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Metabarcoding-based fungal diversity on coarse and fine particulate organic matter in a first-order stream in Nova Scotia, Canada

Artikel i vetenskaplig tidskrift
Författare Christian Wurzbacher
Ivan J. Grimmett
Felix Bärlocher
Publicerad i F1000Research
Volym 4
Sidor 1378
ISSN 2046-1402
Publiceringsår 2016
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 1378
Språk en
Länkar f1000research.com/articles/4-1378/v...
Ämneskategorier Mikrobiologi, Bioinformatik och systembiologi, Terrestrisk ekologi, Limnisk ekologi, Etologi och beteendeekologi, Biologisk systematik

Sammanfattning

Most streams receive substantial inputs of allochthonous organic material in the form of leaves and twigs (CPOM, coarse particulate organic matter). Mechanical and biological processing converts this into fine particulate organic matter (FPOM). Other sources of particles include flocculated dissolved matter and soil particles. Fungi are known to play a role in the CPOM conversion process, but the taxonomic affiliations of these fungi remain poorly studied. The present study seeks to shed light on the composition of fungal communities on FPOM and CPOM as assessed in a natural stream in Nova Scotia, Canada. Maple leaves were exposed in a stream for four weeks and their fungal community evaluated through pyrosequencing. Over the same period, four FPOM size fractions were collected by filtration and assessed. Particles had much lower ergosterol contents than leaves, suggesting major differences in the extent of fungal colonization. Pyrosequencing documented a total of 821 fungal operational taxonomic units (OTU), of which 726 were exclusive to particles and 47 to leaf samples. Characterizing fungal communities may shed some light on the origins and processing pathways of fine particles in streams and broadens our view of the phylogenetic composition of fungi in freshwater ecosystems.

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