Functional redundancy in leaf-litter-associated aquatic hyphomycetes: Fine sediment alters community composition but hardly decomposer activity

2019 ◽  
Vol 105 (1-2) ◽  
pp. 44-51 ◽  
Author(s):  
Aingeru Martínez ◽  
Ana V. Lírio ◽  
Isabel Febra ◽  
João Rosa ◽  
Ana L. Gonçalves ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Community Composition ◽  
Functional Redundancy ◽  
Fine Sediment ◽  
Aquatic Hyphomycetes

scholarly journals Capões como Ilhas para Artrópodes no Pantanal

2013 ◽  
Vol 6 (3) ◽  
pp. 173-177 ◽  
Author(s):  
Rodrigo Aranda
Keyword(s):  
Leaf Litter ◽  
Community Composition ◽  
Riparian Vegetation ◽  
Flood Pulse ◽  
Soil Arthropods ◽  
Arthropod Community ◽  
Plastic Bags

A configuração do habitat é um dos fatores que pode influenciar a distribuição dos organismos. O pantanal por apresentar mosaico natural de formações se enquadra para testar tais afirmações. O presente estudo teve como objetivo avaliar se a distância e o tamanho de capões afetam a composição da comunidade de artrópodes testando a hipótese de que quanto maior e mais próximo o capão da mata ciliar, maior sua diversidade. Foram amostradas seis parcelas de 30 cm² em nove capões onde a serrapilheira e o solo foram coletados, acondicionados em sacos plásticos e posteriormente triados. Houve relação entre a composição da comunidade de artrópodes em relação à distância e o tamanho indicando que o pulso de inundação do último ano afetou de forma significativa a comunidade de artrópodes de solo em capões. O acompanhamento dos processos de recolonização dos capões é sugerido. Capons as Island for Arthropods in Pantanal Abstract. The configuration of habitat is one of the factors that influence the distribution of organisms. The Pantanal by presenting mosaic natural formations fit to test such claims. The present study aimed to evaluate the distance and size of riparian capons affect the community composition of arthropods tested the hypothesis that the higher and closer to the capon of riparian vegetation, the greater its diversity. We sampled six plots of 30 cm² in nine capons where the leaf-litter and soil were collected, placed in plastic bags and later sorted. There was a relationship between the composition of arthropod community in relation to distance and size indicating that the flood pulse of the last year significantly affected the community of soil arthropods in geldings. The monitoring of the processes of recolonization of the capons is suggested.

scholarly journals Relationships between fungal community composition in decomposing leaf litter and home‐field advantage effects

2019 ◽  
Vol 33 (8) ◽  
pp. 1524-1535 ◽  
Author(s):  
G. F. (Ciska) Veen ◽  
Basten L. Snoek ◽  
Tanja Bakx‐Schotman ◽  
David A. Wardle ◽  
Wim H. Putten
Keyword(s):  
Leaf Litter ◽  
Community Composition ◽  
Fungal Community ◽  
Fungal Community Composition ◽  
Home Field Advantage

scholarly journals Leaf and Root Litter Species Identity Influences Bacterial Community Composition in Short-Term Litter Decomposition

2020 ◽  
Author(s):  
Ying Lu ◽  
Kun Li ◽  
Ruiqiang Ni ◽  
Rongchu Han ◽  
Chuanrong Li ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Leaf Litter ◽  
Community Composition ◽  
Fine Roots ◽  
Bacterial Community Structure ◽  
Fine Root ◽  
Bacterial Community Composition ◽  
Litter Type ◽  
Opposite Result ◽  
Root Litter

