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Horizontal structure of arboreal community under an Araucaria angustifolia stand and a Mixed Ombrophyllous Forest Estrutura horizontal da comunidade arbórea sob um povoamento com Araucaria angustifolia e uma Floresta Ombrófila Mista
oleh: Rafael Rode, Afonso Figueiredo Filho, Franklin Galvão, Sebastião do Amaral Machado
Format: | Article |
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Diterbitkan: | Embrapa Florestas 2010-12-01 |
Deskripsi
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Locked="false" Priority="19" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Emphasis" /> <w:LsdException Locked="false" Priority="21" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Emphasis" /> <w:LsdException Locked="false" Priority="31" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Reference" /> <w:LsdException Locked="false" Priority="32" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Reference" /> <w:LsdException Locked="false" Priority="33" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Book Title" /> <w:LsdException Locked="false" Priority="37" Name="Bibliography" /> <w:LsdException Locked="false" Priority="39" QFormat="true" Name="TOC Heading" /> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:5.0pt; mso-para-margin-right:0cm; mso-para-margin-bottom:5.0pt; mso-para-margin-left:0cm; text-align:justify; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]--> <p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; text-align: left;" align="left"><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">The horizontal structure of the arboreal community under an </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Araucaria angustifolia </span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">stand with 60 years and a Mixed Ombrophyllous Forest in National Forest of Irati, Parana State - Brazil, were compared. In both areas were established permanent plots of 1 ha (100 m x 100 m): 10 plots (10 ha) in the </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">A. angustifolia </span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">stand and 25 plots (25 ha) in the natural forest. All of the individuals with dbh above 10 centimeters were identified, numbered and positioned spatiality. The phytosociological parameters and diametric distribution of the two communities were determined and related. In the stand, the species with highest importance and coverage values, when not considering the </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Araucaria angustifolia </span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">trees remnants in plantation were </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Myrsine umbellata</span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">, </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Psychotria Vellosiana</span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">, </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Cabralea canjerana</span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">, </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Casearia sylvestris</span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">, </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Alchornea triplinervia </span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">and </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Cedrela fissilis</span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">, while in the forest were </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Araucaria angustifolia</span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">, </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Ilex paraguariensis, Ocotea odorifera </span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">and </span><em><span style="font-size: 10pt; font-family: ";TimesNewRomanPS-ItalicMT";,";serif";;" lang="EN-US">Nectandra grandiflora</span></em><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">. The Kolmogorov-Smirnov test indicated that stand plots were different from the forest in terms of diametric distribuition, besides presenting the lowest variation. In general, the stand species are ahead in an initial successional stage and has limitations for their development. This fact is likely related with the high planting coverage (basal area = 30.2 m² ha</span><span style="font-size: 6pt; font-family: TimesNewRomanPSMT;" lang="EN-US">-1</span><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">).</span></p><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; text-align: left;" align="left"> </p><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; text-align: left;" align="left"><span style="font-size: 10pt; font-family: TimesNewRomanPSMT;" lang="EN-US">doi: 10.4336/2010.pfb.30.64.347<br /></span></p><br><p><span style="font-family: " lang="PT-BR">Foi avaliada e comparada a estrutura horizontal de uma comunidade arbórea sob um povoamento com Araucaria angustifolia de 60 anos e uma Floresta Ombrófila Mista na Floresta Nacional de Irati, no centro-sul do Paraná. Em ambas as áreas foram instaladas parcelas permanentes de 1 ha (100 m x 100 m), sendo 10 parcelas no povoamento (10 ha) e 25 na floresta (25 ha). Todos os indivíduos com DAP acima de 10 cm foram medidos e identificados. Foram calculados e relacionados os parâmetros fitossociológicos e a distribuição diamétrica das duas comunidades. No povoamento, as espécies com maiores valores de importância e cobertura, quando não considerandos os indivíduos de <em>Araucaria angustifolia </em>remanescentes do plantio, foram: <em>Myrsine umbellata</em>, <em>Psychotria vellosiana</em>, <em>Cabralea canjerana</em>, <em>Casearia</em> sylvestris, <em>Alchornea triplinervi</em>a e <em>Cedrela fissilis</em>. Na floresta, <em>Araucaria angustifolia</em>, <em>Ilex paraguariensis</em>,<em> Ocotea</em> odorifera, <em>Nectandra grandiflora</em> e <em>Ocotea porosa </em>foram as espécies mais importantes. Verificou-se que as parcelas do povoamento se diferenciam da floresta em termos de distribuição diamétrica, com a aplicação do teste de Kolmogorov-Smirnov, além de apresentarem menor variação diamétrica. Em geral, as espécies no povoamento se encontram em um estágio sucessional que sobrevêm o inicial e que apresentam limitações em seu desenvolvimento. É provável que esse fato esteja relacionado com a alta cobertura do plantio (área basal = 30,2 m² ha-1).<strong></strong></span></p><p><span style="font-family: " lang="PT-BR">doi: 10.4336/2010.pfb.30.64.347<strong><br /></strong></span></p>