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The Biogeographic Network of Birds in the Brazilian Cerrado May Guide Conservation Efforts

research in Ecology 2022年第3期4卷 42-53页

作者： Lívia P.De Sordi rochely S.Morandini vânia r.pivello Mariana M.vidal JoséC.Motta-Junior Department of Ecology Instituto de BiociênciasUniversidade de São PauloRua do MatãoTravessa 14Cidade UniversitáriaSão PauloSP05508-090Brazil

The Brazilian Cerrado,characterized by grasslands,savannahs and riverine forests,is a biodiversity hotspot,threatened by the expansion of the agricultural frontier,and therefore,needs effective conservation *** the national level,the Cerrado core-region has received more conservation efforts than the marginal(non-core)areas,being considered more ***,many marginal areas are also home to high species richness and *** represent a highly diverse and widely distributed biological group,whose variety of functions gives them important roles in the maintenance of ecosystem *** this study the authors analysed the distribution patterns of bird biodiversity in the Brazilian Cerrado and verified whether a separation into core and marginal Cerrado zones would make sense for birds’distribution,as this is an important issue concerning resources allocation for biodiversity *** authors developed a biogeographic network analysis considering 42 sites with savannah vegetation distributed throughout the country and built two presence-absence matrices for birds-with and without species typical of the woodland Cerrado and forest physiognomies-and generated two biogeographic *** network without woodland/forest bird species showed no modularity,whereas the complete network produced three modules:Northwest,Centre-South and *** modularity was mainly determined by forest/woodland bird *** Northwest region was richer and had a greater number of regional species compared to the other two modules;lower richness of bird species was found in the Centre-South region,which had more widespread *** biogeographic pattern for the Cerrado birds perceived in this study did not evidence a clear dichotomy between core versus marginal ***,the same conservation effort should be implemented throughout the Cerrado.

关键词： Bird assembly Bird species distribution Conservation effort Savannah

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