Remote sensing of brine shrimp cysts in salt lakes
Remote sensing of brine shrimp cysts in salt lakes
复制标题
盐湖丰年虾包囊遥感
DOI：
10.1016/j.rse.2021.112695
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发表时间：
2021-12
影响因子：
13.5
通讯作者：
Chuanmin Hu
中科院分区：
文献类型：
--
作者：
Lin Qi;Yao Yao;David E. English;Ronghua Ma;John Luftc;Chuanmin Hu
通过实验室和现场实验以及卫星图像的光谱分析，我们证明可以在卫星图像中明确识别盐湖中丰年虫包囊（BSC）的表面聚集。这是因为 BSC 图像切片具有独特的反射光谱形状，在波长 >550 nm 处发现反射率急剧单调增加，并且在 ~550 nm 和 ~ 650 nm 附近发现两个拐点。这种光谱特性将 BSC 浮油与其他漂浮物区分开来。基于这一原理，我们开发了一种深度学习模型，从 MERIS（中分辨率成像光谱仪，2002-2012 年）和 OLCI（海洋和陆地颜色仪器，2016 年至今）卫星图像中提取 BSC 特征，以量化全球最大的 BSC 商业产品贡献者大盐湖 (GSL) 的 BSC 丰度、空间分布模式及其时间变化。 BSC丰度具有明显的季节性，主要高峰出现在4月至5月，次高峰出现在10月至11月。这两个峰值可以用丰年虾的食物供应来解释。另一方面，BSC丰度的年际变化和最近的增加趋势很难用风、温度或盐度的波动来解释，而最近商业收获的增加似乎与卫星估计的BSC丰度的变化无关。由于世界各地的许多盐湖，例如咸海、乌尔米耶湖和死海，也在卫星图像中显示出 BSC 浮光，因此这项研究表明，可以对所有主要盐湖中的 BSC 丰度和可能的丰年虾种群进行系统评估，特别是在气候变化和人类活动增加的情况下。
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 ~550 nm and ~ 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.
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DOI：
10.1002/eap.1864
发表时间：
2019-04
期刊：
Ecological applications : a publication of the Ecological Society of America
影响因子：
--
作者：
G. Belovsky;W. C. Perschon
通讯作者：
G. Belovsky;W. C. Perschon
影响因子：
8.2
作者：
B. Barnes;Chuanmin Hu;S. Bailey;B. Franz
通讯作者：
B. Barnes;Chuanmin Hu;S. Bailey;B. Franz
DOI：
10.1109/tgrs.2006.882258
发表时间：
2006-12-01
影响因子：
8.2
作者：
Gower, Jim;Hu, Chuanmin;King, Stephanie
通讯作者：
King, Stephanie
影响因子：
6.6
作者：
Lin Qi;Chuanmin Hu
通讯作者：
Lin Qi;Chuanmin Hu
影响因子：
2.7
作者：
G. Belovsky;D. Stephens;C. Perschon;P. Birdsey;Don S. Paul;D. Naftz;R. Baskin;Chad A. Larson;Chad Mellison;John Luft;Ryan Mosley;Heidi K. Mahon;J. V. Leeuwen;D. Allen
通讯作者：
G. Belovsky;D. Stephens;C. Perschon;P. Birdsey;Don S. Paul;D. Naftz;R. Baskin;Chad A. Larson;Chad Mellison;John Luft;Ryan Mosley;Heidi K. Mahon;J. V. Leeuwen;D. Allen