Análise de agrupamento da vegetação de um fragmento de Floresta Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil
In the state of Rio Grande do Sul, the riparian forests have been altered and fragmented by human activity. The objective of this study was to analyze the structure and floristic composition of these forests, therefore providing information for the re-establishment of these ecosystems. The study s...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Portuguese |
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Universidade Federal de Santa Maria
2004-01-01
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| Series: | Ciência Florestal |
| Online Access: | http://www.redalyc.org/articulo.oa?id=53414115 |
| _version_ | 1818311197803413504 |
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| author | Maristela Araujo Machado Solon Jonas Longhi Doádi Antônio Brena Paulo Luiz Barros Contente de Sílvio Franco |
| author_facet | Maristela Araujo Machado Solon Jonas Longhi Doádi Antônio Brena Paulo Luiz Barros Contente de Sílvio Franco |
| author_sort | Maristela Araujo Machado |
| collection | DOAJ |
| description | In the state of Rio Grande do Sul, the riparian forests have been altered and fragmented by human
activity. The objective of this study was to analyze the structure and floristic composition of these forests,
therefore providing information for the re-establishment of these ecosystems. The study site is a 4 ha fragment
located in Cachoeira do Sul- RS, low Jacuí River (30o04´36S; 52o53´09W). The arboreal and shrubby
species and lianas (only life-form) were inventoried using 10 m wide strips that were laid out perpendicular to
the river and spaced at 50 m intervals. The strips were divided into 10 x 10 m plots. Within each
plot all a individuals with girth at breast height SBH ³ 15 were identified and their circumference and height
measured. Species density data were entered into a matrix (70 x 42) that was used for multivariate analysis.
The presence of species clusters at the interior of the fragment was analysed with TWINSPAN (Two-way
indicator species analysis), which identified the existence of three forest sub-formations (S-F1, S-F2 e S-F3). S F1 was characterized by a higher influence of flooding and the ground water table was closer to the surface; SF2
occurred in the central part of the fragment, but presented a strong influence of flooding provided by
inundation; and S-F3, also in the central part of the fragment, occurred the greatest influence from the ground
water table. The indicator species of the three forest sub formations were Sebastiania commersoniana and
Eugenia uniflora (S-F1); Gymnanthes concolor, Cupania vernalis and Seguieria aculeata (S-F2); and
Casearia sylvestris and Allophylus edulis (S-F3). Therefore, in preservation projects, conservation and reestablishment
of these ecosystems, the forest community cannot be treated as riparian only, but environmental
and, consequently, floristics variations should be considered. |
| first_indexed | 2024-12-13T07:58:08Z |
| format | Article |
| id | doaj.art-b2f17dc5a94f42d9aa0fba836eac4859 |
| institution | Directory Open Access Journal |
| issn | 0103-9954 1980-5098 |
| language | Portuguese |
| last_indexed | 2024-12-13T07:58:08Z |
| publishDate | 2004-01-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Florestal |
| spelling | doaj.art-b2f17dc5a94f42d9aa0fba836eac48592022-12-21T23:54:30ZporUniversidade Federal de Santa MariaCiência Florestal0103-99541980-50982004-01-01141133147Análise de agrupamento da vegetação de um fragmento de Floresta Estacional Decidual Aluvial, Cachoeira do Sul, RS, BrasilMaristela Araujo MachadoSolon Jonas LonghiDoádi Antônio BrenaPaulo Luiz Barros Contente deSílvio FrancoIn the state of Rio Grande do Sul, the riparian forests have been altered and fragmented by human activity. The objective of this study was to analyze the structure and floristic composition of these forests, therefore providing information for the re-establishment of these ecosystems. The study site is a 4 ha fragment located in Cachoeira do Sul- RS, low Jacuí River (30o04´36S; 52o53´09W). The arboreal and shrubby species and lianas (only life-form) were inventoried using 10 m wide strips that were laid out perpendicular to the river and spaced at 50 m intervals. The strips were divided into 10 x 10 m plots. Within each plot all a individuals with girth at breast height SBH ³ 15 were identified and their circumference and height measured. Species density data were entered into a matrix (70 x 42) that was used for multivariate analysis. The presence of species clusters at the interior of the fragment was analysed with TWINSPAN (Two-way indicator species analysis), which identified the existence of three forest sub-formations (S-F1, S-F2 e S-F3). S F1 was characterized by a higher influence of flooding and the ground water table was closer to the surface; SF2 occurred in the central part of the fragment, but presented a strong influence of flooding provided by inundation; and S-F3, also in the central part of the fragment, occurred the greatest influence from the ground water table. The indicator species of the three forest sub formations were Sebastiania commersoniana and Eugenia uniflora (S-F1); Gymnanthes concolor, Cupania vernalis and Seguieria aculeata (S-F2); and Casearia sylvestris and Allophylus edulis (S-F3). Therefore, in preservation projects, conservation and reestablishment of these ecosystems, the forest community cannot be treated as riparian only, but environmental and, consequently, floristics variations should be considered.http://www.redalyc.org/articulo.oa?id=53414115 |
| spellingShingle | Maristela Araujo Machado Solon Jonas Longhi Doádi Antônio Brena Paulo Luiz Barros Contente de Sílvio Franco Análise de agrupamento da vegetação de um fragmento de Floresta Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil Ciência Florestal |
| title | Análise de agrupamento da vegetação de um fragmento de Floresta
Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil |
| title_full | Análise de agrupamento da vegetação de um fragmento de Floresta
Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil |
| title_fullStr | Análise de agrupamento da vegetação de um fragmento de Floresta
Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil |
| title_full_unstemmed | Análise de agrupamento da vegetação de um fragmento de Floresta
Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil |
| title_short | Análise de agrupamento da vegetação de um fragmento de Floresta
Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil |
| title_sort | analise de agrupamento da vegetacao de um fragmento de floresta estacional decidual aluvial cachoeira do sul rs brasil |
| url | http://www.redalyc.org/articulo.oa?id=53414115 |
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