DOI: 10.1016/j.foreco.2015.12.032
Scopus记录号: 2-s2.0-84952909983
论文题名: Why are forests so scarce in subtropical South America? The shaping roles of climate, fire and livestock
作者: Bernardi R.E. ; Holmgren M. ; Arim M. ; Scheffer M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 363 起始页码: 212
结束页码: 217
语种: 英语
英文关键词: Campos
; Cattle
; Rangelands
; Savanna
; Tropical tree cover
; Woody encroachment
Scopus关键词: Agriculture
; Climate models
; Regression analysis
; Remote sensing
; Soil moisture
; Campos
; Cattle
; Rangelands
; Savanna
; Tropical tree
; Woody encroachments
; Forestry
; Bos
英文摘要: Forest cover is notoriously sparse across neotropical southeastern South America. In particular, the practically treeless landscapes of the Campos, as they are locally known, have puzzled ecologists since Darwin's time. We used remote-sensing information and spatial regression models to relate tree cover to resource availability (i.e. climate, soil fertility, soil water holding capacity), disturbances (i.e. fire occurrence, cattle grazing) and landscape features that can mediate the effects of both (i.e. topography, distance to rivers). To better understand these relationships, we conducted the analysis at different spatial scales across non-cultivated areas of southeastern South America. Overall, tree cover in southeastern South America increases with precipitation but is limited by livestock densities and fire occurrence. Forests are concentrated close to rivers, especially in the Campos region, where cattle grazing seems to prevent tree expansion into the grasslands. © 2015 Elsevier B.V.. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65069
Appears in Collections: 影响、适应和脆弱性
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作者单位: Resource Ecology Group, Wageningen University, P.O. Box 47, Wageningen, Netherlands; Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, Wageningen, Netherlands; Departamento de Ecología Teórica y Aplicada, Centro Universitario Regional Este (CURE), Universidad de la República, Uruguay
Recommended Citation:
Bernardi R.E.,Holmgren M.,Arim M.,et al. Why are forests so scarce in subtropical South America? The shaping roles of climate, fire and livestock[J]. Forest Ecology and Management,2016-01-01,363