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Ecology, 85(10), 2004, pp. 28042817 2004 by the Ecological Society of America
 

Summary: 2804
Ecology, 85(10), 2004, pp. 28042817
2004 by the Ecological Society of America
SOIL RESPIRATION AND NUTRIENT CYCLING IN WOODED
COMMUNITIES DEVELOPING IN GRASSLAND
R. L. MCCULLEY,1,3
S. R. ARCHER,1,4
T. W. BOUTTON,1
F. M. HONS,2
AND D. A. ZUBERER2
1Department of Rangeland Ecology and Management, Texas A&M University, College Station, Texas 77843-2126 USA
2Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843-2126 USA
Abstract. Grasslands and savannas worldwide are experiencing increases in woody
plant abundance. In the subtropical Rio Grande Plains of southern Texas and northern
Mexico, this change in physiognomy typically results in soil C and N accumulation. The
extent to which this accumulation is the result of increased C and N inputs vs. decreased
losses is not known. To address this issue, we compared soil C and N pools, soil respiration,
soil microbial biomass, and potential C and N mineralization and nitrification rates in
remnant grassland communities and adjacent woody plant communities known to have
developed on grassland within the past 100 years. Mean soil organic C (SOC) and total N

  

Source: Archer, Steven R. - Savanna/Woodland Ecology Lab., School of Natural Resources and the Environment, University of Arizona

 

Collections: Environmental Sciences and Ecology