Coupled C, N, P, and O Biogeochemical Cycling at the Land-Ocean Interface

F. T. Mackenzie*, E. H. De Carlo, A. Lerman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

29 Scopus citations

Abstract

This chapter deals with the dynamics of the coupled biogeochemical cycles of carbon, nitrogen, phosphorus, and oxygen at the land-ocean interface and within the global coastal ocean. Future land-use changes will lead to increasing riverine fluxes of C, N, and P to the coastal ocean, augmented by atmospheric nitrogen loading of coastal environments. The excess nutrients will stimulate primary production and respiration/decomposition of this organic carbon and that brought in by rivers will lead to changes in the trophic status of coastal marine environments and to more environments exhibiting hypoxic and anoxic conditions. The coastal ocean is currently a net source of CO2 to the atmosphere but soon will switch to a sink. This switch coupled with increasing atmospheric deposition of N will lead to further acidification of coastal ocean waters. There is little doubt that unless C, N, and P anthropogenic fluxes from land are better managed in the future, proximal coastal ocean environments, including the estuarine and reef systems that are critical to fisheries, will be especially vulnerable to changes in their ecosystem dynamics.

Original languageEnglish (US)
Title of host publicationBiogeochemistry
PublisherElsevier Inc
Pages317-342
Number of pages26
Volume5
ISBN (Electronic)9780080878850
ISBN (Print)9780123747112
DOIs
StatePublished - Mar 6 2012

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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