The impact of Cenozoic cooling on assemblage diversity in planktonic foraminifera
| Autor: | Fenton, I, Pearson, P, Dunkley Jones, T, Farnsworth, A, Lunt, D, Markwick, P, Purvis, A |
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| Přispěvatelé: | Natural Environment Research Council (NERC) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Evolutionary Biology
Planktonic foraminifera Time Factors Fossils Climate Change global climate model Latitudinal diversity gradient Articles Biodiversity Foraminifera 11 Medical And Health Sciences 06 Biological Sciences Plankton Eocene Biological Evolution planktonic foraminifera latitudinal diversity gradient Research Article |
| Zdroj: | Fenton, I, Pearson, PN, Dunkley Jones, T, Farnsworth, A J, Lunt, D J, Markwick, P & Purvis, A 2016, ' The impact of Cenozoic cooling on assemblage diversity in planktonic foraminifera ', Philosophical Transactions B: Biological Sciences, vol. 371, 20150224 . https://doi.org/10.1098/rstb.2015.0224 ResearcherID Philosophical Transactions of the Royal Society B: Biological Sciences |
| ISSN: | 0962-8436 |
| DOI: | 10.1098/rstb.2015.0224 |
| Popis: | The Cenozoic planktonic foraminifera (calcareous zooplankton) have arguably the most detailed fossil record of any group. The quality of this record allows models of environmental controls on macroecology, developed for Recent assemblages, to be tested on intervals with profoundly different climatic conditions. These analyses shed light on the role of long-term global cooling in establishing the modern latitudinal diversity gradient – one of the most powerful generalizations in biogeography and macroecology. Here we test the transferability of environment-diversity models developed for modern planktonic foraminiferal assemblages to the Eocene epoch (~56 to 34 Mya), a time of pronounced global warmth. Environmental variables from global climate models are combined with Recent environment-diversity models to predict Eocene richness gradients, which are then compared with observed patterns. The results indicate the modern latitudinal diversity gradient – lower richness towards the poles – developed through the Eocene. Three possible causes are suggested for the mismatch between statistical model predictions and data in the early Eocene: the environmental estimates are inaccurate, the statistical model misses a relevant variable, or the intercorrelations among facets of diversity – e.g. richness, evenness, functional diversity – have changed over geological time. By the late Eocene environment-diversity relationships were much more similar to those found today. |
| Databáze: | OpenAIRE |
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