A net ecosystem carbon budget for snow dominated forested headwater catchments: linking water and carbon fluxes to critical zone carbon storage

Julia Perdrial, Paul Brooks, Tyson Swetnam, Kathleen A. Lohse, Craig Rasmussen, Marcy Litvak, Adrian A. Harpold, Xavier Zapata-Rios, Patrick Broxton, Bhaskar Mitra, Thomas Meixner, Kate Condon, David Huckle, Clare Stielstra, Angélica Vázquez-Ortega, Rebecca Lybrand, Molly Holleran, Caitlin Orem, Jon Pelletier, Jon Chorover

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Climate-driven changes in carbon (C) cycling of forested ecosystems have the potential to alter long-term C sequestration and the global C balance. Prior studies have shown that C uptake and partitioning in response to hydrologic variation are system specific, suggesting that a comprehensive assessment is required for distinct ecosystems. Many sub-humid montane forest ecosystems in the US are projected to experience increased water limitation over the next decades and existing water-limited forests can be used as a model for how changes in the hydrologic cycle will impact such ecosystems more broadly. Toward that goal we monitored precipitation, net ecosystem exchange and lateral soil and stream C fluxes in three semi-arid to sub-humid montane forest catchments for several years (WY 2009–2013) to investigate how the amount and timing of water delivery affect C stores and fluxes. The key control on aqueous and gaseous C fluxes was the distribution of water between winter and summer precipitation, affecting ecosystem C uptake versus heterotrophic respiration. We furthermore assessed C stores in soil and above- and below-ground biomass to assess how spatial patterns in water availability influence C stores. Topographically-driven patterns in catchment wetness correlated with modeled soil C stores, reflecting both long-term trends in local C uptake as well as lateral redistribution of C leached from upslope organic soil horizons to convergent landscape positions. The results suggest that changes in the seasonality of precipitation from winter snow to summer rain will influence both the amount and the spatial distribution of soil C stores.

Original languageEnglish (US)
Pages (from-to)1-19
Number of pages19
JournalBiogeochemistry
DOIs
StateAccepted/In press - Apr 21 2018

Fingerprint

carbon budget
carbon flux
Snow
headwater
Catchments
carbon sequestration
Ecosystems
Carbon
snow
catchment
Fluxes
Water
ecosystem
Soils
montane forest
soil
water
net ecosystem exchange
belowground biomass
winter

Keywords

  • Biomass
  • Carbon budget
  • Critical zone
  • Forested
  • Lateral carbon transfer
  • Soil
  • Water limitation

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Earth-Surface Processes

Cite this

A net ecosystem carbon budget for snow dominated forested headwater catchments : linking water and carbon fluxes to critical zone carbon storage. / Perdrial, Julia; Brooks, Paul; Swetnam, Tyson; Lohse, Kathleen A.; Rasmussen, Craig; Litvak, Marcy; Harpold, Adrian A.; Zapata-Rios, Xavier; Broxton, Patrick; Mitra, Bhaskar; Meixner, Thomas; Condon, Kate; Huckle, David; Stielstra, Clare; Vázquez-Ortega, Angélica; Lybrand, Rebecca; Holleran, Molly; Orem, Caitlin; Pelletier, Jon; Chorover, Jon.

In: Biogeochemistry, 21.04.2018, p. 1-19.

Research output: Contribution to journalArticle

Perdrial, J, Brooks, P, Swetnam, T, Lohse, KA, Rasmussen, C, Litvak, M, Harpold, AA, Zapata-Rios, X, Broxton, P, Mitra, B, Meixner, T, Condon, K, Huckle, D, Stielstra, C, Vázquez-Ortega, A, Lybrand, R, Holleran, M, Orem, C, Pelletier, J & Chorover, J 2018, 'A net ecosystem carbon budget for snow dominated forested headwater catchments: linking water and carbon fluxes to critical zone carbon storage', Biogeochemistry, pp. 1-19. https://doi.org/10.1007/s10533-018-0440-3
Perdrial, Julia ; Brooks, Paul ; Swetnam, Tyson ; Lohse, Kathleen A. ; Rasmussen, Craig ; Litvak, Marcy ; Harpold, Adrian A. ; Zapata-Rios, Xavier ; Broxton, Patrick ; Mitra, Bhaskar ; Meixner, Thomas ; Condon, Kate ; Huckle, David ; Stielstra, Clare ; Vázquez-Ortega, Angélica ; Lybrand, Rebecca ; Holleran, Molly ; Orem, Caitlin ; Pelletier, Jon ; Chorover, Jon. / A net ecosystem carbon budget for snow dominated forested headwater catchments : linking water and carbon fluxes to critical zone carbon storage. In: Biogeochemistry. 2018 ; pp. 1-19.
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