Herbaceous ground cover reduces nest predation in olive groves

Castro-Caro, Juan C.; Carpio, Antonio J.; Tortosa, Francisco S.

doi:10.1080/00063657.2014.961894

Cited by 18 publications

(12 citation statements)

References 54 publications

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“…Increased predation, in turn, can also affect the distribution of nest sites among vertical strata (Silvia and Voltolini, 2015). A couple of studies have shown that bird nests on the ground were more vulnerable to predators than nest in low vegetation (Castro-Caro et al, 2014). However, we have not found any studies evaluating the effect of local habitat disturbance and vertical stratification on bird nest predation in Atlantic rainforest.…”

Section: Resultsmentioning

confidence: 65%

“…We also corroborate our second hypothesis as we found that egg predation was higher on the ground than in trees. The high predation rates on the ground can be related to the greater abundance of terrestrial than arboreal predators (Castro-Caro et al, 2014). It is also plausible that predation of nests by non-avian species, such as rodents and lizards, may increase in fragments near urban areas, as in our forest fragments.…”

Section: Ddmentioning

confidence: 99%

“…It is also plausible that predation of nests by non-avian species, such as rodents and lizards, may increase in fragments near urban areas, as in our forest fragments. Two studies have previously reported that bird nests were more vulnerable to predators on the ground than in low vegetation (Castro-Caro et al, 2014;Silvia and Voltolini, 2015). However, this is the first study that evaluates the effect of local habitat disturbance and vertical stratification on bird nest predation in Atlantic rainforest.…”

Section: Ddmentioning

confidence: 99%

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Local habitat disturbance increases bird nest predation in the Brazilian Atlantic rainforest

Rodrigues¹,

Jesus²,

Campos³

2018

Anim. Biodiv. Conserv.

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Local habitat disturbance increases bird nest predation in the Brazilian Atlantic rainforest. We evaluated the effect of anthropogenic disturbance on nest predation in Brazilian Atlantic forest. Artificial nests were distributed in fragments with distinct degrees of anthropogenic disturbance. We found a higher proportion of egg predation on the ground and in the fragments classified as 'high' and 'medium' disturbance than in the fragments classified as 'low' degree of disturbance. The higher egg predation is probably linked to low structural complexity of vegetation and high accessibility of these areas to opportunistic predators. We suggest that forest fragments with high vegetation complexity and low human activity should be preserved in order to maintain the biodiversity of bird species.

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Section: Resultsmentioning

confidence: 65%

Section: Ddmentioning

confidence: 99%

Section: Ddmentioning

confidence: 99%

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Local habitat disturbance increases bird nest predation in the Brazilian Atlantic rainforest

Rodrigues¹,

Jesus²,

Campos³

2018

Anim. Biodiv. Conserv.

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“…The breeding season is a critical phase in the annual life cycle of birds, with important consequences to population growth and survival [23–26]. Nest predation rates usually vary between 44% and 86% depending on habitat type and species [27]; vegetation structure (i.e., micro habitat) is a significant factor that may affect nest predation [28–30].…”

Section: Introductionmentioning

confidence: 99%

Increased songbird nest depredation due to Aleppo pine (Pinus halepensis) encroachment in Mediterranean shrubland

et al. 2019

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BackgroundIn recent decades, a decrease of passerine densities was documented in Mediterranean shrublands. At the same time, a widespread encroachment of Aleppo pines (Pinus halepensis) to Mediterranean shrubland occurred. Such changes in vegetation structure may affect passerine predator assemblage and densities, and in turn impact passerine densities. Depredation during the nesting season is an important factor to influence passerine population size. Understanding the effects of changes in vegetation structure (pine encroachment) on passerine nesting success is the main objective of this study. We do so by assessing the effects of Aleppo pine encroachment on Sardinian warbler (Sylvia melanocephala) nest depredation in Mediterranean shrublands. We examined direct and indirect predation pressures through a gradients of pine density, using four methods: (1) placing dummy nests; (2) acoustic monitoring of mobbing events; (3) direct observations on nest predation using cameras; and (4) observation of Eurasian jay (Garrulus glandarius) behaviour as indirect evidence of predation risk.ResultsWe found that Aleppo pine encroachment to Mediterranean shrublands increased nest predation by Eurasian jays. Nest predation was highest in mixed shrubland and pines. These areas are suitable for warblers but had high occurrence rate of Eurasian jays.ConclusionsEncroaching pines directly increase activity of Eurasian jays in shrubland habitats, which reduced the nesting success of Sardinian warblers. These findings are supported by multiple methodologies, illustrating different predation pressures along a gradient of pine densities in natural shrublands. Management of Aleppo pine seedlings and removal of unwanted trees in natural shrubland might mitigate arrival and expansion of predators and decrease the predation pressure on passerine nests.

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“…The breeding season is a critical phase in the annual life cycle of birds, with important consequences to population growth and survival (Fuller et al 1995;Gates and Gysel 1978;Ricklefs 1969;Yom-Tov 1974). Nest predation rates usually vary between 44% to 86% depending on habitat type and species (Martin 1988); vegetation structure (i.e., micro habitat) is a significant factor that may affect nest predation (Castro-Caro et al 2014;Howlett and Stutchbury 1996;LaManna et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Increased songbird nest depredation due to Aleppo pine (Pinus halepensis) encroachment in Mediterranean shrubland

Ben-David

Shamon

Izhaki

et al. 2019

Preprint

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Background In recent decades, a decrease of passerine densities was documented in Mediterranean shrublands. At the same time, a widespread encroachment of Aleppo pines ( Pinus halepensis ) to Mediterranean shrubland occurred. Such changes in vegetation structure may affect passerine predator assemblage and densities, and in turn impact passerine densities. Depredation during the nesting season is an important factor to influence passerine population size. Understanding the effects of changes in vegetation structure (pine encroachment) on passerine nesting success is the main objective of this study. We do so by assessing the effects of Aleppo pine encroachment on Sardinian warbler ( Sylvia melanocephala ) nest depredation in Mediterranean shrublands. We examined direct and indirect predation pressures through a gradients of pine density, using four methods: (1) placing dummy nests; (2) acoustic monitoring of mobbing events; (3) direct observations on nest predation using cameras; and (4) observation of Eurasian jay ( Garrulus glandarius ) behaviour as indirect evidence of predation risk. Results We found that Aleppo pine encroachment to Mediterranean shrublands increased nest predation by Eurasian jays. Nest predation was highest in mixed shrubland and pines. These areas are suitable for warblers but had high occurrence rate of Eurasian jays. Conclusions Encroaching pines directly increase activity of Eurasian jays in shrubland habitats, which reduced the nesting success of Sardinian warblers. These findings are supported by multiple methodologies, illustrating different predation pressures along a gradient of pine densities in natural shrublands. Management of Aleppo pine seedlings and removal of unwanted trees in natural shrubland might mitigate arrival and expansion of predators and decrease the predation pressure on passerine nests.

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Herbaceous ground cover reduces nest predation in olive groves

Cited by 18 publications

References 54 publications

Local habitat disturbance increases bird nest predation in the Brazilian Atlantic rainforest

Local habitat disturbance increases bird nest predation in the Brazilian Atlantic rainforest

Increased songbird nest depredation due to Aleppo pine (Pinus halepensis) encroachment in Mediterranean shrubland

Increased songbird nest depredation due to Aleppo pine (Pinus halepensis) encroachment in Mediterranean shrubland

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