Abstract Background: Microorganisms play a crucial role in litter decomposition in terrestrial ecosystems. However, it remains unclear, which effects of leaf litter and root species on bacterial community composition and diversity after one year's decomposition. Methods: The leaf and fine roots litters of Robinia pseudoacacia , Quercus acutissima , Pinus tabulaeformis and Pinus densiflora , which are the dominant afforestation species in Mount Tai, were analysed using the Nylon litterbag method and Illumina Miseq high-throughput sequencing for the amplification of bacterial 16S rRNA V4-V5. We measured the remaining litter mass and the bacterial community composition and assessed the effects of leaf and root litter species on the bacterial community after one-year decomposition periods.Results: (1) The remaining masses of leaf and fine roots litters of the four plant species were significantly influenced by organ type and species. The remaining mass of fine root litter was smaller than that of leaf litter for broad-leaved species, and the opposite result was found for coniferous species. (2) The observed species Chao1 and phylogenetic diversity values were significantly lower for leaf litters than for fine root litter. The community richness index was positively correlated with the C content, C:N and lignin content and negatively correlated with N:P, N content and P content. The bacterial community structure differed significantly among leaf and root litter decomposition for the four species ( p <0.05). The bacterial community structure in leaf litter was most highly correlated with the initial N content and N:P. The bacterial community structure in fine roots was most highly correlated with the lignin content. (3) The bacterial phyla Bacteroidetes , Acidobacteria and Gemmatimonadetes were significantly affected by litter and species type, and the relative abundances of Firmicutes and Chloroflexi were only affected by litter type. The relative abundances of Acidobacteria , Firmicutes and Chloroflexi in fine root litter were higher than those in leaf litter, while the opposite result was found for Bacteroidetes . The bacterial genera Burkholderia-Paraburkholderia , Sphingomonas and Mucilaginibacter were affected by litter type ( p <0.05). The relative abundance of Burkholderia-Paraburkholderia in fine root litter was higher than that in leaf litter, while the opposite result was found for Bradyrhizobium , Sphingomonas and Mucilaginibacter . Pearson correlation analysis showed that the average relative abundance of the dominant phyla and genera was affected by the initial litter properties, especially for Bacteroides , Acidobacteria , Burkholderia , and Sphingomonas . Conclusions: Litter type, interaction between litter type and species were important than species in shaping the bacterial diversity and community composition in decomposing litter. And this were affected by initial chemical properties of the litter.

Fungi and cellulolytic activity associated with decomposition of Bauhinia purpurea leaf litter in a polluted and unpolluted Hong Kong waterway

1992 ◽  
Vol 70 (5) ◽  
pp. 1071-1079 ◽  
Author(s):  
D. W. T. Au ◽  
I. J. Hodgkiss ◽  
L. L. P. Vrijmoed
Keyword(s):  
Leaf Litter ◽  
Geotrichum Candidum ◽  
Aquatic Hyphomycetes ◽  
Cellulolytic Activity ◽  
Mucor Racemosus ◽  
Trichoderma Spp ◽  
Complementary Sequence ◽  
Forest Stream ◽  
Bauhinia Purpurea

A survey of fungal succession on decomposing Bauhinia purpurea L. leaves in the unpolluted Tai Po Kau Forest Stream (TPKFS) and the animal waste polluted Lam Tsuen River (LTR) was carried out during the winter of 1988 and the summer of 1989. In situ cellulolytic activity of the TPKFS leaf litter was also investigated. Most of the 28 aquatic hyphomycete species found were cosmopolitan or frequently reported in temperate regions. Clavariopsis aquatica De Wildeman, Lunulospora cymbiformis Miura, and Flagellospora penicillioides Ingold were the dominant species at both sites. Among the 49 geofungi species recorded, lymaphilic species were commonly observed in the polluted LTR (e.g., Geotrichum candidum Link ex Leman, Fusarium oxysporum Schlecht, and Mucor racemosus Fres.) and lymaxenes in the TPKFS (e.g., Humicola spp., Trichoderma spp. and Gliocladium roseum Bain.). Species richness of aquatic hyphomycetes was higher in the TPKFS (27 species) than in the polluted LTR (14 species), whereas for the associated geofungi, it was higher in the LTR (35 species) than in the TPKFS (28 species). Conidial production was also higher in the TPKFS. Aquatic hyphomycetes and geofungi showed a complementary sequence of dominance in winter and summer, respectively, in the clean TPKFS. Higher cellulolytic activity occurred in the winter than the summer leaf litter. Key words: aquatic hyphomycetes, geofungi, leaf litter, pollution, cellulolytic activity.

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