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

DOI	10.1007/s11676-020-01145-3
	Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities
	de Jesus, Janisson Batista; Kuplich, Tatiana Mora; Barreto, Ikaro Daniel de Carvalho; da Rosa, Cristiano Niederauer; Hillebrand, Fernando Luis
通讯作者	de Jesus, JB
来源期刊	JOURNAL OF FORESTRY RESEARCH
ISSN	1007-662X
EISSN	1993-0607
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 ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000553999100001
WOS关键词	VEGETATION PHENOLOGY ; SOUTH-AMERICA ; TIME-SERIES ; RAINY DAYS ; FOREST ; NDVI ; VARIABILITY ; GREENNESS ; DYNAMICS ; RAINFALL
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/2XILL650/328122
作者单位	[de Jesus, Janisson Batista; da Rosa, Cristiano Niederauer; Hillebrand, Fernando Luis] Univ Fed Rio Grande do Sul, Postgrad Program Remote Sensing, Ave Bento Goncalves, BR-91501970 Porto Alegre, RS, Brazil; [Kuplich, Tatiana Mora] Southern Reg Ctr CRS, Natl Inst Space Res INPE, BR-97105970 Santa Maria, RS, Brazil; [Barreto, Ikaro Daniel de Carvalho] Rural Fed Univ Pernambuco, Postgrad Program Appl Biometr & Stat, Dom Manuel de Medeiros S-N, BR-52171900 Recife, PE, Brazil
推荐引用方式 GB/T 7714	de Jesus, Janisson Batista,Kuplich, Tatiana Mora,Barreto, Ikaro Daniel de Carvalho,et al. Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities[J].
APA	de Jesus, Janisson Batista,Kuplich, Tatiana Mora,Barreto, Ikaro Daniel de Carvalho,da Rosa, Cristiano Niederauer,&Hillebrand, Fernando Luis.
MLA	de Jesus, Janisson Batista,et al."Temporal and phenological profiles of open and dense Caatinga using remote sensing: response to precipitation and its irregularities".JOURNAL OF FORESTRY RESEARCH