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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
30/10/2014 |
Data da última atualização: |
23/05/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
COSTA, T. C. e C. da; VIANA, J. H. M.; RIBEIRO, J. L. |
Afiliação: |
THOMAZ CORREA E CASTRO DA COSTA, CNPMS; JOAO HERBERT MOREIRA VIANA, CNPMS. |
Título: |
Semideciduous seasonal forest production of leaves and deciduousness in function of the water balance, LAI and NDVI. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
International Journal of Ecology, v. 2014, p. 1-15, 2014. |
DOI: |
http://dx.doi.org/10.1155/2014/923027 |
Idioma: |
Inglês |
Conteúdo: |
This study investigated the relationship between leaf production, litterfall, water balance, Leaf Area Index (LAI), and Normalized Difference Vegetation Index (NDVI) in semideciduous forests. The goal was to model this phenomenon to obtain the estimates of this component as an additional compartment of the ecosystem carbon sink. The tests were conducted in eight semideciduous forest fragments. Twenty-four permanent plots were monitored monthly and LAI measurements and weighing of litterfall deposited in nets were conducted for a period of thirteen months. In this period, Landsat 5 and IRS satellite images were obtained and processed for generation of NDVI. The water balance was calculated for each day. The relationship among the variables “leaf dry weight,” “LAI,” “NDVI,” and “water balance” was verified and a regression model was built and evaluated. The deciduous phenomenon can be explained by hydric balance, and LAI and NDVI are ancillary variables. The tendency of the variables in the period of 13 months was explained by quadratic functions. The varied behavior among the monitoring sites helped to know differences in the deposition of leaves. This study showed that only the leaf component of the litterfall of a semideciduous forest in tropical climate can capture 4to8Mg?ha?1? yr?1of CO2 and this amount can be estimated using climate, biophysics, and vegetation index variables. |
Thesagro: |
Balanço hídrico; Floresta. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02027naa a2200181 a 4500 001 1998849 005 2017-05-23 008 2014 bl uuuu u00u1 u #d 024 7 $ahttp://dx.doi.org/10.1155/2014/923027$2DOI 100 1 $aCOSTA, T. C. e C. da 245 $aSemideciduous seasonal forest production of leaves and deciduousness in function of the water balance, LAI and NDVI.$h[electronic resource] 260 $c2014 520 $aThis study investigated the relationship between leaf production, litterfall, water balance, Leaf Area Index (LAI), and Normalized Difference Vegetation Index (NDVI) in semideciduous forests. The goal was to model this phenomenon to obtain the estimates of this component as an additional compartment of the ecosystem carbon sink. The tests were conducted in eight semideciduous forest fragments. Twenty-four permanent plots were monitored monthly and LAI measurements and weighing of litterfall deposited in nets were conducted for a period of thirteen months. In this period, Landsat 5 and IRS satellite images were obtained and processed for generation of NDVI. The water balance was calculated for each day. The relationship among the variables “leaf dry weight,” “LAI,” “NDVI,” and “water balance” was verified and a regression model was built and evaluated. The deciduous phenomenon can be explained by hydric balance, and LAI and NDVI are ancillary variables. The tendency of the variables in the period of 13 months was explained by quadratic functions. The varied behavior among the monitoring sites helped to know differences in the deposition of leaves. This study showed that only the leaf component of the litterfall of a semideciduous forest in tropical climate can capture 4to8Mg?ha?1? yr?1of CO2 and this amount can be estimated using climate, biophysics, and vegetation index variables. 650 $aBalanço hídrico 650 $aFloresta 700 1 $aVIANA, J. H. M. 700 1 $aRIBEIRO, J. L. 773 $tInternational Journal of Ecology$gv. 2014, p. 1-15, 2014.
