Arid
DOI10.1111/1365-2745.12712
Precipitation mediates the effect of human disturbance on the Brazilian Caatinga vegetation
Rito, Katia F.1,2; Arroyo-Rodriguez, Victor2; Queiroz, Rubens T.3; Leal, Inara R.4; Tabarelli, Marcelo4
通讯作者Rito, Katia F.
来源期刊JOURNAL OF ECOLOGY
ISSN0022-0477
EISSN1365-2745
出版年2017
卷号105期号:3页码:828-838
英文摘要

1. Seasonally dry tropical forests (SDTFs) are one of the most threatened forests world-wide. These species-rich forests not only cope with several acute (e.g. forest loss) and chronic (e.g. overgrazing and firewood extraction) human disturbances but also with climate change (e.g. longer and more severe droughts); yet, the isolated and combined effects of climate and acute and chronic human disturbances on SDTF vegetation are poorly known.


2. Given the environmental filter imposed by drought in SDTFs, the composition and structure of vegetation is expected to be strongly associated with annual precipitation, and thus the effects of human disturbances on vegetation may also depend on precipitation (i.e. interacting effect).


3. We tested these hypotheses in the Brazilian Caatinga - a SDTF threatened by climate change and human disturbances. We evaluated the isolated and combined (both additive and multiplicative) effect of precipitation, a chronic disturbance index and acute disturbance (landscape forest cover) on the diversity, stem density, evenness, taxonomic composition and above-ground biomass of adult trees and shrubs across 19 0.1-ha plots distributed along a disturbance and precipitation gradients.


4. We recorded 5541 stems from 129 species. Precipitation showed a stronger (positive) effect on species diversity than acute and chronic disturbances and, as expected, the effect of disturbance depended on precipitation (interacting effect): that is, species diversity (especially the number of rare species) was negatively related to forest loss but positively related to chronic disturbance in wetter sites, whereas in drier sites, species diversity was weakly related to forest cover, but strongly and negatively related to chronic disturbance. Contrary to species diversity, community evenness, stem density and biomass were weakly related to all predictors.


5. Synthesis. Precipitation appears to be a strong environmental filter determining the distribution of water-demanding plant species. Chronic disturbance in wetter (high-productive) forests may favour species diversity by increasing ecosystem heterogeneity (intermediate disturbance hypothesis). Yet, the biodiversity costs of chronic disturbance are higher in drier (low-productive) forests; that is, there is a co-limitation imposed by drought and disturbance in drier forests. Overall, our findings indicate that rapid climatic changes in the region will probably have strong negative effects on this seasonally dry tropical forest.


英文关键词anthropogenic disturbance biodiversity loss climate change seasonally dry tropical forest semi-arid ecosystem woody flora
类型Article
语种英语
国家Brazil ; Mexico
收录类别SCI-E
WOS记录号WOS:000400594500024
WOS关键词DRY TROPICAL FOREST ; CLIMATE-CHANGE ; ANTHROPOGENIC DISTURBANCE ; FLORISTIC COMPOSITION ; BIODIVERSITY LOSS ; HABITAT LOSS ; DIVERSITY ; DYNAMICS ; DROUGHT ; MODEL
WOS类目Plant Sciences ; Ecology
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology
来源机构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/2XILL650/200323
作者单位1.Univ Fed Pernambuco, Programa Posgrad Biol Vegetal, BR-50690901 Recife, PE, Brazil;
2.Univ Nacl Autonoma Mexico, Inst Invest Ecosistemas & Sustentabilidad, Morelia 58190, Michoacan, Mexico;
3.Univ Fed Paraiba, Dept Systemat & Ecol, BR-58051900 Joao Pessoa, Paraiba, Brazil;
4.Univ Fed Pernambuco, Dept Bot, BR-50670901 Recife, PE, Brazil
推荐引用方式
GB/T 7714
Rito, Katia F.,Arroyo-Rodriguez, Victor,Queiroz, Rubens T.,et al. Precipitation mediates the effect of human disturbance on the Brazilian Caatinga vegetation[J]. Universidad Nacional Autónoma de México,2017,105(3):828-838.
APA Rito, Katia F.,Arroyo-Rodriguez, Victor,Queiroz, Rubens T.,Leal, Inara R.,&Tabarelli, Marcelo.(2017).Precipitation mediates the effect of human disturbance on the Brazilian Caatinga vegetation.JOURNAL OF ECOLOGY,105(3),828-838.
MLA Rito, Katia F.,et al."Precipitation mediates the effect of human disturbance on the Brazilian Caatinga vegetation".JOURNAL OF ECOLOGY 105.3(2017):828-838.
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