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Complexidade de habitat determinando padrões de aninhamento e turnover na comunidade de algas perifíticas. (2017)

Universidade Estadual de Maringá. Departamento de Biologia. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais.

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Publikationsdatum: 2022-05-24

Beschreibung: Considering that habitat complexity is directly linked to the maintenance of biodiversity in aquatic ecosystems, we carried out an field experiment to study the community structure of periphytic algae (richness, biomass, density and diversity) in artificial substrates with different degrees of complexity. We expected that greater structural complexity elevates the attributes of the periphytic community. We also evaluated whether the differences in species composition between substrates were the result of species turnover and/or nestedness. The experiment was carried out in situ, in a lagoon of the Upper Paraná River floodplain. Artificial macrophytes with different complexities were randomly incubated near a bank of natural macrophytes and removed after colonization of the periphyton for qualitative and quantitative analysis. The richness and diversity of species for both substrates did not differ. However, the biomass (chl a) and density of species differed between substrate types, with high biomass and density in the complex substrates. This result shows that although the source of propagules is the same, complex substrates provide space for a greater number of organisms, and that more simplified substrates alter the abundance of species. Our results also indicated that both nestedness and turnover affected the community structure of periphytic algae. Nestedness differed between simple and complex structures only when species abundance was considered; distinctly, species turnover was significantly different only when species occurrence was considered. Thus, we highlight the importance of habitat complexity in determining patterns of beta diversity (turnover and nestedness) allied to species abundance data for structuring the periphytic community.

Beschreibung: Considerando que a complexidade de habitat está diretamente ligada à manutenção da biodiversidade em ecossistemas aquáticos, realizou-se um experimento em campo para estudar a estrutura da comunidade de algas perifíticas (riqueza, biomasssa, densidade e diversidade) em substratos artificiais com diferentes graus de complexidades. Esperavamos que uma maior complexidade estrutural elevava os atributos da comunidade perifítica e também, se as diferenças na composição de espécies entre substratos foram o resultado do turnover de espécies e/ou aninhamento. O experimento foi realizado in situ em uma lagoa da planície de inundação do alto rio Paraná. Macrófitas artificiais com diferentes complexidades foram incubadas de forma aleatória, próximas à um banco de macrófitas naturais, e retiradas após a colonização do perifíton para análise qualitativa e quantitativa. A riqueza e diversidade de espécies para ambos os substratos não apresentaram diferenças significativas entre os distintos tipos de substratos. Porém, a biomassa (chl a) e densidade de espécies diferiram, com maior biomassa e densidade no substrato complexo. O resultado evidencia que, embora a fonte de propágulos seja a mesma, substratos complexos disponibilizam espaço para um maior número de organismos, e que substratos mais simplificados alteram a abundância de espécies de um sistema. Os dados obtidos indicaram que tanto o aninhamento quanto o turnover afetaram a estrutura da comunidade de algas perifíticas. O aninhamento diferiu entre estruturas simples e complexas somente quando a abundância de espécies foi considerada. Ao contrário, a substituição de espécies foi significativamente diferente somente quando consideramos a ocorrência de espécies. Para tanto, buscamos ressaltar a importância da complexidade de habitats em determinar padrões da diversidade beta (turnover e aninhamento) aliados aos dados de abundância de espécies para estruturação da comunidade perifítica.

Beschreibung: Masters

Schlagwort(e): Brazil ; Alto rio Paraná ; Planície de inundação ; Macrophyte architecture ; Brasil ; Simplified habitat ; Algae ; Periphyton ; Upper Paraná River ; Floodplain ; Complexidade de habitat ; Arquitetura ; Arquitetura da macrófita ; Diversidade beta ; Algas perifíticas ; Macrófitas aquáticas ; Comunidades, Ecologia de ; Perifíton ; Habitat simplificado ; Beta diversity

Repository-Name: AquaDocs

Materialart: Thesis/Dissertation

Format: 34pp.

