了解肯尼亚海草消失的驱动因素:人口和渔业影响的证据

IF 2.5 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-07-24 DOI:10.1002/aqc.4229
Edward M. Mwikamba, Michael N. Githaiga, Mark Huxham, Robert A. Briers
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引用次数: 0

摘要

海草生态系统对支持生物多样性至关重要,也是重要的渔场。遗憾的是,全球海草覆盖率正在下降。在肯尼亚,海草覆盖率每年下降约 1.6%,但原因不明。本研究调查了肯尼亚海岸线海草减少的可能人为因素。研究利用有关人口增长、叶绿素 α 变化趋势、住房和道路密度的卫星数据和大尺度地理数据,探讨它们对整个海岸线海草覆盖率下降的影响。直接调查了围网和篮子诱捕对海草的影响。2000 年至 2016 年间,每 25 平方公里海草覆盖面积平均损失 1.9 平方公里,人口增长与海草减少之间存在微弱但显著的关系,损失集中在人口密度最高的地区。与其他地方的研究不同,没有证据表明富营养化与海草减少有关,这支持了海草减少与捕鱼等直接人为影响有关的观点。一项现场实验显示,一次围网捕捞导致捕捞区域内的海草覆盖率大幅下降了 8.3%,而篮式诱捕则没有观察到明显变化。这些发现支持了肯尼亚和其他非洲国家海草减少是人为因素造成的、与捕捞压力有关的证据,并支持限制在海草区使用围网的现有努力。了解非洲海草生态系统的现状、变化和变化驱动因素,对于制定有效的国家和地方海草保护计划以及履行有关海草保护的国际承诺至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Understanding the drivers of seagrass loss in Kenya: Evidence for the impacts of population and fishing

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来源期刊
Aquatic Conservation-Marine and Freshwater Ecosystems
Aquatic Conservation-Marine and Freshwater Ecosystems 环境科学-海洋与淡水生物学
CiteScore
5.50
自引率
4.20%
发文量
143
审稿时长
18-36 weeks
期刊介绍: Aquatic Conservation: Marine and Freshwater Ecosystems is an international journal dedicated to publishing original papers that relate specifically to freshwater, brackish or marine habitats and encouraging work that spans these ecosystems. This journal provides a forum in which all aspects of the conservation of aquatic biological resources can be presented and discussed, enabling greater cooperation and efficiency in solving problems in aquatic resource conservation.
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