干旱区生态环境知识资源中心(Arid): Remote sensing-based assessment of land degradation and drought impacts over terrestrial ecosystems in Northeastern Brazil

Arid

DOI	10.1016/j.scitotenv.2022.155490
	Remote sensing-based assessment of land degradation and drought impacts over terrestrial ecosystems in Northeastern Brazil
	de Oliveira, Michele L.; dos Santos, Carlos A. C.; de Oliveira, Gabriel; Silva, Madson T.; da Silva, Bernardo B.; Cunha, John E. de B. L.; Ruhoff, Anderson; Santos, Celso A. G.
通讯作者	dos Santos, CAC
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	835
英文摘要	The spatio-temporal assessment of water and carbon fluxes in Brazil's Northeast region (NEB) allows for a better understanding of these surface flux patterns in areas with different vegetation physiognomies. The NEB is divided into four biomes: Amazon, Cerrado, Caatinga, and Atlantic Forest. Land degradation is a growing problem, particularly in susceptible areas of the Caatinga biome, such as the seasonally dry tropical forest. Furthermore, this region has experienced climatic impacts, such as severe droughts. Due to increasing human pressure, the Caatinga's natural land cover undergoes drastic changes, making it a region particularly vulnerable to desertification. In this study, the Moderate Resolution Imaging Spectroradiometer (MODIS) estimates of evapotranspiration (ET) and gross primary production (GPP) were validated in two contrasting areas, dense Caatinga and sparse Caatinga, using eddy covariance (EC) data and then investigated their behavior over 21 years (2000-2021) for the NEB. MODIS products explained around 60% of the variations in ET and GPP, showing higher accuracy in dense Caatinga, while areas of sparse Caatinga presented the lowest GPP, indicating that land degradation has reduced the photosynthetic activity of the vegetation in this area. Based on the analysis of ET and GPP over 21 years, we observed a greater dependence of the sparse Caatinga on climate variability, demonstrating a stronger resilience of dense Caatinga to climate effects. In comparison with the other biomes of the NEB region, we found lower rates of ET and GPP in the Caatinga biome, with averages similar to the Sparse Caatinga. In comparison with the other biomes in the NEB region, we found the lowest averages of ET and GPP in the Caatinga biome, similar to values found in the sparse Caatinga. In forest areas, similar to the monitored DC, they allowed the Caatinga to behave closer to the other biomes present in the region.
英文关键词	Caatinga Evapotranspiration Carbon balance Eddy covariance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000833000700010
WOS关键词	GROSS PRIMARY PRODUCTION ; WATER-USE EFFICIENCY ; EDDY COVARIANCE MEASUREMENTS ; DRY TROPICAL FOREST ; CARBON-DIOXIDE ; GLOBAL CARBON ; MODIS-GPP ; EVAPOTRANSPIRATION ; CAATINGA ; PRODUCT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394381
推荐引用方式 GB/T 7714	de Oliveira, Michele L.,dos Santos, Carlos A. C.,de Oliveira, Gabriel,et al. Remote sensing-based assessment of land degradation and drought impacts over terrestrial ecosystems in Northeastern Brazil[J],2022,835.
APA	de Oliveira, Michele L..,dos Santos, Carlos A. C..,de Oliveira, Gabriel.,Silva, Madson T..,da Silva, Bernardo B..,...&Santos, Celso A. G..(2022).Remote sensing-based assessment of land degradation and drought impacts over terrestrial ecosystems in Northeastern Brazil.SCIENCE OF THE TOTAL ENVIRONMENT,835.
MLA	de Oliveira, Michele L.,et al."Remote sensing-based assessment of land degradation and drought impacts over terrestrial ecosystems in Northeastern Brazil".SCIENCE OF THE TOTAL ENVIRONMENT 835(2022).