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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 (2018): Influence of past archipelago configuration on present-day insular biodiversity patterns. PANGAEA, https://doi.org/10.1594/PANGAEA.893265, Supplement to: Norder, SJ et al. (2018): Beyond the Last Glacial Maximum: Island endemism is best explained by long-lasting archipelago configurations. Global Ecology and Biogeography, https://doi.org/10.1111/geb.12835

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Abstract:
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.
Related to:
Norder, Sietze Johannes; Baumgartner, John B; Borges, Paulo A V; Hengl, Tomislav; Kissling, W Daniel; van Loon, E Emiel; Rijsdijk, Kenneth F (2018): A global spatially explicit database of changes in island palaeo-area and archipelago configuration during the late Quaternary. Global Ecology and Biogeography, https://doi.org/10.1111/geb.12715
Norder, Sietze Johannes; Baumgartner, John B; Borges, Paulo A V; Hengl, Tomislav; Kissling, W Daniel; van Loon, E Emiel; Rijsdijk, Kenneth F (2017): Paleo Islands and Archipelago Configuration (PIAC) database. PANGAEA, https://doi.org/10.1594/PANGAEA.880585
Coverage:
Median Latitude: 6.825830 * Median Longitude: -69.972946 * South-bound Latitude: -40.318810 * West-bound Longitude: -170.717620 * North-bound Latitude: 39.699100 * East-bound Longitude: 63.421350
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Area/localityAreaNorder, Sietze JohannesIsland
2Area/localityAreaNorder, Sietze JohannesArchipelago
3LATITUDELatitudeNorder, Sietze JohannesGeocode
4LONGITUDELongitudeNorder, Sietze JohannesGeocode
5Land snail species richnessLand snail S#Norder, Sietze JohannesSingle-island endemic
6Land snail species richnessLand snail S#Norder, Sietze JohannesMultiple-island endemic
7Land snail species richnessLand snail S#Norder, Sietze JohannesNative (non-endemic)
8Land snail species richnessLand snail S#Norder, Sietze JohannesPalaeo-island endemic at median sea-level
9Land snail species richnessLand snail S#Norder, Sietze JohannesPalaeo-island endemic at most frequent sea-level
10Land snail species richnessLand snail S#Norder, Sietze JohannesPalaeo-island endemic at a sea-level of -122m
11Land snail species richnessLand snail S#Norder, Sietze JohannesPalaeo-island endemic at glacial maximum sea-level
12Angiosperm species richnessAngiosperm S#Norder, Sietze JohannesSingle-island endemic
13Angiosperm species richnessAngiosperm S#Norder, Sietze JohannesNative (non-endemic)
14Angiosperm species richnessAngiosperm S#Norder, Sietze JohannesPalaeo-island endemic at a sea-level of -122m
15DistanceDistancekmNorder, Sietze JohannesOf current isolation
16NumberNoNorder, Sietze JohannesPalaeo-connectedness at median sea-level
17NumberNoNorder, Sietze JohannesPalaeo-connectedness at most frequent sea-level
18NumberNoNorder, Sietze JohannesPalaeo-connectedness at a sea-level of -122m
19NumberNoNorder, Sietze JohannesPalaeo-connectedness at glacial maximum sea-level
20Log infoLogNorder, Sietze JohannesLog-transformed current area
21Log infoLogNorder, Sietze JohannesLog-transformed area at median sea-level
22Log infoLogNorder, Sietze JohannesLog-transformed area at most frequent sea-level
23Log infoLogNorder, Sietze JohannesLog-transformed area at a sea-level of -122m
24Log infoLogNorder, Sietze JohannesLog-transformed area at glacial maximum sea-level
Size:
1166 data points

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