Imbalance of plankton community metabolism in eutrophic Lake Taihu, China

Liu, Xia; Wu, Qinglong L.; Chen, Yuwei; Dokulil, Martin T.

doi:10.1016/j.jglr.2011.09.005

Cited by 10 publications

(10 citation statements)

References 46 publications

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“…For example, mean annual GPP and R rates for Muskegon Lake were 126 ± 26 and 62 ± 11 µg C l . Although GPP rates for Muskegon Lake fall within the range of GPP rates reported by Liu et al (2011), mean annual GPP rates for Muskegon Lake were lower, at 126 ± 26 µg C l −1 d −1…”

Section: Muskegon Lake Metabolism Rate Comparisons To Other Aquatic Esupporting

confidence: 52%

See 1 more Smart Citation

Year-round measures of planktonic metabolism reveal net autotrophy in surface waters of a Great Lakes estuary

Defore¹,

Weinke²,

Lindback³

et al. 2016

Aquat. Microb. Ecol.

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Section: Muskegon Lake Metabolism Rate Comparisons To Other Aquatic Esupporting

confidence: 52%

“…, compared to 254 µg C l −1 d −1 reported by Liu et al (2011), again pointing to the composition of the DOM pool as a critical factor regulating the cycling of carbon in Muskegon Lake.…”

Section: Muskegon Lake Metabolism Rate Comparisons To Other Aquatic Ementioning

confidence: 65%

Year-round measures of planktonic metabolism reveal net autotrophy in surface waters of a Great Lakes estuary

Defore¹,

Weinke²,

Lindback³

et al. 2016

Aquat. Microb. Ecol.

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“…[ 3 , 18 , 19 , 20 , 21 ]. Although recently there have been numerous advances in the study of ecosystem metabolism [ 2 , 22 ], the majority of this research has been conducted in temperate waters, with little in subtropical and tropical waters [ 2 ], and even fewer studies examine eutrophic subtropical shallow lakes, where sunlight can reach the benthal layer and water column productivity is high [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Temporal Dynamics and Drivers of Ecosystem Metabolism in a Large Subtropical Shallow Lake (Lake Taihu)

Xiao

Yang

et al. 2015

IJERPH

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With continuous measurements of dissolved oxygen, temperature, irradiance, and wind speed, as well as frequent measurements of pH, oxidation-reduction potential, and algal chlorophyll, temporal dynamics and drivers of ecosystem metabolism in a large nutrient-rich shallow lake (Lake Taihu) are tested in this study. The results show that the dissolved oxygen concentrations in the lake fluctuate annually. They increase in autumn and winter with a peak value of 14.19 mg·L−1 in winter, and decrease in spring and summer with a trough value of 6.40 mg·L−1 in summer. Gross primary production (GPP), ecosystem respiration (R), and net ecosystem production (NEP) increase in summer, with their peak values in late summer and autumn, and decrease in winter and spring. Mean values of GPP, R and NEP are 1.75 ± 0.06 (Mean ± SE), 1.52 ± 0.05, and 0.23 ± 0.03 g O2 m−3·d−1, respectively. It is also found that water temperature and surface irradiance are the best predictors of GPP and R, while water temperature (wind speed) has a significantly positive (negative) relationship with NEP. The findings in this study suggest that Lake Taihu is a net autotrophic ecosystem, and water temperature and surface irradiance are the two important drivers of lake metabolism.

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“…Bacterial activity at seston is usually considered to be negligible in oligotrophic lakes (Lee et al ., ), but may contribute considerably to BR in eutrophic systems, where the number of seston‐associated bacteria and their metabolic activity are often much higher than those of free‐living bacteria (Grossart and Simon, , Kiersztyn et al ., ). Field measurements of community plankton respiration in the eutrophic lake Taihu (Liu et al ., ) and a summed component ecosystem modelling approach for a eutrophic Estonian lake (Cremona et al ., ) provide support that heterotrophic respiration can exceed primary production in eutrophic lakes under specific conditions. High turbidity and poor light climate can contribute to temporal heterotrophy in eutrophic lakes (Liu et al ., ) and the absence of large zooplankton grazers due to cyanobacteria dominance may lead to a community of inefficient carbon consumers with relatively high respiration rates (Cremona et al ., ).…”

Section: Discussionmentioning

confidence: 99%

“…Field measurements of community plankton respiration in the eutrophic lake Taihu (Liu et al ., ) and a summed component ecosystem modelling approach for a eutrophic Estonian lake (Cremona et al ., ) provide support that heterotrophic respiration can exceed primary production in eutrophic lakes under specific conditions. High turbidity and poor light climate can contribute to temporal heterotrophy in eutrophic lakes (Liu et al ., ) and the absence of large zooplankton grazers due to cyanobacteria dominance may lead to a community of inefficient carbon consumers with relatively high respiration rates (Cremona et al ., ). In Vombsjön, shallow secchi depth and frequent cyanobacteria blooms have the potential to limit autotrophic activity to a relatively small area compared to the whole lake volume, implicating that the contribution of BR to community respiration could be higher than generally assumed for a eutrophic lake.…”

Section: Discussionmentioning

confidence: 99%

In situ plankton community respiration measurements show low respiratory quotients in a eutrophic lake

Münzner

Berggren²

2019

Environmental Microbiology

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Summary Planktonic community respiration is an important carbon cycling process, typically quantified by converting measured values of dissolved O2 consumption rates into CO2 production rates assuming a respiratory quotient of 1 (RQ = CO2 per O2 by moles). However, the true variability in planktonic RQs between different aquatic ecosystems is poorly understood. We conducted in situ RQ measurements in a eutrophic lake dominated by algal‐derived substances and found that RQs were significantly below 1. In fact, many RQ values were extremely low (0.2–0.6), below theoretical RQs for oxidation of algal organic matter substrates (0.7–0.8), suggesting that other factors than substrate control need to be considered to understand the RQ. This view was further supported by lack of correlations between RQ and microbial variables known to be strongly substrate dependent, including bacterial growth efficiency and the functional capacity of the bacterioplankton community to degrade different compounds. Based on the measured dynamics in methane and nutrient pools, we discuss that methane oxidation and nitrification likely occurred in the lake, contributing to the unusually low RQs. Our findings demonstrate that planktonic RQs in productive lakes can systematically be below 1, suggesting that CO2 emissions from these lakes may currently be overestimated.

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Imbalance of plankton community metabolism in eutrophic Lake Taihu, China

Cited by 10 publications

References 46 publications

Year-round measures of planktonic metabolism reveal net autotrophy in surface waters of a Great Lakes estuary

Year-round measures of planktonic metabolism reveal net autotrophy in surface waters of a Great Lakes estuary

Temporal Dynamics and Drivers of Ecosystem Metabolism in a Large Subtropical Shallow Lake (Lake Taihu)

In situ plankton community respiration measurements show low respiratory quotients in a eutrophic lake

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