Lake metabolism: Difference between revisions
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Lake metabolism represents the lake ecosystem's balance between carbon fixation (gross primary production) and biological carbon oxidation (ecosystem respiration)[1]. Lake metabolism includes the carbon fixation and oxidation from all organism within the lake, from bacteria to fishes.
Concept
Estimates of lake metabolism rely on the measurement of dissolved oxygen. Oxygen is produced through carbon fixation and consumed through carbon oxidation.
![{\displaystyle 6CO_{2}+6H_{2}O{\xrightarrow[{}]{light}}C_{6}H12O_{6}+6O_{2}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/53335e49c5a8e80bc29d012e7514a2294cb2da36)
![{\displaystyle C_{6}H12O_{6}+6O_{2}{\xrightarrow[{}]{}}6CO_{2}+6H_{2}O}](https://wikimedia.org/api/rest_v1/media/math/render/svg/109110b74467f33d3e4faaf9ce9fea43793ceacf)
Carbon fixation and biological oxygen production only occurs in the presence of light, while the consumption of oxygen occurs in both the presence and absence of light. Lake metabolism includes:
- GPP - gross photosynthesis
- R - total respiration
- - heterotrophic respiration
- - autotrophic respiration
- NEP - net ecosystem production = GPP - R
- NPP - net primary production = GPP -
Measurement techniques
Free-water dissolved oxygen
The free-water dissolved oxygen technique for estimating lake metabolism was first introduced in the 1950's[2], but was not widely used until the advancement of automated sensor technology[3][4]. Automated sensor technology enables measurement of dissolved oxygen during periods that are hard to measure manually such as during storms.
See also
References
- ^ Winslow, Luke A.; Zwart, Jacob A.; Batt, Ryan D.; Dugan, Hilary A.; Woolway, R. Iestyn; Corman, Jessica R.; Hanson, Paul C.; Read, Jordan S. (2016-01). "LakeMetabolizer: an R package for estimating lake metabolism from free-water oxygen using diverse statistical models". Inland Waters. 6 (4): 622–636. doi:10.1080/iw-6.4.883. ISSN 2044-2041.
{{cite journal}}: Check date values in:|date=(help) - ^ ODUM, HOWARD T. (1956-04). "Primary Production in Flowing Waters1". Limnology and Oceanography. 1 (2): 102–117. doi:10.4319/lo.1956.1.2.0102. ISSN 0024-3590.
{{cite journal}}: Check date values in:|date=(help)CS1 maint: unflagged free DOI (link) - ^ Cole, Jonathan J.; Pace, Michael L.; Carpenter, Stephen R.; Kitchell, James F. (2000-12). "Persistence of net heterotrophy in lakes during nutrient addition and food web manipulations". Limnology and Oceanography. 45 (8): 1718–1730. doi:10.4319/lo.2000.45.8.1718. ISSN 0024-3590.
{{cite journal}}: Check date values in:|date=(help)CS1 maint: unflagged free DOI (link) - ^ "Staying afloat in the sensor data deluge". Trends in Ecology & Evolution. 27 (2): 121–129. 2012-02-01. doi:10.1016/j.tree.2011.11.009. ISSN 0169-5347.