significant land degradation,water pollution,and reduced agricultural productivity.Despite its effects,very few researchers have used combined morphometric and RUSLE model techniques to quantify soil erosion and thereby prioritize impacted areas.This work used an automated GIS-based tool(SWPT)to prioritize crucial areas based on topohydrological and morphometric factors and predict soil loss in sub-watersheds using the RUSLE model.Land use/cover data were obtained from Landsat imagery,while slope and morphometric information were extracted from digital elevation data with a resolution of 12.5 m.Soil erodibility was determined using Ethiopian soil maps,and rainfall erosivity was computed using meteorological data.An average annual soil loss of 49 t ha-1 yr-1 was observed in the Hare watershed.Sub-watershed 11 was found to be the most affected,with an average annual soil loss of 85.12 t ha-1 yr-1and a compound parameter value(CPV)of 0.059.Subwatershed 17 has the least amount of soil loss,with 3.67t ha-1 yr-1 and a CPV of 1.32.The study emphasizes the usefulness of integrating RUSLE and morphometric analysis for soil and water conservation planning,suggesting a variety of modeling tools in data-sparse locations to quantify and prioritize erosion-prone areas. 展开更多
关键词 Erosion prioritization GIS-based tool(SWPT) Hare watershed Land degradation Morphometric analysis RUSLE model
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Morphometric constraints on tectonic activity and landscape evolution in the Uludağ Range,NW Türkiye 认领 引用
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作者 Taylan SANÇAR Volkan KARABACAK 《Journal of Mountain Science》 SCIE CSCD 2025年第12期4408-4428,I0058-I0078,共21页
The Uludağ Range of northwest Türkiye forms a key tectonic boundary between the North Anatolian Fault Zone and the Western Anatolia Extensional Region, where active deformation is expressed across a network of st... The Uludağ Range of northwest Türkiye forms a key tectonic boundary between the North Anatolian Fault Zone and the Western Anatolia Extensional Region, where active deformation is expressed across a network of strike-slip and normal faults. To investigate how fault segmentation and kinematics control landscape evolution in this complex orogen, we integrate high-resolution morphometric analysis with paleoseismological data. We extracted key morphometric indices-including Δ-relief, Δ-elevation, Δ-gradient, Δχ, hypsometric integral, channel concavity(m), normalized channel steepness(ksn), and knickpoint distribution-from 10-meter DEMs using open-source geomorphic toolkits. Our results demonstrate pronounced spatial variability in geomorphic signatures and tectonic activity across four divide segments(DS). DS01, associated with the right-lateral Ulubat Fault, exhibits exceptional morphometric stability and minimal disequilibrium, in line with long earthquake recurrence intervals and low Holocene slip rates. In contrast, DS02 and DS03-bounded by the Bursa and Soğukpınar faults-display χ-based divide migration and subtle landscape adjustment. DS04, influenced by the İnegöl and Oylat faults, is characterized by elevated channel steepness, dense knickpoint clustering, and southward divide migration, collectively indicating ongoing uplift and transient drainage adjustment. The strong correspondence between morphometric disequilibrium and documented earthquake recurrence patterns highlights the critical value of integrating geomorphic and paleoseismological datasets. Our findings demonstrate that only through the convergence and cross-validation of multiple independent metrics can the segmented imprint of active deformation be reliably detected-particularly where landscape response is temporally offset from fault activity. The methodological framework developed here provides a robust template for quantifying active structures and their geomorphic consequences and can be widely applied to other tectonically complex mountain belts for seismic hazard assessment and landscape evolution studies. 展开更多
关键词 Active faults Morphometric indices North Anatolian Fault Western Anatolia UludağRange
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Diversity and Morphometrics of Palm Weevils of the Genus Rhynchophorus in Maniema Province, Democratic Republic of Congo 认领 引用
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作者 Angundji Yumbi Chérif Muhigwa Bahananga Jean-Berckmans +2 位作者 Manga Tshomba Joseph Dieudonné Cikwanine Murhabale Cisirika Bertin 《Advances in Entomology》 2025年第1期152-173,共22页
