Seagrass vegetation and meiofauna enhance the bacterial abundance in the Baltic Sea sediments (Puck Bay)

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• 作者：Emilia Jankowska ; Katarzyna Jankowska…
• 关键词：Benthic bacteria ; Sediment characteristics ; Benthic communities ; Eelgrass meadows ; Baltic Sea
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：22
• 期：18
• 页码：14372-14378
• 全文大小：405 KB
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• 作者单位：Emilia Jankowska (1)
  Katarzyna Jankowska (2)
  Maria W?odarska-Kowalczuk (1)
  
  1. Institute of Oceanology Polish Academy of Sciences, Powstańców Warszawy 55, 81-712, Sopot, Poland
  2. Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233, Gdańsk, Poland
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

This study presents the first report on bacterial communities in the sediments of eelgrass (Zostera marina) meadows in the shallow southern Baltic Sea (Puck Bay). Total bacterial cell numbers (TBNs) and bacteria biomass (BBM) assessed with the use of epifluorescence microscope and Norland’s formula were compared between bare and vegetated sediments at two localities and in two sampling summer months. Significantly higher TBNs and BBM (PERMANOVA tests, P-lt;-.05) were recorded at bottom covered by the seagrass meadows in both localities and in both sampling months. The relationships between bacteria characteristics and environmental factors (grain size, organic matter, photopigments in sediments), meiofauna and macrofauna densities, as well as macrophyte vegetation characteristics (shoot density, phytobenthos biomass) were tested using PERMANOVA distance-based linear model (DISTLM) procedures and showed that the main factors explaining bacteria characteristics are bottom type (vegetated vs. unvegetated) and meiofauna density. These two factors explained together 48.3 % of variability in TBN and 40.5 % in BBM, and their impacts did not overlap (as indicated by DISTLM sequential tests) demonstrating the different natures of these relationships. The effects of seagrass were most probably related to the increase of organic matter and providing habitat while higher numbers of meiofauna organisms may have stimulated the bacterial growth by increased grazing. Keywords Benthic bacteria Sediment characteristics Benthic communities Eelgrass meadows Baltic Sea