FOSSIL​ ​GASTROPODS​ FOR USE IN ESTIMATING PALEOCLIMATE AND PALEOECOLOGY IN LAST GLACIAL LOESS, SOUTHWESTERN ILLINOIS

2018 ◽  
Author(s):  
Caitlin Lebel ◽  
◽  
David A. Grimley
Keyword(s):  
Last Glacial ◽  
Fossil Gastropods

Reconstructions of the past distribution of Testudo graeca mitochondrial lineages in the Middle East and Transcaucasia support multiple refugia since the Last Glacial Maximum

2021 ◽  
pp. 10-17
Author(s):  
Oguz Turkozan
Keyword(s):  
Middle East ◽  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Testudo Graeca ◽  
Last Glacial ◽  
The Past ◽  
Precipitation Seasonality ◽  
Multiple Refugia ◽  
The Last Glacial Maximum ◽  
The Last Glacial

A cycle of glacial and interglacial periods in the Quaternary caused species’ ranges to expand and contract in response to climatic and environmental changes. During interglacial periods, many species expanded their distribution ranges from refugia into higher elevations and latitudes. In the present work, we projected the responses of the five lineages of Testudo graeca in the Middle East and Transcaucasia as the climate shifted from the Last Glacial Maximum (LGM, Mid – Holocene), to the present. Under the past LGM and Mid-Holocene bioclimatic conditions, models predicted relatively more suitable habitats for some of the lineages. The most significant bioclimatic variables in predicting the present and past potential distribution of clades are the precipitation of the warmest quarter for T. g. armeniaca (95.8 %), precipitation seasonality for T. g. buxtoni (85.0 %), minimum temperature of the coldest month for T. g. ibera (75.4 %), precipitation of the coldest quarter for T. g. terrestris (34.1 %), and the mean temperature of the driest quarter for T. g. zarudyni (88.8 %). Since the LGM, we hypothesise that the ranges of lineages have either expanded (T. g. ibera), contracted (T. g. zarudnyi) or remained stable (T. g. terrestris), and for other two taxa (T. g. armeniaca and T. g. buxtoni) the pattern remains unclear. Our analysis predicts multiple refugia for Testudo during the LGM and supports previous hypotheses about high lineage richness in Anatolia resulting from secondary contact.

High sediment yields and cool, wet winters: Test of last glacial paleoclimates in the northern Mediterranean

Geology ◽  
2000 ◽  
Vol 28 (11) ◽  
pp. 999-1002 ◽  
Author(s):  
Richard E.L. Collier ◽  
Mike R. Leeder ◽  
Mark Trout ◽  
George Ferentinos ◽  
Evrivriadis Lyberis ◽  
...  
Keyword(s):  
Sediment Yields ◽  
Last Glacial ◽  
High Sediment
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