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
22/11/2012 |
Data da última atualização: |
07/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
AQUINO, M. F. S. de; DIAS, A. M.; BORGES, M.; MORAES, M. C. B.; LAUMANN, R. A. |
Afiliação: |
MICHELY FERREIRA SANTOS DE AQUINO, UnB; ALINE MOREIRA DIAS, UnB; MIGUEL BORGES, CENARGEN; MARIA CAROLINA BLASSIOLI MORAES, CENARGEN; RAUL ALBERTO LAUMANN, CENARGEN. |
Título: |
Influence of visual cues on host-searching and learning behaviour of the egg parasitoids Telenomus podisi and Trissolcus basalis. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Entomologia Experimentallis et Applicata, v. 145, p. 162-174, 2012. |
Idioma: |
Inglês Português |
Conteúdo: |
Insect parasitoids use a variety of chemical and physical cues when foraging for hosts and food. Parasitoids can learn cues that lead themto the hosts, thus contributing to better foraging.One of the cues that in?uence host-searching behaviour could be colour. In this study, we investigated the ability of females of the parasitoid wasps Telenomus podisi Ashmead and Trissolcus basalisWollaston (both Hymenoptera: Scelionidae) to respond to colours and to associate the presence of hosts ? eggs of Euschistus heros (Fabricius) (Hemiptera: Pentatomidae) ? with coloured substrates after training (associative learning). Two sets of experiments were conducted: in one the innate preference for substrate colours was examined, in the other associative learning of substrate colour and host presence was tested in multiple-choice and dual-choice experiments. In the associative learning experiments, Te. podisi and Tr. basalis were trained to respond to differently coloured substrates containing hosts in two sessions of 2 h each, with 1-h intervals. In multiple-choice experiments, the wasps displayed innate preference for yellow substrates over green, brown, black, or white ones. Even after being trained on substrates of different colours, both parasitoids continued to show preference for yellow substrates. The response to the colours of substrates of both parasitoids was related with the orientation to the plant foliage during the search for hosts. |
Palavras-Chave: |
Arasistink bugs; Arasitoid foraging; Associative learning; Percevejos; Substrate colour; Telenomus podisi. |
Thesagro: |
Euschistus Heros. |
Thesaurus NAL: |
Scelionidae; Trissolcus basalis. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/179308/1/Aquino-et-al-2012-Entomologia-Experimentalis-et-Applicata.pdf
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Marc: |
LEADER 02317naa a2200277 a 4500 001 1951200 005 2023-03-07 008 2012 bl uuuu u00u1 u #d 100 1 $aAQUINO, M. F. S. de 245 $aInfluence of visual cues on host-searching and learning behaviour of the egg parasitoids Telenomus podisi and Trissolcus basalis.$h[electronic resource] 260 $c2012 520 $aInsect parasitoids use a variety of chemical and physical cues when foraging for hosts and food. Parasitoids can learn cues that lead themto the hosts, thus contributing to better foraging.One of the cues that in?uence host-searching behaviour could be colour. In this study, we investigated the ability of females of the parasitoid wasps Telenomus podisi Ashmead and Trissolcus basalisWollaston (both Hymenoptera: Scelionidae) to respond to colours and to associate the presence of hosts ? eggs of Euschistus heros (Fabricius) (Hemiptera: Pentatomidae) ? with coloured substrates after training (associative learning). Two sets of experiments were conducted: in one the innate preference for substrate colours was examined, in the other associative learning of substrate colour and host presence was tested in multiple-choice and dual-choice experiments. In the associative learning experiments, Te. podisi and Tr. basalis were trained to respond to differently coloured substrates containing hosts in two sessions of 2 h each, with 1-h intervals. In multiple-choice experiments, the wasps displayed innate preference for yellow substrates over green, brown, black, or white ones. Even after being trained on substrates of different colours, both parasitoids continued to show preference for yellow substrates. The response to the colours of substrates of both parasitoids was related with the orientation to the plant foliage during the search for hosts. 650 $aScelionidae 650 $aTrissolcus basalis 650 $aEuschistus Heros 653 $aArasistink bugs 653 $aArasitoid foraging 653 $aAssociative learning 653 $aPercevejos 653 $aSubstrate colour 653 $aTelenomus podisi 700 1 $aDIAS, A. M. 700 1 $aBORGES, M. 700 1 $aMORAES, M. C. B. 700 1 $aLAUMANN, R. A. 773 $tEntomologia Experimentallis et Applicata$gv. 145, p. 162-174, 2012.
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