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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
18/12/2002 |
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Data da última atualização: |
11/02/2009 |
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Autoria: |
SIMPSON, B. B. |
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Título: |
A revision of the genus Polylepis (Rosaceae: Sanguisorbeae). |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Washington: Smithsonian Institution, 1979. |
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Páginas: |
62p. |
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Descrição Física: |
il. |
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Idioma: |
Inglês |
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Conteúdo: |
Species of Polylepis are shrubs or trees native to the mid- and high-elevation tropical Andes. Some species of Polylepis form woodlands growing well above normal treeline within grass and scrub associations at elevations over 5000 m. Consequently, Polylepis appears to be the highest natural occurring arborescent angiosperm genus in the world. The physiological basis allowing such high altitude growth is not understood, but evidence indicates that woodlands at these elevations are restricted to microsites where ecological conditions are similar to those of lower altitudes. The genus is distinct from other rosaceous members of the tribe Sanguisorbeae and is interpreted here as consisting of three species groups that appear to have spread independently north and south along the Andean chain. Because of the pacthy distributions of populations and disturbences by man, species are often polytopic. Asa a result, numerous forms have been described as distinct taxa in the past. In addition, hybridization appears to occur between species making circumscription of some taxa difficult. In this revision, evidence from studies of gross morphology, leaflet anatomy, pollen morphology, and field observations of the autecology of various populations were used to ascertain the number of species within te genus and their relationships to one another. Data from these sources indicate that Polylepis should be considered as consisting of 15 species, one of which is first described in this treatment. A key for the identification of the species is provided. Each species is illustrated, discussed, and its modern distribution mapped. MenosSpecies of Polylepis are shrubs or trees native to the mid- and high-elevation tropical Andes. Some species of Polylepis form woodlands growing well above normal treeline within grass and scrub associations at elevations over 5000 m. Consequently, Polylepis appears to be the highest natural occurring arborescent angiosperm genus in the world. The physiological basis allowing such high altitude growth is not understood, but evidence indicates that woodlands at these elevations are restricted to microsites where ecological conditions are similar to those of lower altitudes. The genus is distinct from other rosaceous members of the tribe Sanguisorbeae and is interpreted here as consisting of three species groups that appear to have spread independently north and south along the Andean chain. Because of the pacthy distributions of populations and disturbences by man, species are often polytopic. Asa a result, numerous forms have been described as distinct taxa in the past. In addition, hybridization appears to occur between species making circumscription of some taxa difficult. In this revision, evidence from studies of gross morphology, leaflet anatomy, pollen morphology, and field observations of the autecology of various populations were used to ascertain the number of species within te genus and their relationships to one another. Data from these sources indicate that Polylepis should be considered as consisting of 15 species, one of which is first described in this treatmen... Mostrar Tudo |
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Palavras-Chave: |
Polylepis. |
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Thesagro: |
Botânica; Morfologia Vegetal; Taxonomia Vegetal. |
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Thesaurus Nal: |
botany; plant anatomy; taxonomy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02164nam a2200205 a 4500
001 1392810
005 2009-02-11
008 1979 bl uuuu 00u1 u #d
100 1 $aSIMPSON, B. B.
245 $aA revision of the genus Polylepis (Rosaceae$bSanguisorbeae).
260 $aWashington: Smithsonian Institution$c1979
300 $a62p.$cil.
520 $aSpecies of Polylepis are shrubs or trees native to the mid- and high-elevation tropical Andes. Some species of Polylepis form woodlands growing well above normal treeline within grass and scrub associations at elevations over 5000 m. Consequently, Polylepis appears to be the highest natural occurring arborescent angiosperm genus in the world. The physiological basis allowing such high altitude growth is not understood, but evidence indicates that woodlands at these elevations are restricted to microsites where ecological conditions are similar to those of lower altitudes. The genus is distinct from other rosaceous members of the tribe Sanguisorbeae and is interpreted here as consisting of three species groups that appear to have spread independently north and south along the Andean chain. Because of the pacthy distributions of populations and disturbences by man, species are often polytopic. Asa a result, numerous forms have been described as distinct taxa in the past. In addition, hybridization appears to occur between species making circumscription of some taxa difficult. In this revision, evidence from studies of gross morphology, leaflet anatomy, pollen morphology, and field observations of the autecology of various populations were used to ascertain the number of species within te genus and their relationships to one another. Data from these sources indicate that Polylepis should be considered as consisting of 15 species, one of which is first described in this treatment. A key for the identification of the species is provided. Each species is illustrated, discussed, and its modern distribution mapped.
650 $abotany
650 $aplant anatomy
650 $ataxonomy
650 $aBotânica
650 $aMorfologia Vegetal
650 $aTaxonomia Vegetal
653 $aPolylepis
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
20/06/2008 |
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Data da última atualização: |
02/04/2013 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
CAMPOS, Z.; COUTINHO, M. E. |
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Afiliação: |
ZILCA MARIA DA SILVA CAMPOS, CPAP; MARCOS EDUARDO COUTINHO, CPAP. |
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Título: |
Uso do ultraleve nos estudos do jacaré-do-pantanal. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Corumbá: Embrapa Pantanal, 2004. |
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Páginas: |
4 p. |
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Série: |
(Embrapa Pantanal. Artigo de Divulgação na Mídia, 50). |
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Idioma: |
Português |
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Notas: |
Formato eletrônico. |
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Palavras-Chave: |
Estimativas populacionais; Monitoramento. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAP/56368/1/ADM050.pdf
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Marc: |
LEADER 00526nam a2200169 a 4500
001 1812666
005 2013-04-02
008 2004 bl uuuu u00u1 u #d
100 1 $aCAMPOS, Z.
245 $aUso do ultraleve nos estudos do jacaré-do-pantanal.$h[electronic resource]
260 $aCorumbá: Embrapa Pantanal$c2004
300 $a4 p.
490 $a(Embrapa Pantanal. Artigo de Divulgação na Mídia, 50).
500 $aFormato eletrônico.
653 $aEstimativas populacionais
653 $aMonitoramento
700 1 $aCOUTINHO, M. E.
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Embrapa Pantanal (CPAP) |
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