Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity

Detalhes bibliográficos
Autor(a) principal: Abril, Merixell
Data de Publicação: 2021
Outros Autores: Menéndez, Margarita, Ferreira, Verónica
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/98639
https://doi.org/10.1007/s00027-021-00810-x
Resumo: The efects of mixing diferent leaf litter species on litter decomposition in streams have received considerable attention in recent years. However, contrasting results have been reported and the mechanisms behind the efects of litter diversity have been poorly examined. We compared the decomposition rates and associated fungi for two contrasting litter species, when incubated individually and in mixture, at two diferent current velocities. Coarse-mesh bags with alder litter individually, oak litter individually and with a mixture of both were incubated in a forest headwater stream over 32 days, under fast or slow current velocities. We determined litter decomposition rates, microbial oxygen consumption rates, and aquatic hyphomycete sporulation rates, species richness and community composition; litter species in the mixture were processed individually. Our results provided weak evidences for diversity efects on leaf litter decomposition. Generally, litter decomposition was unafected by mixing contrasting litter species, with litter species in the mixture decomposing at the same rate as when incubated individually at both current velocities. The same pattern was observed for microbial variables. Decomposition rates and microbial colonization and activity depended primarily on the traits of the target litter species and were not afected by those of the companion species. However, litter-mixing efects were detected on oak litter at late decomposition stages under fast current velocity conditions, suggesting that both current velocity and the incubation time might infuence diversity efects on litter decomposition in streams. This fnding contributes to explain the lack of litter-mixing efects reported previously by many studies.
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spelling Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocityAquatic decomposersAquatic hyphomycetesFlow velocityDecomposition ratesLeaf litterDiversity efectsThe efects of mixing diferent leaf litter species on litter decomposition in streams have received considerable attention in recent years. However, contrasting results have been reported and the mechanisms behind the efects of litter diversity have been poorly examined. We compared the decomposition rates and associated fungi for two contrasting litter species, when incubated individually and in mixture, at two diferent current velocities. Coarse-mesh bags with alder litter individually, oak litter individually and with a mixture of both were incubated in a forest headwater stream over 32 days, under fast or slow current velocities. We determined litter decomposition rates, microbial oxygen consumption rates, and aquatic hyphomycete sporulation rates, species richness and community composition; litter species in the mixture were processed individually. Our results provided weak evidences for diversity efects on leaf litter decomposition. Generally, litter decomposition was unafected by mixing contrasting litter species, with litter species in the mixture decomposing at the same rate as when incubated individually at both current velocities. The same pattern was observed for microbial variables. Decomposition rates and microbial colonization and activity depended primarily on the traits of the target litter species and were not afected by those of the companion species. However, litter-mixing efects were detected on oak litter at late decomposition stages under fast current velocity conditions, suggesting that both current velocity and the incubation time might infuence diversity efects on litter decomposition in streams. This fnding contributes to explain the lack of litter-mixing efects reported previously by many studies.3F10-AC72-52D0 | Verónica Ferreirainfo:eu-repo/semantics/publishedVersion2021-06-17info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/98639http://hdl.handle.net/10316/98639https://doi.org/10.1007/s00027-021-00810-xengcv-prod-2633771Abril, MerixellMenéndez, MargaritaFerreira, Verónicainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-02-10T11:34:02Zoai:estudogeral.uc.pt:10316/98639Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:16:24.985973Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
title Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
spellingShingle Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
Abril, Merixell
Aquatic decomposers
Aquatic hyphomycetes
Flow velocity
Decomposition rates
Leaf litter
Diversity efects
title_short Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
title_full Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
title_fullStr Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
title_full_unstemmed Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
title_sort Decomposition of leaf litter mixtures in streams: effects of component litter species and current velocity
author Abril, Merixell
author_facet Abril, Merixell
Menéndez, Margarita
Ferreira, Verónica
author_role author
author2 Menéndez, Margarita
Ferreira, Verónica
author2_role author
author
dc.contributor.author.fl_str_mv Abril, Merixell
Menéndez, Margarita
Ferreira, Verónica
dc.subject.por.fl_str_mv Aquatic decomposers
Aquatic hyphomycetes
Flow velocity
Decomposition rates
Leaf litter
Diversity efects
topic Aquatic decomposers
Aquatic hyphomycetes
Flow velocity
Decomposition rates
Leaf litter
Diversity efects
description The efects of mixing diferent leaf litter species on litter decomposition in streams have received considerable attention in recent years. However, contrasting results have been reported and the mechanisms behind the efects of litter diversity have been poorly examined. We compared the decomposition rates and associated fungi for two contrasting litter species, when incubated individually and in mixture, at two diferent current velocities. Coarse-mesh bags with alder litter individually, oak litter individually and with a mixture of both were incubated in a forest headwater stream over 32 days, under fast or slow current velocities. We determined litter decomposition rates, microbial oxygen consumption rates, and aquatic hyphomycete sporulation rates, species richness and community composition; litter species in the mixture were processed individually. Our results provided weak evidences for diversity efects on leaf litter decomposition. Generally, litter decomposition was unafected by mixing contrasting litter species, with litter species in the mixture decomposing at the same rate as when incubated individually at both current velocities. The same pattern was observed for microbial variables. Decomposition rates and microbial colonization and activity depended primarily on the traits of the target litter species and were not afected by those of the companion species. However, litter-mixing efects were detected on oak litter at late decomposition stages under fast current velocity conditions, suggesting that both current velocity and the incubation time might infuence diversity efects on litter decomposition in streams. This fnding contributes to explain the lack of litter-mixing efects reported previously by many studies.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-17
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/98639
http://hdl.handle.net/10316/98639
https://doi.org/10.1007/s00027-021-00810-x
url http://hdl.handle.net/10316/98639
https://doi.org/10.1007/s00027-021-00810-x
dc.language.iso.fl_str_mv eng
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