Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial
Edge influence, the set of modifications in the natural environment next to abrupt anthropogenic or natural edges, is a serious threat to biodiversity in fragmented environments. Common examples of edge influence include an increased abundance of exotic species and modifications in vegetation struct...
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ftunivfsaocarlos:oai:repositorio.ufscar.br:ufscar/1858 2024-09-09T20:12:20+00:00 Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial Dodonov, Pavel Matos, Dalva Maria da Silva http://lattes.cnpq.br/4728734263109138 http://lattes.cnpq.br/9008153877455949 2015-02-20 application/pdf https://repositorio.ufscar.br/handle/ufscar/1858 por por Universidade Federal de São Carlos BR UFSCar Programa de Pós-Graduação em Ecologia e Recursos Naturais - PPGERN DODONOV, Pavel. Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial. 2015. 246 f. Tese (Doutorado em Ciências Biológicas) - Universidade Federal de São Carlos, São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/1858 Acesso Aberto Conservação Cerrados Influência de borda Cadeias de Markov Transformada de Wavelet Diversidade estrutural Efeitos de borda Gramíneas invasoras Modelos autoregressivos Padrão espacial Tundra CIENCIAS BIOLOGICAS::ECOLOGIA Tese 2015 ftunivfsaocarlos 2024-06-21T05:13:03Z Edge influence, the set of modifications in the natural environment next to abrupt anthropogenic or natural edges, is a serious threat to biodiversity in fragmented environments. Common examples of edge influence include an increased abundance of exotic species and modifications in vegetation structure and/or composition. Edges of linear disturbances, such as roads, powerlines, and firebreaks, are especially important due to their ubiquity in the landscape. Although such disturbances are much narrower than other anthropogenic land uses, they have been shown to affect adjacent plant and animal communities. The combination of edge influence with the natural variation in vegetation may lead to complex and not easily discernible patterns. However, this natural variation is not usually taken into account in studies of edge influence. We employed a spatial pattern approach to study edge influence from narrow linear disturbances while accounting for variation in vegetation (both natural and from disturbance history), in Brazilian cerrado and in Canadian forest-tundra ecotone. Our main objectives were 1) to assess the overall heterogeneity in the cover of native and invasive graminoids, structural diversity and species composition, and 2) to verify whether the spatial pattern of different response variables is affected by anthropogenic edges. Secondary objectives include: 3) to explore different ways in which wavelet transforms and Monte Carlo simulations may be used to assess edge influence, 4) to compare different structural diversity indices, and 5) to assess whether the spatial patterns of different plant species are related to their functional traits. We sampled five 300-1350 m-long transects, three in Brazil and two in Canada. The transects contained one to five anthropogenic edges and one to ten natural edges and were divided into contiguous 1x1 m quadrats. In each quadrat, we estimated the cover of native and invasive graminoids (two transects in Brazil), sampled different structural elements to measure the ... Thesis Tundra Repositório Institucional Universidade Federal de São Carlos (RI UFSCar) Canada |
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Open Polar |
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Repositório Institucional Universidade Federal de São Carlos (RI UFSCar) |
op_collection_id |
ftunivfsaocarlos |
language |
Portuguese |
topic |
Conservação Cerrados Influência de borda Cadeias de Markov Transformada de Wavelet Diversidade estrutural Efeitos de borda Gramíneas invasoras Modelos autoregressivos Padrão espacial Tundra CIENCIAS BIOLOGICAS::ECOLOGIA |
spellingShingle |
Conservação Cerrados Influência de borda Cadeias de Markov Transformada de Wavelet Diversidade estrutural Efeitos de borda Gramíneas invasoras Modelos autoregressivos Padrão espacial Tundra CIENCIAS BIOLOGICAS::ECOLOGIA Dodonov, Pavel Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial |
topic_facet |
Conservação Cerrados Influência de borda Cadeias de Markov Transformada de Wavelet Diversidade estrutural Efeitos de borda Gramíneas invasoras Modelos autoregressivos Padrão espacial Tundra CIENCIAS BIOLOGICAS::ECOLOGIA |
description |
Edge influence, the set of modifications in the natural environment next to abrupt anthropogenic or natural edges, is a serious threat to biodiversity in fragmented environments. Common examples of edge influence include an increased abundance of exotic species and modifications in vegetation structure and/or composition. Edges of linear disturbances, such as roads, powerlines, and firebreaks, are especially important due to their ubiquity in the landscape. Although such disturbances are much narrower than other anthropogenic land uses, they have been shown to affect adjacent plant and animal communities. The combination of edge influence with the natural variation in vegetation may lead to complex and not easily discernible patterns. However, this natural variation is not usually taken into account in studies of edge influence. We employed a spatial pattern approach to study edge influence from narrow linear disturbances while accounting for variation in vegetation (both natural and from disturbance history), in Brazilian cerrado and in Canadian forest-tundra ecotone. Our main objectives were 1) to assess the overall heterogeneity in the cover of native and invasive graminoids, structural diversity and species composition, and 2) to verify whether the spatial pattern of different response variables is affected by anthropogenic edges. Secondary objectives include: 3) to explore different ways in which wavelet transforms and Monte Carlo simulations may be used to assess edge influence, 4) to compare different structural diversity indices, and 5) to assess whether the spatial patterns of different plant species are related to their functional traits. We sampled five 300-1350 m-long transects, three in Brazil and two in Canada. The transects contained one to five anthropogenic edges and one to ten natural edges and were divided into contiguous 1x1 m quadrats. In each quadrat, we estimated the cover of native and invasive graminoids (two transects in Brazil), sampled different structural elements to measure the ... |
author2 |
Matos, Dalva Maria da Silva http://lattes.cnpq.br/4728734263109138 http://lattes.cnpq.br/9008153877455949 |
format |
Thesis |
author |
Dodonov, Pavel |
author_facet |
Dodonov, Pavel |
author_sort |
Dodonov, Pavel |
title |
Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial |
title_short |
Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial |
title_full |
Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial |
title_fullStr |
Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial |
title_full_unstemmed |
Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial |
title_sort |
avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial |
publisher |
Universidade Federal de São Carlos |
publishDate |
2015 |
url |
https://repositorio.ufscar.br/handle/ufscar/1858 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
DODONOV, Pavel. Avaliação da influência de borda em vegetação heterogênea com análise de padrão espacial. 2015. 246 f. Tese (Doutorado em Ciências Biológicas) - Universidade Federal de São Carlos, São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/1858 |
op_rights |
Acesso Aberto |
_version_ |
1809946925109084160 |