Effects of Global Warming on Ancient Mammalian Communities and Their Environments
作者： Larisa R. G. DeSantis , Robert S. Feranec , Bruce J. MacFadden
DOI: 10.1371/JOURNAL.PONE.0005750
关键词: Climate change 、 Ecology 、 Extinction 、 Extinction risk from global warming 、 Niche differentiation 、 Global warming 、 Interglacial 、 Biology 、 Biodiversity 、 Ecological niche
摘要: Background: Current global warming affects the composition and dynamics of mammalian communities can increase extinction risk; however, long-term effects on mammals are less understood. Dietary reconstructions inferred from stable isotopes fossil herbivorous tooth enamel document environmental climatic changes in ancient ecosystems, including C3/C4 transitions relative seasonality. Methodology/Principal Findings: Here, we use carbon oxygen preserved teeth to magnitude dietary shifts floral change during geologically documented glacial interglacial periods Pliocene (,1.9 million years ago) Pleistocene (,1.3 Florida. Stable isotope data demonstrate increased aridity, C4 grass consumption, inter-faunal partitioning, isotopic niche breadth mixed feeders, partitioning phylogenetically similar taxa, differences seasonality with warming. Conclusion/Significance: Our show that resulted dramatic vegetation even at lower latitudes (,28uN). results also question models predict long term decline species based assumption niches conserved over time. These findings have immediate relevance clarifying possible biotic responses current modern ecosystems.
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