Bird species dynamics in a managed southern boreal forest in Finland

Virkkala, Raimo

doi:10.1016/j.foreco.2004.02.037

Cited by 38 publications

(14 citation statements)

References 36 publications

(35 reference statements)

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“…Furthermore, variation of the most common species was rather similar between the landscapes: variances differed statistically significantly between the three areas only in two out of the 10 most common species. One of these species, the siskin, is known to occur sporadically, as it is a seed eater of spruce (Va¨isa¨nen et al 1998;Virkkala 2004). Bird assemblages of the three landscapes are similar not only in terms of species composition and species density, but also in species spatial density variation patterns across the landscapes.…”

Section: Discussionmentioning

confidence: 99%

Spatial Variation of Bird Species in Landscapes Dominated by Old-growth Forests in Northern Boreal Finland

Virkkala

Rajasärkkä²

2006

Biodivers Conserv

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An important issue in conservation planning is to study the distribution and abundance patterns of species in natural landscapes. Information of concordant and clumped species distribution pattertns can enhance attempts to focus conservation efforts in sites/areas preferred by various species. We compared bird species abundance, community composition and species distribution patterns in three large old-growth forest areas (size 40-120 km 2 ) in northern boreal Finland on the basis of quantitative bird censuses. Total bird density and species composition, and mean density and variances of the most abundant species were highly similar between the three areas. Most of the bird species were distributed randomly within the areas and species preferring old-growth forests showed compensatory density variation without preference for any sub-area. Mean density of species preferring old-growth forests was significantly higher in the studied large old-growth forests than in smaller old-growth forests and was about threefold higher than regional density of species in a predominantly managed landscape matrix. Bird species preferring oldgrowth forests are probably not dependent on a certain specific part of a virgin boreal forest landscape but rather on the overall size of the high-quality and diverse old-growth forest area.

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Section: Discussionmentioning

confidence: 99%

Spatial Variation of Bird Species in Landscapes Dominated by Old-growth Forests in Northern Boreal Finland

Virkkala

Rajasärkkä²

2006

Biodivers Conserv

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“…One reason can be that, in these mostly naturally regenerated and thus relatively species rich stands (Lõhmus and Kraut, 2010), stand composition effects are mostly manifested in the presence of particular tree species. For example, Populus tremula is the most important cavity-tree species throughout its range (Remm and Lõhmus, 2011), while Picea abies may be essential for some specialized seed-eaters (Virkkala, 2004). Such effects can be hidden in the simple measure of tree-species diversity (e.g.…”

Section: Effects Of Forest Structurementioning

confidence: 99%

Bird communities in hemiboreal old-growth forests: The roles of food supply, stand structure, and site type

Rosenvald

Lõhmus

Kraut

et al. 2011

Forest Ecology and Management

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“…In the line transect method a 50 m wide main belt along the walking line and a supplementary belt outside the main belt are separated. The supplementary belt consists of all the birds observed outside the main belt (Järvinen & Väisänen 1976, Järvinen et al 1991, Väisänen et al 1998, Virkkala 2004.…”

Section: мAterials and мEthodsmentioning

confidence: 99%

Гнездовая Биология Грача (Corvus Frugilegus) В Антропогенно Измененных Степных Экосистемах (На Примере Ботиевской Вэс)

Dranga¹,

Gorlov²,

Matsyura³

et al. 2016

Biol. Bull. of Bogdan Chmelnitskiy Melitopol St. Pedag. Univ.

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The article gives a space-structural characteristic of rook (Corvus frugilegus) nesting places in the territory of Botievo wind farm (Zaporizhzhia region). The distribution of the rook colonies around the territory, the structure of the colonies, the dependence of the location of the nests on the height, diameter, condition and species composition of tree and shrub plantings are analyzed and studied. The types and methods of the localization of nests in the trees and their quantitative characteristics are highlighted. The consortium relations of the rook and the risks associated with living near existing wind turbines are described.In 2015 some eight colonies were found: 2 medium (51-100 nests) and 6 large (101-500 nests) ones. All the colonies were located in the forest belts, mainly represented by locust trees Gleditsia triacanthos (7 colonies) and in the mixed forest consisting of the mulberry Morus sp., maple Acer, black locust Robinia pseudoacacia, and locust trees (1 colony). The area occupied by colonies had a four-fold difference between 977-3994 m 2 , while the number of the rook nests fluctuated in a seven-fold range -52-343 nests.Analysis of different indicators describing the structure of the rook colonies revealed certain dependence between the breeding area and the number of the occupied trees (r = 0.97); the breeding area and the number of nests (r = 0.60); the number of nests in the colony and the closeness of the trees in the forest belts (r = 0.91); the number of nests and the number of the occupied trees (r = 0.74), the height of the tree and the nest on it (r = 0.64). The characteristic of the location of nests in different rows of the forest belt revealed the shift of the density of the occupation of trees in large colonies to one of the outer rows, where there were 26.0-27.5 percent of all the nests.Typology and localization of rook nests in the trees has 11 options of the location. The type of the location of nests near the trunk of the tree dominated (57.4 percent of trees and 64.5 percent of all nests). It is shown that rooks demonstrate the plasticity of the nesting behaviour to the changing environmental conditions. Keywords: Rook (Corvus frugilegus), Zaporizhia region, wind farm, nesting area, colony structure, spatial distribution, colony.Colonial nesting is a testing ground for the development of many biological problems: the theory of evolution and understanding of the factors of microevolution,

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Bird species dynamics in a managed southern boreal forest in Finland

Cited by 38 publications

References 36 publications

Spatial Variation of Bird Species in Landscapes Dominated by Old-growth Forests in Northern Boreal Finland

Spatial Variation of Bird Species in Landscapes Dominated by Old-growth Forests in Northern Boreal Finland

Bird communities in hemiboreal old-growth forests: The roles of food supply, stand structure, and site type

Гнездовая Биология Грача (Corvus Frugilegus) В Антропогенно Измененных Степных Экосистемах (На Примере Ботиевской Вэс)

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