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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
25/01/2017 |
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Data da última atualização: |
20/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LEAL, C. G.; POMPEU, P. S.; GARDNER, T. A.; LEITÃO, R. P.; HUGHES, R. M.; KAUFMANN, P. R.; ZUANON, J.; PAULA, F. R. de; FERRAZ, S. F. B.; THOMSON, J. R.; NALLY, R. M.; FERREIRA, J.; BARLOW, J. |
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Afiliação: |
Cecília G. Leal, UFLA / Lancaster University / MPEG; Paulo S. Pompeu, UFLA; Toby A. Gardner, Stockholm Environment Institute; Rafael P. Leitão, INPA; Robert M. Hughes, Oregon State University; Philip R. Kaufmann, U.S. Environmental Protection Agency; Jansen Zuanon, INPA; Felipe R. de Paula, ESALQ/USP; Silvio F. B. Ferraz, ESALQ/USP; James R. Thomson, The University of Canberra; Ralph Mac Nally, The University of Canberra; JOICE NUNES FERREIRA, CPATU; Jos Barlow, Lancaster University / MPEG. |
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Título: |
Multi-scale assessment of human-induced changes to Amazonian instream habitats. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Landscape Ecology, v. 31, n. 8, p. 1725-1745, Oct. 2016. |
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DOI: |
10.1007/s10980-016-0358-x |
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Idioma: |
Inglês |
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Conteúdo: |
Context: Land use change and forest degradation have myriad effects on tropical ecosystems. Yet their consequences for low-order streams remain very poorly understood, including in the world´s largest freshwater basin, the Amazon. Objectives: Determine the degree to which physical and chemical characteristics of the instream habitat of low-order Amazonian streams change in response to past local- and catchment-level anthropogenic disturbances. Methods: To do so, we collected field instream habitat (i.e., physical habitat and water quality) and landscape data from 99 stream sites in two eastern Brazilian Amazon regions. We used random forest regression trees to assess the relative importance of different predictor variables in determining changes in instream habitat response variables. Results: Multiple drivers, operating at multiple spatial scales, were important in determining changes in the physical habitat and water quality of the sites. Although we found few similarities in modelled relationships between the two regions, we observed non-linear responses of specific instream characteristics to landscape change; for example 20 % of catchment deforestation resulted in consistently warmer streams. Conclusions: Our results highlight the importance of local riparian and catchment-scale forest cover in shaping instream physical environments, but also underscore the importance of other land use changes and activities, such as road crossings and upstream agriculture intensification. In contrast to the property-scale focus of the Brazilian Forest code, which governs environmental regulations on private land, our results reinforce the importance of catchment-wide management strategies to protect stream ecosystem integrity. MenosContext: Land use change and forest degradation have myriad effects on tropical ecosystems. Yet their consequences for low-order streams remain very poorly understood, including in the world´s largest freshwater basin, the Amazon. Objectives: Determine the degree to which physical and chemical characteristics of the instream habitat of low-order Amazonian streams change in response to past local- and catchment-level anthropogenic disturbances. Methods: To do so, we collected field instream habitat (i.e., physical habitat and water quality) and landscape data from 99 stream sites in two eastern Brazilian Amazon regions. We used random forest regression trees to assess the relative importance of different predictor variables in determining changes in instream habitat response variables. Results: Multiple drivers, operating at multiple spatial scales, were important in determining changes in the physical habitat and water quality of the sites. Although we found few similarities in modelled relationships between the two regions, we observed non-linear responses of specific instream characteristics to landscape change; for example 20 % of catchment deforestation resulted in consistently warmer streams. Conclusions: Our results highlight the importance of local riparian and catchment-scale forest cover in shaping instream physical environments, but also underscore the importance of other land use changes and activities, such as road crossings and upstream agriculture intensificati... Mostrar Tudo |
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Palavras-Chave: |
Água doce bacia amazónica; Alteração do uso da terra; Gestão de bacias hidrográficas; Impactos antropogénicos. |
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Thesagro: |
Desmatamento; Floresta Tropical. |
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Thesaurus Nal: |
habitats. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02801naa a2200361 a 4500
001 2061809
005 2022-05-20
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s10980-016-0358-x$2DOI
100 1 $aLEAL, C. G.
245 $aMulti-scale assessment of human-induced changes to Amazonian instream habitats.$h[electronic resource]
260 $c2016
520 $aContext: Land use change and forest degradation have myriad effects on tropical ecosystems. Yet their consequences for low-order streams remain very poorly understood, including in the world´s largest freshwater basin, the Amazon. Objectives: Determine the degree to which physical and chemical characteristics of the instream habitat of low-order Amazonian streams change in response to past local- and catchment-level anthropogenic disturbances. Methods: To do so, we collected field instream habitat (i.e., physical habitat and water quality) and landscape data from 99 stream sites in two eastern Brazilian Amazon regions. We used random forest regression trees to assess the relative importance of different predictor variables in determining changes in instream habitat response variables. Results: Multiple drivers, operating at multiple spatial scales, were important in determining changes in the physical habitat and water quality of the sites. Although we found few similarities in modelled relationships between the two regions, we observed non-linear responses of specific instream characteristics to landscape change; for example 20 % of catchment deforestation resulted in consistently warmer streams. Conclusions: Our results highlight the importance of local riparian and catchment-scale forest cover in shaping instream physical environments, but also underscore the importance of other land use changes and activities, such as road crossings and upstream agriculture intensification. In contrast to the property-scale focus of the Brazilian Forest code, which governs environmental regulations on private land, our results reinforce the importance of catchment-wide management strategies to protect stream ecosystem integrity.
650 $ahabitats
650 $aDesmatamento
650 $aFloresta Tropical
653 $aÁgua doce bacia amazónica
653 $aAlteração do uso da terra
653 $aGestão de bacias hidrográficas
653 $aImpactos antropogénicos
700 1 $aPOMPEU, P. S.
700 1 $aGARDNER, T. A.
700 1 $aLEITÃO, R. P.
700 1 $aHUGHES, R. M.
700 1 $aKAUFMANN, P. R.
700 1 $aZUANON, J.
700 1 $aPAULA, F. R. de
700 1 $aFERRAZ, S. F. B.
700 1 $aTHOMSON, J. R.
700 1 $aNALLY, R. M.
700 1 $aFERREIRA, J.
700 1 $aBARLOW, J.
773 $tLandscape Ecology$gv. 31, n. 8, p. 1725-1745, Oct. 2016.
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| 5. |  | CARBONARI, T.; BARBIERI, R. L.; PADILHA, H. K. M.; NIETZKE, R. S.; VASCONCELOS, C. S. Acessos de abóbora-estrela (Cucurbita pepo) do banco ativo de germoplasma de cucurbitáceas da Embrapa Clima Temperado. In: CONGRESSO DE INICIAÇÃO CIENTÍFICA, 20.; MOSTRA CIENTÍFICA, 3., 2011, Pelotas. [Anais.]. Pelotas: UFPel, 2011. 1 CD-ROM. 3 p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| Registros recuperados : 48 | |
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