Closing the oxygen mass balance in shallow coastal ecosystems
Closing the oxygen mass balance in shallow coastal ecosystems
复制标题
关闭浅海沿海生态系统中的氧气质量平衡
DOI:
10.1002/lno.11248
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发表时间:
2019
影响因子:
4.5
通讯作者:
Zimmerman, Richard C.
中科院分区:
文献类型:
--
作者:
Long, Matthew H.;Rheuban, Jennie E.;McCorkle, Daniel C.;Burdige, David J.;Zimmerman, Richard C.
The oxygen concentration in marine ecosystems is influenced by production and consumption in the water column and fluxes across both the atmosphere–water and benthic–water boundaries. Each of these fluxes has the potential to be significant in shallow ecosystems due to high fluxes and low water volumes. This study evaluated the contributions of these three fluxes to the oxygen budget in two contrasting ecosystems, aZostera marina(eelgrass) meadow in Virginia, U.S.A., and a coral reef in Bermuda. Benthic oxygen fluxes were evaluated by eddy covariance. Water column oxygen production and consumption were measured using an automated water incubation system. Atmosphere–water oxygen fluxes were estimated by parameterizations based on wind speed or turbulent kinetic energy dissipation rates. We observed significant contributions of both benthic fluxes and water column processes to the oxygen mass balance, despite the often‐assumed dominance of the benthic communities. Water column rates accounted for 45% and 58% of the total oxygen rate, and benthic fluxes accounted for 23% and 39% of the total oxygen rate in the shallow (~ 1.5 m) eelgrass meadow and deeper (~ 7.5 m) reef site, respectively. Atmosphere–water fluxes were a minor component at the deeper reef site (3%) but a major component at the shallow eelgrass meadow (32%), driven by diel changes in the sign and strength of atmosphere–water gradient. When summed, the measured benthic, atmosphere–water, and water column rates predicted, with 85–90% confidence, the observed time rate of change of oxygen in the water column and provided an accurate, high temporal resolution closure of the oxygen mass balance.
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DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
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DOI:
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发表时间:
2016
期刊:
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发表时间:
2014
期刊:
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--
作者:
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通讯作者:
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影响因子:
5.2
作者:
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通讯作者:
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DOI:
10.1002/lom3.10038
发表时间:
2015
期刊:
Limnology and Oceanography: Methods
影响因子:
--
作者:
M. Long;M. Charette;W. Martin;D. McCorkle
通讯作者:
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