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Fungal Planet description sheets: 1042–1111 (2020)

Crous, P.W. (Pedro Willem) ; Wingfield, M.J. ; Chooi, Y.-H. ; [weitere]

Naturalis Biodiversity Center

In: Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 44, pp. 301-459

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Publikationsdatum: 2024-05-08

Beschreibung: Novel species of fungi described in this study include those from various countries as follows: Antarctica, Cladosporium arenosum from marine sediment sand. Argentina, Kosmimatamyces alatophylus (incl. Kosmimatamyces gen. nov.) from soil. Australia, Aspergillus banksianus, Aspergillus kumbius, Aspergillus luteorubrus, Aspergillus malvicolor and Aspergillus nanangensis from soil, Erysiphe medicaginis from leaves of Medicago polymorpha, Hymenotorrendiella communis on leaf litter of Eucalyptus bicostata, Lactifluus albopicri and Lactifluus austropiperatus on soil, Macalpinomyces collinsiae on Eriachne benthamii, Marasmius vagus on soil, Microdochium dawsoniorum from leaves of Sporobolus natalensis, Neopestalotiopsis nebuloides from leaves of Sporobolus elongatus, Pestalotiopsis etonensis from leaves of Sporobolus jacquemontii, Phytophthora personensis from soil associated with dying Grevillea mccutcheonii. Brazil, Aspergillus oxumiae from soil, Calvatia baixaverdensis on soil, Geastrum calycicoriaceum on leaf litter, Greeneria kielmeyerae on leaf spots of Kielmeyera coriacea. Chile, Phytophthora aysenensis on collar rot and stem of Aristotelia chilensis. Croatia, Mollisia gibbospora on fallen branch of Fagus sylvatica. Czech Republic, Neosetophoma hnaniceana from Buxus sempervirens. Ecuador, Exophiala frigidotolerans from soil. Estonia, Elaphomyces bucholtzii in soil. France, Venturia paralias from leaves of Euphorbia paralias. India, Cortinarius balteatoindicus and Cortinarius ulkhagarhiensis on leaf litter. Indonesia, Hymenotorrendiella indonesiana on Eucalyptus urophylla leaf litter. Italy, Penicillium taurinense from indoor chestnut mill. Malaysia, Hemileucoglossum kelabitense on soil, Satchmopsis pini on dead needles of Pinus tecunumanii. Poland, Lecanicillium praecognitum on insects’ frass. Portugal, Neodevriesia aestuarina from saline water. Republic of Korea, Gongronella namwonensis from freshwater. Russia, Candida pellucida from Exomias pellucidus, Heterocephalacria septentrionalis as endophyte from Cladonia rangiferina, Vishniacozyma phoenicis from dates fruit, Volvariella paludosa from swamp. Slovenia, Mallocybe crassivelata on soil. South Africa, Beltraniella podocarpi, Hamatocanthoscypha podocarpi, Coleophoma podocarpi and Nothoseiridium podocarpi (incl. Nothoseiridium gen. nov.) from leaves of Podocarpus latifolius, Gyrothrix encephalarti from leaves of Encephalartos sp., Paraphyton cutaneum from skin of human patient, Phacidiella alsophilae from leaves of Alsophila capensis, and Satchmopsis metrosideri on leaf litter of Metrosideros excelsa. Spain, Cladophialophora cabanerensis from soil, Cortinarius paezii on soil, Cylindrium magnoliae from leaves of Magnolia grandiflora, Trichophoma cylindrospora (incl. Trichophoma gen. nov.) from plant debris, Tuber alcaracense in calcareus soil, Tuber buendiae in calcareus soil. Thailand, Annulohypoxylon spougei on corticated wood, Poaceascoma filiforme from leaves of unknown Poaceae. UK, Dendrostoma luteum on branch lesions of Castanea sativa, Ypsilina buttingtonensis from heartwood of Quercus sp. Ukraine, Myrmecridium phragmiticola from leaves of Phragmites australis. USA, Absidia pararepens from air, Juncomyces californiensis (incl. Juncomyces gen. nov.) from leaves of Juncus effusus, Montagnula cylindrospora from a human skin sample, Muriphila oklahomaensis (incl. Muriphila gen. nov.) on outside wall of alcohol distillery, Neofabraea eucalyptorum from leaves of Eucalyptus macrandra, Diabolocovidia claustri (incl. Diabolocovidia gen. nov.) from leaves of Serenoa repens, Paecilomyces penicilliformis from air, Pseudopezicula betulae from leaves of leaf spots of Populus tremuloides. Vietnam, Diaporthe durionigena on branches of Durio zibethinus and Roridomyces pseudoirritans on rotten wood. Morphological and culture characteristics are supported by DNA barcodes.

Schlagwort(e): Ecology ; Evolution ; Behavior and Systematics ; ITS nrDNA barcodes ; LSU ; new taxa ; systematics

Repository-Name: National Museum of Natural History, Netherlands

Materialart: info:eu-repo/semantics/article

Format: application/pdf