Effects of the fungicide pyrimethanil on biofilm and organic matter processing in outdoor lentic mesocosms

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• 作者：Manuela Abelho ; Tiago Fortunato Martins ; Cândida Shinn…
• 关键词：Fungicide ; Anilinopyrimidine ; Aquatic ecosystem ; Decomposition ; Macroinvertebrates ; Biofilm
• 刊名：Ecotoxicology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：25
• 期：1
• 页码：121-131
• 全文大小：690 KB
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• 作者单位：Manuela Abelho (1) (2)
  Tiago Fortunato Martins (1)
  Cândida Shinn (2) (3)
  Matilde Moreira-Santos (2)
  Rui Ribeiro (2)
  
  1. Instituto Politécnico de Coimbra, Escola Superior Agrária, Bencanta, 3045-601, Coimbra, Portugal
  2. Centre for Functional Ecology (CFE), Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
  3. Escuela de Ciencias Agrícolas y Ambientales, Pontificia Universidad Católica del Ecuador – Sede Ibarra, Ibarra, Ecuador
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  Ecology
  Environmental Management
  
• 出版者：Springer Netherlands
• ISSN：1573-3017

文摘

The effect of the fungicide pyrimethanil (0.7 mg L−1) on biofilm development and alder leaf litter decomposition in aquatic ecosystems was assessed in outdoor lentic mesocosms immediately and 274 days after pyrimethanil application. Pyrimethanil decreased ergosterol concentrations (an indicator of fungal biomass) and the abundance and richness of the macroinvertebrate community associated with decomposing leaves. However, because neither fungi nor macroinvertebrates were main factors contributing to decomposition in this particular system, organic matter processing rates were not affected. After 274 days, pyrimethanil concentration in the water column was ≤0.004 mg L−1 but richness, biomass and composition of the invertebrate community associated with decomposing leaf-litter still showed the effect. The comparison of ergosterol (a molecule existing on both algae and fungal cell membranes), with chlorophyll (an indicator of algal biomass) associated with biofilm suggests that pyrimethanil may decrease fungal biomass and alter the relative abundance of algae and fungi on biofilm developing in control- and treated-mesocosms.