Nitrogen and phosphorus exchange among tropical coastal ecosystems

Stephen E. Davis, Diego Lirman, Jeffrey R. Wozniak

Research output: Chapter in Book/Report/Conference proceedingChapter

13 Scopus citations

Abstract

The concentration and flux of nitrogen (N) and phosphorus (P) through mangrove wetlands, seagrass meadows, and coral reef habitats are mediated by a wide range of hydrodynamic and chemical pathways determined by both natural and anthropogenic drivers. The direct proximity of these coastal habitats to burgeoning urban centers makes them quite susceptible to excessive nutrient loading, subsequent land-use impacts, the related effects of eutrophication and of course the associated loss of ecosystem services. For this reason mangrove, seagrass, and coral reef ecosystems are among the most threatened ecosystems in the tropics. While quantifying the exchange of materials between coastal wetlands and nearshore waters has been the focus of estuarine research for nearly half a century, a concerted effort to understand the net exchange of N and P across these habitats has only begun in the last 20 years. Furthermore, attempts to better understand the interplay of N and P cycles specifically between each of these three habitats has been all but nonexistent. The role mangrove and seagrass ecosystems play in buffering nearshore coral habitats from land-based influences remains a topic of great debate. Critical to understanding the nutrient dynamics between these ecosystems is defining the frequency and magnitude of connectivity events that link these systems together both physically and biogeochemically. In this chapter we attempt to address both N and P water column concentrations and system-level exchanges (i.e., water-mediated fluxes and nutrient loading). We consider how the interactions of N and P between these systems vary with geomorphology, hydrography, seasonal programming, and human influences.

Original languageEnglish (US)
Title of host publicationEcological Connectivity among Tropical Coastal Ecosystems
PublisherSpringer Netherlands
Pages9-43
Number of pages35
ISBN (Print)9789048124053
DOIs
StatePublished - Dec 1 2009

Keywords

  • Coral reef
  • Flux
  • Mangrove
  • Nutrient
  • Seagrass

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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    Davis, S. E., Lirman, D., & Wozniak, J. R. (2009). Nitrogen and phosphorus exchange among tropical coastal ecosystems. In Ecological Connectivity among Tropical Coastal Ecosystems (pp. 9-43). Springer Netherlands. https://doi.org/10.1007/978-90-481-2406-0_2