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Ciência Florestal
Centro de Pesquisas Florestais - CEPEF, Departamento de Ciências Florestais - DCFL, Programa de Pós Graduação em Engenharia Florestal - PPGEF
ISSN: 0103-9954
EISSN: 0103-9954
Vol. 25, No. 3, 2015, pp. 781-789 		Bioline Code: cf15073
Full paper language: Portuguese
Document type: Research Article
Document available free of charge

Ciência Florestal, Vol. 25, No. 3, 2015, pp. 781-789

 en CLUSTER ANALYSIS IN SEASONAL DECIDUOUS FOREST REMNANTS
de Almeida, Clarice Maboni; Araujo, Maristela Machado; Longhi, Solon Jonas; Rovedder, Ana Paula; Sccoti, Marta Silvana Volpato; d’Avila, Márcia; Aimi, Suelen Carpenedo & Tonetto, Thaíse da Silva

Abstract

This study intended to analyze the presence of clusters in the vegetation of Seasonal Deciduous Forest remnants, characterized as a concave enclave, on steep sandy soil, among the region’s characteristic fields. Shrub and tree specimens with CBH (circumference at breast height) ≥ 15 cm were sampled in two size classes. In class I (CBH ≥ 30 cm) specimen sampling, we used fourteen 20 x 100 m plots, divided into sub-plots (10 x 10 m). Class II (15 ≤ CBH < 30 cm) specimens were observed in 70 sub-portions. We used the TWINSPAN program to analyze the clusters, which indicated two well-defined clusters in class I (G1 and G2) and one relatively homogenous cluster in class II (understorey). There were Trichilia claussenii check for this species in other resources , Cupania vernalis check for this species in other resources and Crysophyllum marginatum check for this species in other resources indicator species in the G1 cluster; and Luehea divaricata check for this species in other resources and Sebastiania commersoniana check for this species in other resources in the G2 cluster. Regarding to horizontal structure, these species were among the three most important ones in both clusters. In the understorey, the most important species were Actinostemon concolor check for this species in other resources , Trichilia claussenii, Trichilia elegans check for this species in other resources , Eugenia rostrifolia check for this species in other resources and Sorocea bonplandii check for this species in other resources . Since these species prevail in the tree vegetation, they are fundamental to stabilize hillsides, considering that they are adapted to steep and shallow soil areas, pointing out the Cupania vernalis and Trichilia claussenii in less modified environments and the Luehea divaricata and Sebastiania commersoniana in environments more susceptible to interference.

Keywords
phytosociology; indicator species; ecological groups

 
 pt ANÁLISE DE AGRUPAMENTOS EM REMANESCENTE DE FLORESTA ESTACIONAL DECIDUAL
de Almeida, Clarice Maboni; Araujo, Maristela Machado; Longhi, Solon Jonas; Rovedder, Ana Paula; Sccoti, Marta Silvana Volpato; d’Avila, Márcia; Aimi, Suelen Carpenedo & Tonetto, Thaíse da Silva

Resumo

Floresta Estacional Decidual, caracterizado como um enclave côncavo, em terreno com declividade acentuada e solo arenoso, entre campos característicos da região. As espécies arbóreas e arbustivas com CAP (circunferência a altura de 1,3 m do solo) ≥ 15 cm foram amostradas em duas classes de tamanho. Na amostragem dos indivíduos da Classe I (CAP ≥ 30 cm) foram utilizadas 14 parcelas de 20 x 100 m, divididas em subparcelas (10 x 10 m). Os indivíduos da Classe II (15 ≤ CAP < 30 cm) foram observados em 70 subparcelas. Para análise de agrupamentos foi utilizado o programa TWINSPAN, que indicou dois grupos (G1 e G2) bem definidos na Classe I e um grupo relativamente homogêneo na Classe II (sub-bosque). No grupo G1 ocorreram as espécies indicadoras Trichilia claussenii check for this species in other resources , Cupania vernalis check for this species in other resources e Crysophyllum marginatum check for this species in other resources ; e no grupo G2 Luehea divaricata check for this species in other resources e Sebastiania commersoniana check for this species in other resources . Em relação à estrutura horizontal, essas espécies estiveram entre as três mais importantes nos respectivos grupos. No sub-bosque, as espécies com maior valor de importância foram Actinostemon concolor check for this species in other resources , Trichilia claussenii, Trichilia elegans check for this species in other resources , Eugenia rostrifolia check for this species in other resources e Sorocea bonplandii check for this species in other resources . Essas espécies, por predominarem na vegetação arbórea, apresentam papel fundamental na estabilização de encostas, considerando que estão adaptadas às áreas com declividade acentuada e solos rasos, destacando-se Cupania vernalis e Trichilia claussenii em ambientes menos alterados e Luehea divaricata e Sebastiania commersoniana em ambientes mais susceptíveis às interferências.

Palavras-chave
fitossociologia; espécies indicadoras; grupo ecológico

 
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