Campus Units

Ecology, Evolution and Organismal Biology, Natural Resource Ecology and Management

Document Type

Article

Publication Version

Published Version

Publication Date

12-15-2010

Journal or Book Title

Agriculture, Ecosystems & Environment

Volume

139

Issue

4

First Page

749

Last Page

753

DOI

10.1016/j.agee.2010.09.009

Abstract

Close relationships among climatic factors and soil respiration (Rs) are commonly reported. However, variation in Rs across the landscape is compounded by site-specific differences that impede the development of spatially explicit models. Among factors that influence Rs, the effect of ecosystem age is poorly documented. We hypothesized that Rs increases with grassland age and tested this hypothesis in a chronosequence of tallgrass prairie reconstructions in central Iowa, U.S.A. We also assessed changes in root biomass, root ingrowth, aboveground net primary productivity (ANPP), and the strength of soil temperature and moisture in predicting Rs. We found a significant increase in total growing season Rs with prairie age (R2 = 0.79), ranging from 714 g C m−2 in the youngest reconstruction (age 4) to 939 g C m−2 in the oldest prairie (age 12). Soil temperature was a strong predictor of intra-seasonal Rs among prairies (R2 = 0.78–0.87) but mean growing season soil temperature and moisture did not relate to total Rs. The increase in Rs with age was positively correlated with root biomass (r = 0.80) and ANPP (r = 0.87) but not with root ingrowth. Our findings suggest that growing season Rs increases with tallgrass prairie age, root biomass, and ANPP during young grassland development.

Comments

This article is published as Maher, Ryan M., Heidi Asbjornsen, Randall K. Kolka, Cynthia A. Cambardella, and James W. Raich. "Changes in soil respiration across a chronosequence of tallgrass prairie reconstructions." Agriculture, ecosystems & environment 139, no. 4 (2010): 749-753. doi: 10.1016/j.agee.2010.09.009. Posted with permission.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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