Bio-optical evidence for increasing Phaeocystis dominance in the Barents Sea.
Bio-optical evidence for increasing Phaeocystis dominance in the Barents Sea.
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巴伦支海棕囊藻优势增强的生物光学证据。
DOI：
10.1098/rsta.2019.0357
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Orkney A
中科院分区：
文献类型：
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作者：
Orkney A
根据对浮游植物群落组成的观察，提出了浮游植物如PouchetiiPhaeocystis和Emiliania huxleyi对巴伦支海（BS）浮游植物产量的贡献越来越大，但这些记录的分散性和不连续性使得对群落变化或其与显著环境变量的关系的简单推断变得混乱。然而，只要浮游植物群落组成的有意义的评估可以推断出其光学特性的基础上，海洋颜色记录提供了一个潜在的手段来开发一个合成之间的sporadicin situobservations。现有的遥感算法检索浮游植物功能类型的基础上叶绿素-a（chl-a）浓度或指数的色素包装可能，但是，无法从其他水华的浮游植物与高色素包装，如硅藻phaeocystis。我们开发了一种新的算法来区分BS中的主要浮游植物功能类型，并将其应用于MODIS-Aqua海洋颜色记录，以研究2002年至2018年7月BS浮游植物水华组成的变化，创建颗石藻，硅藻和棕囊藻水华空间分布和强度的时间序列。我们证实了东北扩展的颗石藻水华分布，确定在以前的研究中，并建议推断增加氯浓度，由以前的研究人员报告，可能部分解释了增加频率ofPhaeocystisblooms.This文章的一部分，主题问题“变化的北冰洋：生物群落，地球化学过程和生态系统功能的后果”。
Increasing contributions of prymnesiophytes such asPhaeocystis pouchetiiandEmiliania huxleyito Barents Sea (BS) phytoplankton production have been suggested based onin situobservations of phytoplankton community composition, but the scattered and discontinuous nature of these records confounds simple inference of community change or its relationship to salient environmental variables. However, provided that meaningful assessments of phytoplankton community composition can be inferred based on their optical characteristics, ocean-colour records offer a potential means to develop a synthesis between sporadicin situobservations. Existing remote-sensing algorithms to retrieve phytoplankton functional types based on chlorophyll-a (chl-a) concentration or indices of pigment packaging may, however, fail to distinguishPhaeocystisfrom other blooms of phytoplankton with high pigment packaging, such as diatoms. We develop a novel algorithm to distinguish major phytoplankton functional types in the BS and apply it to the MODIS-Aqua ocean-colour record, to study changes in the composition of BS phytoplankton blooms in July, between 2002 and 2018, creating time series of the spatial distribution and intensity of coccolithophore, diatom andPhaeocystisblooms. We confirm a north-eastward expansion in coccolithophore bloom distribution, identified in previous studies, and suggest an inferred increase inchl-aconcentrations, reported by previous researchers, may be partly explained by increasing frequencies ofPhaeocystisblooms.This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning’.