Phosphate oxygen isotopes within aquatic ecosystems: global data synthesis and future research priorities

Davies, C.L, Surridge, B.W.J and Gooddy, D.C (2014) 'Phosphate oxygen isotopes within aquatic ecosystems: global data synthesis and future research priorities.' Science of the Total Environment, 496. pp. 563-575. ISSN 0048-9697

Official URL: http://dx.doi.org/10.1016/j.scitotenv.2014.07.057

Abstract

The oxygen isotope ratio of dissolved inorganic phosphate (δ18Op) represents a novel and potentially powerful stable isotope tracer for biogeochemical research. Analysis of δ18Op may offer new insights into the relative importance of different sources of phosphorus within natural ecosystems. Due to the isotope fractionations that occur alongside the metabolism of phosphorus, δ18Op could also be used to better understand the intracellular and extracellular reaction mechanisms that control phosphorus cycling. In this review focussed on aquatic ecosystems, we examine the theoretical basis to using stable oxygen isotopes within phosphorus research. We consider the methodological challenges involved in accurately determining δ18Op, given aquatic matrices in which potential sources of contaminant oxygen are ubiquitous. Finally, we synthesise the existing global data regarding δ18Op in aquatic ecosystems, concluding by identifying four key areas for future development of δ18Op research. Through this synthesis, we seek to stimulate broader interest in the use of δ18Op to address the significant research and management challenges that continue to surround the stewardship of phosphorus.

Item Type: Article
Keywords: phosphorus, oxygen isotopes, eutrophication, freshwater, nutrient sources, metabolism
Divisions: College of Liberal Arts
Date Deposited: 20 Jun 2019 18:08
Last Modified: 24 Jun 2019 10:25
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