Journal
ESTUARIES AND COASTS
Volume 36, Issue 1, Pages 158-173Publisher
SPRINGER
DOI: 10.1007/s12237-012-9553-4
Keywords
pH; Dissolved oxygen; Eutrophication; Screening tool; Irish estuaries and coastal waters
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Measurements of pH and dissolved oxygen saturation in summer from 90 Irish estuaries and coastal bays were used to develop a simple index of trophic state. The index is based on the assumption that large fluctuations in both these variables are likely to be a characteristic feature of eutrophication. In this paper, we use a simple index to capture the relative variation in both pH and dissolved oxygen saturation in each water body during a period of 3 years. We show that the index is in good agreement with other trophic status schemes and strongly correlated with parameters indicative of trophic state such as chlorophyll a and biochemical oxygen demand. We conclude that the index could be used as a simple screening tool to group individual water bodies into broad categories that reflect their trophic state.
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