干旱区生态环境知识资源中心(Arid): Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities

Arid

	Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities
	Janisson Batista de Jesus; Tatiana Mora Kuplich; Ikaro Daniel de Carvalho Barreto; Cristiano Niederauer da Rosa; Fernando Luis Hillebrand
来源期刊	林业研究
ISSN	1007-662X
出版年	2021
卷号	32 期号:3 页码:1007-662X
英文摘要	Caatinga is a typical biome of Brazil's semiarid regions and subject to climate changes. Research is needed on the relation of its features to climate events. This study analyzed the influence of rainfall and its irregularities in open and dense woody Caatinga vegetation. Phenological curves were generated by means of Normalized Difference Vegetation Index (NDVI) time profiles in the Grota do Angico Conservation Unit study area in Sergipe State. Rainfall data from 2000 to 2018 were collected and phenological curves generated using various estimate methods that produced the following variables: [start of season, end of season, peak of season position, length of season, mean growing season and maximum seasonal]. Rainfall showed a standard intra-annual behavior, with inter-annual variations related to irregularities influencing Caatinga response. Dense Caatinga vegetation had higher values of NDVI in all periods, even in anomalous years compared to open Caatinga, in addition to having longer leaf coverage over the year, with an anticipated start and a more extended seasonal end. The analysis of the rainfall regime made it possible to assess its influence on the Caatinga and phenological profiles proved to be fundamental to understand periods of physiological change of open and dense Caatinga. These results indicate that dense Caatinga maintains physiological activity longer, which may be associated with greater moisture maintenance in a semiarid region. In addition, because it has a greater leaf cover for longer periods, the soil may be preserved and maintain its characteristics longer, reducing the effects of desertification. The results may be associated with the type of forest management and conservation in this region. The total or partial suppression of individual remnants of Caatinga should be avoided, since the most open areas have lower photosynthetic capacity, affected to a considerable extent from the effects of adverse climatic conditions. Additionally, open Caatinga has a reduced capacity for regenerating naturally and its use by communities in this semiarid region should be limited.
英文关键词	Semiarid Tropical dry forest NDVI MODIS Phenopix
类型	Article
语种	英语
国家	中国
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6974550
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365157
作者单位	Janisson Batista de Jesus, Postgraduate Program in Remote Sensing, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul CEP91501-970, Brazil.; Cristiano Niederauer da Rosa, Postgraduate Program in Remote Sensing, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul CEP91501-970, Brazil.; Fernando Luis Hillebrand, Postgraduate Program in Remote Sensing, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul CEP91501-970, Brazil.; Tatiana Mora Kuplich, National Institute for Space Research (INPE) Southern Regional Centre (CRS), Santa Maria, CEP97105-970, Brazil.; Ikaro Daniel de Carvalho Barreto, Postgraduate Program in Applied Biometrics and Statistics, Rural Federal University of Pernambuco, Recife, Penambuco CEP52171-900, Brazil.
推荐引用方式 GB/T 7714	Janisson Batista de Jesus,Tatiana Mora Kuplich,Ikaro Daniel de Carvalho Barreto,et al. Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities[J],2021,32(3):1007-662X.
APA	Janisson Batista de Jesus,Tatiana Mora Kuplich,Ikaro Daniel de Carvalho Barreto,Cristiano Niederauer da Rosa,&Fernando Luis Hillebrand.(2021).Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities.林业研究,32(3),1007-662X.
MLA	Janisson Batista de Jesus,et al."Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities".林业研究 32.3(2021):1007-662X.