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| 1 | Trees of Panama: A complete checklist with every geographic range显示文摘Background Central America is one of the most diverse floristic provinces in the world,but comprehensive plant lists for the region are incomplete and need frequent updating.Full geographic ranges of individual species are seldom known.Our detailed forest inventory plots of Panama thus lack a global geographic perspective.In order to provide one,we assembled a thoroughly vetted checklist of all tree species of Panama,along with an estimate of each one’s range size based on published specimen records.Results 1)Panama has 3043 tree species in 141 families and 752 genera;57.6%were≥10 m tall and 16.9%were 3-5 m tall.2)The widest ranges were>1.5×107 km2,covering the entire neotropics and reaching>30∘latitude;12.4%of the species had ranges exceeding 107 km2.The median range was 6.9×105 km2.3)At the other extreme,16.2%of the species had a range<20,000 km2,a criterion suggesting endangered status.4)Range size increased with a tree species’height and varied significantly among families.5)Tree census plots,where we mapped and measured all individuals,captured 27.5%of the tree species,but a biased selection relative to range size;only 4.5%of the species in plots had ranges<20,000 km2.Conclusions Our checklist of the trees of Panama,based on rigorous criteria aimed at matching plot censuses,is 20%larger than previous.By recording species’maximum heights,we allow comparisons with other regions based on matching definitions,and the range sizes provide a quantitative basis for assessing extinction risk.Our next goal is to merge population density from plot censuses to add rigor to predictions of extinction risk of poorly-studied tropical tree species. | Richard Condit Salomón Aguilar Rolando Pérez | 2020 | Forest Ecosystems2020，7，3： | 1 |
| 2 | Community structure and species diversity dynamics of a subtropical evergreen broad-leaved forest in China:2005 to 2020显示文摘Here,we characterize the temporal and spatial dynamics of forest community structure and species diversity in a subtropical evergreen broad-leaved forest in China.We found that community structure in this forest changed over a 15-year period.Specifically,renewal and death of common species was large,with the renewal of individuals mainly concentrated within a few populations,especially those of Aidia canthioides and Cryptocarya concinna.The numbers of individual deaths for common species were concentrated in the small and mid-diameter level.The spatial distribution of community species diversity fluctuated in each monitoring period,showing a more dispersed diversity after the 15-year study period,and the coefficient of variation on quadrats increased.In 2010,the death and renewal of the community and the spatial variation of species diversity were different compared to other survey years.Extreme weather may have affected species regeneration and community stability in our subtropical monsoon evergreen broad-leaved forests.Our findings suggest that strengthening the monitoring and management of the forest community will help better understand the long-and short-term causes of dynamic fluctuations of community structure and species diversity,and reveal the factors that drive changes in community structure. | Shi-Guang Wei Lin Li Kun-Dong Bai Zhi-Feng Wen Jing-Gang Zhou Qin Lin | 2024 | Plant Diversity2024，46，1： | 0 |
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