干旱区生态环境知识资源中心(Arid): Estimated degradation of the Caatinga based on modern pollen rain deposited in reservoirs

Arid

DOI	10.1590/1677-941X-ABB-2022-0111
	Estimated degradation of the Caatinga based on modern pollen rain deposited in reservoirs
	Ledru, Marie-Pierre; Cassino, Raquel Franco; Gomes, Vaneicia dos Santos; Sfair, Julia Caram; Araujo, Francisca Soares
通讯作者	Ledru, MP
来源期刊	ACTA BOTANICA BRASILICA
ISSN	0102-3306
EISSN	1677-941X
出版年	2022
卷号	36
英文摘要	The vegetation cover is the result of many biological and abiotic interactions. To identify the different factors that cause changes is crucial when defining future sustainable development and protection of natural resources. In the Brazilian semiarid region, the vegetation cover has been subjected to drastic deforestation and land use at centennial-scale that has led to desertification. Pollen analysis is an efficient tool to reconstruct the different processes of degradation of the vegetation cover over time. We built a referential data set for the vegetation cover using 48 pollen surface samples collected in the reservoirs of the Cear pound. We used satellite images for comparison with the pollen signatures and defined an alteration score to express the correlation between terrestrial pollen and anthropic cover. Our results showed our surface samples to be generally representative of the vegetation cover and of the general degradation of the landscape. Our study areas can be considered as degraded as the initial categories preserved or intermediary are not reflected in the pollen assemblages, in agreement with results of botanical surveys and the historical background. The on-going process of desertification is climate-independent and was initiated many decades or centuries ago by intensive land use for agriculture and grazing.
英文关键词	palynology calibration tropical dry forest human impact Brazilian semiarid region degradation
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000885108500001
WOS关键词	LAND-USE ; VEGETATION ; HOLOCENE ; FOREST ; CLIMATE ; REGION ; PLANTS ; FLORA ; STATE ; DRY
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391527
推荐引用方式 GB/T 7714	Ledru, Marie-Pierre,Cassino, Raquel Franco,Gomes, Vaneicia dos Santos,et al. Estimated degradation of the Caatinga based on modern pollen rain deposited in reservoirs[J],2022,36.
APA	Ledru, Marie-Pierre,Cassino, Raquel Franco,Gomes, Vaneicia dos Santos,Sfair, Julia Caram,&Araujo, Francisca Soares.(2022).Estimated degradation of the Caatinga based on modern pollen rain deposited in reservoirs.ACTA BOTANICA BRASILICA,36.
MLA	Ledru, Marie-Pierre,et al."Estimated degradation of the Caatinga based on modern pollen rain deposited in reservoirs".ACTA BOTANICA BRASILICA 36(2022).