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dc.contributor.authorFernández-A., R. J.
dc.contributor.authorSala, O. E.
dc.contributor.authorGolluscio, R. A.
dc.date.accessioned2020-09-24T02:19:03Z
dc.date.available2020-09-24T02:19:03Z
dc.date.issued1991-09-01
dc.identifier.citationFernández-A, R. J., Sala, O. E., & Golluscio, R. A. (1991). Woody and herbaceous aboveground production of a Patagonian steppe. Journal of Range Management, 44(5), 434-437.
dc.identifier.issn0022-409X
dc.identifier.doi10.2307/4002739
dc.identifier.urihttp://hdl.handle.net/10150/644811
dc.description.abstractAboveground net primary production (ANPP) of the Patagonian steppe in southwestern Chubut (Argentina) was estimated using a harvest technique to assess the herbaceous (mainly grass) component and a double sampling technique to evaluate shrub production. The latter requires the measurement of plant dimensions and the harvest of shrub biomass in small plots. This technique, by virtue of having an explicit biological model which considers both shrub size and production per unit surface of plant, allows comparisons among years, sites, and treatments. Detailed estimates of ANPP yielded a value of 79 g of dry matter (DM) m-2 yr-1 (SE = 19 g DM m-2 yr-1) for an annual rainfall of 191 mm. Our estimates fits (+/- 17%) predictions of 4 models relating primary production to annual precipitation. Two thirds of production were accounted for by perennial grasses and one third by shrubs. A less detailed method, which uses only peak biomass, gave ANPP estimates for 4 additional years ranging from 21 to 75 g DM m-2 yr-1 while annual precipitation during this period ranged from 55 to 167 mm. There was a large reduction in ANPP during a year of extreme drought; however, there were no increases in ANPP during years with above-average precipitation. This suggests that the carrying capacity for the Patagonian steppe may not be linearly related to precipitation.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectaboveground net primary production
dc.subjectdry matter accumulation
dc.subjectcarrying capacity
dc.subjectplant ecology
dc.subjectsteppes
dc.subjectrain
dc.subjectwoody plants
dc.subjectbiomass production
dc.subjectshrubs
dc.subjectseasonal variation
dc.subjectArgentina
dc.subjectgrasses
dc.titleWoody and herbaceous aboveground production of a Patagonian steppe
dc.typetext
dc.typeArticle
dc.identifier.journalJournal of Range Management
dc.description.noteThis material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.
dc.description.collectioninformationThe Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform August 2020
dc.source.volume44
dc.source.issue5
dc.source.beginpage434-437
refterms.dateFOA2020-09-24T02:19:03Z


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