College of Marine Life Science & Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Sci Total Environ. 2022 Aug 25;836:155695. doi: 10.1016/j.scitotenv.2022.155695. Epub 2022 May 4.
In the Southern Ocean, the living environment of organisms has changed due to the dramatic increase in melting sea ice and the loss of glaciers, which have consequently caused substantial changes in biodiversity. Samples of pelagic ciliates from 13 sites were collected as bioindicators to demonstrate the relationship between spatial distribution patterns and environmental heterogeneity affected by sea ice melting and to reveal the community assembly mechanisms in the Ross Sea. Univariate analyses and multivariate analyses were effective tools demonstrating clear spatial patterns and providing a sufficient explanation to interpret strong correlations between pelagic ciliate communities and environmental variations, especially the distribution pattern of nutrients and Chl a. Moreover, environmental heterogeneity might affect the co-occurrence network complexity of ciliate communities. Furthermore, our results also indicated that stochastic processes play a significant role in the community assembly of pelagic ciliates. This study examined the controlling mechanisms of environmental heterogeneity affected by sea ice melting on pelagic ciliate communities and provided explanations for the community assembly of pelagic ciliates in polar marine ecosystems.
在南大洋，由于海冰融化和冰川消融导致生物生存环境发生剧烈变化，生物多样性也因此发生了重大变化。采集了来自 13 个地点的浮游纤毛虫样本作为生物指标，以证明受海冰融化影响的空间分布模式和环境异质性之间的关系，并揭示罗斯海浮游纤毛虫群落的组装机制。单变量分析和多变量分析是有效的工具，能够清晰地显示空间模式，并为解释浮游纤毛虫群落与环境变化之间的强相关性提供充分的解释，特别是营养物质和 Chl a 的分布模式。此外，环境异质性可能会影响纤毛虫群落的共存网络复杂性。此外，我们的结果还表明，随机过程在浮游纤毛虫群落的组装中起着重要作用。本研究考察了海冰融化对浮游纤毛虫群落的环境异质性的控制机制，并为极地海洋生态系统中浮游纤毛虫群落的组装提供了解释。
