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Bioenergetic traits of three keystone marine species in the food web of a pristine Patagonian fjord
Journal of Sea Research ( IF 2.1 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.seares.2020.101984
Paula A. Ruiz-Ruiz , Sergio Contreras , Eduardo Quiroga , Ángel Urzúa

Abstract The Patagonian fjords are high-latitude aquatic ecosystems, highly sensitive to climate change and play a key role in the exchange of organic matter and carbon flows between terrestrial and marine environments. The bioenergetic composition of species living in these ecosystems are fundamental to understanding the distribution, seasonal variations, and exchange of organic matter within benthic communities. This study reports on the bioenergetic characteristics (lipids, protein, glucose, and energy content) of three keystone species with different life-style and feeding habits: a benthic sea star (Ctenodiscus australis); squat lobster (Munida gregaria); and a Patagonian notothenioid (Eleginops maclovinus). Samples were obtained from the Yendegaia Fjord (54°40'S - 68°50′W) in Chilean Patagonia. Our results indicate that M. gregaria has higher concentrations of lipids, proteins, glucose, and total energy compared to either E. maclovinus or C. australis. The predominance of lipids in all species is possibly related to physiological characteristics and feeding strategies. Also, may be associated with the availability of food and environmental conditions typical of a fjord ecosystem and the reproductive stage in that they were collected. These results suggest that marine animals inhabiting glacially influenced environments with low temperature and low productivity, requires a convergent physiological strategy characterized by high levels of energy storage (i.e. lipids) for metabolism and key bioenergetic processes such as growth and reproduction.

中文翻译:

原始巴塔哥尼亚峡湾食物网中三种关键海洋物种的生物能量特征

摘要 巴塔哥尼亚峡湾是高纬度水生生态系统,对气候变化高度敏感,在陆地和海洋环境之间的有机质和碳流交换中起着关键作用。生活在这些生态系统中的物种的生物能组成对于了解底栖群落内有机物质的分布、季节性变化和交换至关重要。本研究报告了三种具有不同生活方式和饮食习惯的关键物种的生物能量特征(脂质、蛋白质、葡萄糖和能量含量):底栖海星(Ctenodiscus australis);蹲龙虾(Munida gregaria);和巴塔哥尼亚notothenioid (Eleginops maclovinus)。样品来自智利巴塔哥尼亚的 Yendegaia Fjord (54°40'S - 68°50'W)。我们的结果表明 M. 与 E. maclovinus 或 C. australis 相比,gregaria 具有更高浓度的脂质、蛋白质、葡萄糖和总能量。所有物种中脂质的优势可能与生理特征和饲养策略有关。此外,可能与食物的可用性和峡湾生态系统典型的环境条件以及收集它们的繁殖阶段有关。这些结果表明,海洋动物栖息在受冰川影响的低温和低生产力环境中,需要一种收敛的生理策略,其特征是高水平的能量储存(即脂质)用于新陈代谢和关键的生物能量过程,如生长和繁殖。所有物种中脂质的优势可能与生理特征和饲养策略有关。此外,可能与峡湾生态系统的典型食物和环境条件以及收集它们的繁殖阶段有关。这些结果表明,海洋动物栖息在受冰川影响的低温和低生产力环境中,需要一种收敛的生理策略,其特征是高水平的能量储存(即脂质)用于新陈代谢和关键的生物能量过程,如生长和繁殖。所有物种中脂质的优势可能与生理特征和饲养策略有关。此外,可能与峡湾生态系统的典型食物和环境条件以及收集它们的繁殖阶段有关。这些结果表明,海洋动物栖息在受冰川影响的低温和低生产力环境中,需要一种收敛的生理策略,其特征是高水平的能量储存(即脂质)用于新陈代谢和关键的生物能量过程,如生长和繁殖。可能与食物的可用性和峡湾生态系统典型的环境条件以及收集它们的繁殖阶段有关。这些结果表明,海洋动物栖息在受冰川影响的低温和低生产力环境中,需要一种收敛的生理策略,其特征是高水平的能量储存(即脂质)用于新陈代谢和关键的生物能量过程,如生长和繁殖。可能与食物的可用性和峡湾生态系统典型的环境条件以及收集它们的繁殖阶段有关。这些结果表明,海洋动物栖息在受冰川影响的低温和低生产力环境中,需要一种收敛的生理策略,其特征是高水平的能量储存(即脂质)用于新陈代谢和关键的生物能量过程,如生长和繁殖。
更新日期:2021-01-01
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