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Life history patterns of modern and fossil Mercenaria spp. from warm vs. cold climates
Palaeogeography, Palaeoclimatology, Palaeoecology ( IF 3 ) Pub Date : 2021-01-12 , DOI: 10.1016/j.palaeo.2021.110227
Kylie L. Palmer , David K. Moss , Donna Surge , Sage Turek

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.



中文翻译:

现代和化石Mercenaria spp的生活史模式。来自温暖与寒冷的气候

最近的工作预计到21世纪末海面温度将显着上升。这种温度升高的生物学后果知之甚少。使用保护性古生物学方法结合年代学方法的研究设计可以提供一个强大的框架来评估这些后果。这项研究的重点是现代和化石环境中的生态和经济上重要的硬蛤Mer(Mercenaria),这些环境在比今天温暖或与今天相当的气候下生长。我们比较了现代Mercenaria的寿命和增长率(von Bertalanffy k)spp。从上新世中期(MPWP)到更新世早期的人口,以更好地了解温度对生活史的影响。我们发现随着温度的升高,随着时间和空间的增长,增长率趋于增加。但是,寿命与气候状态之间的关系还不清楚。此外,我们观察到,中低纬度地区的人似乎比低纬度地区的人受气候状况变化的影响更大。我们建议,随着海水温度升高,中高纬度地区的人可能会经历向更快的增长率的重大转变,而低纬度地区的人可能不会看到太大的变化。这些发现提供了对Mercenaria的增长率和寿命的见解。可能会因未来海水温度升高而发生变化。了解这些影响对于制定未来环境变化的管理策略和政策至关重要。

更新日期:2021-01-12
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