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A phylogenetic approach identifies patterns of beta diversity and floristic subregions of the Qinghai-Tibet Plateau

Plant diversity 2024年第1期46卷 59-69页

作者： Haibin Yu Man Yang Zixin Lu Weitao Wang Fangyuan Yu Yonghua Zhang Xue Yin Hongjun Yu Junjie Hu David C.Deane Key Laboratory of Conservation and Application in Biodiversity of South China School of Life SciencesGuangzhou UniversityGuangzhou 510006China School of Ecology Sun Yat-Sen UniversityShenzhen 510275China School of Geography and Remote Sensing Guangzhou UniversityGuangzhou 510006China College of Life and Environmental Science Wenzhou UniversityWenzhou 325035China Centre for Future Landscapes and Department of Environment and Genetics La Trobe UniversityBundooraVIC 3083Australia

Patterns of taxonomic and phylogenetic beta diversity and their relationships with environmental correlates can help reveal the origin and evolutionary history of regional *** Qinghai-Tibet Plateau(QTP)harbors an exceptionally diverse flora,however,a phylogenetic perspective has rarely been used to investigate its beta diversity and floristic *** this study,we used a phylogenetic approach to identify patterns of beta diversity and quantitatively delimit floristic regions on the Qinghai-Tibet *** also examined the relationships between multifaceted beta diversity,geographical distance,and climatic difference,and evaluated the relative importance of various factors(i.e.,climate,topography and history)in shaping patterns of beta diversity.Sørensen dissimilarity indices indicated that patterns of species turnover among sites dominated the *** also found that patterns of both taxonomic and phylogenetic beta diversity were significantly related to geographical distance and climatic *** environmental factors that contributed most to these patterns of beta diversity include annual precipitation,mean annual temperature,climatic gradients and climatic *** dendrograms of dissimilarity and non-metric multidimensional scaling ordination based on phylogenetic beta diversity data identified ten floristic subregions in the *** results suggest that the contemporary environment and historical climate changes have filtered species composition among sites and eventually determined beta diversity patterns of plants in the QTP.

关键词： Biogeographical regionalization phylogenetic beta diversity Seed plants Sørensen dissimilarity Qinghai-Tibet Plateau

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phylogenetic structure and phylogenetic diversity of angiosperm assemblages in forests along an elevational gradient in Changbaishan,

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Journal of Plant Ecology 2014年第2期7卷 154-165页

作者： Hong Qian Zhanqing Hao Jian Zhang Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL 62703USA State Key Laboratory of Forest and Soil Ecology Institute of Applied EcologyChinese Academy of SciencesShenyang 110164China Department of Renewable Resources University of AlbertaEdmontonAlberta T6G 2H1Canada

Aims Understanding what drives the variation in species composition and diversity among local communities can provide insights into the mechanisms of community *** ecological traits are often thought to be phylogenetically conserved,there should be patterns in phylogenetic structure and phylogenetic diversity in local communities along ecological *** investigate potential patterns in angiosperm assemblages along an elevational gradient with a steep ecological gradient in Changbaishan,*** We used 13 angiosperm assemblages in forest plots(32×32 m)distributed along an elevational gradient from 720 to 1900 m above sea *** used Faith’s phylogenetic diversity metric to quantify the phylogenetic alpha diversity of each forest plot,used the net relatedness index to quantify the degree of phylogenetic relatedness among angiosperm species within each forest plot and used a phylogenetic dissimilarity index to quantify phylogenetic beta diversity among forest *** related the measures of phylogenetic structure and phylogenetic diversity to environmental(climatic and edaphic)*** Findings Our study showed that angiosperm assemblages tended to be more phylogenetically clustered at higher elevations in *** finding is consistent with the prediction of the phylogenetic niche conservatism hypothesis,which highlights the role of niche constraints in governing the phylogenetic structure of *** study also showed that woody assemblages differ from herbaceous assemblages in several major ***,phylogenetic clustering dominated in woody assemblages,whereas phylogenetic overdispersion dominated in herbaceous assemblages;second,patterns in phylogenetic relatedness along the elevational and temperature gradients of Changbaishan were stronger for woody assemblages than for herbaceous assemblages;third,environmental variables explained much more variations in phylogenetic relatedness,phylogenetic alpha diver

关键词： elevational diversity gradient herbaceous plants net relatedness index phylogenetic alpha diversity phylogenetic beta diversity woody plants

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Contrasting effects of space and environment on functional and phylogenetic dissimilarity in a tropical forest

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Journal of Plant Ecology 2019年第2期12卷 314-326页

作者： Mengesha Asefa Calum Brown Min Cao Guocheng Zhang Xiuqin Ci Liqing Sha Jie Li Luxiang Lin Jie Yang Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of Sciences666303 YunnanChina Karlsruhe Institute of Technology Institute of Meteorology and Climate ResearchAtmospheric Environmental Research(IMK-IFU)Kreuzeckbahnstraße 1982467 Garmisch-PartenkirchenGermany

Aims The evolutionary history and functional traits of species can illumi-nate ecological processes supporting coexistence in diverse forest ***,little has been done in decoupling the rela-tive importance of these mechanisms on the turnover of phylogenetic and functional characteristics across life stages and spatial ***,this study aims to estimate the contribution of environment and dispersal on the turnover of phylogenetic and functional diversity across life stages and spatial scales,in order to build a coherent pic-ture of the processes responsible for species *** We conducted the study in Xishuangbanna Forest Dynamics Plot in Yunnan Province,southwest *** used four different spatial point process models to estimate the relative importance of disper-sal limitation and environmental *** functional traits and phylogenetic relationships of all individual trees were incorporated in the analyses to generate measures of dissimilarity in terms of pair-wise and nearest-neighbor phylogenetic and functional characteris-tics across life stages and spatial *** Findings We found non-random patterns of phylogenetic and functional turnover across life stages and spatial *** filtering structured pairwise phylogenetic and functional beta diversity across spatial scales,while dispersal limitation alone,and in combination with environment filtering,shaped nearest neighbor phylogenetic and functional beta *** relative importance of dispersal limitation and environmental filtering appeared to change with life stage but not with spatial *** findings suggest that phylogenetic and functional beta diversity help to reveal the ecological processes responsible for evolu-tionary and functional assembly and highlight the importance of using a range of different metrics to gain full insights into these processes.

关键词： community assembly functional beta diversity life stage phylogenetic beta diversity spatial point pattern

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