Arid
DOI10.1016/j.foreco.2016.02.011
Grazing deteriorates the soil carbon stocks of Caatinga forest ecosystems in Brazil
Schulz, Katharina1; Voigt, Karsten2; Beusch, Christine3; Almeida-Cortez, Jarcilene S.4; Kowarik, Ingo1; Walz, Ariane2; Cierjacks, Arne1,5
通讯作者Schulz, Katharina
来源期刊FOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
EISSN1872-7042
出版年2016
卷号367页码:62-70
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 (0-5 cm depth) and greater soil depths (>5 cm 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 (>5 cm). 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 (>5 cm). 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. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Carbon cycle Degradation Desertification Livestock Semi-arid Soil
类型Article
语种英语
国家Germany ; Brazil
收录类别SCI-E
WOS记录号WOS:000375161300007
WOS关键词LAND-USE CHANGE ; ORGANIC-CARBON ; BULK-DENSITY ; SEQUESTRATION ; GRASSLAND ; BIOMASS ; POOLS ; BIODIVERSITY ; MANAGEMENT ; IMPACTS
WOS类目Forestry
WOS研究方向Forestry
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/192996
作者单位1.Tech Univ Berlin, Dept Ecol Ecosyst Sci Plant Ecol, Rothenburgstr 12, D-12165 Berlin, Germany;
2.Univ Potsdam, Inst Earth & Environm Sci, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany;
3.Tech Univ Berlin, Dept Ecol Soil Sci, Ernst Reuter Pl 1, D-10587 Berlin, Germany;
4.Univ Fed Pernambuco, Ctr Ciencias Biol, Dept Bot, Av Prof Moraes Rego,1235 Cidade Univ, BR-50670901 Recife, PE, Brazil;
5.Univ Hamburg, Bioctr Klein Flottbek, Biodivers Useful Plants, Ohnhorststr 18, D-22609 Hamburg, Germany
推荐引用方式
GB/T 7714
Schulz, Katharina,Voigt, Karsten,Beusch, Christine,et al. Grazing deteriorates the soil carbon stocks of Caatinga forest ecosystems in Brazil[J],2016,367:62-70.
APA Schulz, Katharina.,Voigt, Karsten.,Beusch, Christine.,Almeida-Cortez, Jarcilene S..,Kowarik, Ingo.,...&Cierjacks, Arne.(2016).Grazing deteriorates the soil carbon stocks of Caatinga forest ecosystems in Brazil.FOREST ECOLOGY AND MANAGEMENT,367,62-70.
MLA Schulz, Katharina,et al."Grazing deteriorates the soil carbon stocks of Caatinga forest ecosystems in Brazil".FOREST ECOLOGY AND MANAGEMENT 367(2016):62-70.
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