Life history patterns of modern and fossil Mercenaria spp. from warm vs. cold climates
Life history patterns of modern and fossil Mercenaria spp. from warm vs. cold climates
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现代和化石 Mercenaria spp 的生活史模式。
DOI：
10.1016/j.palaeo.2021.110227
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Turek, Sage
中科院分区：
文献类型：
--
作者：
Palmer, Kylie L.;Moss, David K.;Surge, Donna;Turek, Sage
最近的工作预测，到21世纪末，海面温度将显著升高。人们对这种温度升高的生物学后果知之甚少。利用保护古生物学方法结合年代学方法的研究设计可以为评估这些后果提供一个强有力的框架。这项研究的重点是生态和经济上重要的硬蛤，佣兵蛤，来自现代和化石环境，生长在比今天温暖或与今天相当的气候下。我们比较了现代雇佣兵的寿命和增长率（von Bertalanffy k）。从上新世中期暖期（MPWP）到早更新世，更好地了解温度对生活史的影响。我们发现，无论是在空间上还是在时间上，生长速率都随着温度的升高而增加。然而，寿命与气候状态之间的关系并不清楚。此外，我们观察到中高纬度个体似乎比低纬度个体更容易受到气候状态变化的影响。我们认为，为了应对海水温度的升高，中纬度和高纬度的个体可能会经历显著的变化，朝着更快的生长速度发展，而低纬度的个体可能看不到这么大的变化。这些发现为佣兵鱼的生长速度和寿命如何随着未来海水温度的升高而变化提供了见解。了解这些影响对于制定未来环境变化的管理战略和政策至关重要。
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 modernMercenariaspp. 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 ofMercenariamight 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.
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