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Title: The effect of regional groundwater on carbon dioxide and methane emissions from a lowland rainforest stream in Costa Rica

Abstract

In the tropical rainforest at La Selva Biological Station in Costa Rica, regional bedrock groundwater high in dissolved carbon discharges into some streams and wetlands, with the potential for multiple cascading effects on ecosystem carbon pools and fluxes. We investigated carbon dioxide (CO2) and methane (CH4) degassing from two streams at La Selva: the Arboleda, where ~1/3 of the streamflow is from regional groundwater, and the Taconazo, fed exclusively by local groundwater recharged within the catchment. The regional groundwater inflow to the Arboleda had no measurable effect on stream gas exchange velocity, dissolved CH4 concentration, or CH4 emissions but significantly increased stream CO2 concentration and degassing. CO2 evasion from the reach of the Arboleda receiving regional groundwater (lower Arboleda) averaged 5.5 mol C m-2 d-1, ~7.5x higher than the average (0.7 mol C m-2 d-1) from the stream reaches with no regional groundwater inflow (the Taconazo and upper Arboleda). Carbon emissions from both streams were dominated by CO2; CH4 accounted for only 0.06-1.70% of the total (average of both streams: 5 x10-3 mol C m-2 d-1). Annual stream degassing fluxes normalized by watershed area were 48 and 299 g C m-2 for the Taconazo and Arboleda, respectively. CO2 degassing frommore » the Arboleda is a significant carbon flux, similar in magnitude to the average net ecosystem exchange estimated by eddy covariance. As a result, examining the effects of catchment connections to underlying hydrogeological systems can help avoid overestimation of ecosystem respiration and advance our understanding of carbon source/sink status and overall terrestrial ecosystem carbon budgets.« less

Authors:
 [1];  [1];  [2];  [2]
  1. North Carolina State Univ., Raleigh, NC (United States)
  2. Florida Intl Univ., Miami, FL (United States)
Publication Date:
Research Org.:
North Carolina State Univ., Raleigh, NC (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1344550
Alternate Identifier(s):
OSTI ID: 1402132
Grant/Contract Number:  
SC0006703; DE‐SC0006703
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Biogeosciences
Additional Journal Information:
Journal Volume: 120; Journal Issue: 12; Journal ID: ISSN 2169-8953
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; carbon dioxide; methane; greenhouse gas; regional groundwater; tropical rainforest

Citation Formats

Oviedo-Vargas, Diana, Genereux, David P., Dierick, Diego, and Oberbauer, Steven F. The effect of regional groundwater on carbon dioxide and methane emissions from a lowland rainforest stream in Costa Rica. United States: N. p., 2015. Web. https://doi.org/10.1002/2015JG003009.
Oviedo-Vargas, Diana, Genereux, David P., Dierick, Diego, & Oberbauer, Steven F. The effect of regional groundwater on carbon dioxide and methane emissions from a lowland rainforest stream in Costa Rica. United States. https://doi.org/10.1002/2015JG003009
Oviedo-Vargas, Diana, Genereux, David P., Dierick, Diego, and Oberbauer, Steven F. Tue . "The effect of regional groundwater on carbon dioxide and methane emissions from a lowland rainforest stream in Costa Rica". United States. https://doi.org/10.1002/2015JG003009. https://www.osti.gov/servlets/purl/1344550.
@article{osti_1344550,
title = {The effect of regional groundwater on carbon dioxide and methane emissions from a lowland rainforest stream in Costa Rica},
author = {Oviedo-Vargas, Diana and Genereux, David P. and Dierick, Diego and Oberbauer, Steven F.},
abstractNote = {In the tropical rainforest at La Selva Biological Station in Costa Rica, regional bedrock groundwater high in dissolved carbon discharges into some streams and wetlands, with the potential for multiple cascading effects on ecosystem carbon pools and fluxes. We investigated carbon dioxide (CO2) and methane (CH4) degassing from two streams at La Selva: the Arboleda, where ~1/3 of the streamflow is from regional groundwater, and the Taconazo, fed exclusively by local groundwater recharged within the catchment. The regional groundwater inflow to the Arboleda had no measurable effect on stream gas exchange velocity, dissolved CH4 concentration, or CH4 emissions but significantly increased stream CO2 concentration and degassing. CO2 evasion from the reach of the Arboleda receiving regional groundwater (lower Arboleda) averaged 5.5 mol C m-2 d-1, ~7.5x higher than the average (0.7 mol C m-2 d-1) from the stream reaches with no regional groundwater inflow (the Taconazo and upper Arboleda). Carbon emissions from both streams were dominated by CO2; CH4 accounted for only 0.06-1.70% of the total (average of both streams: 5 x10-3 mol C m-2 d-1). Annual stream degassing fluxes normalized by watershed area were 48 and 299 g C m-2 for the Taconazo and Arboleda, respectively. CO2 degassing from the Arboleda is a significant carbon flux, similar in magnitude to the average net ecosystem exchange estimated by eddy covariance. As a result, examining the effects of catchment connections to underlying hydrogeological systems can help avoid overestimation of ecosystem respiration and advance our understanding of carbon source/sink status and overall terrestrial ecosystem carbon budgets.},
doi = {10.1002/2015JG003009},
journal = {Journal of Geophysical Research. Biogeosciences},
number = 12,
volume = 120,
place = {United States},
year = {2015},
month = {12}
}