An inventory of Rhynchophorus species was carried out to determine their diversity, biogeographical variability and morphometrics. A shotgun trapping method was used at nine sites in three districts over a four-month ... An inventory of Rhynchophorus species was carried out to determine their diversity, biogeographical variability and morphometrics. A shotgun trapping method was used at nine sites in three districts over a four-month period, identifying three species: R. quadrangulus, R. phoenicis, R. ferrugineus and a probable variant of R. phoenicis. Of these species, R. phoenicis stands out as the most widespread palm weevil, while the probable variant of R. phoenicis is considered the rarest subspecies in the Maniema region. The color of the head and elytra is a criterion for distinguishing the different species of Rhynchophorus spp. Morphological criteria indicate that the probable subspecies of R. phoenicis is the largest palm weevil in the Maniema region and even globally. It is followed by R. quadrangulus and, by far, by R. phoenicis. The smallest palm weevil in Maniema is R. ferrugineus. Moreover, these criteria reveal that, for all three species identified, the female is generally larger than the male. This study has the merit of extending the distribution of R. ferrugineus from the Maghreb to the central East of the DRC, and highlighting a subspecies of R. phoenicis. Recognition of the sexes on the basis of the shape of the tip of the abdomen (oval in the male and flat in the female) is an additional contribution. 展开更多
关键词 Inventory Diversity Morphometrics Palm Weevils
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Intraspecific leaf morphological variation in Quercus dentata Thunb.:a comparison of traditional and geometric morphometric methods,a pilot study 认领 引用 被引量：1
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作者 Kaiyu Yang Jianghao Wu +4 位作者 Xinman Li Xinbo Pang Yangchen Yuan Guohui Qi Minsheng Yang 《Journal of Forestry Research》 SCIE CAS CSCD 2022年第6期1751-1764,共14页
To compare the application of traditional morphometric methods(TMMs)and geometric morphometric methods(GMMs)in the study of intraspecific leaf morphological characters of Quercus dentata,fifteen linear measurement ind... To compare the application of traditional morphometric methods(TMMs)and geometric morphometric methods(GMMs)in the study of intraspecific leaf morphological characters of Quercus dentata,fifteen linear measurement indices and thirteen landmarks of leaves were used to study leaf morphology of three provenances(H1,H2,and H3).In TMMs,principal component analysis(PCA)showed that leaf size–related indices played an important role in population classification.Partial least square(PLS)analysis showed that the main morphological characters affecting leaf size were the average depth of the lobes and the length–width ratios.However,the important indices to distinguish the provenances were circularity,leaf width,and length–width ratio.The results of discriminant analysis(DA)showed that 74.0%of H1,68.0%of H2,and 74.0%of H3 were correctly classified.Cluster analysis showed that the Mahalanobis distances between H1 and H2,H1 and H3,and H2 and H3 were 4.3761,11.4629,and 10.2067,respectively.In GMMs,PCA based on symmetrical components showed that the difference in leaf morphology was mainly due to the changing trend of the leaf apex and base,petiole length,and degree of leaf cracking.PLS analysis showed that there was a significant covariation between the leaf symmetrical components and size:as the leaf enlarged,the widest part gradually moved up,and the shape changed from nearly oval to lanceolate.DA results showed that 86.0%and 78.0%of H1 and H2,70.0%and 80.0%of H1 and H3,and 82.0%and 76.0%of H2 and H3 were correctly classified.Canonical variate analysis results showed that the Mahalanobis distances between H1 and H2,H1 and H3,and H2 and H3 were 1.7238,1.5380,and 1.6329,respectively.Both GMMs and TMMs showed significant differences in morphology among the three Q.dentata provenances,but GMMs had higher classification accuracy and could provide more information about leaf shape,whereas TMMs could provide more information about leaf size.Based on our results,GMMs are promising in the study of leaf morphological variation within Q.dentata provenances. 展开更多
关键词 Traditional morphometrics Geometric morphometrics Leaf morphology variation Quercus dentata Intraspecific
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Morphometric discrimination of wild from farmed Dybowski’s frog (Rana dybowskii) based on hindlimb length 认领 引用 被引量：5
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作者 XIA Rui HUANG Xiao-ming +3 位作者 YANG Shu-hui XU Yan-chun Ying Lu Thomas D. Dahmer 《Journal of Forestry Research》 CAS CSCD 2011年第2期269-274,共6页
