干旱区生态环境知识资源中心(Arid): Archetypal temporal dynamics of arid and semi-arid rangelands

Arid

DOI	10.1016/j.rse.2020.112279
	Archetypal temporal dynamics of arid and semi-arid rangelands
	Bruzzone, O.; Easdale, M. H.
通讯作者	Easdale, MH (corresponding author), INTA CONICET, Inst Invest Forestales & Agr Bariloche IFAB, Av Modesta Victoria 4450, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
来源期刊	REMOTE SENSING OF ENVIRONMENT
ISSN	0034-4257
EISSN	1879-0704
出版年	2021
卷号	254
英文摘要	The way in which temporal dynamics structure ecological systems under the influence of a changing environment has long interested ecologists. Tackling the hierarchical structure of complex temporal patterns is a necessary step towards a more complete description of the fundamental nature of temporal dynamics in ecosystems. In pursuance of this task, remote sensing data provide valuable information to classify and describe functional features of ecosystems across scales. To approach the temporal complexity of ecosystems, we proposed a stepwise procedure based on combinations of big data techniques and time series analyses applied to data series of the Normalized Difference Vegetation Index (NDVI). The aim was to classify the temporal patterns and identify the differences in temporal dynamics of vegetation, by means of the frequency-domain and time-frequency domain components of a 20-year period of NDVI time series, respectively. In addition, we analysed the influence of climate in the temporal dynamics of vegetation. In particular, we applied archetype analysis to fast Fourier transform coefficients, using pixels as analytical units and frequencies as variables, of a large study area from North Patagonia, Argentina. Then, the most representative pixels for each archetype were used to analyse the explained variance by climatic predictor variables (temperature and precipitation) using a multiplicative model, whereas NDVI temporal dynamics was also described by means of time-frequency domain components with wavelet analysis, respectively. Six archetypes of temporal dynamics of arid and semi-arid rangelands were identified, as well as the main patterns of their distinctive frequencies through time and spatial location, respectively. The differences in temporal dynamics among archetypes were partly associated with climate and spatial features such as topography. The procedure was sensitive to capturing these temporal patterns, even those with a low data representation or noisy series while synthesizing information for an easy interpretation. Results are discussed in the light of future opportunities to combine this kind of information with other sources of information, aiming at the development of reliable land degradation and desertification assessment and monitoring tools.
英文关键词	Desertification Land degradation Time series analysis Time-frequency Fourier Wavelet
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000609166500004
WOS关键词	NET PRIMARY PRODUCTION ; ECOSYSTEM FUNCTIONAL TYPES ; LAND-COVER CHANGE ; CLIMATE-CHANGE ; TIME-SERIES ; INTERANNUAL VARIABILITY ; DESERTIFICATION ALTERS ; PRIMARY PRODUCTIVITY ; VEGETATION ; NDVI
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348145
作者单位	[Bruzzone, O.; Easdale, M. H.] INTA CONICET, Inst Invest Forestales & Agr Bariloche IFAB, Av Modesta Victoria 4450, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
推荐引用方式 GB/T 7714	Bruzzone, O.,Easdale, M. H.. Archetypal temporal dynamics of arid and semi-arid rangelands[J],2021,254.
APA	Bruzzone, O.,&Easdale, M. H..(2021).Archetypal temporal dynamics of arid and semi-arid rangelands.REMOTE SENSING OF ENVIRONMENT,254.
MLA	Bruzzone, O.,et al."Archetypal temporal dynamics of arid and semi-arid rangelands".REMOTE SENSING OF ENVIRONMENT 254(2021).