Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/1.JRS.6.063530 |
Assessment of Mediterranean pasture condition using MODIS normalized difference vegetation index time series | |
Fava, Francesco1; Colombo, Roberto2; Bocchi, Stefano3; Zucca, Claudio1,4 | |
通讯作者 | Fava, Francesco |
来源期刊 | JOURNAL OF APPLIED REMOTE SENSING
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ISSN | 1931-3195 |
出版年 | 2012 |
卷号 | 6 |
英文摘要 | The aim of this study was to evaluate the potential of MODIS normalized difference vegetation index hypertemporal data analysis for assessing Mediterranean pasture conditions in North Western Sardinia (Italy). During the seasons 2006 to 2007 and 2007 to 2008, field observations were carried out to classify 67 pasture sites in three condition classes based on expert knowledge. The local net primary productivity scaling (LNS) method was applied, and its potential for discriminating the pasture condition classes was evaluated by logistic regression models (LRM). Yearly and average LNS maps were generated for the period 2000 to 2008, and analyzed to identify areas that exhibited persistently low LNS values (hotspots). The LNS method proved useful to discriminate pastures in different conditions (LRM bootstrapped Nagelkerke pseudo R-2 = 0.52). The analysis of persistence of low LNS values allow identifying regional hotspots of degradation. A qualitative evaluation of the main hotspots on aerial photographs revealed that approximately 62% of the hotspots were clearly characterized by pasture degradation patterns, whereas the remaining were associated to highly fragmented landscapes or to errors in the land cover map. This result emphasizes the importance of using multiscale approaches by integrating the LNS regional assessment with high spatial resolution remote sensing data analysis. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JRS.6.063530] |
英文关键词 | local net primary productivity scaling moderate-resolution imaging spectroradiometer pasture condition time series Mediterranean land degradation |
类型 | Article |
语种 | 英语 |
国家 | Italy |
收录类别 | SCI-E |
WOS记录号 | WOS:000305399800002 |
WOS关键词 | LAND DEGRADATION ; RANGELAND DEGRADATION ; SOUTH-AFRICA ; NDVI ; DESERTIFICATION ; PERFORMANCE |
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/2XILL650/173159 |
作者单位 | 1.Univ Sassari, Desertificat Res Grp NRD, I-07100 Sassari, Italy; 2.Univ Milano Bicocca, Remote Sensing Environm Dynam Lab LTDA, Dept Environm Sci, I-20126 Milan, Italy; 3.Univ Milan, Dept Crop Sci, I-20133 Milan, Italy; 4.Univ Sassari, Dept Agr Sci, I-07100 Sassari, Italy |
推荐引用方式 GB/T 7714 | Fava, Francesco,Colombo, Roberto,Bocchi, Stefano,et al. Assessment of Mediterranean pasture condition using MODIS normalized difference vegetation index time series[J],2012,6. |
APA | Fava, Francesco,Colombo, Roberto,Bocchi, Stefano,&Zucca, Claudio.(2012).Assessment of Mediterranean pasture condition using MODIS normalized difference vegetation index time series.JOURNAL OF APPLIED REMOTE SENSING,6. |
MLA | Fava, Francesco,et al."Assessment of Mediterranean pasture condition using MODIS normalized difference vegetation index time series".JOURNAL OF APPLIED REMOTE SENSING 6(2012). |
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