Commercial farming of anuran species that are declining in the wild raises a need to discriminate wild from farmed frogs.We hypothesized wild frogs might have extended hindlimbs due to greater frequency or intensity o... Commercial farming of anuran species that are declining in the wild raises a need to discriminate wild from farmed frogs.We hypothesized wild frogs might have extended hindlimbs due to greater frequency or intensity of jumping relative to farmed frogs,highlighting a morphometric approach to discrimination of wild from farmed frogs using hindlimb length.In the present study,Dybowski＇s frog（Rana dybowskii） was used to test this hypothesis.We measured body mass（Mb） and hindlimb length（Lh） of 2-year old farmed frogs and wild frogs aged 2 to 5 years.Dybowski＇s frog demonstrated significant dimorphism in Mb and Lh.Mb was significantly greater among farmed 2-year old frogs in both sexes（p=0.000）,while only among females was Lh significantly greater for wild frogs（p=0.000）.Lh/Mb was used as an index for origin discrimination to eliminate the influence of Mb due to variation of husbandry conditions among farms.Mean Lh/Mb for farmed frogs was significantly lower than for wild frogs（p=0.000） in the 2-year old age class.Discrimination correctly classified 84.4% of farmed and 96.3% of wild male frogs.Among females,92.9% of farmed frogs and 90.1% wild frogs were correctly classified.The overall correctness of classification was 92.1% and 90.8% for males and females,respectively.However,Lh/Mb revealed variation with age,resulting in reduced discriminative power for frogs ≥3 years old.We introduced a coefficient Ce to adjust the Lh/Mb of frogs ≥3 years to the level equivalent to 2-year frogs.The adjustment achieved 89.5% for overall correctness of origin for wild males and 92.4% for wild females ≥3 years old.These results show that Lh/Mb is an effective index to discriminate wild from farmed Dybowski＇s frog.Since the physical demands of jumping are common among anurans,this index is also potentially applicable to other anuran species. 展开更多
关键词 Dybowski＇s frog morphometric discrimination wild farmed Rana dybowskii
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Genomic prediction of morphometric and colorimetric traits in Solanaceous fruits 认领 引用 被引量：3
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作者 Hao Tong Amol N.Nankar +9 位作者 Jintao Liu Velichka Todorova Daniela Ganeva Stanislava Grozeva Ivanka Tringovska Gancho Pasev Vesela Radeva-Ivanova Tsanko Gechev Dimitrina Kostova Zoran Nikoloski 《Horticulture Research》 SCIE CSCD 2022年第1期1945-1955,共11页
Selection of high-performance lines with respect to traits of interest is a key step in plant breeding.Genomic prediction allows to determine the genomic estimated breeding values of unseen lines for trait of interest... Selection of high-performance lines with respect to traits of interest is a key step in plant breeding.Genomic prediction allows to determine the genomic estimated breeding values of unseen lines for trait of interest using genetic markers,e.g.single-nucleotide polymorphisms(SNPs),and machine learning approaches,which can therefore shorten breeding cycles,referring to genomic selection(GS).Here,we applied GS approaches in two populations of Solanaceous crops,i.e.tomato and pepper,to predict morphometric and colorimetric traits.The traitswere measured by using scoring-based conventional descriptors(CDs)aswell as by Tomato Analyzer(TA)tool using the longitudinally and latitudinally cut fruit images.The GS performancewas assessed in cross-validations of classificationbased and regression-based machine learning models for CD and TA traits,respectively.The results showed the usage of TA traits and tag SNPs provide a powerful combination to predict morphology and color-related traits of Solanaceous fruits.The highest predictability of 0.89 was achieved for fruit width in pepper,with an average predictability of 0.69 over all traits.The multi-trait GS models are of slightly better predictability than single-trait models for some colorimetric traits in pepper.While model validation performs poorly on wild tomato accessions,the usage as many as one accession per wild species in the training set can increase the transferability of models to unseen populations for some traits(e.g.fruit shape for which predictability in unseen scenario increased from zero to 0.6).Overall,GS approaches can assist the selection of high-performance Solanaceous fruits in crop breeding. 展开更多
关键词 machine learning approacheswhich genomic selection solanaceous cropsietomato gs approaches shorten breeding cyclesreferring determine genomic estimated breeding values morphometric traits genomic selection gs herewe
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Normal sperm head morphometric reference values in fertile Asian males 认领 引用 被引量：2
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作者 Ye-Lin Jia Ying-Bi Wu +6 位作者 Lin Yu Yan Zheng Ting-Ting Yang Yan-Yun Wang Bin Zhou Lin Zhang Fu-Ping Li 《Asian Journal of Andrology》 SCIE CAS CSCD 2024年第3期315-320,共6页
