DOI: 10.1016/j.foreco.2016.02.011
Scopus记录号: 2-s2.0-84958964563
论文题名: Grazing deteriorates the soil carbon stocks of Caatinga forest ecosystems in Brazil
作者: Schulz K. ; Voigt K. ; Beusch C. ; Almeida-Cortez J.S. ; Kowarik I. ; Walz A. ; Cierjacks A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 367 起始页码: 62
结束页码: 70
语种: 英语
英文关键词: Carbon cycle
; Degradation
; Desertification
; Livestock
; Semi-arid
; Soil
Scopus关键词: Agriculture
; Degradation
; Ecology
; Ecosystems
; Forestry
; Organic carbon
; Plants (botany)
; Reservoirs (water)
; Sea level
; Above ground biomass
; Arid and semi-arid regions
; Carbon cycles
; Desertification
; Environmental parameter
; Livestock
; Semi arid
; Soil organic Carbon stocks
; Soils
; Animalia
; Bos
; Capra hircus
; Ungulata
英文摘要: Grazing by domestic ungulates can have substantial impacts on forests in arid and semi-arid regions, possibly including severe loss of carbon from the soil. Predicting net livestock impacts on soil organic carbon stocks remains challenging, however, due to the dependence on animal loads and on soil and environmental parameters. The objective of this study was to better understand grazing effects on soil organic carbon in seasonal tropical dry forests of north-eastern Brazil (Caatinga) by quantifying carbon stocks of the upper soil profile (0-5cm depth) and greater soil depths (>5cm depth down to bedrock) along a gradient of grazing intensity while accounting for other influencing factors such as soil texture, vegetation, landscape topography, and water availability. We analysed soil organic carbon, soil clay content, altitude above sea level, soil depth to bedrock, distance to the nearest permanent water body, species diversity of perennial plants and aboveground biomass on 45 study plots located in the vicinity of the Itaparica Reservoir, Pernambuco, Brazil. Livestock (mainly goats and cattle) are unevenly distributed in the studied ecosystem, thus grazing intensity was accounted for based on the weight of livestock droppings per square metre and classified as no or light, intermediate, or heavy grazing. The mean soil organic carbon in the area was 16.86 ± 1.28 Mg ha-1 C with approximately one-quarter found in the upper 5 cm of the soil profile (4.14 ± 0.43 Mg ha-1 C) and the remainder (12.57 ± 0.97 Mg ha-1 C) in greater soil depths (>5cm). Heavy grazing led to significantly lower soil organic carbon stocks in the upper 5 cm, whereas no effect on soil organic carbon of the soil overall or in greater soil depths was detectable. The soil's clay content and the altitude proved to be the most relevant factors influencing overall soil organic carbon stocks and those in greater soil depths (>5cm). Our findings suggest that grazing causes substantial release of carbon from Brazilian dry forest soils, which should be addressed through improved grazing management via a legally compulsory rotation system. This would ultimately contribute to the conservation of a unique forest system and associated ecosystem services. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64998
Appears in Collections: 影响、适应和脆弱性
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作者单位: Technische Universität Berlin, Department of Ecology, Ecosystem Science/Plant Ecology, Rothenburgstraße 12, Berlin, Germany; University of Potsdam, Institute of Earth and Environmental Science, Karl-Liebknecht-Str. 24-25, Potsdam-Golm, Germany; Technische Universität Berlin, Department of Ecology, Soil Science, Ernst-Reuter-Platz 1, Berlin, Germany; Universidade Federal de Pernambuco, Departamento de Botânica, Centro de Ciências Biológicas, Av. Prof. Moraes Rego, 1235 Cidade Universitária, Recife, Pernambuco CEP, Brazil; Universität Hamburg, Biocenter Klein Flottbek, Biodiversity of Useful Plants, Ohnhorststraße 18, Hamburg, Germany
Recommended Citation:
Schulz K.,Voigt K.,Beusch C.,et al. Grazing deteriorates the soil carbon stocks of Caatinga forest ecosystems in Brazil[J]. Forest Ecology and Management,2016-01-01,367