Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1523-1739.2010.01540.x |
Consequences of Buffelgrass Pasture Development for Primary Productivity, Perennial Plant Richness, and Vegetation Structure in the Drylands of Sonora, Mexico | |
Franklin, Kimberly1; Molina-Freaner, Francisco2 | |
通讯作者 | Franklin, Kimberly |
来源期刊 | CONSERVATION BIOLOGY
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ISSN | 0888-8892 |
出版年 | 2010 |
卷号 | 24期号:6页码:1664-1673 |
英文摘要 | In large parts of northern Mexico native plant communities are being converted to non-native buffelgrass (Pennisetum ciliare) pastures, and this conversion could fundamentally alter primary productivity and species richness. In Sonora, Mexico land conversion is occurring at a regional scale along a rainfall-driven gradient of primary productivity, across which native plant communities transition from desert scrub to thorn scrub. We used a paired sampling design to compare a satellite-derived index of primary productivity, richness of perennial plant species, and canopy-height profiles of native plant communities with buffelgrass pastures. We sampled species richness across a gradient of primary productivity in desert scrub and thorn scrub vegetation to examine the influence of site productivity on the outcomes of land conversion. We also examined the influence of pasture age on species richness of perennial plants. Index values of primary productivity were lower in buffelgrass pastures than in native vegetation, which suggests a reduction in primary productivity. Land conversion reduced species richness by approximately 50% at local and regional scales, reduced tree and shrub cover by 78%, and reduced canopy height. Land conversion disproportionately reduced shrub species richness, which reflects the common practice among Sonoran ranchers of conserving certain tree and cactus species. Site productivity did not affect the outcomes of land conversion. The age of a buffelgrass pasture was unrelated to species richness within the pasture, which suggests that passive recovery of species richness to preconversion levels is unlikely. Our findings demonstrate that land conversion can result in large losses of plant species richness at local and regional scales and in substantial changes to primary productivity and vegetation structure, which casts doubt on the feasibility of restoring native plant communities without active intervention on the part of land managers.a |
英文关键词 | buffelgrass land-use change Mexico NDVI Pennisetum ciliare pasture plant diversity Sonora cambio de uso de suelo diversidad de plantas Mexico pastura NDVI Pennisetum ciliare Sonora |
类型 | Article |
语种 | 英语 |
国家 | USA ; Mexico |
收录类别 | SCI-E |
WOS记录号 | WOS:000284172800026 |
WOS关键词 | TROPICAL DRY FOREST ; BIOLOGICAL INVASIONS ; CENTRAL QUEENSLAND ; GLOBAL CHANGE ; LAND-USE ; BIOMASS ; DYNAMICS ; DEFORESTATION ; CONVERSION ; BIODIVERSITY |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
来源机构 | University of Arizona ; Universidad Nacional Autónoma de México |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/163749 |
作者单位 | 1.Univ Arizona, Ctr Insect Sci, Dept Entomol, Tucson, AZ 85721 USA; 2.Univ Nacl Autonoma Mexico, Inst Ecol, Hermosillo 83000, Sonora, Mexico |
推荐引用方式 GB/T 7714 | Franklin, Kimberly,Molina-Freaner, Francisco. Consequences of Buffelgrass Pasture Development for Primary Productivity, Perennial Plant Richness, and Vegetation Structure in the Drylands of Sonora, Mexico[J]. University of Arizona, Universidad Nacional Autónoma de México,2010,24(6):1664-1673. |
APA | Franklin, Kimberly,&Molina-Freaner, Francisco.(2010).Consequences of Buffelgrass Pasture Development for Primary Productivity, Perennial Plant Richness, and Vegetation Structure in the Drylands of Sonora, Mexico.CONSERVATION BIOLOGY,24(6),1664-1673. |
MLA | Franklin, Kimberly,et al."Consequences of Buffelgrass Pasture Development for Primary Productivity, Perennial Plant Richness, and Vegetation Structure in the Drylands of Sonora, Mexico".CONSERVATION BIOLOGY 24.6(2010):1664-1673. |
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