Climate change and the potential spreading of marine mucilage and microbial pathogens in the Mediterranean Sea.
Climate change and the potential spreading of marine mucilage and microbial pathogens in the Mediterranean Sea.
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DOI：
10.1371/journal.pone.0007006
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发表时间：
2009-09-16
期刊：
影响因子：
3.7
通讯作者：
Pusceddu A
中科院分区：
文献类型：
--
作者：
Danovaro R;Fonda Umani S;Pusceddu A
海洋雪（具有胶体性质的小无定形聚集体）存在于世界上所有的海洋中。地表水变暖以及随之而来的水柱稳定性的增加有利于海洋雪合并成海洋粘液，这是一种短暂和极端的栖息地。海洋粘液是环境条件改变的水生系统的特征。我们通过分子技术研究了黏液内和周围海水中的病毒和原核生物，以研究黏液承载新的微生物多样性和/或传播海洋疾病的潜力。我们发现，海洋粘液含有大量的、出乎意料的独特微生物多样性，并承载了周围海水中不存在的致病物种。我们还调查了过去200年中气候变化与地中海粘液爆发频率之间的关系，发现在过去20年中，粘液爆发的数量几乎呈指数增长。黏液爆发频率的增加与温度异常密切相关。我们得出结论，地中海粘液的扩散与气候驱动的海面变暖有关。这种粘液可以作为广泛海洋地区微生物多样性的控制因素，并可能作为特定微生物的载体，从而增加致病菌的传播。
Marine snow (small amorphous aggregates with colloidal properties) is present in all oceans of the world. Surface water warming and the consequent increase of water column stability can favour the coalescence of marine snow into marine mucilage, large marine aggregates representing an ephemeral and extreme habitat. Marine mucilage characterize aquatic systems with altered environmental conditions. We investigated, by means of molecular techniques, viruses and prokaryotes within the mucilage and in surrounding seawater to examine the potential of mucilage to host new microbial diversity and/or spread marine diseases. We found that marine mucilage contained a large and unexpectedly exclusive microbial biodiversity and hosted pathogenic species that were absent in surrounding seawater. We also investigated the relationship between climate change and the frequency of mucilage in the Mediterranean Sea over the last 200 years and found that the number of mucilage outbreaks increased almost exponentially in the last 20 years. The increasing frequency of mucilage outbreaks is closely associated with the temperature anomalies. We conclude that the spreading of mucilage in the Mediterranean Sea is linked to climate-driven sea surface warming. The mucilage can act as a controlling factor of microbial diversity across wide oceanic regions and could have the potential to act as a carrier of specific microorganisms, thereby increasing the spread of pathogenic bacteria.
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影响因子：
10.4
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