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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
25/06/2013 |
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Data da última atualização: |
07/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PAULA, F. R. de; GERHARD, P.; WENGER, S. J.; FERREIRA, A.; VETTORAZZI, C. A.; FERRAZ, S. F. de B. |
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Afiliação: |
FELIPE ROSSETTI DE PAULA, ESALQ; PEDRO GERHARD, CPATU; SETH J. WENGER, TROUT UNLIMITED; ANDERSON FERREIRA, CENA/USP; CPATU; CARLOS ALBERTO VETTORAZZI, ESALQ; SILVIO FROSINI DE BARROS FERRAZ, ESALQ. |
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Título: |
Influence of forest cover on in-stream large wood in an agricultural landscape of southeastern Brazil: a multi-scale analysis. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Landscape Ecology, v. 28, n. 1, p. 13-27, Jan. 2013. |
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DOI: |
10.1007/s10980-012-9809-1 |
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Idioma: |
Inglês |
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Conteúdo: |
Large wood (LW) is critical to the structure and function of streams and forests are the main LW source to stream channels. To assess the influence of forest cover changes at different spatial scales on in-stream LW quantity, we selected eighteen catchments (2nd?4th order) in Southeastern Brazil with forests at different levels of alterations. In each catchment we quantified the pattern of forest cover (% cover and relative catchment position), the physical characteristics of catchments (elevation and slope), the characteristics of channels (wetted channel width and depth), the abundance and volume of in-stream LW, and the frequency of LW pools. We used simple and multiple linear regression to assess the response of LW variables to landscape and stream reach variables. Most of the LW was relatively small; 72 % had a diameter <20 cm, and 66 % had a length <5 m. Although percent forest cover at reach scale had substantial support to explain LW variables, the best predictors of LW variables were forest cover at broader scales (LW abundance and LW pool frequency were best predicted by forest at intermediate distance at the catchment scale and LW volume was best predicted by forest cover at the drainage network scale), suggesting that downstream transport is an important process in addition to local processes in our study area. These findings have important management implications because although low forested reaches receive less LW from local forests (or no LW in the case of deforested stream reaches), they are receiving LW from upstream forested reaches. However, the material is generally small, unstable and likely to be easily flushed. This suggests that not only should riparian forest conservation encompass the full drainage network, but forests should also be allowed to regenerate to later successional stages to provide larger, higher quality LW for natural structuring of streams. MenosLarge wood (LW) is critical to the structure and function of streams and forests are the main LW source to stream channels. To assess the influence of forest cover changes at different spatial scales on in-stream LW quantity, we selected eighteen catchments (2nd?4th order) in Southeastern Brazil with forests at different levels of alterations. In each catchment we quantified the pattern of forest cover (% cover and relative catchment position), the physical characteristics of catchments (elevation and slope), the characteristics of channels (wetted channel width and depth), the abundance and volume of in-stream LW, and the frequency of LW pools. We used simple and multiple linear regression to assess the response of LW variables to landscape and stream reach variables. Most of the LW was relatively small; 72 % had a diameter <20 cm, and 66 % had a length <5 m. Although percent forest cover at reach scale had substantial support to explain LW variables, the best predictors of LW variables were forest cover at broader scales (LW abundance and LW pool frequency were best predicted by forest at intermediate distance at the catchment scale and LW volume was best predicted by forest cover at the drainage network scale), suggesting that downstream transport is an important process in addition to local processes in our study area. These findings have important management implications because although low forested reaches receive less LW from local forests (or no LW in the case of de... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Ecologia; Floresta. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02622naa a2200229 a 4500
001 1960506
005 2022-11-07
008 2013 bl uuuu u00u1 u #d
024 7 $a10.1007/s10980-012-9809-1$2DOI
100 1 $aPAULA, F. R. de
245 $aInfluence of forest cover on in-stream large wood in an agricultural landscape of southeastern Brazil$ba multi-scale analysis.$h[electronic resource]
260 $c2013
520 $aLarge wood (LW) is critical to the structure and function of streams and forests are the main LW source to stream channels. To assess the influence of forest cover changes at different spatial scales on in-stream LW quantity, we selected eighteen catchments (2nd?4th order) in Southeastern Brazil with forests at different levels of alterations. In each catchment we quantified the pattern of forest cover (% cover and relative catchment position), the physical characteristics of catchments (elevation and slope), the characteristics of channels (wetted channel width and depth), the abundance and volume of in-stream LW, and the frequency of LW pools. We used simple and multiple linear regression to assess the response of LW variables to landscape and stream reach variables. Most of the LW was relatively small; 72 % had a diameter <20 cm, and 66 % had a length <5 m. Although percent forest cover at reach scale had substantial support to explain LW variables, the best predictors of LW variables were forest cover at broader scales (LW abundance and LW pool frequency were best predicted by forest at intermediate distance at the catchment scale and LW volume was best predicted by forest cover at the drainage network scale), suggesting that downstream transport is an important process in addition to local processes in our study area. These findings have important management implications because although low forested reaches receive less LW from local forests (or no LW in the case of deforested stream reaches), they are receiving LW from upstream forested reaches. However, the material is generally small, unstable and likely to be easily flushed. This suggests that not only should riparian forest conservation encompass the full drainage network, but forests should also be allowed to regenerate to later successional stages to provide larger, higher quality LW for natural structuring of streams.
