首页|Plant species richness hotspots and related drivers across spatial scales in small Mediterranean islands

Plant species richness hotspots and related drivers across spatial scales in small Mediterranean islands

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Small islands represent a common feature in the Mediterranean and host a significant fraction of its biodiversity.However,the distribution of plant species richness across spatial scales—from local communities(alpha)to whole islands(gamma)—is largely unknown,and so is the influence of environmental,geographical,and topographical factors.By building upon classic biogeographic theory,we used the species-area relationship and about 4500 vegetation plots in 54 Central Mediterranean small islands to identify hotspots of plant species richness and the underlying spatial determinants across scales.To do so,we fitted and averaged eight species-area models on gamma and alpha richness against island area and plot size,respectively.Based on positive deviations from the fitted curves,we identified 12 islands as cross-scale hotspots.These islands encompassed around 70％of species and habitat richness,as well as almost 50％of the rarest species in the data set,while occupying less than 40％of the total island surface.By fitting generalized linear mixed models,we found that gamma richness was mainly explained by island area and was weakly related to mean annual temperature(positively)and annual precipitation(negatively).As for alpha richness,after accounting for the idiosyncratic effect of habitats and islands,plot size and gamma richness remained the only significant predictors,showing a positive relationship.This work contributes to the understanding of the patterns and drivers of plant diversity in Central Mediterranean small islands and outlines a useful methodology for the prioritization of conservation efforts.

biodiversity hotspotsconservation biogeographyspecies-area relationshipvascular plantsvegetation plots

Riccardo Testolin、Fabio Attorre、Vanessa Bruzzaniti、Riccardo Guarino、Borja Jiménez-Alfaro、Michele Lussu、Stefano Martellos、Michele Di Musciano、Salvatore Pasta、Francesco Maria Sabatini、Francesco Santi、Piero Zannini、Alessandro Chiarucci

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BIOME Lab,Department of Biological,Geological and Environmental Sciences,Alma Mater Studiorum University of Bologna,40126 Bologna,Italy

Centro Interuniversitario per la Biodiversità Vegetale Big Data—PLANT DATA,Department of Biological,Geological and Environmental Sciences,Alma Mater Studiorum University of Bologna,40126 Bologna,Italy

LifeWatch Italy,Lecce,Italy

Department of Environmental Biology,Sapienza University of Rome,00185 Rome,Italy

Department of Biological,Chemical and Pharmaceutical Sciences and Technologies(STEBICEF),University of Palermo,90128 Palermo,Italy

Biodiversity Research Institute(Univ.Oviedo-CSIC-Princ.Asturias),University of Oviedo,Campus de Mieres,33600 Mieres,Spain

Department of Life Sciences,University of Trieste,34128 Trieste,Italy

Department of Life,Health and Environmental Sciences,University of L'Aquila,67100 L'Aquila,Italy

Institute of Biosciences and BioResources(IBBR),Italian National Research Council(CNR),Unit of Palermo,90129 Palermo,Italy

Faculty of Forestry and Wood Sciences,Czech University of Life Sciences Prague,165 00 Praha,Czech Republic

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National Recovery and Resilience Plan(NRRP)Project title National Biodiversity Future Center—NBFCLifeWatch Italy through the project LifeWatchPLUSRita-Levi Montalcini(2019)programme,the Italian Ministry of University

CUP J33C22001190001CIR-01_00028

2024

10.1111/jse.13034

植物分类学报
中国科学院植物研究所　中国植物学会

植物分类学报

CSTPCD
影响因子：0.322
ISSN：1674-4918
年,卷(期)：2024.62(2)
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