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CO 2 and CH 4 emissions from streams in a lake-rich landscape: Patterns, controls, and regional significance
journal, March 2014

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  • Global Biogeochemical Cycles, Vol. 28, Issue 3
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Naturally Occurring Radon 222 as a Tracer for Streamflow Generation: Steady State Methodology and Field Example
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Determination of gas exchange rate constants for a small stream on Walker Branch Watershed, Tennessee
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A paired-watershed budget study to quantify interbasin groundwater flow in a lowland rain forest, Costa Rica: RAINFOREST WATERSHED BUDGETS
journal, April 2005

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  • Water Resources Research, Vol. 41, Issue 4
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On the parameters influencing air-water gas exchange
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Measurement of the diffusion coefficients of sparingly soluble gases in water
journal, January 1987

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CO2 degassing in the Oregon Cascades
journal, January 1999


CO 2 efflux from Amazonian headwater streams represents a significant fate for deep soil respiration
journal, January 2008

  • Johnson, Mark S.; Lehmann, Johannes; Riha, Susan J.
  • Geophysical Research Letters, Vol. 35, Issue 17
  • DOI: 10.1029/2008GL034619

Soil-atmosphere exchange of nitrous oxide, nitric oxide, and methane under secondary succession of pasture to forest in the Atlantic lowlands of Costa Rica
journal, December 1994

  • Keller, Michael; Reiners, William A.
  • Global Biogeochemical Cycles, Vol. 8, Issue 4
  • DOI: 10.1029/94GB01660

Carbon dioxide evasion from headwater systems strongly contributes to the total export of carbon from a small boreal lake catchment
journal, January 2015

  • Kokic, Jovana; Wallin, Marcus B.; Chmiel, Hannah E.
  • Journal of Geophysical Research: Biogeosciences, Vol. 120, Issue 1
  • DOI: 10.1002/2014JG002706

Importance of CO 2 evasion from small boreal streams : CO
journal, October 2010

  • Koprivnjak, J. -F.; Dillon, P. J.; Molot, L. A.
  • Global Biogeochemical Cycles, Vol. 24, Issue 4
  • DOI: 10.1029/2009GB003723

Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface
journal, March 2000

  • Lovley, Derek R.; Anderson, Robert T.
  • Hydrogeology Journal, Vol. 8, Issue 1
  • DOI: 10.1007/PL00010974

Carbon degassing from the lithosphere
journal, June 2002


Characterization and isotopic composition of organic and inorganic carbon in the Milk River Aquifer
journal, August 1989

  • Murphy, Ellyn M.; Davis, Stanley N.; Long, Austin
  • Water Resources Research, Vol. 25, Issue 8
  • DOI: 10.1029/WR025i008p01893

Estimating the Surface Area of Small Rivers in the Southwestern Amazon and Their Role in CO 2 Outgassing
journal, June 2008

  • de Fátima F. L. Rasera, Maria; Ballester, Maria Victoria R.; Krusche, Alex V.
  • Earth Interactions, Vol. 12, Issue 6
  • DOI: 10.1175/2008EI257.1

River basins as groundwater exporters and importers: Implications for water cycle and climate modeling
journal, January 2009

  • Schaller, Morgan F.; Fan, Ying
  • Journal of Geophysical Research, Vol. 114, Issue D4
  • DOI: 10.1029/2008JD010636

Sources of nitrogen and methane in Central American geothermal settings: Noble gas and 129 I evidence for crustal and magmatic volatile components : SOURCES OF N
journal, January 2003

  • Snyder, Glen; Poreda, Robert; Fehn, Udo
  • Geochemistry, Geophysics, Geosystems, Vol. 4, Issue 1
  • DOI: 10.1029/2002GC000363

Testing mixing models of old and young groundwater in a tropical lowland rain forest with environmental tracers: TESTING MIXING MODELS WITH ENVIRONMENTAL TRACERS
journal, April 2010

  • Solomon, D. Kip; Genereux, David P.; Plummer, L. Niel
  • Water Resources Research, Vol. 46, Issue 4
  • DOI: 10.1029/2009WR008341

Carbon dioxide and methane emissions from the Yukon River system: YUKON RIVER C GAS EMISSIONS
journal, November 2012

  • Striegl, Robert G.; Dornblaser, M. M.; McDonald, C. P.
  • Global Biogeochemical Cycles, Vol. 26, Issue 4
  • DOI: 10.1029/2012GB004306

Measurement of the diffusion coefficients of carbon dioxide and nitrous oxide in water and aqueous solutions of glycerol
journal, January 1965

  • Thomas, W. J.; Adams, M. J.
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  • DOI: 10.1039/TF9656100668

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    • DOI: 10.1002/2017jg003793