全球13类主要滨海生态系统分布情况首次发布|亚洲一区二区三区

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  今天(9月24日),自然资源部和世界自然保护联盟(IUCN)联合发布《全球滨海生态系统状况报告》,该报告是全球首次系统性评估滨海生态系统状况的重要成果。

  《报告》显示,全球13类主要滨海生态系统分布呈现显著的地带性特征:热带生态区分布了全球60%以上的河口与泥质岸线、97%的红树林、88%的海草床以及99%的珊瑚礁,温带生态区分布了近50%的基岩和砂质岸线、69%的滨海盐沼以及多数的海藻森林与软体动物礁,潮下带-陆架岩礁、潮下带-陆架砂质海床、潮下带-陆架泥质海床在热带、温带等生态区均有分布。

  过去半个多世纪以来,全球滨海生态系统经历了不同程度的退化:海草床、珊瑚礁、软体动物礁与海藻森林退化最为严重,年均净损失率超过1%。红树林和滨海盐沼存在一定退化,砂质海岸与泥质海岸超50%处于淤积或侵蚀状态。依赖这些生态系统的生物群落种群数量下降,多数受威胁比例超10%,海鸟、海洋无脊椎动物、海龟受威胁比例超30%。

  《报告》分析发现,滨海城镇化、气候变化以及渔业资源开发等是导致滨海生态系统退化的主要因素,同时农业、海洋矿产与能源开发、海洋交通运输等活动也会给滨海生态系统带来干扰。随着滨海地区社会经济的持续发展,若不采取有效干预措施,这些影响将进一步加剧。

  全球滨海区域已有12.4%被纳入保护范围,但整体保护仍需加强,典型生态系统保护有待进一步提高;修复实践已在多国展开,但规模不足,且受制于技术、资金和政策;许多国家和地区逐渐从“重开发、轻保护”向“生态优先、科学利用”转变,但生态保护约束仍显不足,陆海统筹治理、渔业资源恢复、绿色航运技术等仍需系统推进。

  (总台央视记者 王凯博 张琪)

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