650 $aEcologia
650 $aFloresta
653 $aBrasil
700 1 $aGERHARD, P.
700 1 $aWENGER, S. J.
700 1 $aFERREIRA, A.
700 1 $aVETTORAZZI, C. A.
700 1 $aFERRAZ, S. F. de B.
773 $tLandscape Ecology$gv. 28, n. 1, p. 13-27, Jan. 2013.
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Embrapa Amazônia Oriental (CPATU) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
09/06/2000 |
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Data da última atualização: |
07/05/2012 |
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Autoria: |
CORRÊA-FERREIRA, B.S. |
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Título: |
Criacao massal do percevejo verde, Nezara viridula (L.). |
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Ano de publicação: |
1984 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 9., 1984, Londrina. Resumos... Londrina: SEB, [1984?]. |
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Páginas: |
p. 71. |
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Idioma: |
Português |
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Conteúdo: |
Com o objetivo de obter uma alta producao de ovos do percevejo Nezara viridula (L.) e uma reducao no tempo gasto com a manutencao da colonia, foi testada nova tecnica para criacao do percevejo, utilizando-se semente de soja seca como alimento. Usou-se, como unidade de criacao, gaiolas de 0,50 x 0,50 x 0,70m com armacao de madeira e tela de nylon, contendo como alimento sementes de soja coladas a tiras de papel e algodao embebido em agua. Para a criacao de aproximadamente 5000 insetos, um maximo de 1 hora/homem/dia foi necessaria para a coleta dos ovos e a manutencao da colonia, sendo que, por este sistema, o alimento e renovado apenas de dois em dois meses. Com a utilizacao desta nova metodologia para criacao de percevejos, alguns testes foram efetuados para verificar um possivel efeito do alimento (soja seca) no desenvolvimento desses insetos. Os resultados obtidos mostraram que nao houve influencia da alimentacao no ciclo biologico de N. viridula, verificando-se uma duracao de 30 a 32 dias no desenvolvimento de ovo a adulto, sendo que a duracao de cada instar ninfal tambem nao foi alterada. O periodo de pre-copula variou de 6 a 12 dias e o periodo de pre-oviposicao foi em media de 15 dias apos terem atingido o estadio adulto. Utilizando-se 40 casais/gaiola, obteve-se uma producao media mensal de 3252,5 ovos/gaiola, com uma media de 58,4 ovos/postura. |
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Palavras-Chave: |
Brasil; Insect; Pest; Soybean; Stink bug. |
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Thesagro: |
Criação Massal; Entomologia; Inseto; Nezara Viridula; Percevejo; Pesquisa; Praga; Soja. |
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Thesaurus NAL: |
Brazil; entomology; mass rearing; research. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02213naa a2200337 a 4500
001 1461964
005 2012-05-07
008 1984 bl uuuu u00u1 u #d
100 1 $aCORRÊA-FERREIRA, B.S.
245 $aCriacao massal do percevejo verde, Nezara viridula (L.).
260 $c1984
300 $ap. 71.
520 $aCom o objetivo de obter uma alta producao de ovos do percevejo Nezara viridula (L.) e uma reducao no tempo gasto com a manutencao da colonia, foi testada nova tecnica para criacao do percevejo, utilizando-se semente de soja seca como alimento. Usou-se, como unidade de criacao, gaiolas de 0,50 x 0,50 x 0,70m com armacao de madeira e tela de nylon, contendo como alimento sementes de soja coladas a tiras de papel e algodao embebido em agua. Para a criacao de aproximadamente 5000 insetos, um maximo de 1 hora/homem/dia foi necessaria para a coleta dos ovos e a manutencao da colonia, sendo que, por este sistema, o alimento e renovado apenas de dois em dois meses. Com a utilizacao desta nova metodologia para criacao de percevejos, alguns testes foram efetuados para verificar um possivel efeito do alimento (soja seca) no desenvolvimento desses insetos. Os resultados obtidos mostraram que nao houve influencia da alimentacao no ciclo biologico de N. viridula, verificando-se uma duracao de 30 a 32 dias no desenvolvimento de ovo a adulto, sendo que a duracao de cada instar ninfal tambem nao foi alterada. O periodo de pre-copula variou de 6 a 12 dias e o periodo de pre-oviposicao foi em media de 15 dias apos terem atingido o estadio adulto. Utilizando-se 40 casais/gaiola, obteve-se uma producao media mensal de 3252,5 ovos/gaiola, com uma media de 58,4 ovos/postura.
650 $aBrazil
650 $aentomology
650 $amass rearing
650 $aresearch
650 $aCriação Massal
650 $aEntomologia
650 $aInseto
650 $aNezara Viridula
650 $aPercevejo
650 $aPesquisa
650 $aPraga
650 $aSoja
653 $aBrasil
653 $aInsect
653 $aPest
653 $aSoybean
653 $aStink bug
773 $tIn: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 9., 1984, Londrina. Resumos... Londrina: SEB, [1984?].
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