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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
14/07/1997 |
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Data da última atualização: |
31/03/2017 |
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Autoria: |
PARIKESIT, P.; LARSON, D. W.; MATTHES-SEARS, U. |
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Título: |
Impacts of trails on cliff-edge forest structure. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Canadian Journal of Botany, v.73, n.6, p.943-953, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
Plant community structure and soil characteristics were quantitatively studied along forested cliff edges of the Niagara Escarpment in southern Ontario, Canada. The objetive of the study was to try to differentiate between the effects of two gradients on vegetation structure: the environmental gradient between the cliff edge and dense forest, and and anthroponic gradient, generated by the presence of major hiking trails parallel to the cliff edges. Species frequencies were determined along 69 transects distributed over eight sites with different amounts of past and present trampling disturbance. The data were analyzed using cluster and ordination analysis as well as analyses of variance. The results showed that soil characteristics were the major influence organizing the vegetation of clif-edge forests and that soil properties and plant community structure were more strongly influenced by anthropogenic factors than by the environmental gradient between cliff edge and forest. Trampled plots had some properties in common with cliff-edge plots. Species richness was highest at intemediate trai-use levels; abandonment of heavily disturbed trails resulted in the restoration of species richness, but most new colonizing plants were disturbance-tolerant ruderals. Soil properties did not completely recover even after 10 years of trail abandonment. The results suggest that the current use of cliff edges along the Niagara Escarpment is nonsustainable,a and reversing its effects on cliff-edge forest structure may take a considerable amount of time. MenosPlant community structure and soil characteristics were quantitatively studied along forested cliff edges of the Niagara Escarpment in southern Ontario, Canada. The objetive of the study was to try to differentiate between the effects of two gradients on vegetation structure: the environmental gradient between the cliff edge and dense forest, and and anthroponic gradient, generated by the presence of major hiking trails parallel to the cliff edges. Species frequencies were determined along 69 transects distributed over eight sites with different amounts of past and present trampling disturbance. The data were analyzed using cluster and ordination analysis as well as analyses of variance. The results showed that soil characteristics were the major influence organizing the vegetation of clif-edge forests and that soil properties and plant community structure were more strongly influenced by anthropogenic factors than by the environmental gradient between cliff edge and forest. Trampled plots had some properties in common with cliff-edge plots. Species richness was highest at intemediate trai-use levels; abandonment of heavily disturbed trails resulted in the restoration of species richness, but most new colonizing plants were disturbance-tolerant ruderals. Soil properties did not completely recover even after 10 years of trail abandonment. The results suggest that the current use of cliff edges along the Niagara Escarpment is nonsustainable,a and reversing its effects on cliff... Mostrar Tudo |
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Palavras-Chave: |
Analise de grupo; Disturbance; Estrutura da comunidade; Niagara Escarpment; Ordenacao; Ordination; Perturbacao; Plant community ecology; Trampling. |
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Thesagro: |
Ecologia Vegetal. |
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Thesaurus Nal: |
Canada; cluster analysis. |
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Categoria do assunto: |
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Marc: |
LEADER 02325naa a2200289 a 4500
001 1791308
005 2017-03-31
008 1995 bl --- 0-- u #d
100 1 $aPARIKESIT, P.
245 $aImpacts of trails on cliff-edge forest structure.
260 $c1995
520 $aPlant community structure and soil characteristics were quantitatively studied along forested cliff edges of the Niagara Escarpment in southern Ontario, Canada. The objetive of the study was to try to differentiate between the effects of two gradients on vegetation structure: the environmental gradient between the cliff edge and dense forest, and and anthroponic gradient, generated by the presence of major hiking trails parallel to the cliff edges. Species frequencies were determined along 69 transects distributed over eight sites with different amounts of past and present trampling disturbance. The data were analyzed using cluster and ordination analysis as well as analyses of variance. The results showed that soil characteristics were the major influence organizing the vegetation of clif-edge forests and that soil properties and plant community structure were more strongly influenced by anthropogenic factors than by the environmental gradient between cliff edge and forest. Trampled plots had some properties in common with cliff-edge plots. Species richness was highest at intemediate trai-use levels; abandonment of heavily disturbed trails resulted in the restoration of species richness, but most new colonizing plants were disturbance-tolerant ruderals. Soil properties did not completely recover even after 10 years of trail abandonment. The results suggest that the current use of cliff edges along the Niagara Escarpment is nonsustainable,a and reversing its effects on cliff-edge forest structure may take a considerable amount of time.
650 $aCanada
650 $acluster analysis
650 $aEcologia Vegetal
653 $aAnalise de grupo
653 $aDisturbance
653 $aEstrutura da comunidade
653 $aNiagara Escarpment
653 $aOrdenacao
653 $aOrdination
653 $aPerturbacao
653 $aPlant community ecology
653 $aTrampling
700 1 $aLARSON, D. W.
700 1 $aMATTHES-SEARS, U.
773 $tCanadian Journal of Botany$gv.73, n.6, p.943-953, 1995.
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Registro original: |
Embrapa Pantanal (CPAP) |
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