Sperm head morphology is crucial for male factor infertility diagnosis and assessment of male reproductive potential.Severalcriteria are available to analyze sperm head morphology,but they are limited by poor methodol... Sperm head morphology is crucial for male factor infertility diagnosis and assessment of male reproductive potential.Severalcriteria are available to analyze sperm head morphology,but they are limited by poor methodology comparability and populationapplicability.This study aimed to explore comprehensive and new normal morphometric reference values for spermatozoa heads infertile Asian males.An automated sperm morphology analysis system captured 23152 stained spermatozoa from confirmed fertilemales.Of these samples,1856 sperm head images were annotated by three experienced laboratory technicians as“normal”.Weemployed 14 novel morphometric features to describe sperm head size(head length,head width,length/width ratio,and girth),shape(ellipse intersection over union,girth intersection over union,short-axis symmetry,and long-axis symmetry),area(head,acrosome,postacrosomal areas,and acrosome area ratio),and degrees of acrosome and nuclear uniformity.This straight-forwardmethod for the morphometric analysis of sperm by accurate visual measurements is clinically applicable.The measured parameterspresent valuable information to establish morphometric reference intervals for normal sperm heads in fertile Asian males.Thepresented detailed measurement data will be valuable for interlaboratory comparisons and technician training.In vitro fertilizationand andrology laboratory technicians can use these parameters to perform objective morphology evaluation when assessing malefertilization potential. 展开更多
关键词 fertile Asian males head morphometric reference value normal spermatozoa
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Comparison of otolith shape descriptors and morphometrics for stock discrimination of yellow croaker along the Chinese coast 认领 引用 被引量：1
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作者 SONG Junjie ZHAO Bo +2 位作者 LIU Jinhu CAO Liang DOU Shuozeng 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第5期1870-1879,共10页
T his study compared and evaluated the efficiency of two otolith shape descriptors(i.e., the elliptic Fourier transform(EFT) and discrete wavelet transform(DWT)) and morphometrics for stock discrimination. To accompli... T his study compared and evaluated the efficiency of two otolith shape descriptors(i.e., the elliptic Fourier transform(EFT) and discrete wavelet transform(DWT)) and morphometrics for stock discrimination. To accomplish this, sample fish from three stocks of yellow croaker L arimichthys polyactis along the Chinese coast(LDB stock from the Liaodong Bay of the Bohai Sea, JZB stock from the Jiaozhou Bay of the Yellow Sea and CJE stock from the Changjiang River estuary of the East China Sea) were used for otolith morphology analyses. The results showed that morphometrics produced an overall classification success rate of 70.8% in contrast with success rates of 80.0% or 82.0% obtained using EFT or DWT, respectively. This suggests that the two shape descriptors comparably discriminated among the stocks and performed more efficiently than morphometrics. During data adjustment and acquisition, some size variables were excluded from the subsequent discriminant analysis for stock discrimination because they were statistically "inef fective," which could reduce the efficiency of morphometrics and lead to relatively low overall classification success. Both EFT and DWT retain the contour coefficients and thus provide a detailed description of otolith shape, which could improve discriminatory efficiency compared with morphometrics. 展开更多
关键词 otolith stock discrimination discrete wavelet transform elliptic Fourier transform morphometrics Larimichthys polyactis
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A web based tool to merge geometric morphometric data from multiple characters 认领 引用 被引量：2
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作者 Ming Bai Jing Li +7 位作者 Wencheng Wang Rolf G. Beutel Benjamin Wipfle Wangang Liu ShaLi Mengna Zhang Yuanyuan Lu Xingke Yang 《Zoological Systematics》 CSCD 2017年第1期34-45,共12页
