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✦   LIBER   ✦

Fungal and Bacterial Colonization of Submerged Leaf Litter in a Mediterranean Stream

✍ Scribed by Joan Artigas; Ainhoa Gaudes; Isabel Munoz; Anna M. Romani; Sergi Sabater

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
286 KB
Volume
96
Category
Article
ISSN
1434-2944

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✦ Synopsis

Microbial colonization dynamics of fungi and bacteria were analyzed in an intermittent Mediterranean forested stream using two different leaf substrata (Platanus acerifolia and Populus nigra). Results showed that fungal and bacterial biomass accumulation was stimulated on both leaves due to a flooding episode that increased dissolved inorganic nitrogen (DIN) and dissolved oxygen (DO) availability in the stream water. Leaf mass loss coincided with the parallel increase in microbial biomass and extracellular enzymatic activities after the flood event. Differences in litter quality favoured bacterial biomass accumulation and β-glucosidase and cellobiohydrolase enzymatic activities in the soft Populus species. Microbial heterotrophs colonization of submerged leaf litter and organic matter use in Mediterraneantype streams are modulated by environmental conditions, especially the hydrological variability.

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