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Ascomycete diversity in soil‐feeding termite nests and soils from a tropical rainforest
Author(s) -
RooseAmsaleg Céline,
Brygoo Yves,
Harry Myriam
Publication year - 2004
Publication title -
environmental microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.954
H-Index - 188
eISSN - 1462-2920
pISSN - 1462-2912
DOI - 10.1111/j.1462-2920.2004.00579.x
Subject(s) - biology , rainforest , nest (protein structural motif) , soil water , tropical rainforest , ecology , biodiversity , tropics , soil microbiology , botany , biochemistry
Summary Molecular microbial ecology has revealed remarkable biodiversity – prokaryotic and eukaryotic – in numerous soil environments. However, no culture‐independent surveys of the termitosphere exists, although termites dominate tropical rainforests. Here, we focused on soil feeders, building nests with their soil‐born faeces, enriched with clay–organic complexes, thus contributing to the improvement of soil fertility. In order to assess the fungal community composition of these termitaries compared with soils not foraged by termites, samples of the two types were collected in the Lopé rainforest, Gabon, and processed for generation of fungal internal transcribed spacer (ITS) clone libraries. Although primers were universal, most of the recovered sequences represented Ascomycete that were previously uncharacterized and the proportions of which reached 72.5% in soils and 80% in termitaries. Their affiliation with identified fungi was analysed in performing a phylogenetic tree based on 5.8S rDNA. Furthermore, the ascomycete communities of soil‐feeding termitaries and soils shared only 6.3% of sequences. This discrepancy of composition between soil and nest may result from the building behaviour of termites, as the organic matter in the nest is chemically modified, and some vacant ecological microniches are available for more specialized fungi.