Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - Brazil
Temporal distributions of Paspalum repens at the mouth of the Caracu Stream on the left margin of the Paraná River were characterized and analyzed. Samples of Paspalum repens were taken monthly from March 1991 to February 1992. Fauna consisted of many taxa: Gastropoda, Oligochaeta, Copepoda, Ephemer...
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| Format: | Article |
| Language: | English |
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Instituto de Tecnologia do Paraná (Tecpar)
2000-01-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300012 |
| _version_ | 1811279332767694848 |
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| author | Gilza Maria de Souza-Franco Alice Michiyo Takeda |
| author_facet | Gilza Maria de Souza-Franco Alice Michiyo Takeda |
| author_sort | Gilza Maria de Souza-Franco |
| collection | DOAJ |
| description | Temporal distributions of Paspalum repens at the mouth of the Caracu Stream on the left margin of the Paraná River were characterized and analyzed. Samples of Paspalum repens were taken monthly from March 1991 to February 1992. Fauna consisted of many taxa: Gastropoda, Oligochaeta, Copepoda, Ephemeroptera, Hemiptera, Trichoptera, Lepidoptera, Chironomidae, Coleoptera and Hydracarina. With the exception of May 1991, low density of organisms was registered during the sampling period. During May 1991, a sharp decline in the Paraná River water level was noted. This fact suggested that organisms dispersed in the submersed vegetation during the flooding of the Paraná River must have concentrated in the stream margin and increased the density of organisms at this site. In June 1991, during the lowering of water level a niche reduction occurred. In subsequent months, invertebrates decreased due to predation and competition of many groups.<br>Este trabalho teve como objetivo caracterizar a fauna de invertebrados associada a P. repens da foz do riacho Caracu, verificar a distribuição temporal dos organismos, relacionando-o com fatores abióticos. O riacho Caracu situa-se na margem esquerda do rio Paraná, e as amostragens foram realizadas de março/91 a fevereiro/92. A fauna apresentou-se muito diversificada com vários táxons, sendo os mais abundantes: Gastropoda, Oligochaeta, Copepoda, Ephemeroptera, Hemiptera, Trichoptera, Lepidoptera, Chironomidae, Coleoptera, e Hydracarina. Durante o período de amostragem, verificou-se baixa densidade de organismos, exceto o mês de maio/91. Este mês caracterizou-se pelo acentuado declínio do nível fluviométrico do rio Paraná, sugerindo-se neste trabalho, que os organismos, antes espalhados na vegetação submersa com a inundação, provavelmente, concentraram-se na margem do riacho, aumentando a densidade. No mês seguinte, o nível da água estabilizou-se e, conseqüentemente, com o nicho reduzido, aumento da predação e competição, pode ter levado a diminuição da população de invertebrados nos meses subseqüentes. |
| first_indexed | 2024-04-13T00:52:43Z |
| format | Article |
| id | doaj.art-ff1cd60e8fa44bbcaf72938f639d73f4 |
| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-04-13T00:52:43Z |
| publishDate | 2000-01-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-ff1cd60e8fa44bbcaf72938f639d73f42022-12-22T03:09:50ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242000-01-0143331732510.1590/S1516-89132000000300012Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - BrazilGilza Maria de Souza-FrancoAlice Michiyo TakedaTemporal distributions of Paspalum repens at the mouth of the Caracu Stream on the left margin of the Paraná River were characterized and analyzed. Samples of Paspalum repens were taken monthly from March 1991 to February 1992. Fauna consisted of many taxa: Gastropoda, Oligochaeta, Copepoda, Ephemeroptera, Hemiptera, Trichoptera, Lepidoptera, Chironomidae, Coleoptera and Hydracarina. With the exception of May 1991, low density of organisms was registered during the sampling period. During May 1991, a sharp decline in the Paraná River water level was noted. This fact suggested that organisms dispersed in the submersed vegetation during the flooding of the Paraná River must have concentrated in the stream margin and increased the density of organisms at this site. In June 1991, during the lowering of water level a niche reduction occurred. In subsequent months, invertebrates decreased due to predation and competition of many groups.<br>Este trabalho teve como objetivo caracterizar a fauna de invertebrados associada a P. repens da foz do riacho Caracu, verificar a distribuição temporal dos organismos, relacionando-o com fatores abióticos. O riacho Caracu situa-se na margem esquerda do rio Paraná, e as amostragens foram realizadas de março/91 a fevereiro/92. A fauna apresentou-se muito diversificada com vários táxons, sendo os mais abundantes: Gastropoda, Oligochaeta, Copepoda, Ephemeroptera, Hemiptera, Trichoptera, Lepidoptera, Chironomidae, Coleoptera, e Hydracarina. Durante o período de amostragem, verificou-se baixa densidade de organismos, exceto o mês de maio/91. Este mês caracterizou-se pelo acentuado declínio do nível fluviométrico do rio Paraná, sugerindo-se neste trabalho, que os organismos, antes espalhados na vegetação submersa com a inundação, provavelmente, concentraram-se na margem do riacho, aumentando a densidade. No mês seguinte, o nível da água estabilizou-se e, conseqüentemente, com o nicho reduzido, aumento da predação e competição, pode ter levado a diminuição da população de invertebrados nos meses subseqüentes.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300012streamfaunaPaspalum repensParaná RiverBrazil |
| spellingShingle | Gilza Maria de Souza-Franco Alice Michiyo Takeda Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - Brazil Brazilian Archives of Biology and Technology stream fauna Paspalum repens Paraná River Brazil |
| title | Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - Brazil |
| title_full | Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - Brazil |
| title_fullStr | Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - Brazil |
| title_full_unstemmed | Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - Brazil |
| title_short | Invertebrates associated with Paspalum repens (Poaceae) at the mouth of Caracu Stream (1991-1992), affluent of the Paraná River, Porto Rico - PR - Brazil |
| title_sort | invertebrates associated with paspalum repens poaceae at the mouth of caracu stream 1991 1992 affluent of the parana river porto rico pr brazil |
| topic | stream fauna Paspalum repens Paraná River Brazil |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300012 |
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