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Temporal Dynamics of Fishing Affect the Biodiversity of Macrobenthic Epifaunal Communities in the Coastal Waters of Ningbo, East China Sea
Thalassas: An International Journal of Marine Sciences ( IF 0.7 ) Pub Date : 2020-08-27 , DOI: 10.1007/s41208-020-00253-5
Xun Liu , Yinong Wang , Haifeng Jiao , Chen Chen , Dong Liu , Huixiong Shi , Zhongjie You

Spatio-temporal patterns of macrobenthic epifaunal communities with fishing disturbances indicate that the fishing process directly leads to a decrease in diversity and substratum sediment homogenization. However, it has not yet been explored exclusively at the community reconstruction dynamic level with fishing changes over time. This study monitored the macrobenthic epifaunal communities during the implementation of a fishing moratorium policy in order to elucidate the fishing-driven variations in the macrobenthic epifaunal communities. Bottom trawl surveys were conducted before (BEF), during (DUR), and after (AFT) a summer fishing moratorium. During each survey, macrobenthic species and surface sediment samples were collected from two transects located at two different depths. The results showed that the communities in the DUR phase were undisturbed, while the communities were disturbed in both the BEF and AFT phases. Compared with the BEF and AFT phases, there was an abundance of peak spawning species as well as the impact on macrobenthic communities in relation to the lightened fishing disturbance, significant increases in species richness, abundance, and biomass were observed in the DUR phase. Prohibition of fishing during summer facilitates the resilience of macrobenthic communities by maximizing spawning and reducing bottom disturbance to larval, thereby enhancing overall fishery resources.



中文翻译:

捕捞的时间动态影响东海宁波沿海水域大型底栖动物群落的生物多样性

具有捕捞干扰的大型底栖表生动物群落的时空格局表明,捕捞过程直接导致多样性下降和基质沉积物均一化。但是,还没有专门在社区重建动态水平上探讨捕鱼随时间的变化。这项研究在暂停捕捞政策实施期间对大型底栖动物群落进行了监测,以阐明大型底栖动物群落中捕鱼驱动的变化。在夏季休渔期之前(BEF),期间(DUR)和之后(AFT)进行了底拖网调查。在每次调查期间,均从位于两个不同深度的两个样带收集了大型底栖动物物种和地表沉积物样本。结果表明,DUR阶段的社区不受干扰,而BEF和AFT阶段的社区均受到干扰。与BEF和AFT阶段相比,出现了高峰产卵物种,以及与减轻捕鱼干扰有关的对大型底栖动物群落的影响,在DUR阶段观察到物种丰富度,丰度和生物量显着增加。夏季禁止捕鱼,可通过最大化产卵并减少对幼虫的底部干扰,促进大型底栖动物群落的复原力,从而增强总体渔业资源。与减少的捕鱼干扰有关,有大量产卵高峰期物种以及对大型底栖动物群落的影响,在DUR阶段观察到物种丰富度,丰度和生物量显着增加。夏季禁止捕鱼,可通过最大化产卵并减少对幼虫的底部干扰,促进大型底栖动物群落的复原力,从而增强总体渔业资源。与减少的捕鱼干扰有关,有大量产卵高峰期物种以及对大型底栖动物群落的影响,在DUR阶段观察到物种丰富度,丰度和生物量显着增加。夏季禁止捕鱼,可通过最大化产卵并减少对幼虫的底部干扰,促进大型底栖动物群落的复原力,从而增强总体渔业资源。

更新日期:2020-08-27
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