Geometric morphometrics （GM） is an important method of shape analysis and increasingly used in a wide range of scientific disciplines. Presently, a single character comparison system of geometric morphometric data i... Geometric morphometrics （GM） is an important method of shape analysis and increasingly used in a wide range of scientific disciplines. Presently, a single character comparison system of geometric morphometric data is used in almost all empirical studies, and this approach is sufficient for many scientific problems. However, the estimation of overall similarity among taxa or objects based on multiple characters is crucial in a variety of contexts （e.g. （semi-）automated identification, phenetic relationships, tracing of character evolution, phylogenetic reconstruction）. Here we propose a new web-based tool for merging several geometric morphometrics data files from multiple characters into a single data file. Using this approach information from multiple characters can be compared in combination and an overall similarity estimate can be obtained in a convenient and geometrically rigorous manner. To illustrate our method, we provide an example analysis of 25 dung beetle species with seven Procrustes superimposed landmark data files representing the morphological variation of body features： the epipharynx, right mandible, pronotum, elytra, hindwing, and the metendosternite in dorsal and lateral view. All seven files were merged into a single one containing information on 649 landmark locations. The possible applications of such merged data files in different fields of science are discussed. 展开更多
关键词 Geometric morphometrics multiple characters merging overall similarity lcs.ios.ac.cn/-mgm.
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A quantitative morphometric comparison of cockpit and doline karst landforms 认领 引用 被引量：4
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作者 LIANG Fuyuan DU Yunyan +1 位作者 GE Yong LI Ce 《Journal of Geographical Sciences》 SCIE CSCD 2014年第6期1069-1082,共14页
This study presented a quantitative comparison of cockpit and doline karst by examining the numbers and characteristics of typical types of landform entities that are developed in Guilin（Guangxi, China）, La Alianza... This study presented a quantitative comparison of cockpit and doline karst by examining the numbers and characteristics of typical types of landform entities that are developed in Guilin（Guangxi, China）, La Alianza（PR, USA）, Avalton（KY, USA）, and Oolitic（IN, USA）. Five types of landform entities were defined： isolated hill（IH）, clustered hills（CHs）, isolated sinkhole（IS）, clustered sinkholes（CSs）, and clustered hills with sinkholes（CHSs）. An algorithm was developed to automatically identify these types of landform entities by examining the contour lines on topographic maps of two cockpit karst areas（Guilin and La Alianza） and two doline karst areas（Oolitic and Avalton）. Within each specific study area, the CHSs is the least developed type yet with a larger size and higher relief. The IH and IS entities are smaller in size, lower in relief, and outnumber their clustered counterparts. The total numbers of these types of entities are quite different in cockpit and doline karst areas. Doline karst is characterized by more negative（IS and CSs） than positive（IH and IHs） landforms and vice versa for cockpit karst. For example, the Guilin study area has 1192 positive landform entities in total, which occupy 9.81% of the total study area. It has only 622 negative landform entities occupying only 3.91% of the total study area. By contrast, the doline karst in Oolitic has 130 negative while only 10 positive landform entities. The positive and negative landforms in Oolitic occupy 12.68% and 2.61% of the total study area, respectively. Furthermore, average relief and slope of the landform entities are much higher and steeper in the cockpit karst than the doline karst areas. For instance, the average slope of CHs in Alvaton is 3.90 degrees while it is 19.78 degrees in La Alianza. The average relief of CSs is 4.07 m and 34.29 m in Oolitic and Guilin respectively. Such a difference within a specific area or between the cockpit and doline karst may reveal different controls on the development of karst landscape. 展开更多
关键词 cockpit doline contours morphometric characteristics topographic map karst
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Morphometrics analysis on the hind wing of Tetrigides(Orthoptera) and its application in taxonomy 认领 引用 被引量：2
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作者 张荣娇 周善义 邓维安 《Entomotaxonomia》 CSCD 2016年第3期175-183,共9页
The morphological characteristics of the hind wing venation of tetrigids were analyzed on the basis of morphometric measurement, with 20 species and 18 different variables selected for this study. Results show that th... The morphological characteristics of the hind wing venation of tetrigids were analyzed on the basis of morphometric measurement, with 20 species and 18 different variables selected for this study. Results show that three principal components have a higher load at the length between the starting point of the costal vein and the tip of the fourth anal vein, between the tip of the costal vein and the tip of the third anal vein, and between the tip of the costal vein and the tip of the eleventh anal vein. There exists a contrast between wing length and width. 展开更多
