Cited by 26Aquatic Ecosystems and Phytoplankton DynamicsSoil and Water Nutrient DynamicsMarine and coastal ecosystems

A long-term record of epilimnetic phosphorus patterns in recovering Onondaga Lake, New York

Effler, Steven W. O'Donnell·2010·Fundamental and Applied Limnology

Abstract

A retrospective analysis for a 23 year (1987-2009) record of spectrophotometically determined forms of phosphorus (P) is presented for the epilimnion of Onondaga Lake, New York, a period over which it was trans- formed from severely culturally eutrophic to mesotrophic through reductions in point source inputs. Patterns of fi ve forms of P were evaluated, total P (TPe), total dissolved P (TDPe), soluble reactive P (SRPe), particulate P (PPe = TPe - TDPe) and dissolved organic P (DOPe = TDPe - SRPe) based on weekly observations from multiple epilim- netic depths for the April (spring turnover) - October (fall turnover) interval of each year. A 10-fold reduction in the effl uent concentration of the dominant source (TPMetro), made in several steps, caused dramatic decreases in summer average epilimnetic P concentrations, 6.8-fold for TPe, 4.8-fold for PPe, 14.9-fold for TDPe, 8.4-fold for DOPe, and 70-fold for SRPe, as well as improvements in common metrics of trophic state. Long-term patterns of summer average concentrations of each of these forms tracked the progression of TPMetro at an annual time step. Both short- and long-term patterns of in-lake concentrations, particularly for SRPe, support the position that the lake remained often nutrient-saturated through much of the record, but shifted to distinctly P limited in response to the most recent (2005) reduction in TPMetro. The diagnostic value of monitoring the dynamics of these forms of P at multiple time steps to track lake metabolism and features of the P cycle is demonstrated, including uptake of dissolved forms, effects of Daphnia metabolism, dynamics of phytoplankton uptake, and long-term responses to reductions in external loading. Evidence is presented that a noteworthy fraction of the PPe pool is associated with non-phytoplankton particulates.

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Crossref · 10.1127/1863-9135/2010/0177-0001

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Authors
Effler, S. W. O.
Corresponding author
Effler, Steven W. O'Donnell
Venue
Fundamental and Applied Limnology
Publisher
Schweizerbart
Published
2010-05-01
Volume
177
Issue
1
Pages
1-18
ISSN
1863-9135 (ISSN-L)
OpenAlex
W2030389602
Cited by
26
References
55
Citations by year
2021: 1 · 2020: 1 · 2017: 2 · 2016: 2 · 2015: 7 · 2014: 4 · 2013: 3 · 2012: 6
FWCI
2.34
Type
journal article
Language
en
Open access
closed
Locations
Fundamental and Applied Limnology / Archiv für Hydrobiologie (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Soil and Water Nutrient Dynamics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
Keywords
Onondaga Lake, phosphorus forms, epilimnion, soluble reactive phosphorus, dissolved organic phosphorus, particulate phosphorus, total dissolved phosphorus, trophic state, phosphorus cycling, lake metabolism

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