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	Author	Cohuo, S.; Macario-González, L.; Wagner, S.; Naumann, K.; Echeverría-Galindo, P.; Pérez, L.; Curtis, J.; Brenner, M.; Schwalb, A.
	Title	Influence of late Quaternary climate on the biogeography of Neotropical aquatic species as reflected by non-marine ostracodes			Type	Journal Article
	Year	2020	Publication	Biogeosciences	Abbreviated Journal	Biogeosciences
	Volume	17	Issue	1	Pages	145-161
	Keywords	SEA-SURFACE TEMPERATURES; LOWLAND CENTRAL-AMERICA; LAGO PETEN ITZA; YUCATAN PENINSULA; RAIN-FOREST; DISTRIBUTION MODELS; LAKE; PLEISTOCENE; PHYLOGEOGRAPHY; GUATEMALA
	Abstract	We evaluated how ranges of four endemic and non-endemic aquatic ostracode species changed in response to long-term (glacial-interglacial cycles) and abrupt climate fluctuations during the last 155 kyr in the northern Neotropical region. We employed two complementary approaches, fossil records and species distribution models (SDMs). Fossil assemblages were obtained from sediment cores PI-1, PI-2, PI-6 and Peten-Itza 22-VIII-99 from the Peten Itza Scientific Drilling Project, Lake Peten Itza, Guatemala. To obtain a spatially resolved pattern of (past) species distribution, a down-scaling cascade is employed. SDMs were reconstructed for the last interglacial (similar to 120 ka), the last glacial maximum (similar to 22 ka) and the middle Holocene (similar to 6 ka). During glacial and interglacial cycles and marine isotope stages (MISs), modelled paleo-distributions and paleo-records show the nearly continuous presence of endemic and non-endemic species in the region, suggesting negligible effects of long-term climate variations on aquatic niche stability. During periods of abrupt ecological disruption such as Heinrich Stadial 1 (HS1), endemic species were resilient, remaining within their current areas of distribution. Non-endemic species, however, proved to be more sensitive. Modelled paleo-distributions suggest that the geographic range of non-endemic species changed, moving southward into Central America. Due to the uncer-tainties involved in the downscaling from the global numerical to the highly resolved regional geospatial statistical modelling, results can be seen as a benchmark for future studies using similar approaches. Given relatively moderate temperature decreases in Lake Peten Itza waters (similar to 5 degrees C) and the persistence of some aquatic ecosystems even during periods of severe drying in HS1, our data suggest (1) the existence of micro-refugia and/or (2) continuous interaction between central metapopulations and surrounding populations, enabling aquatic taxa to survive climate fluctuations in the northern Neotropical region.
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	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1726-4189	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	FCI @ refbase @			Serial	2384
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