Long-term trends in methane flux from the sediments of Onondaga Lake, NY: Sediment diagenesis and impacts on dissolved oxygen resources
Abstract
Long-term trends in diffusive and ebullitive fluxes of methane (CH 4 ) from the sediments of hypereutrophic Onondaga Lake, New York, are documented for the 1989 to 2004 interval, following an abrupt reduction in deposition of particulate organic carbon. Assessments are based on June to October monitoring of dissolved CH 4 in the water column and ebullitive gas collected above the sediments. Reductions in overall CH 4 flux were first observed in ebullition, which decreased abruptly from 6 mmol m -2 d -1 before 1992 to 1 mmol m -2 d -1 thereafter. The contribution of ebullition to total CH 4 flux decreased from 35 to 9 % over the same period. Substantial reductions in dissolved CH 4 flux were first observed approximately two years after the major reductions in ebullition. Sediment release of dissolved CH 4 decreased 38 %, from an average rate of 11.7 mmol m -2 d -1 for the 1989 to 1991 interval, to 7.3 mmol m -2 d -1 for the 2002 to 2004 interval. The decrease in CH 4 flux was driven by an abrupt decrease in the deposition of particulate organic carbon into the hypolimnion starting in 1987. The magnitude of the decrease in CH4 flux is consistent with previously documented decreases in primary production, organic carbon deposition, and the areal hypolimnetic oxygen deficit. The time course of the decrease in CH 4 flux reflects sediment diagenesis processes. Oxidation of large (3.3 - 8.2 x 10 6 mol) hypolimnetic accumulations of CH 4 during the fall mixing period contributed sign…
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The substrates for methanogenesis are older and more recalcitrant.
“Accordingly, the substrates for methanogenesis are older and more recalcitrant (Matthews et al. 2005).”
From Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York (2008) · cites this paper as Matthews et al. 2005
The ebullitive component decreased from 35 to 9% of the CH4 flux from before to after 1992.
“The ebullitive component decreased from 35 to 9% of the CH4 flux from before to after 1992 (Fig. 7g; Matthews et al. 2005).”
From Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York (2008) · cites this paper as Matthews et al. 2005
The general AHOD pattern following closure was similar to that observed for CH4 accumulation rates and the CH4 oxygen demand through 2002.
“The general AHOD pattern following closure was similar to that observed for CH4 accumulation rates (Matthews et al. 2005, Matthews and Effler 2006a,) and the CH4 oxygen demand (Fig. 7h) through 2002.”
From Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York (2008) · cites this paper as Matthews et al. 2005
The flux of the dissolved fraction, and its annual maximum DO demand, decreased in a generally progressive manner following the decrease in ebullition.
“The flux of the dissolved fraction, and its annual maximum DO demand (Fig. 7h), decreased in a generally progressive manner following the decrease in ebullition (Matthews et al. 2005).”
From Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York (2008) · cites this paper as Matthews et al. 2005
The time course of the decrease in CH4 flux, and the associated DO demand, following the decrease in POCdf depicts feedback from sediments deposited during earlier more productive years.
“The time course of the decrease in CH4 flux, and the associated DO demand (Fig. 7h), following the decrease in POCdf (Fig. 7e), depicts feedback from sediments deposited during earlier more productive years (Matthews et al. 2005).”
From Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York (2008) · cites this paper as Matthews et al. 2005
Interannual variations in the hypolimnetic accumulation rate of CH4 explained 46% (p = 0.01) of the variations in AHOD over the 1989 to 2002 interval.
“Matthews et al. (2005) reported that interannual variations in the hypolimnetic accumulation rate of CH4 explained 46% (p = 0.01) of the variations in AHOD over the 1989 to 2002 interval.”
From Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York (2008) · cites this paper as Matthews et al. 2005
Interannual variations in SO4 2- reduction largely reflect year-to-year differences in the downward flux of particulate organic material (primary production), whereas diagenesis-based changes in the CH4 pool have been gradual by comparison.
“Thus, interannual variations in SO 4 2reduction largely reflect year-to-year differences in the downward flux of particulate organic material (primary production), whereas the diagenesis-based changes in the CH 4 pool (Matthews et al. 2005) have been gradual by comparison (Fig. 7h).”
From Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York (2008) · cites this paper as Matthews et al. 2005
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Implications of redox processes for the rehabilitation of an urban lake, Onondaga Lake, New York
Effler, S. W., & Matthews, D. A. (2008) · Lake and Reservoir Management · doi:10.1080/07438140809354056 · Cited by 26 · see citing works
Self-citation
- Authors
- Matthews, D. A., Effler, S. W., & Matthews, C. M.
- ORCID
- Effler, Steven W.
- Venue
- Archiv für Hydrobiologie
- Publisher
- Schweizerbart
- Published
- 2005-09-01
- Volume
- 163
- Issue
- 4
- Pages
- 435-462
- ISSN
- 0003-9136 (ISSN-L)
- OpenAlex
- W2065026735
- Cited by
- 24
- References
- 0
- Citations by year
- 2025: 3 · 2023: 1 · 2022: 5 · 2020: 1 · 2016: 2 · 2015: 1 · 2014: 1 · 2013: 1 · 2012: 1
- FWCI
- 1.10
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Archiv für Hydrobiologie (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Methane Hydrates and Related Phenomena
- Physical Sciences › Environmental Science › Ecology › Peatlands and Wetlands Ecology
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
- Keywords
- methane flux, Onondaga Lake, sediment diagenesis, ebullition, dissolved methane, hypereutrophic lakes, methane oxidation, dissolved oxygen, long-term trends, lake sediments
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