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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: |
22/08/2003 |
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Data da última atualização: |
06/12/2022 |
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Autoria: |
JENNINGS, S. B.; BROWN, N. D.; BOSHIER, D. H.; WHITMORE, T. C.; LOPES, J. do C. A. |
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Afiliação: |
JOSE DO CARMO ALVES LOPES, CPATU. |
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Título: |
Ecology provides a pragmatic solution to the maintenance of genetic diversity in sustainably managed tropical rain forests. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Forest Ecology and Management, v.154, p. 1-10, 2001. |
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DOI: |
http://dx.doi.org/10.1016/S0378-1127(00)00637-X |
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Idioma: |
Inglês |
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Conteúdo: |
An important aspect of the sustainable management of tropical rain forests is the maintenance of genetic diversity within populations of commercial tree species. Logging may reduce genetic variation directly and may also affect genetic processes, leading possibly to genetic erosion and ultimately even species extinction. It is, however, impractical for the forest manager to make meaningful measurements of genetic variation and they are therefore inappropriate for use as indicators of sustainable forest management. We propose that the application of well-known silvicultural principles is the most practical way of preventing rapid loss of genetic diversity. Most tropical rain forest tree species have many more individuals below the minimum size for commercial exploitation than above. The genetic diversity of these species will be little affected by logging, as the stems removed form only a small fraction of the total population. Similarly, for most species, disruption of normal mating patterns will either not occur or be transient, because reproduction commences at sizes well below felling limits, or because, after logging, juveniles will be recruited to the sexually mature size classes. Strongly light-demanding species with a commercial value are most likely to suffer loss of genetic diversity from logging. Characteristically, these have populations in which only a small proportion of the total population lies in small size classes. In order to conserve genetic diversity, pre-felling silvicultural treatments will be required to increase the survival and growth of juveniles. Ecological and genetic research needs to focus on these light-demanding species. MenosAn important aspect of the sustainable management of tropical rain forests is the maintenance of genetic diversity within populations of commercial tree species. Logging may reduce genetic variation directly and may also affect genetic processes, leading possibly to genetic erosion and ultimately even species extinction. It is, however, impractical for the forest manager to make meaningful measurements of genetic variation and they are therefore inappropriate for use as indicators of sustainable forest management. We propose that the application of well-known silvicultural principles is the most practical way of preventing rapid loss of genetic diversity. Most tropical rain forest tree species have many more individuals below the minimum size for commercial exploitation than above. The genetic diversity of these species will be little affected by logging, as the stems removed form only a small fraction of the total population. Similarly, for most species, disruption of normal mating patterns will either not occur or be transient, because reproduction commences at sizes well below felling limits, or because, after logging, juveniles will be recruited to the sexually mature size classes. Strongly light-demanding species with a commercial value are most likely to suffer loss of genetic diversity from logging. Characteristically, these have populations in which only a small proportion of the total population lies in small size classes. In order to conserve genetic diversity, pre... Mostrar Tudo |
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Palavras-Chave: |
Diversidade genética; Erosão genética; Extração seletiva de madeira; Manejo sustentável. |
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Thesagro: |
Floresta Tropical Úmida. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02496naa a2200241 a 4500
001 1403799
005 2022-12-06
008 2001 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/S0378-1127(00)00637-X$2DOI
100 1 $aJENNINGS, S. B.
245 $aEcology provides a pragmatic solution to the maintenance of genetic diversity in sustainably managed tropical rain forests.$h[electronic resource]
260 $c2001
520 $aAn important aspect of the sustainable management of tropical rain forests is the maintenance of genetic diversity within populations of commercial tree species. Logging may reduce genetic variation directly and may also affect genetic processes, leading possibly to genetic erosion and ultimately even species extinction. It is, however, impractical for the forest manager to make meaningful measurements of genetic variation and they are therefore inappropriate for use as indicators of sustainable forest management. We propose that the application of well-known silvicultural principles is the most practical way of preventing rapid loss of genetic diversity. Most tropical rain forest tree species have many more individuals below the minimum size for commercial exploitation than above. The genetic diversity of these species will be little affected by logging, as the stems removed form only a small fraction of the total population. Similarly, for most species, disruption of normal mating patterns will either not occur or be transient, because reproduction commences at sizes well below felling limits, or because, after logging, juveniles will be recruited to the sexually mature size classes. Strongly light-demanding species with a commercial value are most likely to suffer loss of genetic diversity from logging. Characteristically, these have populations in which only a small proportion of the total population lies in small size classes. In order to conserve genetic diversity, pre-felling silvicultural treatments will be required to increase the survival and growth of juveniles. Ecological and genetic research needs to focus on these light-demanding species.
