气候变化领域集成服务门户(CCPortal): Climate and soils at the Brazilian semiarid and the forest-Caatinga problem: New insights and implications for conservation

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DOI	10.1088/1748-9326/ab3d7b
	Climate and soils at the Brazilian semiarid and the forest-Caatinga problem: New insights and implications for conservation
	De Castro Oliveira G.; Francelino M.R.; Arruda D.M.; Fernandes-Filho E.I.; Schaefer C.E.G.R.
发表日期	2019
ISSN	17489318
卷号	14 期号:10
英文摘要	This study aimed to test two hypotheses: (i) on the Brazilian semiarid territory, the climate has greater weight as a driver of vegetation than the soil and; (ii) the arboreal Caatinga is a vegetation whose environmental attributes are similar to the Dry Forest, in terms of soil and climate attributes. We analyzed attributes of the superficial horizon of 156 standardized profiles distributed throughout the Brazilian semiarid region. Bioclimatic variables were obtained from the WorldClim platform and extracted to profiles location. The main vegetation types in the region were considered: Caatinga, arboreal Caatinga, Dry Forest and Cerrado. Variable selection was performed with hierarchical correlation dendrogram and recursive feature elimination algorithm. Linear Discriminant Analysis and Random Forest (RF) algorithm were used for modeling the edaphic and climate niche and predict the vegetation with the selected variables. Climate and soil, individually, were able to separate the vegetation, but the climate was no better predictor than the soil. Therefore, we reject the first hypothesis. However, the better prediction was attained with the combined use of soil and climate attributes. The parsimonious RF model had good performance, with Kappa 0.61 ± 0.10 and 70.9% ± 7.7% accuracy. The combination of soil and climate predictors resulted in better separation of vegetation in the Brazilian semiarid region. Soil attributes are key variables in large-scale biogeographic modeling. The so-called arboreal Caatinga is distributed over a wide edaphic and climatic range, with strong similarity to the Dry Forest distribution, confirmed by the great overlap in the multivariate space, which confirms the second hypothesis. The results point towards an urgent review of the Atlantic Forest Law. The environments where the arboreal Caatinga and the Dry Forest occur are very similar, so that the former may represent a degraded phase of the Atlantic Forest, currently without the due legal protection. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	atlantic forest law; Caatinga; climate; environmental niche; environmental policy; seasonally dry tropical forests; soil
语种	英语
scopus关键词	Arid regions; Decision trees; Discriminant analysis; Forestry; Soils; Vegetation; Atlantic forest; Bioclimatic variables; Environmental attributes; Legal protection; Linear discriminant analysis; Recursive feature elimination; Semi-arid region; Variable selection; Soil conservation; accuracy assessment; bioclimatology; caatinga; conservation planning; correlation; dry forest; environmental factor; semiarid region; soil-vegetation interaction; vegetation type; Atlantic Forest
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154371
作者单位	Departamento de Solos, Universidade Federal de Vicosa, Vicosa, Brazil; Instituto de Geociencias, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
推荐引用方式 GB/T 7714	De Castro Oliveira G.,Francelino M.R.,Arruda D.M.,et al. Climate and soils at the Brazilian semiarid and the forest-Caatinga problem: New insights and implications for conservation[J],2019,14(10).
APA	De Castro Oliveira G.,Francelino M.R.,Arruda D.M.,Fernandes-Filho E.I.,&Schaefer C.E.G.R..(2019).Climate and soils at the Brazilian semiarid and the forest-Caatinga problem: New insights and implications for conservation.Environmental Research Letters,14(10).
MLA	De Castro Oliveira G.,et al."Climate and soils at the Brazilian semiarid and the forest-Caatinga problem: New insights and implications for conservation".Environmental Research Letters 14.10(2019).