Influence of past archipelago configuration on present-day insular biodiversity patterns
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PANGAEA
2018
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| author | Norder, Sietze Johannes Proios, Kostas V Whittaker, Robert J Alonso, María R Borges, Paulo A V Borregaard, Michael K Cowie, Robert H Florens, F B Vincent de Frias Martins, António M Ibáñez, Miguel Kissling, W Daniel de Nascimento, Lea Otto, Rüdiger Parent, Christine E Rigal, François Warren, Ben H Fernández-Palacios, José María van Loon, E Emiel Triantis, Kostas A Rijsdijk, Kenneth F |
| author_facet | Norder, Sietze Johannes Proios, Kostas V Whittaker, Robert J Alonso, María R Borges, Paulo A V Borregaard, Michael K Cowie, Robert H Florens, F B Vincent de Frias Martins, António M Ibáñez, Miguel Kissling, W Daniel de Nascimento, Lea Otto, Rüdiger Parent, Christine E Rigal, François Warren, Ben H Fernández-Palacios, José María van Loon, E Emiel Triantis, Kostas A Rijsdijk, Kenneth F |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Aim: To quantify the influence of past archipelago configuration on present-day insular biodiversity patterns, and to compare the role of long-lasting archipelago configurations over the Pleistocene to configurations of short duration such as at the Last Glacial Maximum (LGM) and the present-day. Location: 53 volcanic oceanic islands from 12 archipelagos worldwide - Azores, Canary Islands, Cook Islands, Galápagos, Gulf of Guinea, Hawaii, Madeira, Mascarenes, Pitcairn, Revillagigedo, Samoan Islands, and Tristan da Cunha. Time period: The last 800 Kyr, representing the nine most recent glacial-interglacial cycles. Major taxa studied: Land snails and angiosperms. Methods: Species richness data for land snails and angiosperms were compiled from existing literature and species checklists. We reconstructed archipelago configurations at the following sea-levels: the present-day high interglacial sea-level, the intermediate sea-levels that are representative of the Pleistocene, and the low sea-levels of the LGM. We fitted two alternative linear mixed models for each archipelago configuration on the number of single-island endemic, multiple-island endemic, and native non-endemic species. Model performance was assessed based on the goodness-of-fit of the full model, the variance explained by archipelago configuration, and model parsimony. Results: Single-island endemic richness in both taxonomic groups was best explained by intermediate palaeo-configuration (positively by area change, and negatively by palaeo-connectedness), whereas non-endemic native species richness was poorly explained by palaeo-configuration. Single-island endemic richness was better explained by intermediate archipelago configurations than by the archipelago configurations of the LGM or present-day. Main conclusions: Archipelago configurations at intermediate sea-levels - which are representative of the Pleistocene - have left a stronger imprint on single-island endemic richness patterns on volcanic oceanic islands than extreme archipelago configurations that persisted for only a few thousand years (such as the LGM). In understanding ecological and evolutionary dynamics of insular biota it is essential to consider longer-lasting environmental conditions, rather than extreme situations alone. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_893265 |
| institution | PANGAEA |
| language | en |
| publishDate | 2018 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Influence of past archipelago configuration on present-day insular biodiversity patterns Norder, Sietze Johannes Proios, Kostas V Whittaker, Robert J Alonso, María R Borges, Paulo A V Borregaard, Michael K Cowie, Robert H Florens, F B Vincent de Frias Martins, António M Ibáñez, Miguel Kissling, W Daniel de Nascimento, Lea Otto, Rüdiger Parent, Christine E Rigal, François Warren, Ben H Fernández-Palacios, José María van Loon, E Emiel Triantis, Kostas A Rijsdijk, Kenneth F Angiosperm species richness; Area/locality; Distance; Land snail species richness; LATITUDE; Log info; LONGITUDE; Number Aim: To quantify the influence of past archipelago configuration on present-day insular biodiversity patterns, and to compare the role of long-lasting archipelago configurations over the Pleistocene to configurations of short duration such as at the Last Glacial Maximum (LGM) and the present-day. Location: 53 volcanic oceanic islands from 12 archipelagos worldwide - Azores, Canary Islands, Cook Islands, Galápagos, Gulf of Guinea, Hawaii, Madeira, Mascarenes, Pitcairn, Revillagigedo, Samoan Islands, and Tristan da Cunha. Time period: The last 800 Kyr, representing the nine most recent glacial-interglacial cycles. Major taxa studied: Land snails and angiosperms. Methods: Species richness data for land snails and angiosperms were compiled from existing literature and species checklists. We reconstructed archipelago configurations at the following sea-levels: the present-day high interglacial sea-level, the intermediate sea-levels that are representative of the Pleistocene, and the low sea-levels of the LGM. We fitted two alternative linear mixed models for each archipelago configuration on the number of single-island endemic, multiple-island endemic, and native non-endemic species. Model performance was assessed based on the goodness-of-fit of the full model, the variance explained by archipelago configuration, and model parsimony. Results: Single-island endemic richness in both taxonomic groups was best explained by intermediate palaeo-configuration (positively by area change, and negatively by palaeo-connectedness), whereas non-endemic native species richness was poorly explained by palaeo-configuration. Single-island endemic richness was better explained by intermediate archipelago configurations than by the archipelago configurations of the LGM or present-day. Main conclusions: Archipelago configurations at intermediate sea-levels - which are representative of the Pleistocene - have left a stronger imprint on single-island endemic richness patterns on volcanic oceanic islands than extreme archipelago configurations that persisted for only a few thousand years (such as the LGM). In understanding ecological and evolutionary dynamics of insular biota it is essential to consider longer-lasting environmental conditions, rather than extreme situations alone. |
| title | Influence of past archipelago configuration on present-day insular biodiversity patterns |
| topic | Angiosperm species richness; Area/locality; Distance; Land snail species richness; LATITUDE; Log info; LONGITUDE; Number |
| url | https://doi.org/10.1594/PANGAEA.893265 |