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Acid test for marine biodiversity

机译:海洋生物多样性的酸性测试

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摘要

Rising levels of atmospheric carbon dioxide lead to acidification of the oceans. A site in the Mediterranean, naturally carbonated by under-sea volcanoes, provides clues to the possible effects on marine ecosystems. Much of the carbon dioxide released into Earth's atmosphere by human activities is absorbed by the oceans. When dissolved in water, CO_2 forms carbonic acid. Anthropogenic carbon emissions are therefore leading to global acidification of the surface ocean, with uncertain consequences for marine life. On page 96 of this issue, Hall-Spencer et aV describe conditions off the island of Ischia near Naples, Italy (Fig. 1). Here, the release of CO_2 from under-sea volcanoes causes local acidification of sea water by as much as 1.5 pH units below the average ocean pH of 8.1-8.2. Although surrounded by a diverse rocky shore community with abundant calcareous organisms, the CO_2 venting site is impoverished in sea urchins and coralline algae, and is bare of stony corals. The shells of snails found in this area are weakened, and snail juveniles are completely absent. Are these changes a foretaste of the fate of the oceans in general?
机译:大气中二氧化碳的水平上升导致海洋酸化。地中海的一个地点,由海底火山自然碳酸盐化,提供了对海洋生态系统可能产生影响的线索。人类活动释放到地球大气中的二氧化碳大部分被海洋吸收。当溶于水时,CO_2形成碳酸。因此,人为碳排放正在导致全球表层海洋酸化,对海洋生物造成不确定的后果。在本期杂志的第96页上,Hall-Spencer等人描述了意大利那不勒斯附近伊斯基亚岛附近的情况(图1)。在这里,海底火山释放的CO_2导致海水局部酸化,比平均海洋pH值8.1-8.2低1.5个pH单位。尽管周围有钙质生物丰富的多岩石海岸社区,但CO_2的排放地点在海胆和珊瑚藻中贫瘠,并且没有石质珊瑚。在该区域发现的蜗牛壳变弱,并且完全没有蜗牛幼虫。这些变化是否预示着整个海洋的命运?

著录项

  • 来源
    《Nature》 |2008年第7200期|p.46-47|共2页
  • 作者

    Ulf Riebesell;

  • 作者单位

    Department of Neurological Surgery, UCSF Helen Diller Comprehensive Cancer Center, Biomedical Sciences Program, University of California, San Francisco, San Francisco, California 94143-0875, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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