|Title||Spatial heterogeneity in Chihuahuan Desert vegetation: implications for sampling methods in semi-arid ecosystems|
|Publication Type||Journal Article|
|Year of Publication||2001|
|Authors||Huenneke L., Clason D, Muldavin E|
|Journal||Journal of Arid Environments|
|Keywords||article, articles, Bouteloua, net primary production, ecosystem, plant production, journal, journals, Larrea, net primary production, net primary production, plants, net primary production, Prosopis, net primary production, spatial heterogeneity, technique, aboveground NPP|
Patchiness of above-ground vegetation, such as that in semi-arid grasslands and shrublands, can pose problems in sampling plant cover, biomass and productivity. We present a method of measuring above-ground plant biomass and production that can be applied consistently among vegetation types and that generates seasonal, spatially-explicit results. Results from 15 sites within the Jornada Basin (Chihuahuan Desert, New Mexico, USA) confirm considerable patchiness and non-normal distributions of plant biomass, even in grasslands. However, tests of adequacy of sample size and of sample error associated with the regression-based estimates of biomass confirmed that the estimates of above-ground net primary productivity are sufficiently precise to be useful in comparisons of both shrub-dominated and grassland sites.
|Reprint Edition||In File (02/23/2001)|