globalchange  > 气候变化事实与影响
DOI: 10.1016/j.jag.2015.03.010
Scopus记录号: 2-s2.0-84943615070
论文题名:
Regional assessment of lake ecological states using Landsat: A classification scheme for alkaline-saline, flamingo lakes in the East African Rift Valley
作者: Tebbs E; J; , Remedios J; J; , Avery S; T; , Rowland C; S; , Harper D; M
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2015
卷: 40
起始页码: 100
结束页码: 108
语种: 英语
英文关键词: Alkaline-saline lakes ; Benthic diatoms ; Classification ; Cyanobacteria ; Landsat ; Lesser Flamingos
Scopus关键词: alkalinity ; benthos ; biomass ; cyanobacterium ; diatom ; environmental assessment ; lake ecosystem ; lake water ; Landsat ; salinity ; satellite imagery ; East African Rift ; Bacillariophyta ; Cyanobacteria ; Phoenicopteridae
英文摘要: In situ reflectance measurements and Landsat satellite imagery were combined to develop an optical classification scheme for alkaline-saline lakes in the Eastern Rift Valley. The classification allows the ecological state and consequent value, in this case to Lesser Flamingos, to be determined using Landsat satellite imagery. Lesser Flamingos depend on a network of 15 alkaline-saline lakes in East African Rift Valley, where they feed by filtering cyanobacteria and benthic diatoms from the lakes' waters. The classification developed here was based on a decision tree which used the reflectance in Landsat ETM+ bands 2-4 to assign one of six classes: low phytoplankton biomass; suspended sediment-dominated; microphytobenthos; high cyanobacterial biomass; cyanobacterial scum and bleached cyanobacterial scum. The classification accuracy was 77% when verified against in situ measurements. Classified imagery and timeseries were produced for selected lakes, which show the different ecological behaviours of these complex systems. The results have highlighted the importance to flamingos of the food resources offered by the extremely remote Lake Logipi. This study has demonstrated the potential of high spatial resolution, low spectral resolution sensors for providing ecologically valuable information at a regional scale, for alkaline-saline lakes and similar hypereutrophic inland waters. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79523
Appears in Collections:气候变化事实与影响

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作者单位: University of Leicester, Department of Physics and Astronomy, University Road, Leicester, United Kingdom; University of Leicester, Department of Biology, University Road, Leicester, United Kingdom; University of Leicester, Centre for Landscape and Climate Research, University Road, Leicester, United Kingdom; Centre for Ecology and Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster, United Kingdom

Recommended Citation:
Tebbs E,J,, Remedios J,et al. Regional assessment of lake ecological states using Landsat: A classification scheme for alkaline-saline, flamingo lakes in the East African Rift Valley[J]. International Journal of Applied Earth Observation and Geoinformation,2015-01-01,40
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