Remote sensing of brine shrimp cysts in salt lakes

	Remote sensing of brine shrimp cysts in salt lakes
	Qi, Lin; Yao, Yao; English, David E.; Ma, Ronghua; Luft, John; Hu, Chuanmin
刊名	REMOTE SENSING OF ENVIRONMENT
	2021
卷号	266
英文摘要	Using laboratory and field experiments as well as spectral analysis of satellite images, we demonstrate that surface aggregations of brine shrimp (Artemia) cysts (BSC) in salt lakes can be identified unambiguously in satellite imagery. This is because of the unique reflectance spectral shapes of the BSC image slicks, where a sharp and monotonic increase in reflectance is found at wavelengths >550 nm and two inflection points are found around similar to 550 nm and similar to 650 nm. Such spectral characteristics differentiate BSC slicks from other floating matters. Based on this principle, a deep learning model is developed to extract BSC features from MERIS (Medium Resolution Imaging Spectrometer, 2002-2012) and OLCI (Ocean and Land Color Instrument, 2016 - present) satellite images to quantify BSC abundance, spatial distribution patterns, and their temporal changes in the Great Salt Lake (GSL), the world's largest contributor of BSC commercial products. A clear seasonality is found in BSC abundance, with the primary peak in April - May and secondary peak in October - November. The two peaks may be explained by food availability to brine shrimp. The inter-annual variability and the recent increasing trend in BSC abundance, on the other hand, are difficult to explain by fluctuations in wind, temperature, or salinity, while recent increase in commercial harvest does not appear to be associated with the variability in BSC abundance estimated by satellites. Because many salt lakes around the world, for example the Aral Sea, Lake Urmia, and the Dead Sea, also show BSC slicks in satellite imagery, this study suggests that it is possible to perform a systematic evaluation of BSC abundance and possibly brine shrimp populations in all major salt lakes, especially under a changing climate and increased human activities.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20316]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Qi, Lin,Yao, Yao,English, David E.,et al. Remote sensing of brine shrimp cysts in salt lakes[J]. REMOTE SENSING OF ENVIRONMENT,2021,266.
APA	Qi, Lin,Yao, Yao,English, David E.,Ma, Ronghua,Luft, John,&Hu, Chuanmin.(2021).Remote sensing of brine shrimp cysts in salt lakes.REMOTE SENSING OF ENVIRONMENT,266.
MLA	Qi, Lin,et al."Remote sensing of brine shrimp cysts in salt lakes".REMOTE SENSING OF ENVIRONMENT 266(2021).