Positive roadside edge effects on artificial nest survival in a lowland Atlantic Forest

Samples were collected every month in three different sites of the Reserva Biológica do Tinguá, Brazil: site A was located on the border of the forest and sites B and C were located 1,000 and 500 m, respectively, towards the forest interior. The objective was to determine edge effects on a fragment of the Atlantic Forest. The greatest species richness was observed in sites A and B (23 species), compared with site C (16 species). Site A showed the greatest abundance and constancy, independent of the degree of synanthropy. Asynanthropic species were more abundant and constant in sites B and C. Site B showed the greatest diversity; and sites A and B showed the greatest similarity of populations. There was no significant correlation between Calliphoridae richness and canopy openness except in site C. Richness and abundance were positively correlated with subwood density, except for richness in site B.

Download Full-text

Effects of tourism on nest survival rate of Galliformes based on artificial nest experiment

Acta Ecologica Sinica ◽

10.5846/stxb201812252804 ◽

2020 ◽

Vol 40 (4) ◽

Author(s):

陆帅 LU Shuai ◽

李建强 LI Jianqiang ◽

田姗 TIAN Shan ◽

华俊钦 HUA Junqin ◽

吴嘉君 WU Jiajun ◽

...

Keyword(s):

Survival Rate ◽

Nest Survival ◽

Artificial Nest ◽

Artificial Nest Experiment

Download Full-text

Edge Effects and Seedling Bank Depletion: The Role Played by the Early Successional Palm Attalea oleifera (Arecaceae) in the Atlantic Forest

Biotropica ◽

10.1111/j.1744-7429.2009.00555.x ◽

2009 ◽

Vol 42 (2) ◽

pp. 158-166 ◽

Cited By ~ 26

Author(s):

Antônio Venceslau Aguiar ◽

Marcelo Tabarelli

Keyword(s):

Atlantic Forest ◽

Edge Effects ◽

Seedling Bank

Download Full-text

Edge effects on fern community in an Atlantic Forest remnant of Rio Formoso, PE, Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842011000300011 ◽

2011 ◽

Vol 71 (2) ◽

pp. 421-430 ◽

Cited By ~ 11

Author(s):

IAA Silva ◽

AFN Pereira ◽

ICL Barros

Keyword(s):

Comparative Analysis ◽

Atlantic Forest ◽

Edge Effect ◽

Edge Effects ◽

Sensitive Species ◽

Forest Remnant ◽

Fern Species ◽

The Creation ◽

Abundance And Diversity

We have investigated how edge effects influence the fern community of Jaguarão Forest (08º 35' 49" S and 35º 15' 39" W), located in the district of Rio Formoso, Pernambuco, Brazil. A comparative analysis was made of the interior and edge of the fragment of forest, regarding the richness, abundance and diversity of ferns in the two areas. Six plots of 10 × 20 m were chosen, three in each area. A total of 381 ferns were recorded, which were distributed among 25 species, 17 genera and 12 families. The two areas (edge and interior) were found to differ, with distinct relative air humidities and temperatures (p = 0.00254 and p = 0.00019, respectively). The interior showed higher diversity (t = 7.251 and p = 0.018) and richness (t = 6.379 and p = 0.023) than the edge area, but the same abundance (t = 1.728; p = 0.226) as the edge. Regarding the composition of the flora, it was clear that the interior is a habitat completely distinct from the edge with regard to the fern community, given that only one species, Adiantum petiolatum Desv., was common to both environments. It was concluded that the edge effect causes a decrease in richness and abundance of the fern species found in Jaguarão Forest, where the more sensitive species are being replaced by species that are tolerant to the disturbance caused by the creation of an edge.

