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首页> 外文期刊>Estuarine Coastal and Shelf Science >Microphytobenthos interannual variations in a north-European estuary (Loire estuary, France) detected by visible-infrared multispectral remote sensing
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Microphytobenthos interannual variations in a north-European estuary (Loire estuary, France) detected by visible-infrared multispectral remote sensing

机译：可见红外多光谱遥感在北欧河口（法国卢瓦尔河口）的微小底栖动物年际变化

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摘要

Estuarine intertidal sediments are colonized by photosynthetic microorganisms grouped under the generic term of microphytobenthos (MPB). These microbial assemblages form transient biofilms at the sediment surface and have important ecosystem functions. MPB biofilms are well known to exhibit high microscale patchiness whereas meso- and macroscale spatio-temporal structures are little known. In this work, satellite remote sensing was used to map MPB assemblages at such scales. MPB interannual distribution was investigated in the poly- and mesohaline domain of the north-European estuary (Loire estuary), using a multispectral SPOT image time series (1991-2009). The Normalized Difference Vegetation Index (NDVI) was calculated from two SPOT channels, XS2 and XS3, (red and near-infrared wavelengths, respectively). MPB biofilms were identified by NDVI values between 0 and 0.3. At the scale of the whole intertidal area, the results showed that MPB biofilms in the Loire estuary exhibited perennial structures in both the polyhaline and mesohaline sectors, occupying nearly 90% of the mudflat surfaces. MPB biofilm density was closely associated with intertidal position, with thicker biofilms developing mostly in the upper and middle shore, and formed kilometric longitudinal structures parallel to the shoreline. Mean NDVI values showed a strong positive correlation with mean seasonal air temperature (τ = 0.714, p ＜ 0.05 in the polyhaline domain and τ = 0.810, p ＜0.05 in the mesohaline domain), with a strong correlation in the upper intertidal mudflat (between +3 and 4 m isobaths). Negative wind effect was mainly detected in the upper intertidal areas, particularly between the +3 and 4 m isobaths (τ = -0.810, p ＜ 0.05 in the polvhaline domain andτ = -0.910 in the mesohaline).
机译：河口潮间带沉积物被光合微生物定居，该光合微生物归类于微植物底栖动物（Microphytobenthos，MPB）。这些微生物组合在沉积物表面形成瞬时生物膜，并具有重要的生态系统功能。众所周知，MPB生物膜表现出很高的微观斑片状斑点，而中尺度和时空结构却鲜为人知。在这项工作中，使用了卫星遥感技术以这种比例绘制MPB组合图。使用多光谱SPOT影像时间序列（1991-2009），研究了北欧河口（卢瓦尔河口）的多卤代甲烷和中卤代苯领域的MPB年际分布。从两个SPOT通道XS2和XS3（分别是红色和近红外波长）计算出归一化植被指数（NDVI）。 MPB生物膜的NDVI值介于0和0.3之间。在整个潮间带范围内，结果表明，卢瓦尔河口的MPB生物膜在多卤和中卤领域均表现出多年生结构，占据了近90％的滩涂表面。 MPB生物膜密度与潮间带位置密切相关，较厚的生物膜主要在上岸和中岸发育，并形成与海岸线平行的公里纵向结构。平均NDVI值与季节平均气温呈强正相关（在多卤水域τ= 0.714，p ＜0.05，在中卤海域τ= 0.810，p ＜0.05），在潮间带上滩滩之间（之间）等深线+3和4 m）。负风效应主要在潮间带上层地区发现，特别是在等高线的+3和4 m之间（τ= -0.810，在聚卵磷脂域中p ＜0.05，而在中灭弧区域τ= -0.910）。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2014年第1期|43-52|共10页
  • 作者

    Ismaiel Benyoucef; Elodie Blandin; Astrid Lerouxel; Bruno Jesus; Philippe Rosa; Vona Meleder; Patrick Launeau; Laurent Barille;

  • 作者单位

    LUNAM universite, Universite de Nantes, Mer Molecules Sante EA 2160, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France,LUNAM universite, Universite de Nantes, Laboratoire de Planetologie et Geodynamique UMR 6112, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France;

    LUNAM universite, Universite de Nantes, Mer Molecules Sante EA 2160, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France;

    LUNAM universite, Universite de Nantes, Mer Molecules Sante EA 2160, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France;

    LUNAM universite, Universite de Nantes, Mer Molecules Sante EA 2160, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France,Centra de Biodiversidade, Genomica Integrativa e Funcional (BioFIG), Faculdade de Ciencias, Universidade de Lisboa, Lisboa, Portugal;

    LUNAM universite, Universite de Nantes, Mer Molecules Sante EA 2160, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France;

    LUNAM universite, Universite de Nantes, Mer Molecules Sante EA 2160, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France;

    LUNAM universite, Universite de Nantes, Laboratoire de Planetologie et Geodynamique UMR 6112, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France;

    LUNAM universite, Universite de Nantes, Mer Molecules Sante EA 2160, Faculte des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    microphytobenthos; NDVI; remote sensing; SPOT; interannual variation; temperature;

    机译：微型底栖动物NDVI;遥感;点;年际变化;温度;

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