650 $aFloresta Tropical Úmida
653 $aDiversidade genética
653 $aErosão genética
653 $aExtração seletiva de madeira
653 $aManejo sustentável
700 1 $aBROWN, N. D.
700 1 $aBOSHIER, D. H.
700 1 $aWHITMORE, T. C.
700 1 $aLOPES, J. do C. A.
773 $tForest Ecology and Management$gv.154, p. 1-10, 2001.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
17/03/2023 |
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Data da última atualização: |
23/10/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
RODRIGUES, G. G.; ZANATTA, J. A.; RACHWAL, M. F. G.; HIGA, R. C. V.; LAVORANTI, O. J.; SILVA, L. D. |
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Afiliação: |
GLEICE GOMES RODRIGUES, ESALQ; JOSILEIA ACORDI ZANATTA, CNPF; MARCOS FERNANDO GLUCK RACHWAL, CNPF; ROSANA CLARA VICTORIA HIGA, CNPF; OSMIR JOSE LAVORANTI, CNPF; LUCIANA DUQUE SILVA, ESALQ. |
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Título: |
Methane and nitrous oxide fluxes from clonal eucalyptus forests in different spacing arrangements. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Forestry: An International Journal of Forest Research, cpad001, 2023. |
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DOI: |
https://doi.org/10.1093/forestry/cpad001 |
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Idioma: |
Inglês |
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Conteúdo: |
Although Eucalyptus is the most commonly cultivated genus in Brazil, more information is needed on how these forests can act as a sink for greenhouse gases. This study assessed the potential greenhouse gas (GHG) mitigation of eucalyptus forests by quantifying both the seasonal rates of exchange of methane (CH4) and nitrous oxide (N2O) gases at the soil?atmosphere interface and their relationships with soil variables (moisture, temperature and physicochemical attributes). Soil organic carbon sequestration rate was used together with soil GHG emission to estimate net global warming potential. This study was conducted at an experimental forestry station in the south-central region of the state of São Paulo, Brazil. No differences were found between treatments in the seasonal fluxes of N2O and CH4, which may have resulted from similar soil properties, particularly bulk density and nitrate (NO3?) contents. CH4 flux dynamics were mainly controlled by the concentrations of ammonium (NH4+) in the soil. In all treatments, the soil acted as a continuous sink for CH4, absorbing it at an average rate of ?65 ?g C m?2 h?1, which was higher than the results of other studies conducted in native areas of the Cerrado biome and planted forests. However, although CH4 removal helped offset greenhouse gas emissions, net emissions were seen in most treatments due to N2O emissions in greater magnitude and soil carbon losses. |
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Palavras-Chave: |
Greenhouse gas; Mitigação; Mitigation. |
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Thesagro: |
Carbono; Floresta. |
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Thesaurus NAL: |
Carbon; Eucalyptus; Forests. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02271naa a2200289 a 4500
001 2152479
005 2023-10-23
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1093/forestry/cpad001$2DOI
100 1 $aRODRIGUES, G. G.
245 $aMethane and nitrous oxide fluxes from clonal eucalyptus forests in different spacing arrangements.$h[electronic resource]
260 $c2023
520 $aAlthough Eucalyptus is the most commonly cultivated genus in Brazil, more information is needed on how these forests can act as a sink for greenhouse gases. This study assessed the potential greenhouse gas (GHG) mitigation of eucalyptus forests by quantifying both the seasonal rates of exchange of methane (CH4) and nitrous oxide (N2O) gases at the soil?atmosphere interface and their relationships with soil variables (moisture, temperature and physicochemical attributes). Soil organic carbon sequestration rate was used together with soil GHG emission to estimate net global warming potential. This study was conducted at an experimental forestry station in the south-central region of the state of São Paulo, Brazil. No differences were found between treatments in the seasonal fluxes of N2O and CH4, which may have resulted from similar soil properties, particularly bulk density and nitrate (NO3?) contents. CH4 flux dynamics were mainly controlled by the concentrations of ammonium (NH4+) in the soil. In all treatments, the soil acted as a continuous sink for CH4, absorbing it at an average rate of ?65 ?g C m?2 h?1, which was higher than the results of other studies conducted in native areas of the Cerrado biome and planted forests. However, although CH4 removal helped offset greenhouse gas emissions, net emissions were seen in most treatments due to N2O emissions in greater magnitude and soil carbon losses.
650 $aCarbon
650 $aEucalyptus
650 $aForests
650 $aCarbono
650 $aFloresta
653 $aGreenhouse gas
653 $aMitigação
653 $aMitigation
700 1 $aZANATTA, J. A.
700 1 $aRACHWAL, M. F. G.
700 1 $aHIGA, R. C. V.
700 1 $aLAVORANTI, O. J.
700 1 $aSILVA, L. D.
773 $tForestry: An International Journal of Forest Research, cpad001, 2023.
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