Ecosystems

, Volume 4, Issue 7, pp 603–624 | Cite as

Phosphorus Biogeochemistry and the Impact of Phosphorus Enrichment: Why Is the Everglades so Unique?

  • Gregory B. Noe
  • Daniel L. Childers
  • Ronald D. Jones

Abstract

The Florida Everglades is extremely oligotrophic and sensitive to small increases in phosphorus (P) concentrations. P enrichment is one of the dominant anthropogenic impacts on the ecosystem and is therefore a main focus of restoration efforts. In this review, we synthesize research on P biogeochemistry and the impact of P enrichment on ecosystem structure and function in the Florida Everglades. There are clear patterns of increased P concentrations and altered structure and processes along nutrient-enrichment gradients in the water, periphyton, soils, macrophytes, and consumers. Periphyton, an assemblage of algae, bacteria, and associated microfauna, is abundant and has a large influence on phosphorus cycling in the Everglades. The oligotrophic Everglades is P-starved, has lower P concentrations and higher nitrogen–phosphorus (N:P) ratios, and has oxidized to only slightly reduced soil profiles compared to other freshwater wetland ecosystems. Possible general causes and indications of P limitation in the Everglades and other wetlands include geology, hydrology, and dominance of oxidative microbial nutrient cycling. The Everglades may be unique with respect to P biogeochemistry because of the multiple causes of P limitation and the resulting high degree of limitation.

Key words: Everglades; phosphorus; biogeochemistry; wetlands; ecosystem; nutrient cycling; oligotrophy; eutrophy. 

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Copyright information

© Springer-Verlag New York Inc. 2001

Authors and Affiliations

  • Gregory B. Noe
    • 1
  • Daniel L. Childers
    • 1
  • Ronald D. Jones
    • 1
  1. 1.Southeast Environmental Research Center, Florida International University, Miami, Florida 33199, USA; and

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