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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: |
29/03/2012 |
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Data da última atualização: |
11/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PAULA, F. R. de; FERRAZ, S. F. de B.; GERHARD, P.; VETTORAZZI, C. A.; FERREIRA, A. |
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Afiliação: |
FELIPE ROSSETTI DE PAULA, ESALQ; SILVIO FROSINI DE BARROS FERRAZ, ESALQ; PEDRO GERHARD, CPATU; CARLOS ALBERTO VETTORAZZI, ESALQ; ANDERSON FERREIRA, USP. |
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Título: |
Large woody debris input and its influence on channel structure in agricultural lands of Southeast Brazil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Environmental Management, v. 48, n. 4, p. 750-763, Oct. 2011. |
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DOI: |
10.1007/s00267-011-9730-4 |
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Idioma: |
Inglês |
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Conteúdo: |
Riparian forests are important for the structure and functioning of stream ecosystems, providing structural components such as large woody debris (LWD). Changes in these forests will cause modifications in the LWD input to streams, affecting their structure. In order to assess the influence of riparian forests changes in LWD supply, 15 catchments (third and fourth order) with riparian forests at different conservation levels were selected for sampling. In each catchment we quantified the abundance, volume and diameter of LWD in stream channels; the number, area and volume of pools formed by LWD and basal area and tree diameter of riparian forest. We found that riparian forests were at a secondary successional stage with predominantly young trees (diameter at breast height \10 cm) in all studied streams. Results showed that basal area and diameter of riparian forest differed between the stream groups (forested and non-forested), but tree density did not differ between groups. Differences were also observed in LWD abundance, volume, frequency of LWD pools with subunits and area and volume of LWD pools. LWD diameter, LWD that form pools diameter and frequency of LWD pools without subunits did not differ between stream groups. Regression analyses showed that LWD abundance and volume, and frequency of LWD pools (with and without subunits) were positively related with the proportion of riparian forest. LWD diameter was not correlated to riparian tree diameter. The frequency of LWD pools was correlated to the abundance and volume of LWD, but characteristics of these pools (area and volume) were not correlated to the diameter of LWD that formed the pools. These results show that alterations in riparian forest cause modifications in the LWD abundance and volume in the stream channel, affecting mainly the structural complexity of these ecosystems (reduction in the number and structural characteristics of LWD pools). Our results also demonstrate that riparian forest conservation actions must consider not only its extension, but also successional stage to guarantee the quantity and quality of LWD necessary to enable the structuring of stream channels. MenosRiparian forests are important for the structure and functioning of stream ecosystems, providing structural components such as large woody debris (LWD). Changes in these forests will cause modifications in the LWD input to streams, affecting their structure. In order to assess the influence of riparian forests changes in LWD supply, 15 catchments (third and fourth order) with riparian forests at different conservation levels were selected for sampling. In each catchment we quantified the abundance, volume and diameter of LWD in stream channels; the number, area and volume of pools formed by LWD and basal area and tree diameter of riparian forest. We found that riparian forests were at a secondary successional stage with predominantly young trees (diameter at breast height \10 cm) in all studied streams. Results showed that basal area and diameter of riparian forest differed between the stream groups (forested and non-forested), but tree density did not differ between groups. Differences were also observed in LWD abundance, volume, frequency of LWD pools with subunits and area and volume of LWD pools. LWD diameter, LWD that form pools diameter and frequency of LWD pools without subunits did not differ between stream groups. Regression analyses showed that LWD abundance and volume, and frequency of LWD pools (with and without subunits) were positively related with the proportion of riparian forest. LWD diameter was not correlated to riparian tree diameter. The frequency of LWD... Mostrar Tudo |
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Palavras-Chave: |
Mata Atlântica. |
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Thesagro: |
Mata Ciliar. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
null
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Registros recuperados : 4 | |
| 1. |  | TONELLI, R.; CAMPOS, A. de; MATTOSO, L. H. C.; FRANCHETTI, S. M. M.; MARCONCINI, J. M. Biodegradação, caracterização mecânica e termogravimétrica do amido termoplástico (TPS). In: JORNADA CIENTÍFICA - EMBRAPA SÃO CARLOS, 2., 2010, São Carlos, SP. Anais... São Carlos: Embrapa Instrumentação Agropecuária: Embrapa Pecuária Sudeste, 2010. p. 49. (Embrapa Instrumentação Agropecuária. Documentos, 50).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 2. | | TONELLI, R.; CAMPOS, A. de; MATTOSO, L. H. C.; FRANCHETTI, S. M. M.; MARCONCINI, J. M. Biodegradation, mechanical and thermogravimetric characterization of thermoplastic starch (TPS). In: INTERNATIONAL MACROMOLECULAR COLLOQUIUM, 12.; INTERNATIONAL SYMPOSIUM ON NATURAL POLYMERS AND COMPOSITES-ISNaPol, 7., 2010, Gramado, RS. Meeting... [Porto Alegre]: UFRGS: ABPol, 2010. p. 1139-1141. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 3. | | CAMPOS, A. D.; TEIXEIRA, E.; TONELLI, R.; CORREA, A.; MARCONCINI, J.; MARTINS-FRANCHETTI, S.; MATTOSO, L. Mechanical properties of thermoplastic starch (TPS), polycaprolactone (PCL) and sisal fibers biocomposites reinforced with surface modified sisal fibers. In: MRS FALL MEETING, 2010. Boston. Abstracts... Warrendale: MRS, 2010. não paginado. 1CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 4. | | CAMPOS, A. de; TONELLI, R.; TEODORO, K. B. R.; MARCONCINI, J. M.; MARTINS-FRANCHETTI, S. M.; MATTOSO, L. H. C. Properties studies of starch/PCL/Sisal biocomposites to be applied with sisal nanocellulose. In: INTERNATIONAL CONFERENCE ON FOOD AND AGRICULTURE APPLICATIONS OF NANOTECHNOLOGIES - NanoAgri, 2010, São Pedro, SP. [Anais…] São Pedro: Aptor Software, 2010. Editors: Caue Ribeiro, Odílio Benedito Garrido de Assis, Luiz Henrique Capparelli Mattoso, Sérgio Mascarenhas.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 4 | |
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