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Temporal and Spatia...
Temporal and Spatial Variation in Peatland Carbon Cycling and Implications for Interpreting Responses of an Ecosystem-Scale Warming Experiment
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- Griffiths, Natalie A. (författare)
- Oak Ridge Natl Lab, USA
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- Hanson, Paul J. (författare)
- Oak Ridge Natl Lab, USA
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- Ricciuto, Daniel M. (författare)
- Oak Ridge Natl Lab, USA
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- Iversen, Colleen M. (författare)
- Oak Ridge Natl Lab, USA
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- Jensen, Anna M., 1978- (författare)
- Linnéuniversitetet,Institutionen för skog och träteknik (SOT),Oak Ridge Natl Lab, USA
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- Malhotra, Avni (författare)
- Oak Ridge Natl Lab, USA
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- McFarlane, Karis J. (författare)
- Lawrence Livermore Natl Lab, USA
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- Norby, Richard J. (författare)
- Oak Ridge Natl Lab, USA
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- Sargsyan, Khachik (författare)
- Sandia Natl Labs, USA
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- Sebestyen, Stephen D. (författare)
- USDA Forest Serv, USA
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- Shi, Xiaoying (författare)
- Oak Ridge Natl Lab, USA
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- Walker, Anthony P. (författare)
- Oak Ridge Natl Lab, USA
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- Ward, Eric J. (författare)
- Oak Ridge Natl Lab, USA
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- Warren, Jeffrey M. (författare)
- Oak Ridge Natl Lab, USA
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- Weston, David J. (författare)
- Oak Ridge Natl Lab, USA
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(creator_code:org_t)
- 2017-11-22
- 2017
- Engelska.
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Ingår i: Soil Science Society of America Journal. - : ACSESS. - 0361-5995 .- 1435-0661. ; 81:6, s. 1668-1688
- Relaterad länk:
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https://doi.org/10.2...
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https://www.osti.gov...
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https://urn.kb.se/re...
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https://doi.org/10.2...
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Abstract
Ämnesord
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- We are conducting a large-scale, long-term climate change response experiment in an ombrotrophic peat bog in Minnesota to evaluate the effects of warming and elevated CO2 on ecosystem processes using empirical and modeling approaches. To better frame future assessments of peatland responses to climate change, we characterized and compared spatial vs. temporal variation in measured C cycle processes and their environmental drivers. We also conducted a sensitivity analysis of a peatland C model to identify how variation in ecosystem parameters contributes to model prediction uncertainty. High spatial variability in C cycle processes resulted in the inability to determine if the bog was a C source or sink, as the 95% confidence interval ranged from a source of 50 g C m(-2) yr(-1) to a sink of 67 g C m(-2) yr(-1). Model sensitivity analysis also identified that spatial variation in tree and shrub photosynthesis, allocation characteristics, and maintenance respiration all contributed to large variations in the pretreatment estimates of net C balance. Variation in ecosystem processes can be more thoroughly characterized if more measurements are collected for parameters that are highly variable over space and time, and especially if those measurements encompass environmental gradients that may be driving the spatial and temporal variation (e.g., hummock vs. hollow microtopographies, and wet vs. dry years). Together, the coupled modeling and empirical approaches indicate that variability in C cycle processes and their drivers must be taken into account when interpreting the significance of experimental warming and elevated CO2 treatments.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Nyckelord
- Forestry and Wood Technology
- Skog och träteknik
- Miljövetenskap
- Environmental Science
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Griffiths, Natal ...
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Hanson, Paul J.
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Ricciuto, Daniel ...
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Iversen, Colleen ...
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Jensen, Anna M., ...
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Malhotra, Avni
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visa fler...
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McFarlane, Karis ...
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Norby, Richard J ...
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Sargsyan, Khachi ...
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Sebestyen, Steph ...
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Shi, Xiaoying
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Walker, Anthony ...
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Ward, Eric J.
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Warren, Jeffrey ...
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Weston, David J.
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visa färre...
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- NATURVETENSKAP
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och Geovetenskap och ...
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och Klimatforskning
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Soil Science Soc ...
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