Colonization of benthic invertebrates on artificial and natural substrate in a Neotropical lotic environment in Southern Brazil

Document title: Colonization of benthic invertebrates on artificial and natural substrate in a Neotropical lotic environment in Southern Brazil
Journal: Acta scientiarum. Biological sciences
System number: 000433594
ISSN: 1679-9283
Authors: 1
Institutions: 1Universidade Estadual do Parana, Departamento de Ciencias Biologicas, Uniao da Vitoria, Parana. Brasil
2Universidade Estadual de Maringa, Nucleo de Pesquisas em Limnologia, Maringa, Parana. Brasil
Volumen: 41
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Analítico, descriptivo
English abstract The objective of this research was to validate the colonization process on natural and artificial substrates by benthic invertebrates in a tropical stream in South Brazil. The samples were performed in July and August-2012, and 32 samplers were used, being 16 natural and 16 artificial substrates. In each sample, two replicas were taken for each substrate at the 2th, 4th, 7th, 14th, 21th28th, 35th and 42thdays of colonization. The organisms were identified to the lowest possible taxonomic level. In both substrates 3,070 benthic invertebrates were detected, of which 1,753 individuals were collected on the natural substrate, and 1,317 on the artificial substrate. From the identified taxa 8.5% were not dominant (Anacroneuria, Orthocladiinae, Tupiara, Smicridea, Baetodes, Tupiperla, Macrogynoplax, Gripopteryx, Cylloepus, Macrelmis, Microcylloepus, Hetaerina, Argia, Coryphaeschna, Atopsyche, Pomacea, Corydalus, Leptohyphes and Eccoptura), and31.5% were dominant (Tanypodinae, Chironominae, and Paragripopteryx). The genus Simulium was very common, dominant and abundant, representing 65% of the collected individuals. No significant difference was found in the abundance and species composition between artificial and natural substrates. On the natural substrate, the higher colonization index was at the 35th day with 459 individuals, and the lowest was at the 14th day, with 87. On the artificial substrate the highest index was at the 42thday with 337 individuals, and the lowest was at the 4th day, with 85. Both natural and artificial substrates are efficient in characterizing the benthic community. In the evaluation of the ecological succession, it was not possible to observe a pattern that described the process, since the composition was nearly constant throughout the study period
Disciplines: Biología
Keyword: Ecología,
Biología acuática,
Arroyos tropicales,
Invertebrados acuáticos,
Estructura de la comunidad
Keyword: Ecology,
Aquatic biology,
Tropical streams,
Aquatic invertebrates,
Community structure
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