关键词 morphometric measurement insect morphology evolutionary development
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iCEMIGE: Integration of CEll-morphometrics, MIcrobiome, and GEne biomarker signatures for risk stratification in breast cancers 认领 引用 被引量：1
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作者 Xuan-Yu Mao Jesus Perez-Losada +4 位作者 Mar Abad Marta Rodríguez-González Cesar A Rodríguez Jian-Hua Mao Hang Chang 《World Journal of Clinical Oncology》 2022年第7期616-629,共14页
BACKGROUND The development of precision medicine is essential for personalized treatment and improved clinical outcome,whereas biomarkers are critical for the success of precision therapies.AIM To investigate whether ... BACKGROUND The development of precision medicine is essential for personalized treatment and improved clinical outcome,whereas biomarkers are critical for the success of precision therapies.AIM To investigate whether iCEMIGE(integration of CEll-morphometrics,MIcro-biome,and GEne biomarker signatures)improves risk stratification of breast cancer(BC)patients.METHODS We used our recently developed machine learning technique to identify cellular morphometric biomarkers(CMBs)from the whole histological slide images in The Cancer Genome Atlas(TCGA)breast cancer(TCGA-BRCA)cohort.Multivariate Cox regression was used to assess whether cell-morphometrics prognosis score(CMPS)and our previously reported 12-gene expression prognosis score(GEPS)and 15-microbe abundance prognosis score(MAPS)were independent prognostic factors.iCEMIGE was built upon the sparse representation learning technique.The iCEMIGE scoring model performance was measured by the area under the receiver operating characteristic curve compared to CMPS,GEPS,or MAPS alone.Nomogram models were created to predict overall survival(OS)and progress-free survival(PFS)rates at 5-and 10-year in the TCGA-BRCA cohort.RESULTS We identified 39 CMBs that were used to create a CMPS system in BCs.CMPS,GEPS,and MAPS were found to be significantly independently associated with OS.We then established an iCEMIGE scoring system for risk stratification of BC patients.The iGEMIGE score has a significant prognostic value for OS and PFS independent of clinical factors(age,stage,and estrogen and progesterone receptor status)and PAM50-based molecular subtype.Importantly,the iCEMIGE score significantly increased the power to predict OS and PFS compared to CMPS,GEPS,or MAPS alone.CONCLUSION Our study demonstrates a novel and generic artificial intelligence framework for multimodal data integration toward improving prognosis risk stratification of BC patients,which can be extended to other types of cancer. 展开更多
关键词 Breast cancer Gene signature Microbiome signature Cellular morphometrics signature Multimodal data integration Prognosis
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Geometric morphometrics:Current and future in China 认领 引用 被引量：3
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作者 Ming Bai 《Zoological Systematics》 CSCD 2017年第1期1-3,共3页
Although there were many ancient Chinese mathematicians contributed a lot on geometry, Geometric morphometrics （GM） in modern concept was not firstly proposed by Chinese. The super capability of geometric morphometr... Although there were many ancient Chinese mathematicians contributed a lot on geometry, Geometric morphometrics （GM） in modern concept was not firstly proposed by Chinese. The super capability of geometric morphometries in scientific computing and problem solving has gained a lot of attentions in the world. Until early of 21 centuries, geometric morphometries was introduced into China. Since then, GM was rapidly applied in many research fields. However, it is a pity that GM is still not well-known in China as many works are published out of China. Thus, the special issue ＂Geometric morphometrics： Current shape and future directions＂ is organized. The present issue presents a series of contributions in this scientific field. In future, there will be many considerable new developing fields on GM needed to pay more attentions, for instances, 3D geometric morphometrics, 4D analysis, visualization of amber, new machine developing, new software developing, automatic identification system, etc. Once these technical bottle-necks on 3D data collecting and merging geometric morphometric data from multiple characters could be solved, the automatic identification system and other fields based on Big Data would come true. 展开更多
关键词 Geometric morphometrics 3D LED-SIM visualization multiple characters.
