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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
20/02/2013 |
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Data da última atualização: |
06/06/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AGUIAR, M. I. de; FIALHO, J. S.; ARAÚJO, F. das C. S. de; CAMPANHA, M. M.; OLIVEIRA, T. S. de. |
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Afiliação: |
MONICA MATOSO CAMPANHA, CNPMS. |
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Título: |
Does biomass production depend on plant community diversity? |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Agroforestry Systems, Dordrecht, v. 87, n. 3, p. 699-711, 2013. |
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DOI: |
10.1007/s10457-012-9590-9 |
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Idioma: |
Inglês |
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Conteúdo: |
In order to ensure the sustainability of agroecosystems, biodiversity must be a priority. Agroforestry, which includes trees, is an example of such diverse systems. We evaluated plant diversity and aboveground biomass production to assess whether areas under fallow following traditional cultivation return to their initial condition. Also, plant diversity and aboveground biomass production were assessed in agroforestry systems (AFS) to determine if these were similar to unmanaged ecosystems. Another objective of the study was to observe the influence of plant diversity on aboveground biomass production in plant communities and also in the population of the dominant species, Cordia oncocalyx. Plant diversity was evaluated by assessing species richness, as well as using Shannon’s (H0) and Pielou’s (J0) indices. Aboveground plant biomass was evaluated in two AFS: agrosilvopastoral (ASP) and silvopastoral (SP), and also in a traditionally managed agricultural system (AG), areas that had been under fallow for six years (F6) and nine years (F9) and an area of unmanaged caatinga (CAT) vegetation. We observed that the ASP system had a lower diversity and number of species, especially tree species. However, it sustained the same total biomass production as CAT and fallow areas. The SP system, despite having lower H0 and J0 indices as well as lower total biomass production, had a similar number of species to CAT and cropped and fallow systems AG, F6 and F9. Plant biomass in F6 and F9 had recovered to productivity levels of unmanaged CAT vegetation; however the diversity indices were not restored to the same level. Plant diversity did not have an effect on the productivity of the agroecosystems. Likewise, annual biomass production by C. oncocalyx is not dependent upon diversity, but it is influenced by the growth stage of individuals. MenosIn order to ensure the sustainability of agroecosystems, biodiversity must be a priority. Agroforestry, which includes trees, is an example of such diverse systems. We evaluated plant diversity and aboveground biomass production to assess whether areas under fallow following traditional cultivation return to their initial condition. Also, plant diversity and aboveground biomass production were assessed in agroforestry systems (AFS) to determine if these were similar to unmanaged ecosystems. Another objective of the study was to observe the influence of plant diversity on aboveground biomass production in plant communities and also in the population of the dominant species, Cordia oncocalyx. Plant diversity was evaluated by assessing species richness, as well as using Shannon’s (H0) and Pielou’s (J0) indices. Aboveground plant biomass was evaluated in two AFS: agrosilvopastoral (ASP) and silvopastoral (SP), and also in a traditionally managed agricultural system (AG), areas that had been under fallow for six years (F6) and nine years (F9) and an area of unmanaged caatinga (CAT) vegetation. We observed that the ASP system had a lower diversity and number of species, especially tree species. However, it sustained the same total biomass production as CAT and fallow areas. The SP system, despite having lower H0 and J0 indices as well as lower total biomass production, had a similar number of species to CAT and cropped and fallow systems AG, F6 and F9. Plant biomass in F6 and F9 h... Mostrar Tudo |
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Palavras-Chave: |
Agroecologia. |
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Thesagro: |
Ecologia vegetal. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/158878/1/Does-biomass-1.pdf
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Marc: |
LEADER 02478naa a2200205 a 4500
001 1950111
005 2017-06-06
008 2013 bl uuuu u00u1 u #d
024 7 $a10.1007/s10457-012-9590-9$2DOI
100 1 $aAGUIAR, M. I. de
245 $aDoes biomass production depend on plant community diversity?$h[electronic resource]
260 $c2013
520 $aIn order to ensure the sustainability of agroecosystems, biodiversity must be a priority. Agroforestry, which includes trees, is an example of such diverse systems. We evaluated plant diversity and aboveground biomass production to assess whether areas under fallow following traditional cultivation return to their initial condition. Also, plant diversity and aboveground biomass production were assessed in agroforestry systems (AFS) to determine if these were similar to unmanaged ecosystems. Another objective of the study was to observe the influence of plant diversity on aboveground biomass production in plant communities and also in the population of the dominant species, Cordia oncocalyx. Plant diversity was evaluated by assessing species richness, as well as using Shannon’s (H0) and Pielou’s (J0) indices. Aboveground plant biomass was evaluated in two AFS: agrosilvopastoral (ASP) and silvopastoral (SP), and also in a traditionally managed agricultural system (AG), areas that had been under fallow for six years (F6) and nine years (F9) and an area of unmanaged caatinga (CAT) vegetation. We observed that the ASP system had a lower diversity and number of species, especially tree species. However, it sustained the same total biomass production as CAT and fallow areas. The SP system, despite having lower H0 and J0 indices as well as lower total biomass production, had a similar number of species to CAT and cropped and fallow systems AG, F6 and F9. Plant biomass in F6 and F9 had recovered to productivity levels of unmanaged CAT vegetation; however the diversity indices were not restored to the same level. Plant diversity did not have an effect on the productivity of the agroecosystems. Likewise, annual biomass production by C. oncocalyx is not dependent upon diversity, but it is influenced by the growth stage of individuals.
