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spatial patterns and determinants of Moraceae richness in China

Journal of Plant Ecology 2022年第6期15卷 1142-1153页

作者： Hua-Feng Wang Xiaoting Xu Xia-Lan Cheng Yunpeng Liu Ao Luo Tong Lyu Wen-Long Wang Mir Muhammad Nizamani Zhiheng Wang Key Laboratory of Tropical Biological Resources of Ministry of Education College of Tropical CropsHainan UniversityHaikou 570228China Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China Institute of Ecology and Key Laboratory for Earth surface Processes of the Ministry of Education College of Urban and Environmental SciencesPeking UniversityBeijing 100871China

Understanding large-scale patterns of biodiversity and their drivers remains central in *** hypotheses have been proposed,including hydrothermal dynamic hypothesis,tropical niche conservatism hypothesis,janzen’s hypothesis and a combination model containing energy,water,seasonality and habitat ***,their relative contributions to groups with different lifeforms and range sizes remain controversial,which have limited our ability to understand the general mechanisms underlying species richness *** we evaluated how lifeforms and species range sizes influenced the relative contributions of these three hypotheses to species richness patterns of a tropical family *** distribution data of Moraceae species at a spatial resolution of 50 km×50 km and their lifeforms(***,small trees and large trees)were *** species richness patterns were estimated for the entire family,different life forms and species with different range sizes *** effects of environmental variables on species richness were analyzed,and relative contributions of different hypotheses were evaluated across life forms and species range size *** species richness patterns were consistent across different species groups and the species richness was the highest in sichuan,Guangzhou and Hainan provinces,making these provinces the hotspots of this *** seasonality is the primary factor in determining richness variation of *** best combination model gave the largest explanatory power for Moraceae species richness across each group of range size and life forms followed by the hydrothermal dynamic hypothesis,janzen’s hypothesis and tropical niche conservatism *** these models has a large shared effects but a low independent effect(s suggest unique patterns and mechanisms underlying rare species richness and provide a theoretical basis for protection of the Moraceae species in China

关键词： hydrothermal dynamic hypothesis tropical niche conservatism hypothesis janzen’s hypothesis Moraceae environmental factor China

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