Occurrence and ecological implications of pyrophosphate in estuaries

Autor:	P. V. Sundareshwar, B. C. Jones, James T. Morris, H. J. Cohen, Perry J. Pellechia, Dwayne E. Porter
Rok vydání:	2001
Předmět:	Biogeochemical cycle geography geography.geographical_feature_category Ecology Aquatic ecosystem Phosphorus food and beverages chemistry.chemical_element Wetland Aquatic Science Oceanography chemistry Salt marsh Environmental science Ecosystem Phosphorus cycle Eutrophication
Zdroj:	Limnology and Oceanography. 46:1570-1577
ISSN:	0024-3590
Popis:	Loading of bioavailable phosphorus, traditionally measured as soluble reactive phosphorus (SRP), contributes to the eutrophication of aquatic ecosystems. However, polyphosphates are also bioavailable but escape detection by the standard method used for measuring SRP. 31P nuclear magnetic resonance spectrometric analysis of sediment extracts and enzymatic assay of surface waters reveal heretofore unreported presence of pyrophosphate (Ppi) in coastal wetlands. We show that the accumulation of Ppi (the smallest chemical form of polyphosphate) in coastal wetlands is related to human impact and can occur in quantities that exceed that of SRP. We further demonstrate that Ppi is readily utilized by microbes in coastal wetland sediments in the presence of nitrogen and carbon and can serve as a reservoir of orthophosphate. Thus, Ppi accumulation in estuaries will subsidize the in situ biogeochemical phosphorus cycle. This has important ecological implications for trophic responses and estuarine productivity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1dea7fd7dd682d9f1d1384dab1f75558 https://doi.org/10.4319/lo.2001.46.6.1570 Zobrazit plný text záznamu Plný text