Does Linear Canopy Openings in a Lowland Atlantic Tropical Forest Cause Edge Effects on Seedling Communities?

Rodrigues, Pablo José Francisco Pena; Iguatemy, Mariana A.; Nascimento, Marcelo Trindade

doi:10.4236/oje.2014.415078

Cited by 4 publications

(7 citation statements)

References 38 publications

(23 reference statements)

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“…; Pena Rodrigues et al. ). In prior work, dominant canopy species strongly influenced the composition of understorey communities in hemlock‐hardwood forests (Frelich ; Frelich & Reich ) and pine barren communities (Brosofske et al.…”

Section: Discussionmentioning

confidence: 98%

“…Globally, researchers have extensively studied the effective size of forest fragments (Lovejoy & Oren 1981;Harris 1984;Chen et al 1992;Jules et al 1999;Euskirchen et al 2001;Russell & Jones 2001;Harper et al 2005;Chabrerie et al 2013;Pena Rodrigues et al 2014;Haddad et al 2015). The limit of an edge effect is determined using a variety of statistical methods and is often delineated as a singular distance in space.…”

Section: Introductionmentioning

confidence: 99%

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A new application of change point analysis reveals extensive edge effects on a temperate mixed forest

Michels

Hotchkiss

Jonaitis

et al. 2017

Applied Vegetation Science

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Questions How do landscape changes along edges of protected areas affect forest interiors and stand development? What are the locations, spatial extents and magnitudes of these effects? Location The 8500‐ha Sylvania Wilderness Area, Michigan's Upper Peninsula, USA. Methods We conducted vegetation surveys in 202 plots in ten transects crossing the Sylvania Wilderness border in 2013 and 2014. We recorded characteristics of forest structure, trees, shrubs, saplings, seedlings and herbaceous species. We constructed GLMM to estimate the location, spatial extent and magnitude of change of edge effects on Sylvania with a range of possible edge effect locations and widths of effect. We selected best‐fit models that minimized the AIC and applied likelihood ratio tests to assess the statistical significance of each edge effect. Results Overall, evidence of edge effects occurred up to 625 m into the Sylvania Wilderness, with most significant changes occurring within 400 m of the wilderness border. Wide zones of change occurred across the wilderness border, while zones of change farther from the edge tended to be narrower, suggesting that distinct environments are established beyond the transitional habitats surrounding the border region. Canopy‐level and understorey‐level variables exhibited the largest magnitudes and steepest gradients of change, indicating these communities are strongly influenced by edge effects in this forest system. Canopy‐level heterogeneity also increased approaching the internal core area of Sylvania. Conclusions In this case study, we applied a linear change point model and found a minimum buffer zone of 400 m to mitigate edge effects in an old‐growth temperate mixed forest. Regionally, land managers could implement this buffer to existing edges of protected areas or negotiate this buffer zone in land acquisitions. A more stringent buffer zone of 625 m internal and 250 m external to old‐growth forests would be ideal. This application of change point analysis provides a simple, efficient method to establish effective buffer zones and to identify functional groups or ecosystem attributes for which edge effects are of greatest conservation concern. We recommend modifying our open‐source change point package to estimate local edge effects that take into account regional characteristics.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A new application of change point analysis reveals extensive edge effects on a temperate mixed forest

Michels

Hotchkiss

Jonaitis

et al. 2017

Applied Vegetation Science

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“…Thus, light intensity, air temperature and intensity of winds are higher on the edge of the forest remnants, which result in lower moisture in the air and in the soil, in comparison to the interior of these ecosystems (SIQUEIRA et al, 2004). As consequence of this condition, the structure of the tree community is smaller, with lower densities of taller trees and presents higher mortality on the edge, when compared to the interior of tropical rain forest fragments (RODRIGUES et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

“…This phenomenon is called edge effect and in the Atlantic Rain Forest, it is responsible for high mortality of trees (SANTOS et al, 2008). Edge effect also influences the establishment of a tree community with high density of small individuals, mainly composed by pioneer species (RODRIGUES et al, 2014) and deciduous species that shed their leaves to minimize water loss in the dry season (HOLANDA et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Atlantic Forest Size Effect on Structure and Composition of Soil Arthropods Community, Rj, Brazil