Download Full-text

Agroforestry system as a buffer zone in a Brazilian Atlantic Forest conservation unit: an artificial nest predation perspective

Biota Neotropica ◽

10.1590/1676-0611-bn-2017-0373 ◽

2018 ◽

Vol 18 (1) ◽

Author(s):

Camila André Galvão ◽

Mercival Roberto Francisco ◽

Marcelo Nivert Schlindwein

Keyword(s):

Atlantic Forest ◽

Nest Predation ◽

Buffer Zone ◽

Agroforestry System ◽

Camera Traps ◽

Primary Forest ◽

Forest Fragments ◽

Artificial Nest ◽

Buffer Zones ◽

Predator Species

Abstract Here we inferred about the effectiveness of a buffer zone composed by an Agroforestry System (AS) for providing reproductive conditions for Atlantic Forest birds by comparing artificial nest predation rates between a buffer zone, a primary forest area, and a set of small and isolated Atlantic Forest fragments. We have used 237 nests throughout the three areas, of which 100 (42.2%) were depredated. Predation frequencies were 28.6% in the continuous forest, 100% in the AS, and 51.9% in the fragments, differing significantly. We could detect nest predators in 48 of the 100 depredated nests (48%) using camera traps. Differences between areas may be attributed to changes in nest predator species. We support previous evidences that the conservation of bird communities may not rely on buffer zones as an extension of their breeding habitats.

Download Full-text

Evidence for Edge Effects on Multiple Levels in Tallgrass Prairie

The Condor ◽

10.1093/condor/102.2.256 ◽

2000 ◽

Vol 102 (2) ◽

pp. 256-266 ◽

Cited By ~ 30

Author(s):

Maiken Winter ◽

Douglas H. Johnson ◽

John Faaborg

Keyword(s):

Tallgrass Prairie ◽

Edge Effects ◽

Fragment Size ◽

Nest Survival ◽

Forest Edge ◽

Nesting Success ◽

Forest Edges ◽

Artificial Nests ◽

Spiza Americana ◽

Ammodramus Henslowii

Abstract We tested how edges affect nest survival and predator distribution in a native tallgrass prairie system in southwestern Missouri using artificial nests, natural nests of Dickcissels (Spiza americana) and Henslow's Sparrows (Ammodramus henslowii), and mammal track stations. Survival of artificial nests was lower within 30 m of forest edge. Nesting success of Dickcissels and Henslow's Sparrows was lower within 50 m to a shrubby edge than at greater distances, whereas fates of nests were not related to distances to roads, agricultural fields, or forests. Evidence from clay eggs placed in artificial nests indicated that mid-sized carnivores were the major predators within 30 m of forest edges. Furthermore, mid-sized carnivores visited track stations most frequently within 50 m of forest edges. Because proximity of woody habitat explained more variation in nest survival and mammal activity than did fragment size, it appears that edge effects were more pronounced than area effects. Edge effects appeared to be caused mainly by greater exposure of nests to mid-sized carnivores. We argue that, based on edge avoidance behavior, “grassland-interior” species such as the Henslow's Sparrow respond to edge effects mainly by a decrease in density, whereas habitat generalists such as the Dickcissel are affected mainly by a decrease in nesting success.

Download Full-text

The magnitude and extent of edge effects on vascular epiphytes across the Brazilian Atlantic Forest

Scientific Reports ◽

10.1038/s41598-020-75970-1 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Edicson Parra-Sanchez ◽

Cristina Banks-Leite

Keyword(s):

Atlantic Forest ◽

Edge Effects ◽

Forest Cover ◽

Species Abundance ◽

Conservation Strategy ◽

Suitable Habitat ◽

Forest Fragments ◽

Brazilian Atlantic Forest ◽

Vascular Epiphytes ◽

Epiphyte Communities

Abstract Edge effects are ubiquitous landscape processes influencing over 70% of forest cover worldwide. However, little is known about how edge effects influence the vertical stratification of communities in forest fragments. We combined a spatially implicit and a spatially explicit approach to quantify the magnitude and extent of edge effects on canopy and understorey epiphytic plants in the Brazilian Atlantic Forest. Within the human-modified landscape, species richness, species abundance and community composition remained practically unchanged along the interior-edge gradient, pointing to severe biotic homogenisation at all strata. This is because the extent of edge effects reached at least 500 m, potentially leaving just 0.24% of the studied landscape unaffected by edges. We extrapolated our findings to the entire Atlantic Forest and found that just 19.4% of the total existing area is likely unaffected by edge effects and provide suitable habitat conditions for forest-dependent epiphytes. Our results suggest that the resources provided by the current forest cover might be insufficient to support the future of epiphyte communities. Preserving large continuous ‘intact’ forests is probably the only effective conservation strategy for vascular epiphytes.

Download Full-text