Delving deeper

Metabolic processes in the metalimnion of stratified lakes

Darren P. Giling, Peter A. Staehr, Hans Peter Grossart, Mikkel René Andersen, Bertram Boehrer, Carmelo Escot, Fatih Evrendilek, Lluís Gómez-Gener, Mark Honti, Ian D. Jones, Nusret Karakaya, Alo Laas, Enrique Moreno-Ostos, Karsten Rinke, Ulrike Scharfenberger, Silke R. Schmidt, Michael Weber, R. Iestyn Woolway, Jacob A. Zwart, Biel Obrador

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Many lakes exhibit seasonal stratification, during which they develop strong thermal and chemical gradients. An expansion of depth-integrated monitoring programs has provided insight into the importance of organic carbon processing that occurs below the upper mixed layer. However, the chemical and physical drivers of metabolism and metabolic coupling remain unresolved, especially in the metalimnion. In this depth zone, sharp gradients in key resources such as light and temperature co-occur with dynamic physical conditions that influence metabolic processes directly and simultaneously hamper the accurate tracing of biological activity. We evaluated the drivers of metalimnetic metabolism and its associated uncertainty across 10 stratified lakes in Europe and North America. We hypothesized that the metalimnion would contribute highly to whole-lake functioning in clear oligotrophic lakes, and that metabolic rates would be highly variable in unstable polymictic lakes. Depth-integrated rates of gross primary production (GPP) and ecosystem respiration (ER) were modelled from diel dissolved oxygen curves using a Bayesian approach. Metabolic estimates were more uncertain below the epilimnion, but uncertainty was not consistently related to lake morphology or mixing regime. Metalimnetic rates exhibited high day-to-day variability in all trophic states, with the metalimnetic contribution to daily whole-lake GPP and ER ranging from 0% to 87% and
Original languageEnglish
Pages (from-to)1288-1306
Number of pages19
JournalLimnology and Oceanography
Volume62
Issue number3
DOIs
Publication statusPublished - 1 May 2017
Externally publishedYes

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lakes
lake
ecosystem respiration
primary production
primary productivity
respiration
uncertainty
metabolism
epilimnion
ecosystem
dissolved oxygen
mixed layer
bioactive properties
stratification
organic carbon
heat
monitoring
carbon
resource
rate

Cite this

Giling, D. P., Staehr, P. A., Grossart, H. P., Andersen, M. R., Boehrer, B., Escot, C., ... Obrador, B. (2017). Delving deeper: Metabolic processes in the metalimnion of stratified lakes. Limnology and Oceanography, 62(3), 1288-1306. https://doi.org/10.1002/lno.10504
Giling, Darren P. ; Staehr, Peter A. ; Grossart, Hans Peter ; Andersen, Mikkel René ; Boehrer, Bertram ; Escot, Carmelo ; Evrendilek, Fatih ; Gómez-Gener, Lluís ; Honti, Mark ; Jones, Ian D. ; Karakaya, Nusret ; Laas, Alo ; Moreno-Ostos, Enrique ; Rinke, Karsten ; Scharfenberger, Ulrike ; Schmidt, Silke R. ; Weber, Michael ; Woolway, R. Iestyn ; Zwart, Jacob A. ; Obrador, Biel. / Delving deeper : Metabolic processes in the metalimnion of stratified lakes. In: Limnology and Oceanography. 2017 ; Vol. 62, No. 3. pp. 1288-1306.
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Giling, DP, Staehr, PA, Grossart, HP, Andersen, MR, Boehrer, B, Escot, C, Evrendilek, F, Gómez-Gener, L, Honti, M, Jones, ID, Karakaya, N, Laas, A, Moreno-Ostos, E, Rinke, K, Scharfenberger, U, Schmidt, SR, Weber, M, Woolway, RI, Zwart, JA & Obrador, B 2017, 'Delving deeper: Metabolic processes in the metalimnion of stratified lakes', Limnology and Oceanography, vol. 62, no. 3, pp. 1288-1306. https://doi.org/10.1002/lno.10504

Delving deeper : Metabolic processes in the metalimnion of stratified lakes. / Giling, Darren P.; Staehr, Peter A.; Grossart, Hans Peter; Andersen, Mikkel René; Boehrer, Bertram; Escot, Carmelo; Evrendilek, Fatih; Gómez-Gener, Lluís; Honti, Mark; Jones, Ian D.; Karakaya, Nusret; Laas, Alo; Moreno-Ostos, Enrique; Rinke, Karsten; Scharfenberger, Ulrike; Schmidt, Silke R.; Weber, Michael; Woolway, R. Iestyn; Zwart, Jacob A.; Obrador, Biel.

In: Limnology and Oceanography, Vol. 62, No. 3, 01.05.2017, p. 1288-1306.

Research output: Contribution to journalArticle

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T2 - Metabolic processes in the metalimnion of stratified lakes

AU - Giling, Darren P.

AU - Staehr, Peter A.

AU - Grossart, Hans Peter

AU - Andersen, Mikkel René

AU - Boehrer, Bertram

AU - Escot, Carmelo

AU - Evrendilek, Fatih

AU - Gómez-Gener, Lluís

AU - Honti, Mark

AU - Jones, Ian D.

AU - Karakaya, Nusret

AU - Laas, Alo

AU - Moreno-Ostos, Enrique

AU - Rinke, Karsten

AU - Scharfenberger, Ulrike

AU - Schmidt, Silke R.

AU - Weber, Michael

AU - Woolway, R. Iestyn

AU - Zwart, Jacob A.

AU - Obrador, Biel

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Many lakes exhibit seasonal stratification, during which they develop strong thermal and chemical gradients. An expansion of depth-integrated monitoring programs has provided insight into the importance of organic carbon processing that occurs below the upper mixed layer. However, the chemical and physical drivers of metabolism and metabolic coupling remain unresolved, especially in the metalimnion. In this depth zone, sharp gradients in key resources such as light and temperature co-occur with dynamic physical conditions that influence metabolic processes directly and simultaneously hamper the accurate tracing of biological activity. We evaluated the drivers of metalimnetic metabolism and its associated uncertainty across 10 stratified lakes in Europe and North America. We hypothesized that the metalimnion would contribute highly to whole-lake functioning in clear oligotrophic lakes, and that metabolic rates would be highly variable in unstable polymictic lakes. Depth-integrated rates of gross primary production (GPP) and ecosystem respiration (ER) were modelled from diel dissolved oxygen curves using a Bayesian approach. Metabolic estimates were more uncertain below the epilimnion, but uncertainty was not consistently related to lake morphology or mixing regime. Metalimnetic rates exhibited high day-to-day variability in all trophic states, with the metalimnetic contribution to daily whole-lake GPP and ER ranging from 0% to 87% and

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Giling DP, Staehr PA, Grossart HP, Andersen MR, Boehrer B, Escot C et al. Delving deeper: Metabolic processes in the metalimnion of stratified lakes. Limnology and Oceanography. 2017 May 1;62(3):1288-1306. https://doi.org/10.1002/lno.10504