Effect of human-induced forest edges on the understory bird community in Hyrcanian forests in Iran: Implication for conservation and management

Mahmoudi, Saleh; Ilanloo, Sayyad Sheykhi; Shahrestanaki, Aqil Keyvanloo; Valizadegan, Negin; Yousefi, Masoud

doi:10.1016/j.foreco.2016.10.011

Cited by 18 publications

(10 citation statements)

References 28 publications

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“…Bark-gleaning woodpeckers and understory insectivores (trogons and kingfishers) also were negatively affected by the edge. Their richness and abundance were higher in the interior and positively related to the basal area, density of large trees and canopy cover, which has also been reported by Mahmoudi et al (2016), and Whelan and Maina (2005). This group of birds may also avoid edge areas due to the rarity of particular foraging and nesting substrates, including larger trees and stumps (Newton 1994;Lindell et al 2004).…”

Section: Influence Of Vegetation Structure On Avian Communitysupporting

confidence: 62%

Road induced edge effects on a forest bird community in tropical Asia

et al. 2018

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Background: Edge effects cause changes in bird community richness, abundance, and/or distribution within a landscape, but the avian guilds most influenced can vary among regions. Although Southeast Asia has the highest rates of deforestation and projected species loss, and is currently undergoing an explosive growth in road infrastructure, there have been few studies of the effects of forest edges on avian communities in this region. Methods:We examined avian community structure in a dry evergreen forest in northeastern Thailand adjacent to a five-lane highway. We evaluated the richness and abundance of birds in 11 guilds at 24 survey points on three parallel transects perpendicular to the edge. At each point, 10-min surveys were conducted during February-August 2014 and March-August 2015. Vegetation measurements were conducted at 16 of the bird survey points and ambient noise was measured at all 24 survey points. Results:We found a strongly negative response to the forest edge for bark-gleaning, sallying, terrestrial, and understory insectivores and a weakly negative response for arboreal frugivore-insectivores, foliage gleaning insectivores, and raptors. Densities of trees and the percentage canopy cover were higher in the interior, and the ambient noise was lower. In contrast, arboreal nectarivore-insectivores responded positively to the forest edge, where there was a higher vegetation cover in the ground layer, a lower tree density, and a higher level of ambient noise. Conclusion:Planners should avoid road development in forests of high conservation value to reduce impacts on biodiversity. Where avoidance is impossible, a number of potential mitigation methods are available, but more detailed assessments of these are needed before they are applied in this region.

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Section: Influence Of Vegetation Structure On Avian Communitysupporting

confidence: 62%

Road induced edge effects on a forest bird community in tropical Asia

et al. 2018

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“…Habitat fragmentation also conditions the distribution and diversity of birds (Anjos et al, 2011; Barbaro & van Halder, 2009; Ewers & Didham, 2006; Vetter, Hansbauer, Végvári, & Storch, 2011). In assessing the effect of edge on bird diversity, Batáry, Fronczek, Normann, Scherber, and Tscharntke (2014) showed that bird abundance and diversity increased close to edges, while in evaluating the effect of human‐induced forest edges on bird community, Mahmoudi, Ilanloo, Shahrestanaki, Valizadegan, and Yousefi (2016) found that some bird species avoid edges. Such differential patterns would depend on multiple traits, including body size, feeding guild, as well as the degree of habitat specialisation (Barbaro & van Halder, 2009; Ewers & Didham, 2006; Vetter et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The effect of microhabitat features, anthropogenic pressure and spatial structure on bird diversity in southern Tunisian agroecosystems

Hamza

Hanane²

2021

Annals of Applied Biology

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In southern Tunisia, oases and olive orchards are the two main agroecosystems, hence the importance of investigating their value for native fauna. Using generalised linear mixed models, we assessed the relative value of oases and olive plantations over the wintering and the breeding periods by comparing their avifauna diversity using the Shannon diversity index. We also used data on a series of microhabitat features, anthropogenic pressure and spatial parameters to identify the best predictors of bird diversity. In total, 32 species belonging to 18 families were recorded. Sedentary birds accounted for 47% of the counts. Our results showed that bird diversity depends on habitat type, being higher in oases than in olive plantations, but not on the season as no difference was recorded during the two periods of wintering and breeding. The assessment of the effects of microhabitat features, anthropogenic pressure and spatial structure revealed that bird diversity was positively influenced by the cover of trees in oases and olive orchards, negatively affected by distance to edge and that to the paved road in the olive orchards and spatially structured in both agroecosystems. Variation partitioning analysis revealed that the pure effect of microhabitat features (tree cover) was important in explaining the bird diversity both in oases and olive orchards. The identification of factors affecting bird diversity is of great importance for the efficient management of these agroecosystems. Special attention should be paid to keeping a good tree cover. This cannot be performed without: (a) increasing irrigation frequency, (b) adequate tree maintenance (pruning) and (c) reduction of pesticide application. Also, the synergy among owners, farmers, managers and researchers is recommended for the conservation of bird diversity in this North African arid agricultural region.

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“…The Elburz Mountains are a biodiversity hotspot in Iran (Anderson, 1999;Majnoonian et al, 2005;Akhani et al, 2013;Moradi et al, 2018). While plant species and the environmental drivers of their distributions have been studied extensively in the Elburz Mountains (Noroozi et al, 2010;Akhani et al, 2013;Ravanbakhsh and Moshki, 2016), animal distributions and their drivers remain poorly known (Ahmadzadeh et al, 2013;Mahmoudi et al, 2016;Ashoori et al, 2018).…”

Section: Introductionmentioning

confidence: 99%