Chapter

Estimating Aboveground Net Primary Production in Grassland- and Herbaceous-Dominated Ecosystems

Alan K. Knapp, John M. Briggs, Daniel L. Childers and Osvaldo E. Sala

in Principles and Standards for Measuring Primary Production

Published in print August 2007 | ISBN: 9780195168662
Published online September 2007 | e-ISBN: 9780199790128 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195168662.003.0003

Series: The Long-Term Ecological Research Network Series

 						Estimating Aboveground Net Primary Production in Grassland- and Herbaceous-Dominated Ecosystems

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Although grass- and herb-dominated ecosystems may be easier to sample for aboveground primary production than most others, a variety of challenges for standardizing approaches in different settings and circumstances must be overcome. This chapter describes the most common harvest approaches for grassland production measurement and a suite of site-specific criteria that affect the choice of approach (e.g., grazing, decomposition, phenology). Errors leading to either underestimation or overestimation are examined, and a case study describing approaches for evaluating sample adequacy is provided.

Keywords: harvest; grazing; phenology; sample adequacy; errors

Chapter.  10124 words.  Illustrated.

Subjects: Animal Pathology and Diseases

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