Camara

Pereira

Gomes

et al. 2017

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Forest fragmentation may influence the soil fauna community. This study aimed to test the hypothesis that exists differences in the structure and composition of the soil arthropod communities among three Atlantic Rain Forest fragments with different sizes (SF: small; MF: medium and LF: large fragment) in Teresópolis, Rio de Janeiro, Brazil. The sample of the organisms occurred by means of random stratified installation of pitfall traps, during the rainy and dry seasons. The organisms were identified in taxonomic groups (mainly in order). The tested hypothesis was corroborated because the soil arthropod communities with more complex structure occurred in the MF (higher values of evenness and diversity) and in the LF (higher richness), which presented more similarity to each other, in comparison to the SF (higher total abundance). Collembola, Coleoptera, Chilopoda, Hymenoptera, Enchytraeidae and Blattodea featured the MF and the LF, whereas the SF favored Formicidae. Keywords: Biodiversity; edge effect; forest fragmentation; soil fauna; tropical forests. ResumoEfeito do tamanho de fragmentos de Mata Atlântica sobre a estrutura e composição da comunidade de artrópodes do solo, RJ, Brasil. A fragmentação florestal pode influenciar a comunidade da fauna do solo. Este trabalho objetivou testar a hipótese de que existe diferença na estrutura e composição das comunidades de artrópodes do solo entre três fragmentos de Mata Atlântica com diferentes tamanhos (FP: fragmento pequeno; FM: fragmento médio; FG: fragmento grande) em Teresópolis, Rio de Janeiro, Brasil. A amostragem de organismos ocorreu por meio de armadilhas de queda instaladas de maneira aleatória estratificada, nas estações chuvosa e seca. Os organismos foram identificados em grupos taxonômicos (ordem, principalmente). A hipótese testada foi corroborada, uma vez que a comunidade de artrópodes do solo com estrutura mais complexa ocorreu no FM (maiores valores de uniformidade e diversidade) e no FG (maior riqueza), os quais apresentaram maior similaridade entre si, em comparação com o FP (maior abundância total). Collembola, Coleoptera, Chilopoda, Hymenoptera, Enchytraeidae e Blattodea caracterizaram o FM e o FG, enquanto que o FP favoreceu Formicidae. Palavras-chave: Biodiversidade; efeito de borda; fragmentação florestal; fauna do solo; florestas tropicais.

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“…As mentioned, many factors are effective in dispersing and establishing forest regeneration patches [16]. Since various geographical positions use sun energy and light unequally, ecologic position and vegetation image are different in various positions [3].…”

Section: Introductionmentioning

confidence: 99%

Assessment Capability Forest Regeneration in Different Geographical Aspects Approach Landscape Ecology

Karami¹,

Karimi²,

Shahi³

2017

OJE

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In order to determine the relationship between physiographical factors and regeneration changes in forests, and to improve and model natural regeneration status, Gorazbon district in Kheyrod Forest was selected for the study. All available regeneration patches in the area were selected. To achieve spatial structure and quantify metrics related to regeneration patches, the analysis of landscape metrics was used. The results show that 692 regeneration patches were identified at the level of different directions. LAND Metric show the most regeneration percent is related to the western (9%), southern (8.66%), flat areas (8.33%), northern (5.68%) and eastern (4.73%), respectively. In total, the patch coverage level percentage was calculated in the landscape (8.31%). The results related to patch shape metric show that most shapes of patches follow polygon structures and do not have fixed shapes. Results related to the average area of the patch metric show that the average level of patches is between 4 and 5 R. The maximum and minimum distance between patches was observed in the survey between 39 and 520 m respectively. According to the results of the distance average between patch metric, the distribution of patches is random in the southern and western directions, flat areas and pile, but it is uniform in northern directions. It should be noted that the distribution and structure of patches in the northern directions has a better distribution and homogeneity than the other directions. Its canals are used as a natural regeneration model to follow the natural phenomena in forest sustainable management.

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Does Linear Canopy Openings in a Lowland Atlantic Tropical Forest Cause Edge Effects on Seedling Communities?

Cited by 4 publications

References 38 publications

A new application of change point analysis reveals extensive edge effects on a temperate mixed forest

A new application of change point analysis reveals extensive edge effects on a temperate mixed forest

Atlantic Forest Size Effect on Structure and Composition of Soil Arthropods Community, Rj, Brazil

Assessment Capability Forest Regeneration in Different Geographical Aspects Approach Landscape Ecology

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