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Projected impacts of climate change on functional diversity of frugivorous birds along a tropical elevational gradient

  • Climate change forces many species to move their ranges to higher latitudes or elevations. Resulting immigration or emigration of species might lead to functional changes, e.g., in the trait distribution and composition of ecological assemblages. Here, we combined approaches from biogeography (species distribution models; SDMs) and community ecology (functional diversity) to investigate potential effects of climate-driven range changes on frugivorous bird assemblages along a 3000 m elevational gradient in the tropical Andes. We used SDMs to model current and projected future occurrence probabilities of frugivorous bird species from the lowlands to the tree line. SDM-derived probabilities of occurrence were combined with traits relevant for seed dispersal of fleshy-fruited plants to calculate functional dispersion (FDis; a measure of functional diversity) for current and future bird assemblages. Comparisons of FDis between current and projected future assemblages showed consistent results across four dispersal scenarios, five climate models and two representative concentration pathways. Projections indicated a decrease of FDis in the lowlands, an increase of FDis at lower mid-elevations and little changes at high elevations. This suggests that functional dispersion responds differently to global warming at different elevational levels, likely modifying avian seed dispersal functions and plant regeneration in forest ecosystems along tropical mountains.

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Author:Irene M. A. Bender, W. Daniel Kissling, Katrin Böhning-GaeseORCiDGND, Isabell Hensen, Ingolf Kühn, Larissa Nowak, Till TöpferGND, Thorsten Wiegand, D. Matthias Dehling, Matthias SchleuningORCiDGND
URN:urn:nbn:de:hebis:30:3-565502
DOI:https://doi.org/10.1038/s41598-019-53409-6
ISSN:2045-2322
Pubmed Id:https://pubmed.ncbi.nlm.nih.gov/31776351
Parent Title (German):Scientific reports
Publisher:Macmillan Publishers Limited, part of Springer Nature
Place of publication:[London]
Document Type:Article
Language:English
Date of Publication (online):2019/11/27
Date of first Publication:2019/11/27
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2020/11/04
Volume:9
Issue:17708
Page Number:12
HeBIS-PPN:474012204
Institutes:Biowissenschaften / Biowissenschaften
Angeschlossene und kooperierende Institutionen / Senckenbergische Naturforschende Gesellschaft
Biowissenschaften / Institut für Ökologie, Evolution und Diversität
Fachübergreifende Einrichtungen / Biodiversität und Klima Forschungszentrum (BiK-F)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 590 Tiere (Zoologie)
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0