Latitudinal diversity gradients in bryophytes and woody plants： Roles of temperature and water availability  

作　　者：Sheng-Bin Chen J. W. Ferry Slik Jie Gao Ling-Feng Mao Meng-Jie Bi Meng-Wei Shen Ke-Xin Zhou 

机构地区：[1]Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China [2]Institute for Biodiversity and Environmental Research (IBER), Universiti Brunei Darussalam, Gadong BE1410, Brunei Darussalam [3]Forestry College of Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China [4]Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA [5]College of Earth Science, Chengdu University of Technology, Chengdu 610059, China [6]College of Tourism and Urban-Rural Planning, Chengdu University of Technology, Chengdu 610059, China

出　　处：《Journal of Systematics and Evolution》2015年第6期535-545,共11页植物分类学报（英文版）

摘　　要：It remains unclear whether the latitudinal diversity gradients of micro- and macro-organisms are driven by the same macro-environmental variables. We used the newly completed species catalog and distribution information of bryophytes in China to explore their spatial species richness patterns, and to investigate the underlying roles of energy availability, climatic seasonality, and environmental heterogeneity in shaping these patterns. We then compared these patterns to those found for woody plants. We found that, unlike woody plants, mosses and liverworts showed only weakly negative latitudinal trends in species richness. The spatial patterns of liverwort richness and moss richness were overwhelmingly explained by contemporary environmental variables, although explained variation was lower than that for woody plants. Similar to woody plants, energy and climatic seasonality hypotheses dominate as explanatory variables but show high redundancy in shaping the distribution of bryophytes. Water variables, that is, the annual availability, intra-annual variability and spatial heterogeneity in precipitation, played a predominant role in explaining spatial variation of species richness of bryophytes, especially for liverworts, whereas woody plant richness was affected most by temperature variables. We suggest that further research on spatial patterns of bryophytes should incorporate the knowledge on their ecophysiology and evolution.It remains unclear whether the latitudinal diversity gradients of micro- and macro-organisms are driven by the same macro-environmental variables. We used the newly completed species catalog and distribution information of bryophytes in China to explore their spatial species richness patterns, and to investigate the underlying roles of energy availability, climatic seasonality, and environmental heterogeneity in shaping these patterns. We then compared these patterns to those found for woody plants. We found that, unlike woody plants, mosses and liverworts showed only weakly negative latitudinal trends in species richness. The spatial patterns of liverwort richness and moss richness were overwhelmingly explained by contemporary environmental variables, although explained variation was lower than that for woody plants. Similar to woody plants, energy and climatic seasonality hypotheses dominate as explanatory variables but show high redundancy in shaping the distribution of bryophytes. Water variables, that is, the annual availability, intra-annual variability and spatial heterogeneity in precipitation, played a predominant role in explaining spatial variation of species richness of bryophytes, especially for liverworts, whereas woody plant richness was affected most by temperature variables. We suggest that further research on spatial patterns of bryophytes should incorporate the knowledge on their ecophysiology and evolution.

关 键 词：BIOGEOGRAPHY environmental determinants latitudinal gradient of diversity LIVERWORTS micro-organism diversity mosses. 

分 类 号：Q949.35[生物学—植物学] Q949.4