Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10661-013-3486-7 |
Detecting new Buffel grass infestations in Australian arid lands: evaluation of methods using high-resolution multispectral imagery and aerial photography | |
Marshall, V. M.; Lewis, M. M.; Ostendorf, B. | |
通讯作者 | Marshall, V. M. |
来源期刊 | ENVIRONMENTAL MONITORING AND ASSESSMENT
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ISSN | 0167-6369 |
EISSN | 1573-2959 |
出版年 | 2014 |
卷号 | 186期号:3页码:1689-1703 |
英文摘要 | We assess the feasibility of using airborne imagery for Buffel grass detection in Australian arid lands and evaluate four commonly used image classification techniques (visual estimate, manual digitisation, unsupervised classification and normalised difference vegetation index (NDVI) thresholding) for their suitability to this purpose. Colour digital aerial photography captured at approximately 5 cm of ground sample distance (GSD) and four-band (visible-near-infrared) multispectral imagery (25 cm GSD) were acquired (14 February 2012) across overlapping subsets of our study site. In the field, Buffel grass projected cover estimates were collected for quadrates (10 m diameter), which were subsequently used to evaluate the four image classification techniques. Buffel grass was found to be widespread throughout our study site; it was particularly prevalent in riparian land systems and alluvial plains. On hill slopes, Buffel grass was often present in depressions, valleys and crevices of rock outcrops, but the spread appeared to be dependent on soil type and vegetation communities. Visual cover estimates performed best (r (2) 0.39), and pixel-based classifiers (unsupervised classification and NDVI thresholding) performed worst (r (2) 0.21). Manual digitising consistently underrepresented Buffel grass cover compared with field- and image-based visual cover estimates; we did not find the labours of digitising rewarding. Our recommendation for regional documentation of new infestation of Buffel grass is to acquire ultra-high-resolution aerial photography and have a trained observer score cover against visual standards and use the scored sites to interpolate density across the region. |
英文关键词 | Remote sensing Aerial photography High resolution Invasive species Natural resource management Cenchrus ciliaris Pennisetum ciliare |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000330715300029 |
WOS关键词 | PENNISETUM-CILIARE ; CENCHRUS-CILIARIS ; VEGETATION ; L. ; CONVERSION ; INVASIONS ; UPLAND |
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/2XILL650/181917 |
作者单位 | Univ Adelaide, Sch Earth & Environm Sci, Glen Osmond, SA, Australia |
推荐引用方式 GB/T 7714 | Marshall, V. M.,Lewis, M. M.,Ostendorf, B.. Detecting new Buffel grass infestations in Australian arid lands: evaluation of methods using high-resolution multispectral imagery and aerial photography[J],2014,186(3):1689-1703. |
APA | Marshall, V. M.,Lewis, M. M.,&Ostendorf, B..(2014).Detecting new Buffel grass infestations in Australian arid lands: evaluation of methods using high-resolution multispectral imagery and aerial photography.ENVIRONMENTAL MONITORING AND ASSESSMENT,186(3),1689-1703. |
MLA | Marshall, V. M.,et al."Detecting new Buffel grass infestations in Australian arid lands: evaluation of methods using high-resolution multispectral imagery and aerial photography".ENVIRONMENTAL MONITORING AND ASSESSMENT 186.3(2014):1689-1703. |
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Detecting new Buffel(1826KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 |
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