锋面影响长江口及其邻近地区的鱼类群落结构

IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY
Yihui Jiang , Feng Zhao , Xiaojing Shi , Ling Cao , Cong Zeng
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引用次数: 0

摘要

散布是海洋生物生存能力的关键因素,受到海洋物理动力学的强烈影响。锋面是海洋动力学中的常见现象,理论上会影响生物的扩散,并最终导致海洋生物群落的空间同质性或异质性。然而,对于锋面的形成是否会阻碍群落之间的联系,从而导致群落结构的差异,人们的认识相对有限。为了验证锋面的形成是否会导致群落间的差异,研究人员从长江口及其邻近地区的 32 个地点采集了 60 个 eDNA 样品及其环境参数,并将其分为长江锋面内侧组(YRI)、长江锋面外侧组(YRO)、浙江沿海锋面内侧组(ZCI)和浙江沿海锋面外侧组(ZCO)四组,比较研究了锋面两侧鱼类群落的差异。结果表明,YRI 和 YRO 之间存在显著差异,表明前沿影响了群落结构。ZCI 和 ZCO 之间的鱼类群落没有明显差异,这表明锋面只能在高强度下阻碍鱼类的扩散。YRI 和 YRO 之间的差异可能是由于锋面引起的温度、盐度和浊度的急剧变化造成的。锋面还将具有不同环境特征的水团分开,从而将鱼类吸引到其最佳栖息地。总之,锋面似乎对鱼类的扩散和群落分化具有重要的生态意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fronts affect fish community structure in the Yangtze River estuary and its adjacent area

Dispersal, a critical factor in the viability of marine organisms, is strongly influenced by the physical dynamics of the ocean. Fronts, as a common phenomenon in ocean dynamics, can theoretically impact the dispersal of organisms and ultimately cause spatial homogeneity or heterogeneity of marine communities. However, there is relatively limited understanding concerning whether frontal formation hinders the connectivity between communities and thus results in differences in community structure. To verify whether the formation of fronts caused differences between communities, 60 eDNA samples and their environmental parameters were collected from 32 sites in the Yangtze River estuary and its adjacent area, and four groups, the Yangtze River front-inner group (YRI), the Yangtze River front-outer group (YRO), the Zhejiang costa front-inner group (ZCI), and the Zhejiang coast front-outer group (ZCO), were compared to examine the differences in fish communities between the sides of the front. The results showed that there was a significant difference between YRI and YRO, suggesting that the front affected the community structure. There was no significant difference in fish communities between ZCI and ZCO, indicating that fronts could only hinder dispersal at high intensities. The difference between YRI and YRO possibly resulted from dramatic changes in temperature, salinity, and turbidity related to the front. Fronts also separated water masses with different environmental characteristics and thereby attracted fish to their optimal habitats. Overall, fronts appear to be ecologically significant for fish dispersal and community differentiation.

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来源期刊
Journal of Sea Research
Journal of Sea Research 地学-海洋学
CiteScore
3.20
自引率
5.00%
发文量
86
审稿时长
6-12 weeks
期刊介绍: The Journal of Sea Research is an international and multidisciplinary periodical on marine research, with an emphasis on the functioning of marine ecosystems in coastal and shelf seas, including intertidal, estuarine and brackish environments. As several subdisciplines add to this aim, manuscripts are welcome from the fields of marine biology, marine chemistry, marine sedimentology and physical oceanography, provided they add to the understanding of ecosystem processes.
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