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https://hdl.handle.net/1822/67765
Título: | Dynamics of yeast populations recovered from decaying leaves in a nonpolluted stream: a 2-year study on the effects of leaf litter type and decomposition time |
Autor(es): | Sampaio, Ana Sampaio, José Paulo Leão, Cecília |
Palavras-chave: | Biodiversity Ecosystem Food Chain Plant Leaves Portugal Rivers Yeasts Leaf litter Decomposition Stream Succession yeast |
Data: | Jun-2007 |
Editora: | Oxford University Press |
Revista: | FEMS Yeast Research |
Citação: | Sampaio, A., Sampaio, J. P., & Leão, C. (2007). Dynamics of yeast populations recovered from decaying leaves in a nonpolluted stream: a 2-year study on the effects of leaf litter type and decomposition time. FEMS yeast research, 7(4), 595-603 |
Resumo(s): | Here we report on the results of a survey of the yeast populations occurring on submerged leaves (alder, eucalyptus and oak) in a natural mountain stream, during different phases of their decomposition and through two consecutive years. Leaf litter mass loss, total yeast counts, Shannon-Weiner index (H'), yeast community structure and physiologic abilities were analyzed to evaluate the dynamics of yeast communities during decay. Seventy-two yeast taxa were recorded, and in all litter types, species of basidiomycetous affinity predominated over ascomycetous ones. Discriminant analysis of presence/absence data (yeast species) showed significant differences both among substrate types (P<0.0026) and with decomposition time (P<0.0001). Carbon and nitrogen source utilization by yeast strains also varied with the substrate (P<0.0001) and decomposition time (P<0.0001). Further conclusions were that: (1) all litter types have in common ubiquitous yeast species, such as Cryptococcus albidus, Debaryomyces hansenii and Rhodotorula glutinis, among the common 20 yeast species; (2) only a few species were dominant, and most species were rare, being recorded once or twice throughout decomposition; and (3) the order of yeast appearance, and their substrate assimilation patterns, strongly suggest a succession phenomenon. Finally, explanations for the distribution patterns and variations in yeast communities are discussed. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/67765 |
DOI: | 10.1111/j.1567-1364.2007.00218.x |
ISSN: | 1567-1356 |
e-ISSN: | 1567-1364 |
Versão da editora: | https://academic.oup.com/femsyr/article/7/4/595/623634 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | ICVS - Artigos em revistas internacionais / Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Sampaio-2007-Dynamics-of-yeast-populations-recov.pdf | 274,52 kB | Adobe PDF | Ver/Abrir |