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Morphometrics of Heliolites(Tabulata) from the Late Ordovician, Yushan, Jiangxi, South China 认领 引用
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作者 DAI Mingjian LIU Lu +2 位作者 LEE Dong-Jin PENG Yunbiao MIAO Aisheng 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2015年第1期38-54,共17页
The Upper Ordovician Xiazhen Formation in the Jiangshan-Changshan-Yushan （JCY） triangle area on the Zhejiang-Jiangxi provincial border, South China, is composed of a mixed carbonate-siliciclastic sequence representi... The Upper Ordovician Xiazhen Formation in the Jiangshan-Changshan-Yushan （JCY） triangle area on the Zhejiang-Jiangxi provincial border, South China, is composed of a mixed carbonate-siliciclastic sequence representing various shallow-water platform environments. Highly diversified and abundant heliolitid coral faunas are recognized in the formation and occur over time and space in certain stratigraphic horizons and various lithofacies. Heliolites has been studied using multivariate morphometric analysis applied to differentiate species and evaluate intraspecific and interspecific variations. Ten morphological characters quantified by examination and measurement from transverse and longitudinal thin sections and statistically tested allowed selection of effective characters to discriminate species. Results of frequency histograms, correlation analysis and principle component analysis indicated that certain characters would be suitable for cluster analysis, which were performed on principle component score matrices obtained from the raw data set coordinated with coralla by all those characters. Five major clusters at a relative distance of five on the resulting dendrogram of Heliolites are regarded as morphospecies thus making valid taxa： Heliolites tashanensis Lin and Chow, 1977; Heliolites caracolica （Lin and Chow, 1977）; Heliolites columella （Lin and Chow, 1977）; Heliolites waicunensis Lin and Chow, 1977; and H. sinensis irregularis Lin and Chow, 1977. The discrimination of these morphospecies by the cluster analysis is verified by discriminant analyses and descriptive statistics. 展开更多
关键词 Taxonomy tabulate corals morphometrics Ashgillian Zhejiang-Jiangxi provinces
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QUANTITATIVE STUDIES ON THE DNA CONTENT AND MORPHOMETRIC FEATURES OF LIVER CELL DYSPLASIA 认领 引用
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作者 丛文铭 吴孟超 张秀忠 《Chinese Journal of Cancer Research》 CAS 1989年第2期24-26,共3页
The DNA content and morphometric features of hepatocellular carcinoma (HCC) and liver cell dysplasia (LCD), including nuclear area, nuclear perimeter, nuclear maximum diameter and nuclear circle diameter, were quantit... The DNA content and morphometric features of hepatocellular carcinoma (HCC) and liver cell dysplasia (LCD), including nuclear area, nuclear perimeter, nuclear maximum diameter and nuclear circle diameter, were quantitatively determined by means of image analysis technology. The results showed that in comparison with normal hepatocytes, LCD had a markedly increased DNA content and nuclear morphometric parameters, but the values were lower than those for HCC. LCD showed a slight increase in nuclear atypia represented by the nuclear irregular index, which was also less than HCC. The findings indicate that LCD may be a precaneerous lesion of HCC, to the cells in an abnormal proliferative state. 展开更多
关键词 HCC DNA QUANTITATIVE STUDIES ON THE DNA CONTENT AND MORPHOMETRIC FEATURES OF LIVER CELL DYSPLASIA LCD
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Comparison of the morphometric dynamics of fast-growing and slow-growing strains of turbot Scophthalmus maximus 认领 引用
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作者 王新安 马爱军 《Chinese Journal of Oceanology and Limnology》 CSCD 2015年第4期890-894,共5页
