Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil)
In two streches of the Itaúna stream, one in a gallery forest and the other in an herbaceous vegetation zone, litter matter input (sorted by leaves, ligneous and reproductive components) were measured during a year. In the gallery forest stretch, the direct input and lateral transport attained 713 g...
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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 |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300014 |
| _version_ | 1819208704037224448 |
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| author | Ana Adelina de O. Afonso Raoul Henry Rita C.S.Maimoni Rodella |
| author_facet | Ana Adelina de O. Afonso Raoul Henry Rita C.S.Maimoni Rodella |
| author_sort | Ana Adelina de O. Afonso |
| collection | DOAJ |
| description | In two streches of the Itaúna stream, one in a gallery forest and the other in an herbaceous vegetation zone, litter matter input (sorted by leaves, ligneous and reproductive components) were measured during a year. In the gallery forest stretch, the direct input and lateral transport attained 713 g.m-2.year-1 and 421 g.m-1. year-1, respectively. In contrast, the herbaceous vegetation stretch showed a direct litter input and lateral transport of only 86 g.m-2.year-1 and 124 g.m-1. year-1, respectively. The empoverishment of riparian vegetation had a significant effect on the decrease of allochthonous input to stream mainly by direct input. Peaks of direct input into Itaúna stream occurred during late dry season and in the early wet season. They were attributed to leaf fall from riparian trees and to enviromental conditions, such as wind. In March, which was the rainy season in this region, a peak of lateral transport was observed mainly in the herbaceous vegetation stretch, probably induced by runoff.<br>A introdução de serapilheira (separada em folhas, galhos e partes reprodutivas) foi medida, durante 1 ano, em dois trechos do Córrego Itaúna, um em zona de mata galeria e outro em zona de vegeta��ão herbácea. No trecho circundado por mata de galeria, a entrada direta e por transporte lateral atingiu 713 g.m-2.ano-1 e 421 g.m-1.ano-1, respectivamente. Por outro lado, no trecho circundado por vegetação herbácea, obteve-se valores de entrada direta de serapilheira e transporte lateral de somente 86 g.m-2.ano-1 e 124 g.m-1.ano-1, respectivamente. O empobrecimento da vegetação ripária teve um efeito significativo na diminuição da entrada alóctone para o curso d’água principalmente por via direta. Ocorreram picos de entrada de serapilheira para o Córrego Itaúna no final da estação seca e começo da estação chuvosa, atribuídos à queda de folhas das árvores ripárias e às condições ambientais, como vento. Em março, foi observado um pico de transporte lateral principalmente no trecho de vegetação herbácea, provavelmente devido ao escoamento superficial. |
| first_indexed | 2024-12-23T05:43:37Z |
| format | Article |
| id | doaj.art-b37a8c3218444779ae4d4c70d17904ca |
| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-12-23T05:43:37Z |
| publishDate | 2000-01-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-b37a8c3218444779ae4d4c70d17904ca2022-12-21T17:58:07ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242000-01-0143333534310.1590/S1516-89132000000300014Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil)Ana Adelina de O. AfonsoRaoul HenryRita C.S.Maimoni RodellaIn two streches of the Itaúna stream, one in a gallery forest and the other in an herbaceous vegetation zone, litter matter input (sorted by leaves, ligneous and reproductive components) were measured during a year. In the gallery forest stretch, the direct input and lateral transport attained 713 g.m-2.year-1 and 421 g.m-1. year-1, respectively. In contrast, the herbaceous vegetation stretch showed a direct litter input and lateral transport of only 86 g.m-2.year-1 and 124 g.m-1. year-1, respectively. The empoverishment of riparian vegetation had a significant effect on the decrease of allochthonous input to stream mainly by direct input. Peaks of direct input into Itaúna stream occurred during late dry season and in the early wet season. They were attributed to leaf fall from riparian trees and to enviromental conditions, such as wind. In March, which was the rainy season in this region, a peak of lateral transport was observed mainly in the herbaceous vegetation stretch, probably induced by runoff.<br>A introdução de serapilheira (separada em folhas, galhos e partes reprodutivas) foi medida, durante 1 ano, em dois trechos do Córrego Itaúna, um em zona de mata galeria e outro em zona de vegeta��ão herbácea. No trecho circundado por mata de galeria, a entrada direta e por transporte lateral atingiu 713 g.m-2.ano-1 e 421 g.m-1.ano-1, respectivamente. Por outro lado, no trecho circundado por vegetação herbácea, obteve-se valores de entrada direta de serapilheira e transporte lateral de somente 86 g.m-2.ano-1 e 124 g.m-1.ano-1, respectivamente. O empobrecimento da vegetação ripária teve um efeito significativo na diminuição da entrada alóctone para o curso d’água principalmente por via direta. Ocorreram picos de entrada de serapilheira para o Córrego Itaúna no final da estação seca e começo da estação chuvosa, atribuídos à queda de folhas das árvores ripárias e às condições ambientais, como vento. Em março, foi observado um pico de transporte lateral principalmente no trecho de vegetação herbácea, provavelmente devido ao escoamento superficial.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300014allochthonous inputstreamriparian vegetation |
| spellingShingle | Ana Adelina de O. Afonso Raoul Henry Rita C.S.Maimoni Rodella Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil) Brazilian Archives of Biology and Technology allochthonous input stream riparian vegetation |
| title | Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil) |
| title_full | Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil) |
| title_fullStr | Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil) |
| title_full_unstemmed | Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil) |
| title_short | Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil) |
| title_sort | allochthonous matter input in two different stretches of a headstream itatinga sao paulo brazil |
| topic | allochthonous input stream riparian vegetation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000300014 |
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