Estimating pelagic primary production in lakes: Comparison of 14C incubation and free‐water O2 approaches
Estimating pelagic primary production in lakes: Comparison of 14C incubation and free‐water O2 approaches
复制标题
估算湖泊中上层初级生产力:14C 孵化法和自由水 O2 方法的比较
DOI:
10.1002/lom3.10471
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Vanni, Michael J.
中科院分区:
文献类型:
--
作者:
Lottig, Noah R.;Phillips, Joseph S.;Batt, Ryan D.;Scordo, Facundo;Williamson, Tanner J.;Carpenter, Stephen R.;Chandra, Sudeep;Hanson, Paul C.;Solomon, Chistopher T.;Vanni, Michael J.
Historically, estimates of pelagic primary production in lake ecosystems were made by measuring the uptake of carbon‐14 (14C)‐labeled inorganic carbon in samples incubated under laboratory or in situ conditions. However, incubation approaches are increasingly being replaced by methods that analyze diel changes in high‐frequency in situ data such as free‐water dissolved oxygen (O2). While there is a rich literature on the comparison of approaches for estimating primary production using incubations (e.g.,14C and O2bottle experiments), as well for approaches using high‐frequency data (e.g., diel O2and CO2metabolism models), there are few direct comparisons of14C incubations and free‐water O2approaches for estimating primary production. We used 20 lake‐years of concurrent measurements of primary production quantified from high‐frequency free‐water O2data and14C incubations in four different lakes (4–7 years per lake) to compare these different approaches. Across all lakes, 61% of the14C production estimates were within the 95% credible intervals of the free‐water O2production estimates. Error‐in‐variable regressions support the assumption that14C methods estimate a production value between gross primary production and net primary production and the bottle effect is constant across the entire range of production values considered here. There was little evidence that daily pelagic, epilimnetic estimates of primary production differed substantially based on the selection of free‐water O2or14C approaches in these lakes during summer stratified conditions.
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DOI:
--
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