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Soil respiration in...
Soil respiration in a northeastern US temperate forest : a 22-year synthesis
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Giasson, M-A (författare)
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Ellison, A. M. (författare)
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Bowden, R. D. (författare)
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visa fler...
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- Crill, Patrick M. (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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Davidson, E. A. (författare)
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Drake, J. E. (författare)
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Frey, S. D. (författare)
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Hadley, J. L. (författare)
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Lavine, M. (författare)
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Melillo, J. M. (författare)
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Munger, J. W. (författare)
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Nadelhoffer, K. J. (författare)
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Nicoll, L. (författare)
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Ollinger, S. V. (författare)
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Savage, K. E. (författare)
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Steudler, P. A. (författare)
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Tang, J. (författare)
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Varner, R. K. (författare)
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Wofsy, S. C. (författare)
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Foster, D. R. (författare)
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Finzi, A. C. (författare)
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visa färre...
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(creator_code:org_t)
- 2013
- 2013
- Engelska.
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Ingår i: Ecosphere. - 2150-8925 .- 2150-8925. ; 4:11, s. UNSP 140-
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- To better understand how forest management, phenology, vegetation type, and actual and simulated climatic change affect seasonal and inter-annual variations in soil respiration (R-s), we analyzed more than 100,000 individual measurements of soil respiration from 23 studies conducted over 22 years at the Harvard Forest in Petersham, Massachusetts, USA. We also used 24 site-years of eddy-covariance measurements from two Harvard Forest sites to examine the relationship between soil and ecosystem respiration (R-e). R-s was highly variable at all spatial (respiration collar to forest stand) and temporal (minutes to years) scales of measurement. The response of R-s to experimental manipulations mimicking aspects of global change or aimed at partitioning R-s into component fluxes ranged from similar to 70% to +52%. The response appears to arise from variations in substrate availability induced by changes in the size of soil C pools and of belowground C fluxes or in environmental conditions. In some cases (e.g., logging, warming), the effect of experimental manipulations on R-s was transient, but in other cases the time series were not long enough to rule out long-term changes in respiration rates. Inter-annual variations in weather and phenology induced variation among annual R-s estimates of a magnitude similar to that of other drivers of global change (i.e., invasive insects, forest management practices, N deposition). At both eddy-covariance sites, aboveground respiration dominated R-e early in the growing season, whereas belowground respiration dominated later. Unusual aboveground respiration patterns-high apparent rates of respiration during winter and very low rates in mid-to-late summer-at the Environmental Measurement Site suggest either bias in R-s and R-e estimates caused by differences in the spatial scale of processes influencing fluxes, or that additional research on the hard-to-measure fluxes (e.g., wintertime R-s, unaccounted losses of CO2 from eddy covariance sites), daytime and nighttime canopy respiration and its impacts on estimates of R-e, and independent measurements of flux partitioning (e.g., aboveground plant respiration, isotopic partitioning) may yield insight into the unusually high and low fluxes. Overall, however, this data-rich analysis identifies important seasonal and experimental variations in R-s and R-e and in the partitioning of R-e above-vs. belowground.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- ecosystem respiration
- eddy covariance
- flux partitioning
- Harvard Forest
- phenology
- soil respiration
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
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Giasson, M-A
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Ellison, A. M.
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Bowden, R. D.
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Crill, Patrick M ...
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Davidson, E. A.
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Drake, J. E.
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visa fler...
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Frey, S. D.
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Hadley, J. L.
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Lavine, M.
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Melillo, J. M.
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Munger, J. W.
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Nadelhoffer, K. ...
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Nicoll, L.
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Ollinger, S. V.
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Savage, K. E.
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Steudler, P. A.
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Tang, J.
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Varner, R. K.
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Wofsy, S. C.
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Foster, D. R.
-
Finzi, A. C.
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Geovetenskap och ...
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och Miljövetenskap
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- NATURVETENSKAP
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NATURVETENSKAP
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och Biologi
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och Ekologi
- Artiklar i publikationen
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Ecosphere
- Av lärosätet
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Stockholms universitet