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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
26/06/2024 |
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Data da última atualização: |
26/06/2024 |
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Autoria: |
BLACK, G. A.; DOBZHANSKY, TH.; PAVAN, C. |
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Afiliação: |
GEORGE ALEXANDER BLACK, INSTITUTO AGRONOMICO DO NORTE; TH. DOBZHANSKY, COLUMBIA UNIVERSITY; C. PAVAN, UNIVERSIDADE DE SÃO PAULO. |
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Título: |
Some attempts to estimate species diversity and population density of trees in Amazonian forests. |
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Ano de publicação: |
1950 |
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Fonte/Imprenta: |
Botanical Gazette, v. 111, n. 4, p. 413-425, 1950. |
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Idioma: |
Inglês |
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Conteúdo: |
Counts of trees with trunks more than 10 (or 20) cm. in diameter have been made on three 1-hectare (100 x 100 m.) plots in the vicinity of Belem, state of Pera, and at Tefe, state of Amazonas. The species were delimited with the assistance of native tree specialists, and whenever possible identified by vernacular as well as by scientific names. On the three plots 60, 87, and 79 species have been recorded among 564, 423, and 230 individuals, respectively. 2. Analysis of the data with the aid of PRESTON'S (6) "octave" method suggests that we have encountered probably no more than half the species which exist in the associations studied. Most of the rare, and some of the moderately common, species are missing on our plots. The population densities of many species of trees in the Amazonian Hylea are less than one individual per hectare. |
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Palavras-Chave: |
Amazonian forests; Floresta Amazônica; Specie. |
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Thesagro: |
Espécie; População. |
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Thesaurus Nal: |
population. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01468naa a2200217 a 4500
001 2165159
005 2024-06-26
008 1950 bl uuuu u00u1 u #d
100 1 $aBLACK, G. A.
245 $aSome attempts to estimate species diversity and population density of trees in Amazonian forests.$h[electronic resource]
260 $c1950
520 $aCounts of trees with trunks more than 10 (or 20) cm. in diameter have been made on three 1-hectare (100 x 100 m.) plots in the vicinity of Belem, state of Pera, and at Tefe, state of Amazonas. The species were delimited with the assistance of native tree specialists, and whenever possible identified by vernacular as well as by scientific names. On the three plots 60, 87, and 79 species have been recorded among 564, 423, and 230 individuals, respectively. 2. Analysis of the data with the aid of PRESTON'S (6) "octave" method suggests that we have encountered probably no more than half the species which exist in the associations studied. Most of the rare, and some of the moderately common, species are missing on our plots. The population densities of many species of trees in the Amazonian Hylea are less than one individual per hectare.
650 $apopulation
650 $aEspécie
650 $aPopulação
653 $aAmazonian forests
653 $aFloresta Amazônica
653 $aSpecie
700 1 $aDOBZHANSKY, TH.
700 1 $aPAVAN, C.
773 $tBotanical Gazette$gv. 111, n. 4, p. 413-425, 1950.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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