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Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging

Population structures of six tree species in three fragments of intact seasonal deciduous forest and three fragments disturbed by logging were studied in the northeastern Goiás. Forty random 400 m² plots were allocated in each fragment to survey plant population structures, number of stumps, cattle...

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Main Authors: Vieira, Daniel Luis Mascia, Scariot, Aldicir
Format: Artigo
Language: English
Published: Instituto de Tecnologia do Paraná - Tecpar 2017
Subjects:
Seasonal forest
canopy openness
plant cover
cattle grazing
lianas
Online Access: http://repositorio.unb.br/handle/10482/27366
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spelling ir-10482-273662019-03-28T14:09:30Z Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging Vieira, Daniel Luis Mascia Scariot, Aldicir Seasonal forest canopy openness plant cover cattle grazing lianas Population structures of six tree species in three fragments of intact seasonal deciduous forest and three fragments disturbed by logging were studied in the northeastern Goiás. Forty random 400 m² plots were allocated in each fragment to survey plant population structures, number of stumps, cattle feces, burnt logs, and canopy openness. Soil cover by life forms was estimated in 1m² sub-plots. Lianas were abundant in intermediately logged fragments and invasive herbs in the most disturbed fragment. Cattle avoided dense herbaceous strata, such as liana tangles. Cavanillesia arborea, Eugenia dysenterica and Swartzia multijuga trees occurred at very low densities in all the fragments and their seedlings were practically absent, which might endanger their future populations in these fragments. Myracrodruon urundeuva, Tabebuia impetiginosa and Astronium fraxinifolium, the most logged species, had high density of seedlings in all the fragments. However, the highest density of saplings and juvenile individuals occurred in the most disturbed fragment. As estruturas populacionais de seis espécies de árvores foram estudadas em três fragmentos de floresta estacional decidual intactos e três fragmentos impactados pela exploração seletiva de madeira no nordeste goiano. Quarenta parcelas de 400m² foram estabelecidas em cada fragmento para a amostragem de populações, número de tocos, fezes de gado, troncos queimados e abertura de dossel. A cobertura do solo por formas de vida foi estimada em sub-parcelas de 1m². Lianas foram mais abundantes em fragmentos com perturbação intermediária, enquanto herbáceas invasoras no fragmento mais perturbado. Cavanillesia arborea, Eugenia dysenterica e Swartzia multijuga ocorreram em densidades muito baixas em todos os fragmentos e plântulas foram praticamente ausentes, o que pode ameaçar o futuro de suas populações. Myracrodruon urundeuva, Tabebuia impetiginosa e Astronium fraxinifolium, as espécies mais exploradas da região, tiveram alta densidade de plântulas em todos os fragmentos. Entretanto, a maior densidade de plântulas estabelecidas (>1 ano) e juvenis ocorreu no fragmento mais perturbado. 2017-12-07T04:50:18Z 2017-12-07T04:50:18Z 2008 Artigo Braz. arch. biol. technol.,v.51,n.2,p.419-431,2008 1516-8913 http://repositorio.unb.br/handle/10482/27366 10.1590/S1516-89132008000200024 en Acesso Aberto application/pdf Instituto de Tecnologia do Paraná - Tecpar http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200024&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-89132008000200024&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1516-89132008000200024&lng=en&nrm=iso
institution REPOSITORIO UNB
collection REPOSITORIO UNB
language English
topic Seasonal forest
canopy openness
plant cover
cattle grazing
lianas
spellingShingle Seasonal forest
canopy openness
plant cover
cattle grazing
lianas
Vieira, Daniel Luis Mascia
Scariot, Aldicir
Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging
description Population structures of six tree species in three fragments of intact seasonal deciduous forest and three fragments disturbed by logging were studied in the northeastern Goiás. Forty random 400 m² plots were allocated in each fragment to survey plant population structures, number of stumps, cattle feces, burnt logs, and canopy openness. Soil cover by life forms was estimated in 1m² sub-plots. Lianas were abundant in intermediately logged fragments and invasive herbs in the most disturbed fragment. Cattle avoided dense herbaceous strata, such as liana tangles. Cavanillesia arborea, Eugenia dysenterica and Swartzia multijuga trees occurred at very low densities in all the fragments and their seedlings were practically absent, which might endanger their future populations in these fragments. Myracrodruon urundeuva, Tabebuia impetiginosa and Astronium fraxinifolium, the most logged species, had high density of seedlings in all the fragments. However, the highest density of saplings and juvenile individuals occurred in the most disturbed fragment.
format Artigo
author Vieira, Daniel Luis Mascia
Scariot, Aldicir
author_sort Vieira, Daniel Luis Mascia
title Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging
title_short Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging
title_full Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging
title_fullStr Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging
title_full_unstemmed Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging
title_sort environmental variables and tree population structures in deciduous forests of central brazil with different levels of logging
publisher Instituto de Tecnologia do Paraná - Tecpar
publishDate 2017
url http://repositorio.unb.br/handle/10482/27366
_version_ 1641988450113552384
score 13.657419

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