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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
08/02/2013 |
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Data da última atualização: |
19/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VIEIRA, F. de A.; FAJARDO, C. G.; SOUZA, A. M. de; REIS, C. A. F.; CARVALHO, D. de. |
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Afiliação: |
Fábio de Almeida Vieira, UFRN; Cristiane Gouvêa Fajardo, UFRN; Anderson Marcos de Souza, UnB; CRISTIANE APARECIDA FIORAVANTE REIS, CNPF; Dulcinéia de Carvalho, UFLA. |
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Título: |
Fine-scale genetic dynamics of a dominant neotropical tree in the threatened Brazilian Atlantic Rainforest. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Tree Genetics & Genomes, v. 8, p. 1191-1201, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
We present a case study of the relationship between spatial genetic structure (SGS) and age structure in Protium spruceanum (Burseraceae), an insect-pollinated, mass-fruiting, and secondary bird-dispersed tree, as determined through variation in allozyme loci. Using ten polymorphic loci, we investigated spatial and temporal patterns of a genetic structure within a 40 m×60 m plot in a small (1.0 ha) fragment of Atlantic Rainforest to investigate the processes shaping the distribution of genetic diversity. Individuals (n0345) from seedlings to adults were grouped and analyzed in four diameter classes. The results showed a high average level of genetic diversity (He00.438), but genetic diversity parameters did not vary significantly among cohorts. The spatial distribution pattern analysis of individuals showed significant levels of aggregation among small- and medium-diameter classes and random distribution among the highest diameter class, likely due to processes of competitive thinning. There was an association between demographic and SGS at short distances (less than 10 m) which is likely the consequence of restricted seed dispersal. The degree of SGS decreased across small- to large-diameter classes.We inferred that limited seed dispersal and subsequent density-dependent mortality from the family clusters are responsible for the observed changes in fine-scale SGS across different demographic classes. |
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Palavras-Chave: |
Banco de semente; Diversidade genética; Protium spruceanum. |
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Thesagro: |
Burseraceae; Inseto Polinizador. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02104naa a2200229 a 4500
001 1948921
005 2015-02-19
008 2012 bl uuuu u00u1 u #d
100 1 $aVIEIRA, F. de A.
245 $aFine-scale genetic dynamics of a dominant neotropical tree in the threatened Brazilian Atlantic Rainforest.
260 $c2012
520 $aWe present a case study of the relationship between spatial genetic structure (SGS) and age structure in Protium spruceanum (Burseraceae), an insect-pollinated, mass-fruiting, and secondary bird-dispersed tree, as determined through variation in allozyme loci. Using ten polymorphic loci, we investigated spatial and temporal patterns of a genetic structure within a 40 m×60 m plot in a small (1.0 ha) fragment of Atlantic Rainforest to investigate the processes shaping the distribution of genetic diversity. Individuals (n0345) from seedlings to adults were grouped and analyzed in four diameter classes. The results showed a high average level of genetic diversity (He00.438), but genetic diversity parameters did not vary significantly among cohorts. The spatial distribution pattern analysis of individuals showed significant levels of aggregation among small- and medium-diameter classes and random distribution among the highest diameter class, likely due to processes of competitive thinning. There was an association between demographic and SGS at short distances (less than 10 m) which is likely the consequence of restricted seed dispersal. The degree of SGS decreased across small- to large-diameter classes.We inferred that limited seed dispersal and subsequent density-dependent mortality from the family clusters are responsible for the observed changes in fine-scale SGS across different demographic classes.
650 $aBurseraceae
650 $aInseto Polinizador
653 $aBanco de semente
653 $aDiversidade genética
653 $aProtium spruceanum
700 1 $aFAJARDO, C. G.
700 1 $aSOUZA, A. M. de
700 1 $aREIS, C. A. F.
700 1 $aCARVALHO, D. de
773 $tTree Genetics & Genomes$gv. 8, p. 1191-1201, 2012.
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| 15. |  | CAMARÃO, A. P.; TEIXEIRA NETO, J. F.; AZEVEDO, G. P. C. de; NERY, A. Introdução e avaliação de forrageiras em pastagens nativas da Ilha de Marajó. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 36., 1999, Porto Alegre. Anais do simpósios e workshops... Porto Alegre: SBZ, 1999. Resumo publicado também em: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 36., 1999, Porto Alegre. Resumos dos trabalhos apresentados... Porto Alegre: Sociedade Brasileira de Zootecnia, 1999. p. 71.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 18. | | TEIXEIRA NETO, J. F.; VEIGA, J. B. da; NERY, A. P. Produtividade estacional da pastagem nativa e Brachiaria humidicola, na ilha de Marajó. In: SIMPÓSIO DO TRÓPICO ÚMIDO, 1., 1984, Belém, PA. Resumos. Belém, PA: EMBRAPA-CPATU, 1984. p. 340. (EMBRAPA-CPATU. Documentos, 31).| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 29 | |
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