Using primary productivity as an index of coastal eutrophication: the units of measurement matter
Using primary productivity as an index of coastal eutrophication: the units of measurement matter
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DOI：
10.1093/plankt/fbl061
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发表时间：
2006-10
影响因子：
2.1
通讯作者：
V. Smith
中科院分区：
文献类型：
--
作者：
V. Smith
富营养化是全球沿海海洋生态系统面临的一个严重的环境和经济问题。最近有人建议，在监测和评估沿海沃茨的生态状况时，必须测量初级生产力，因为初级生产力是富营养化的一个敏感和准确的指标。选择用于富营养化评估的初级生产力单位将是非常重要的，因为并非所有初级生产力的测量都随着水生肥力的变化而单调变化（甚至直接变化）。在评价沿海海洋生态系统的富营养化状况时，初级生产力的体积表示法（每单位体积海水的固碳率）可能是最敏感和最可靠的衡量标准。初级生产力的另一个潜在的措施，每单位叶绿素a（P：B Chl）的光饱和光合速率的比例，是不适合的水生生态系统的反应，营养丰富的评估。
Eutrophication is a serious environmental and economic problem in coastal marine ecosystems worldwide. It has recently been recommended that measurements of primary productivity, being a sensitive and accurate indicator of eutrophication, should be mandatory when monitoring and assessing the ecological status of coastal waters. The units of primary productivity chosen for eutrophication assessment will be very important because not all measures of primary productivity vary monotonically (or even straightforwardly) with changes in aquatic fertility. Volumetric expressions of primary productivity (rates of carbon fixation per unit volume of seawater) may prove to be the most sensitive and most reliable measures to use when evaluating the eutrophication status of coastal marine ecosystems. Another potential measure of primary productivity, the light-saturated rate of photosynthesis per unit Chlorophyll a (P:B Chl ) ratio, is unsuitable for the assessment of aquatic ecosystem responses to nutrient enrichment.