Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub

    Description

    Our objectives were to quantify and compare soil CO2, efflux of two doininant soil types in an old-growth neotropical rain forest in the Atlantic zone of Costa Rica, and to evaluate the control of environmental Factors on CO2, release. We measured soil CO2 efflux from eight permanent soil chamhers on six Oxisol sites. Three sites were developed on old river terraces ('old alluvium') and the other three were developed on old lava flows ('residual'). At the same time we measured soil C02 concentrations. soil water content and soil tetnperature at various depths in 6 soil shafts (3 in deep). Between 'old alluvium' sites. the two-year average CO2 flux rates ranged from 117.3 to 128.9 nig C m-2 h-1. Signiticaiitly higher soil CO2, flux occurred on the 'residual' sites (141.1 to 184.2 ing C m-2 h-1). Spatial dil'ferences in CO2, efflux were related to fine root biomziss. soil carbon and phosphorus concentration hut also to soil water content. Spatial variability in CO2 storage was high and the amount of C02 stored in the upper and lower soil profile was different between 'old alluvial' and 'residual' sites. The inajor factor identifed Sot- explaining tetnporal variatiot~s in soil CO, efflux was soil water content. During periods of high soil water content CO2, etnission decreased. plnhahly due to lowet- diffusion and CO2, production rates. Dtiring the 2-year study period inter--annual variation in soil C02 efflux was not detected.

    Publication Notes

    • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Schwendenmann, Luitgard; Veldkamp, Edzo; Brenes, Tania; O'Brien, Joseph J.; Mackensen, Jens 2003. Spatial and temporal variation in soil CO2 efflux in an old-growth neotropical rain forest, LA Selva, Costa Rica. Biogeochemistry 64: 111-128

    Keywords

    CO2 efflux, Neotropical rain forrest, seasonality, Soil CO2 storage, Soil Temperature, Soil Water content

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page