Arid
DOI10.1080/15324980701784274
Functional group and species responses to precipitation in three semi-arid rangeland ecosystems
Derner, Justin D.1; Hess, Bret W.2; Olson, Richard A.3; Schuman, Gerald E.1
通讯作者Derner, Justin D.
来源期刊ARID LAND RESEARCH AND MANAGEMENT
ISSN1532-4982
出版年2008
卷号22期号:1页码:81-92
英文摘要

The objective of this study was to compare forage production and foliar and basal cover responses of plant communities, plant functional groups, and individual species between years with below average (2004) and well above-average (2005) spring precipitation in three semi-arid rangeland ecosystems (shortgrass steppe, northern mixed-grass prairie, and sagebrush grassland). Foliar and basal cover at the time of a peak standing crop were visually estimated using modified Daubenmire cover categories, and forage production by species was harvested from areas that had been excluded from large herbivores. Responses of forage production to precipitation, but not foliar and basal cover, were similar for the three semi-arid ecosystems. Total forage production was more responsive (75-159%) than basal (8-35%) or foliar (2-29%) cover to increasing precipitation. Absolute (1016 kg center dot ha(-1)) and relative (159%) increases in total forage production from 2004 to 2005 were greatest for the shortgrass steppe. Forage production increases were largely attributable to greater production by C3 perennial graminoids in each ecosystem; increases in basal and foliar cover for this plant functional group were observed in shortgrass steppe and sagebrush grassland, but not in northern mixed-grass prairie. Fine-scale inputs of species and plant functional group responses to precipitation will further the accuracy of forage prediction models in predicting both total biomass production and relative proportions of plant biomass.


英文关键词bare ground basal cover foliar cover forage production northern mixed-grass prairie sagebrush grassland shortgrass steppe
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000252059200006
WOS关键词MIXED-GRASS PRAIRIE ; SHORTGRASS STEPPE ; TALLGRASS PRAIRIE ; FORAGE PRODUCTION ; PLANT-PRODUCTION ; USE EFFICIENCY ; UNITED-STATES ; VEGETATION ; PRODUCTIVITY ; DYNAMICS
WOS类目Environmental Sciences ; Soil Science
WOS研究方向Environmental Sciences & Ecology ; Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/156502
作者单位1.USDA ARS, High Plains Grasslands Res Stn, Cheyenne, WY 82009 USA;
2.Univ Wyoming, Dept Anim Sci, Laramie, WY 82071 USA;
3.Univ Wyoming, Dept Renewable Resources, Laramie, WY 82071 USA
推荐引用方式
GB/T 7714
Derner, Justin D.,Hess, Bret W.,Olson, Richard A.,et al. Functional group and species responses to precipitation in three semi-arid rangeland ecosystems[J],2008,22(1):81-92.
APA Derner, Justin D.,Hess, Bret W.,Olson, Richard A.,&Schuman, Gerald E..(2008).Functional group and species responses to precipitation in three semi-arid rangeland ecosystems.ARID LAND RESEARCH AND MANAGEMENT,22(1),81-92.
MLA Derner, Justin D.,et al."Functional group and species responses to precipitation in three semi-arid rangeland ecosystems".ARID LAND RESEARCH AND MANAGEMENT 22.1(2008):81-92.
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