Comparing spatial diversification and meta-population models in the Indo-Australian Archipelago

Type Article
Date 2018-03
Language English
Author(s) Chalmandrier Loic1, 2, Albouy CamilleORCID1, 2, Descombes Patrice1, 2, Sandel Brody3, Faurby Soren4, 5, Syenning Jens-Christian6, 7, Zimmermann Niklaus E.ORCID2, Pellissier Loic1, 2
Affiliation(s) 1 : Swiss Fed Inst Technol, Landscape Ecol, Inst Terr Ecosyst, Zurich, Switzerland.
2 : Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland.
3 : Santa Clara Univ, Dept Biol, 500 El Camino Real, Santa Clara, CA 95053 USA.
4 : CSIC, Museo Nacl Ciencias Nat, Dept Biogeog & Global Change, Madrid, Spain.
5 : Univ Gothenburg, Dept Biol & Environm Sci, Box 461, SE-40530 Gothenburg, Sweden.
6 : Aarhus Univ, Dept Biosci, Sect Ecoinformat & Biodivers, DK-8000 Aarhus C, Denmark.
7 : Aarhus Univ, Ctr Biodivers Dynam Changing World BIOCHANGE, Ny Munkegade 114, Aarhus, Denmark.
Source Royal Society Open Science (2054-5703) (Royal Soc), 2018-03 , Vol. 5 , N. 3 , P. 171366 (14p.)
DOI 10.1098/rsos.171366
WOS© Times Cited 7
Keyword(s) allopatric speciation, continental drift, dispersal, diversification, meta-population model, neutral model

Reconstructing the processes that have shaped the emergence of biodiversity gradients is critical to understand the dynamics of diversification of life on Earth. Islands have traditionally been used as model systems to unravel the processes shaping biological diversity. MacArthur and Wilson's island biogeographic model predicts diversity to be based on dynamic interactions between colonization and extinction rates, while treating islands themselves as geologically static entities. The current spatial configuration of islands should influence meta-population dynamics, but long-term geological changes within archipelagos are also expected to have shaped island biodiversity, in part by driving diversification. Here, we compare two mechanistic models providing inferences on species richness at a biogeographic scale: a mechanistic spatial-temporal model of species diversification and a spatial meta-population model. While the meta-population model operates over a static landscape, the diversification model is driven by changes in the size and spatial configuration of islands through time. We compare the inferences of both models to floristic diversity patterns among land patches of the Indo-Australian Archipelago. Simulation results from the diversification model better matched observed diversity than a meta-population model constrained only by the contemporary landscape. The diversification model suggests that the dynamic repositioning of islands promoting land disconnection and reconnection induced an accumulation of particularly high species diversity on Borneo, which is central within the island network. By contrast, the meta-population model predicts a higher diversity on the mainlands, which is less compatible with empirical data. Our analyses highlight that, by comparing models with contrasting assumptions, we can pinpoint the processes that are most compatible with extant biodiversity patterns.

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Chalmandrier Loic, Albouy Camille, Descombes Patrice, Sandel Brody, Faurby Soren, Syenning Jens-Christian, Zimmermann Niklaus E., Pellissier Loic (2018). Comparing spatial diversification and meta-population models in the Indo-Australian Archipelago. Royal Society Open Science, 5(3), 171366 (14p.). Publisher's official version : , Open Access version :