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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Registros recuperados : 4 | |
| 1. |  | NAVARRO, R. de C.; REICHARDT, K.; OLIVEIRA, J. C. M. de; FANTE JUNIOR, L.; DE LORENZO, A.; BACCHI, O. O. S.; VAZ, C. M. P.; RODRIGUES, J. A. Análise granulométrica de amostras de terra por diferentes metodologias. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 12., 1998, Fortaleza. Agricultura e sustentabilidade no semi-árido. Resumos expandidos... Fortaleza: SBCS: UFCE, 1998. p. 227-228. ref. 120.| Biblioteca(s): Embrapa Instrumentação. |
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| 2. | | DE LORENZO, A.; BACCHI, O. O. S.; FANTE JUNIOR, L.; OLIVEIRA, J. C. M. de; VAZ, C. M. P.; NAVARRO, R. de C.; BASSOI, L. H.; REICHARDT, K. Determinacao da densidade de um Podzolico Vermelho Amarelo plintico pela tecnica da tomografia computadorizada. In: REUNIAO BRASILEIRA DE MANEJO E CONSERVACAO DO SOLO E DA AGUA, 12., 1998, Fortaleza, CE. Agricultura e sustentabilidade no semi-arido: resumos expandidos. Fortaleza: SBCS/UFC-DCS, 1998. p. 87-88.| Biblioteca(s): Embrapa Instrumentação. |
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| 3. | | LORENZO, A. de; BACCHI, O. O. S.; FANTE JUNIOR, L.; OLIVEIRA, J. C. M. de; VAZ, C. M. P.; NAVARRO, R. de C.; BASSOI, L. H.; REICHARDT, K. Determinacao da densidade de um Podzolico Vermelho Amarelo plintico pela tecnica da tomografia computadorizada. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA AGUA, 12., 1998, Fortaleza. Agricultura e sustentabilidade no semi-arido: resumos expandidos. Fortaleza: SBCS/UFC-DCS, 1998. p. 87-88.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 4. | | DE LORENZO, A.; BACCHI, O. O. S.; FANTE JUNIOR, L.; OLIVEIRA, J. C. M. de; VAZ, C. M. P.; NAVARRO, R. de C.; BASSOI, L. H.; REICHARDT, K. Determinação da densidade de um podzólico vermelho amrelo plíntico pela técnica da tomografia computadorizada. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 12., 1998, Fortaleza. Agricultura e sustentabilidade no semi-árido. Resumos expandidos... Fortaleza: SBCS: UFCE, 1998. p. 87-88. ref. 046.| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 4 | |
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