期刊
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
卷 374, 期 1764, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rstb.2018.0018
关键词
salt; aquatic hyphomycetes; decomposition; interactions; antagonism
类别
资金
- project 'FunctionalStreams' - French National Agency [ANR-14-CE01-0009-01]
- FCT/MEC
- FEDER, within the PT2020 Partnership Agreement
- COMPETE 2020 [UID/BIA/04004/2013]
- project ReNATURE-Valorization of the Natural Endogenous Resources of the Centro Region (Centro 2020) [Centro-01-0145-FEDER-000007]
- Agence Nationale de la Recherche (ANR) [ANR-14-CE01-0009] Funding Source: Agence Nationale de la Recherche (ANR)
Anthropogenic salinization of freshwater is a global problem with largely unknown consequences for stream functions. We compared the effects of salt addition (6 g l(-1) NaCl) in microcosms on leaf mass loss and microbial parameters in single- and multispecies assemblages of fungal strains (Heliscus lugdunensis, IIELU; Tetracladium marchalianum, TEMA; Flagellospora curta, FLCU) isolated from a reference (R) or salinized (S) stream. Fungal growth and interactions were also assessed. Salinization inhibited leaf decomposition and fungal biomass, but no differences were observed between species, strains or species combinations. Sporulation rates in monocultures were not affected by added salt, but differed among species (FLCU > HELU > TEMA), with S strains releasing more conidia. Fungal assemblages did not differ significantly in total conidia production (either between strains or medium salt concentration). HELU was the dominant species, which also had highest growth and most pronounced antagonistic behaviour. Fungal species, irrespective of origin, largely maintained their function in salinized streams. Strains from salt-contaminated streams did not trade-off conidial production for vegetative growth at high salt levels. The expected reduction of fungal diversity and potential changes in nutritional litter quality owing to salinization may impact leaf incorporation into secondary production in streams. This article is part of the theme issue 'Salt in freshwaters: causes, ecological consequences and future prospects'.
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