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Distribution,species richness,and relative importance of different plant life forms across drylands in China 认领 引用 被引量：8
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作者 Shuran Yao Weigang Hu +16 位作者 Mingfei Ji Abraham Allan Degen Qiajun Du Muhammad Adnan Akram Yuan Sun Ying Sun Yan Deng Longwei Dong Haiyang Gong Qingqing Hou Shubin Xie Xiaoting Wang Jinzhi Ran Bernhard Schmid Qinfeng Guo Karl J.Niklas Jianming Deng 《Plant Diversity》 SCIE CAS CSCD 2025年第2期273-281,共9页
Studies on plant diversity are usually based on the total number of species in a community.However,few studies have examined species richness(SR)of different plant life forms in a community along largescale environmen... Studies on plant diversity are usually based on the total number of species in a community.However,few studies have examined species richness(SR)of different plant life forms in a community along largescale environmental gradients.Particularly,the relative importance(RIV)of different plant life forms in a community and how they vary with environmental variables are still unclear.To fill these gaps,we determined plant diversity of ephemeral plants,annual herbs,perennial herbs,and woody plants from 187 sites across drylands in China.The SR patterns of herbaceous plants,especially perennial herbs,and their RIV in plant communities increased with increasing precipitation and soil nutrient content;however,the RIV of annual herbs was not altered along these gradients.The SR and RIV of ephemeral plants were affected mainly by precipitation seasonality.The SR of woody plants had a unimodal relationship with air temperature and exhibited the highest RIV and SR percentage in plant communities under the harshest environments.An obvious shift emerged in plant community composition,SR and their critical impact factors at 238.5 mm of mean annual precipitation(MAP).In mesic regions(>238.5 mm),herbs were the dominant species,and the SR displayed a relatively slow decreasing rate with increasing aridity,which was mediated mainly by MAP and soil nutrients.In arid regions(<238.5 mm),woody plants were the dominant species,and the SR displayed a relatively fast decreasing rate with increasing aridity,which was mediated mainly by climate variables,especially precipitation.Our findings highlight the importance of comparative life form studies in community structure and biodiversity,as their responses to gradients differed substantially on a large scale. 展开更多
关键词 Drylands Environmental gradients Plant life forms Relative importance Species richness Threshold
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黄河流域被子植物和陆栖脊椎动物丰富度格局及其影响因子 认领 引用 被引量：6
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作者 孙远 胡维刚 +2 位作者 姚树冉 孙颖 邓建明 《生物多样性》 CAS CSCD 北大核心 2020年第12期1523-1532,共10页
生物多样性的大尺度空间分布格局及其形成机制一直是生态学和生物地理学的核心内容。黄河流域是我国重要的生态屏障,明确该区域动植物多样性分布格局及其影响因素,对我国黄河流域生态保护和高质量发展具有重要意义。本研究通过收集黄河... 生物多样性的大尺度空间分布格局及其形成机制一直是生态学和生物地理学的核心内容。黄河流域是我国重要的生态屏障,明确该区域动植物多样性分布格局及其影响因素,对我国黄河流域生态保护和高质量发展具有重要意义。本研究通过收集黄河流域被子植物和陆栖脊椎动物分布数据,结合气候、环境异质性和人类活动等信息,探讨了黄河流域被子植物和陆栖脊椎动物物种丰富度格局及其主要影响因素。结果表明,黄河流域被子植物和陆栖脊椎动物物种丰富度在区域尺度具有相似的分布格局:南部山地动植物物种丰富度最高,而东部高寒区和北部干旱区物种丰富度最低。回归树模型表明,冠层高度范围和净初级生产力范围分别是黄河流域被子植物和陆栖脊椎动物物种丰富度最重要的预测因子;当移除空间自相关影响后,环境异质性和气候因子依然对区域尺度的动植物物种丰富度具有较高且相似的解释度。表明环境异质性和气候共同决定了黄河流域被子植物和陆栖脊椎动物物种丰富度格局,而人类使用土地面积并不是影响黄河流域动植物物种丰富度格局的主要因子。因此,在未来的研究中若针对不同区域筛选出更精准的环境驱动因子或选用更多不同类别的环境异质性因子进行分析,将有助于更深入理解物种多样性格局的成因。 展开更多
关键词 被子植物 陆栖脊椎动物 空间分布格局 气候 环境异质性 黄河流域
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Morphological and physiological responses to aridity in narrowly-and widely-distributed plant species in drylands 认领 引用 被引量：2
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作者 Junlan Xiong Weigang Hu +13 位作者 Allan Degen Jie Peng Longwei Dong Li Yan Qingqing Hou Shuran Yao Ying Sun Xiaoting Wang Yahui Zhang Yan Deng Liang Wang Muhammad Aqeel Jinzhi Ran Jianming Deng 《Science China(Life Sciences)》 SCIE CAS CSCD 2025年第9期2784-2795,共12页
Leaf functional traits play a pivotal role in understanding the adaptive strategy of plants in extreme environments, as well as in assessing their potential distribution range sizes and extinction risks under global c... Leaf functional traits play a pivotal role in understanding the adaptive strategy of plants in extreme environments, as well as in assessing their potential distribution range sizes and extinction risks under global climate change. However, the response of leaf functional traits to aridity in drylands remains unclear for plants with different range sizes. To fill this gap, we measured 10 leaf functional traits of 152 plant species across 172 dryland sites in China, and classified these species as either narrow-(NRS) or wide-ranging species(WRS) based on worldwide occurrence data. Our results showed that the NRS generally occurred in more severe arid areas, and had higher leaf water content(LWC) than WRS at high aridity levels(aridity>0.8). The scaling exponents between leaf volume(LV) and leaf dry weight(LDW) at high aridity levels were 1 for WRS and 1.56 for NRS, indicating that LV increased at a faster rate than LDW and therefore enabled NRS to store more water than WRS. Using moving window analysis, the above scaling exponents increased in NRS and decreased in WRS with increasing aridity at high aridity levels. Moreover, NRS with higher LWC tended to be more abundant at high aridity levels. Our results highlighted that NRS had higher LWC than WRS under high aridity, conferring them with a key advantage in adapting to extreme arid environments. These findings suggest that NRS and WRS use distinct adaptive strategies to cope with aridity. In the conservation of NRS in drylands, enhancing leaf water storage capacity is of particular importance. 展开更多
关键词 abundance aridity drylands leaf water content species range size
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