650 $aEcologia vegetal
653 $aAgroecologia
700 1 $aFIALHO, J. S.
700 1 $aARAÚJO, F. das C. S. de
700 1 $aCAMPANHA, M. M.
700 1 $aOLIVEIRA, T. S. de
773 $tAgroforestry Systems, Dordrecht$gv. 87, n. 3, p. 699-711, 2013.
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Embrapa Milho e Sorgo (CNPMS) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pantanal. Para informações adicionais entre em contato com cpap.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
11/01/1999 |
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Data da última atualização: |
30/03/2017 |
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Autoria: |
CAMPOS, Z.; COUTINHO, M.; GRIGG, G.; McCALLUM, H. |
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Afiliação: |
EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS). University of Queensland (Brisbane, Australia). |
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Título: |
Body temperature of free range caiman (Caiman crocodilus yacare) in the southern Pantanal, Brazil. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
In: CROCODILIAN BIOLOGY AND EVOLUTION CONFERENCE, 1998, Queensland. Programme and abstracts. Queensland: Univesity of Queensland, 1998. p.21. |
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Idioma: |
Inglês |
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Conteúdo: |
Body temperature was measured with a thermoprobe inserted 15 cm into the cloaca of 448 caimans of all sizes, at night, between August 1996 and October 1997. The resultsshow that caiman temperature follows mean water/air temperature, varying significantly with season. From July to September Tb varied from 24.6 +- 0.3 to 27.2 +- 0.4 C and from October to April it varied from 28.9 +- 0.4 to 31.1 +- 0.3 C. Basking behavour of a clutch of 28 hatchlings was observed between 0800-1700 hrs in August 1996. Individuals typically exposed themselves to the sun early and during the day but retreated to the water at night. This suggested a diurnal pattern of Tb, which has been the subject of a pilot study by radiotelemetry. A single adult female (73.5 cm SVL, 9.8 kg BW) was implanted with a temperature-sensitive trnasmitter (Sirtrack) and monitored during July-October 1997. Values of Tb varied between 19.8 and 34.3 C, with air ranging from 15.1-35.3 C and water from 19.7-30.8 C. Two distinct daily patterns were seen. On warm days, Tb increased in the morning, peaked at midday and declined during the afternoon. Lowest were recorded in the early hours of the norming. On cold days, Tb remained almost uniform throughout the day and night. We called this pattern "thermolazy"; on warm days it emerges to back. On cool days, it remains in the water. The study is continuing. |
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Palavras-Chave: |
Caiman crodilus yacare. |
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Thesagro: |
Jacaré. |
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Thesaurus NAL: |
Brazil; Pantanal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02029naa a2200205 a 4500
001 1793373
005 2017-03-30
008 1998 bl --- 0-- u #d
100 1 $aCAMPOS, Z.
245 $aBody temperature of free range caiman (Caiman crocodilus yacare) in the southern Pantanal, Brazil.
260 $c1998
520 $aBody temperature was measured with a thermoprobe inserted 15 cm into the cloaca of 448 caimans of all sizes, at night, between August 1996 and October 1997. The resultsshow that caiman temperature follows mean water/air temperature, varying significantly with season. From July to September Tb varied from 24.6 +- 0.3 to 27.2 +- 0.4 C and from October to April it varied from 28.9 +- 0.4 to 31.1 +- 0.3 C. Basking behavour of a clutch of 28 hatchlings was observed between 0800-1700 hrs in August 1996. Individuals typically exposed themselves to the sun early and during the day but retreated to the water at night. This suggested a diurnal pattern of Tb, which has been the subject of a pilot study by radiotelemetry. A single adult female (73.5 cm SVL, 9.8 kg BW) was implanted with a temperature-sensitive trnasmitter (Sirtrack) and monitored during July-October 1997. Values of Tb varied between 19.8 and 34.3 C, with air ranging from 15.1-35.3 C and water from 19.7-30.8 C. Two distinct daily patterns were seen. On warm days, Tb increased in the morning, peaked at midday and declined during the afternoon. Lowest were recorded in the early hours of the norming. On cold days, Tb remained almost uniform throughout the day and night. We called this pattern "thermolazy"; on warm days it emerges to back. On cool days, it remains in the water. The study is continuing.
650 $aBrazil
650 $aPantanal
650 $aJacaré
653 $aCaiman crodilus yacare
700 1 $aCOUTINHO, M.
700 1 $aGRIGG, G.
700 1 $aMcCALLUM, H.
773 $tIn: CROCODILIAN BIOLOGY AND EVOLUTION CONFERENCE, 1998, Queensland. Programme and abstracts. Queensland: Univesity of Queensland, 1998. p.21.
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