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Life history patterns of modern and fossil Mercenaria spp. from warm vs. cold climates

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doi: 10.1016/j.palaeo.2021.110227
Authors:Palmer, Kylie L.; Moss, David K.; Surge, Donna; Turek, Sage
Author Affiliations:Primary:
University of North Carolina at Chapel Hill, Department of Geological Sciences, Chapel Hill, NC, United States
Sam Houston State University, Department of Environmental and Geosciences, Huntsville, TX, United States
Volume Title:Palaeogeography, Palaeoclimatology, Palaeoecology
Source:Palaeogeography, Palaeoclimatology, Palaeoecology, Vol.566. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182
Publication Date:2021
Note:In English. Part of a special section on Reading in the diaries of life; current advances of sclerochronological research, edited by Peharda, M., et. al.. 118 refs.; illus., incl. 3 tables, sketch map
Summary:Recent work projects significant increases in sea surface temperature by the end of the 21st century. The biological consequences of such temperature increases are poorly understood. Study designs using a conservation paleobiology approach combined with sclerochronology methods can provide a powerful framework in which to assess these consequences. This study focuses on the ecological and economically important hard clam, Mercenaria, from modern and fossil settings that grew during climates that were warmer than or comparable to today. We compared lifespans and growth rates (von Bertalanffy k) of modern Mercenaria spp. populations to those from the Mid Pliocene Warm Period (MPWP) and early Pleistocene to better understand the influences of temperature on life history. We found that growth rates tend to increase with increasing temperature both through space and time. However, the relationship between lifespan and climate state is not as clear. Further, we observe that mid-to high-latitude individuals seem to be more impacted by changes in climate state than low latitude individuals. We suggest in response to increased seawater temperatures, mid- and high-latitude individuals might experience significant shifts towards faster growth rates whereas low latitude individuals might not see as much change. These findings provide insight to how growth rates and lifespans of Mercenaria might shift in response to future increases in seawater temperature. Understanding such impacts are critical for the development of management strategies and policies for future environmental change.
Subjects:Age; Bivalvia; Caloosahatchee Formation; Cenozoic; Climate change; Duplin Formation; Gelasian; Growth; Growth rates; Heterodonta; Holocene; Latitude; Lower Pleistocene; Marine environment; Mercenaria; Middle Pliocene; Modern; Mollusca; Neogene; Paleobiology; Paleoclimatology; Paleoecology; Pinecrest Beds; Pleistocene; Pliocene; Quaternary; Sclerochronology; Sea water; Size; Temperature; Tertiary; Upper Cenozoic; Upper Holocene; Veneridae; Veneroida; Waccamaw Formation; Atlantic Coastal Plain; Florida; Gulf Coastal Plain; Lee County Florida; New Hanover County North Carolina; North America; North Carolina; Sanibel Island; United States; Virginia; Wilmington North Carolina; Life history; Mid-Pliocene Warm Period; Von Bertalanffy parameters
Coordinates:N344400 N344400 W0784700 W0784800
N262500 N263000 W0820000 W0821500
Record ID:896536-8
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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