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Alternative Title: Impacts of vertical distribution of microphytobenthos biomass in surface tidal flat sediments on its remote sensing retrieval algorithms
Author: 李少朋 ; 邢前国
Source: 生态科学
ISSN: 1008-8873
Issued Date: 2014
Volume: 33, Issue:6, Pages:1155-1159
Keyword: 四十里湾 ; 底栖微藻 ; 叶绿素浓度 ; 垂直分布 ; 反射率 ; 潮滩
Rank: 中国科学院烟台海岸带研究所
Department: 海岸带信息集成与综合管理实验室
Abstract: 遥感信号与潮滩表层沉积物底栖微藻生物量的定量关系,与定义生物量对应的沉积物深度相关。以叶绿素浓度表征沉积物底栖微藻生物量,对烟台四十里湾潮滩表层沉积物柱样分别以3 mm和1mm间隔分层,分析研究其叶绿素垂直分布特征;模拟、分析以指数衰减曲线斜率表征的叶绿素垂直分布变化对叶绿素浓度遥感反演模式的影响。结果显示,潮滩表层1cm和3 cm内,叶绿素浓度均随着深度增加呈指数式衰减;垂直衰减曲线斜率逐渐变大时,沉积物表层1 cm内的叶绿素浓度逐渐降低,基于叶绿素浓度与光谱指数NDI-MPB间回归方程的遥感反演模式亦发生变化。
English Abstract: Chlorophyll-a concentration (Chl-a) of microphytobenthos of tidal flat sediments core was measured with a resolution of 3 mm and 1 mm in day time at the Sishili Bay; and surface reflectance of tidal flat was simultaneously measured. Chl-a remote sensing retrieval algorithm was established on the regression with the NDI-MPB (Normalized difference index of microphytobenthos) which was based on the reflectance at 675 nm and 700 nm. In situ data showed that Chl-a (proxy of microphytobenthos biomass in this study) decreased in an exponential function with the increase in depth, and the vertical distribution of Chl-a might be characterized by the slop of the exponentially decreasing model of Chl-a. The impacts of variations in the vertical distribution of Chl-a on the remote sensing retrieval algorithms were simulated, and results showed that Chl-a retrieval algorithms changed with its vertical distribution.
Funder: 中国科学院战略性先导科技专项
DOC Type: 期刊论文
Indexed Type: CSCD
Language: 中文
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Recommended Citation:
李少朋,邢前国. 潮滩底栖微藻生物量垂直变化对其遥感反演模式的影响[J]. 生态科学,2014,33(6):1155-1159.
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