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海洋持续酸化 研究称全体生物都会因此遭殃

2017-10-24 06:55:56   

一项超过250名科研人员参与、历时8年完成的综合性研究发现,受人类现代社会二氧化碳排放量增加影响,海洋正日益酸化,所有海洋生物、特别是其幼体,都会因此遭殃。

据英国广播公司22日报道,此次综合性研究自2009年开始,研究人员已将相关的350多篇论文概括成研究成果报告《海洋酸化的生物影响》,计划于11月在德国波恩举行的年度会议上,提交给各国气候变化谈判专家。

研究人员指出,即便部分海洋生物是海水酸碱度变化的直接受益者,它们也会因整个食物网络的变化而间接受害。

据报道,海洋酸化主要源于化石燃料排放的二氧化碳溶解在海水中,致使其pH值降低。自18世纪后半期工业革命以来,地球表面海水的pH值已从8.2降至8.1。

更严重的是,研究发现气候变化、环境污染、沿海经济活动、过度捕鱼以及农业用化肥等因素会导致海水酸化程度加剧。

研究报告的第一作者、德国亥姆霍茨环境研究中心海洋生物学教授乌尔夫·黎贝塞尔介绍说,海洋酸化会影响全种属的海洋生物,只是程度不一。例如,“蛤蜊和海螺比龙虾和蟹等甲壳类动物更敏感”,“生物在幼体阶段受影响程度高于其成体阶段”。(海洋)【新华社微特稿】

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