Climate change: Links to global expansion of harmful cyanobacteria
Climate change: Links to global expansion of harmful cyanobacteria
复制标题
DOI：
10.1016/j.watres.2011.08.002
复制
发表时间：
2012-04-01
期刊：
影响因子：
12.8
通讯作者：
Paul, Valerie J.
中科院分区：
文献类型：
--
作者：
Paerl, Hans W.;Paul, Valerie J.
蓝细菌是地球上最古老的（类似于3.5万年）释氧生物，它们对塑造我们现代的生物圈产生了重大影响。相反，生物圈环境扰动，包括营养物富集和气候变化（例如全球变暖、水文变化、热带气旋频率和强度增加、更严重和持续的干旱），强烈影响淡水和海洋生态系统中的蓝藻生长和水华爆发潜力。我们研究了人类和气候控制的有害（有毒，缺氧，破坏食物网）水华形成蓝藻（蓝藻）沿着淡水海洋连续。这些变化可能会协同作用，以促进蓝藻的优势和持久性。这种协同作用是一个艰巨的挑战，水质，供水和渔业管理人员，因为水华的潜力和控制可能会改变，以应对同期的变化，在热和水文制度。在内陆沃茨，在减少营养物输入既不可行也不可能的系统中，可能需要改变水文，包括加强垂直混合，如果供水允许，增加冲洗（减少停留时间）。除非在特殊情况下，食草动物不太可能成功地控制氰基有害生物。总的来说，在一个更温暖、多风暴和更极端的世界里，更严格的营养管理可能是长期控制氰藻华的最可行和最实用的方法。(C)2011爱思唯尔有限公司保留所有权利。
Cyanobacteria are the Earth's oldest (similar to 3.5 bya) oxygen evolving organisms, and they have had major impacts on shaping our modern-day biosphere. Conversely, biospheric environmental perturbations, including nutrient enrichment and climatic changes (e.g. global warming, hydrologic changes, increased frequencies and intensities of tropical cyclones, more intense and persistent droughts), strongly affect cyanobacterial growth and bloom potentials in freshwater and marine ecosystems. We examined human and climatic controls on harmful (toxic, hypoxia-generating, food web disrupting) bloom-forming cyanobacteria (CyanoHABs) along the freshwater to marine continuum. These changes may act synergistically to promote cyanobacterial dominance and persistence. This synergy is a formidable challenge to water quality, water supply and fisheries managers, because bloom potentials and controls may be altered in response to contemporaneous changes in thermal and hydrologic regimes. In inland waters, hydrologic modifications, including enhanced vertical mixing and, if water supplies permit, increased flushing (reducing residence time) will likely be needed in systems where nutrient input reductions are neither feasible nor possible. Successful control of CyanoHABs by grazers is unlikely except in specific cases. Overall, stricter nutrient management will likely be the most feasible and practical approach to long-term CyanoHAB control in a warmer, stormier and more extreme world. (C) 2011 Elsevier Ltd. All rights reserved.