Eutrophication of peatbogs: consequences of P and N enrichment for microbial and metazoan communities in mesocosm experiments

Aquatic Microbial Ecology

Barbara Pawlik-Skowrońska¹  Magdalena Toporowska¹  Małgorzata Adamczuk¹  Tomasz Mieczan¹ 

关键词: Bog;    Algae;    Bacteria;    Protists;    Rotifers;    Cladocera;    Copepoda;    Microbial food webs;   

DOI  :  10.3354/ame01727

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: Complex interactions between bacteria and protists are essential to the ecosystem ecology of peatbogs. However, little is known about how short-term changes in environmental conditions may influence microbial and metazoan communities. Microbial processes and parameters may be used as sensitive indicators of eutrophication. We address the hypothesis that an increase in the concentration of nutrients (in an experiment simulating eutrophication) will affect species richness and abundance of microorganisms and small metazoans and will cause changes in food web structure in different types of peatbogs. The experiments were performed in a Sphagnum peatland and a carbonate fen. Four experimental treatments were established (control and fertilised: +P, +N, P+N). An increase in habitat fertility was found to modify the taxonomic composition and functioning of microbial communities. This was reflected in a decrease in the species richness of testate amoebae and a substantial increase in the abundance of bacteria, flagellates and ciliates in both types of peatbogs. A better understanding of which parameters regulate microbial populations in peatbogs is critical for more accurate prediction of how peatbogs will respond to global change or anthropogenic disturbances.

【 授权许可】

Unknown