Supporting Evidence for the "Ten-Year Fishing Ban": Different Modes of Fishing and Pollution Induce a Fish Diversity Decline between the Pearl River and Its Estuary

文献类型： 外文期刊

第一作者： Mai, Yongzhan

作者： Mai, Yongzhan;Li, Haiyan;Zeng, Yanyi;Lai, Zini;Li, Xinhui;Li, Jie;Peng, Songyao;Wang, Xuesong;Tie, Hang;Cai, Yajie;Chen, Huiming;Peng, Mijun;Wang, Yunfan

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关键词： ten-year fishing ban; Pearl River; stable isotopes; fishing; pollution

期刊名称：ACS ES&T WATER （ 影响因子：5.3； 五年影响因子：5.3 ）

ISSN：

年卷期： 2023 年 3 卷 8 期

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收录情况： SCI

摘要： To settle the emerging debate on whether a "ten-yearfishingban" is too long or an annual fishing moratorium is enoughfor fish resource restoration in the Yangtze River, a long-term comparisonbetween the 1980s and the 2020s in the Pearl River was performed.Significant declines in fish biodiversity were determined among boththe Pearl River and its estuary over the past decades. The trophiclevel increased from 4 to 5 in the estuary, whereas it remained at4 in the Pearl River. Interestingly, an opposite trend in interspeciesnetworks of fish was observed between the Pearl River and its estuary.A reduced density and increased links were detected in the Pearl Riveras its interspecies networks became complex, which was in contrastto that in the estuary. Furthermore, fishing and pollution were bothconfirmed to participate in the fish biodiversity decline in the PearlRiver, whereas pollution was the dominant factor inducing the fishbiodiversity decline in the estuary. Our case indicated that an annualfishing moratorium is not enough for fish resource restoration andsupports the strategy of "ten-year fishing ban". Moreover,pollution should also be brought under control so that we can facilitatefish resource restoration. Areal case supports the "ten-year fishing ban"by uncovering fishing and pollution inducing fish diversity declinein large river ecosystems.

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