The dynamics of changes in body shape of fast-growing and slow-growing strains of turbot Scophthalmus maximus,and of the differences in body shape between the two strains,were evaluated from 3 to 27 months of age.The ... The dynamics of changes in body shape of fast-growing and slow-growing strains of turbot Scophthalmus maximus,and of the differences in body shape between the two strains,were evaluated from 3 to 27 months of age.The ratios of total length/body length,body width/body length and total length/body width were used as morphometric indices.The two strains exhibited different temporal trends in total length/body length but similar trends in body width/body length and total length/body width.Generally,body width/body length of the two strains increased with time and total length/body width decreased.Thus,the bodies of both fast-growing and slow-growing strains of turbot changed from a narrow to a more rounded shape.However,the ratio total length/body length was generally lower,body width/body length was mostly higher and total length/body width was consistently lower in the fast-growing strain than in the slowgrowing strain.Correlation analysis of the three shape ratios with body weight showed that total length/body length and total length/body width were unsuitable,and that width/body length was suitable,for use as a phenotypic marker for selective breeding of turbot for growth in weight. 展开更多
关键词 Scophthalmus maximus slow-growing strain fast-growing strain morphometric comparison
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The levels of serum fibrosis marks and morphometric quantitative measurement of hepatic fibrosis 认领 引用 被引量：15
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作者 Shi-Bin Xie Ji-Lu Yao +2 位作者 Shu-Sen Zheng Chun-Lan Yao Rong-Qin Zheng From the Department of Infectious Diseases, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, China 《Hepatobiliary & Pancreatic Diseases International》 CAS 2002年第2期202-206,共5页
Objective: To study the relationship between the ser- um levels of hyaluronic acid (HA), procollagen type Ⅲ (PCⅢ), collagen type Ⅳ (CIV) and the histologi- cal degree of hepatic fibrosis evaluated by image analysis... Objective: To study the relationship between the ser- um levels of hyaluronic acid (HA), procollagen type Ⅲ (PCⅢ), collagen type Ⅳ (CIV) and the histologi- cal degree of hepatic fibrosis evaluated by image analysis, and the clinical significance of serum HA, PC Ⅲ, C Ⅳ in the diagnosis of hepatic fibrosis in pa- tients with chronic viral hepatitis. Methods: The concentrations of serum HA, PC Ⅲ, C Ⅳ in 151 patients with chronic viral hepatitis were measured by radioimmunoassay. Liver biopsies were performed in all the patients. Histological sections of 4 μm thickness were stained with Masson's trichrome for fibrosis assessment. Morphometric quantitative measurements for hepatic fibrosis assessment in the 4 μm sections were performed using a fully automated image analysis system. Serum levels of HA, PC Ⅲ, and C Ⅳ were analyzed at different stages of liver pa- thology and compared with the morphometric quanti- tative measurements of hepatic fibrosis. Results: The serum levels of HA, PC Ⅲ, C Ⅳ all ele- vated gradually with the progression of the disease, and all reached the highest in patients with liver cir- rhosis. There was a significant difference in the levels of these 3 components between liver cirrhosis group and the other groups (P<0.05). They all increased steadily with the histological stages of hepatic fibrosis, and reached the highest levels in stage Ⅳ. The serum levels of HA, PC Ⅲ, C Ⅳ were all positive- ly correlated with the histological stages of liver sec- tions and the morphometric measurement (P< 0.001). The coefficients with stages were 0.694, 0.493, 0.552 (P<0.001), respectively and with sur- face density of total collagen on liver biopsy sections by image analysis were 0. 715, 0. 595, 0. 573 (P< 0.001), respectively. Conclusion: The serum levels of HA, PC Ⅲ, C Ⅳ were in consistent with the degree of hepatic fibrosis, and the determination of these marks is valuable for detecting hepatic fibrosis. 展开更多
关键词 hyaluronic acid procollagen type Ⅲ collagen type Ⅳ hepatic fibrosis morphometric measurement
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