Farmland birds occupying forest clear-cuts respond to both local and landscape features

FOREST ECOLOGY AND MANAGEMENT

卷:478

Article

Bakx, Tristan R. M.^1,5  Lindstrom, Ake¹  Ram, Dafne¹  Pettersson, Lars B.¹  Smith, Henrik G.^1,3  van Loon, E. Emiel²  Caplat, Paul^3,4 

[1] Lund Univ, Dept Biol, Solvegatan 37, S-22362 Lund, Sweden

[2] Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, Sci Pk 904, NL-1090 GE Amsterdam, Netherlands

[3] Lund Univ, Ctr Environm & Climate Res, Solvegatan 37, S-22362 Lund, Sweden

[4] Queens Univ Belfast, Sch Biol Sci, 19 Chlorine Gardens, Belfast BT9 5D1, Antrim, North Ireland

[5] Lund Univ, Dept Phys Geog & Ecosyst Sci, Solvegatan 12, S-22362 Lund, Sweden

关键词: Emberiza citrinella;    Lanius collurio;    Forestry;    Farmland bird;    Habitat selection;   

DOI  :  10.1016/j.foreco.2020.118519

来源: Elsevier

【 摘 要 】

Agricultural landscapes have changed fast in Europe, which has led to steep declines in farmland biodiversity. While this has differentially impacted farmland species, some of these seem to be able to use alternative man-made open habitats in forests, such as forest clear-cuts and powerline rights-of-way. We investigated the use of clear-cuts by two historically declining farmland birds, the Yellowhammer (Emberiza citrinella) and the Red-backed Shrike (Lanius collurio), to determine both local and landscape habitat characteristics of clear-cuts used for breeding. Among 101 clear-cuts visited in Scania, southern Sweden, 27% were occupied by Yellowhammers and 12% by Red-backed Shrikes. Yellowhammer occurrence in clear-cuts was positively related to local spruce cover (the planted tree species). There was also an interaction between clear-cut size and the proportion of farmland in the landscape, such that the positive effect of the proportion of farmland nearby was stronger for larger clear-cuts. Red-backed Shrike occurrence was positively related to clear-cut size and the local presence of piles of forest residues (tops and branches). The relation between occurrence and the proportion of clear-cuts in the landscape was positive for small clear-cuts and negative for larger ones. Yellowhammers and Red-backed shrikes are affected by both the local habitat structure in the clearcut and on the composition of the surrounding landscape, most likely because they use the clear-cut for nesting and the surroundings as complementary feeding habitat. To what extent clear-cuts as complementary breeding habitat to farmland may contribute to the conservation of Yellowhammers and Red-backed shrikes, as well as other farmland birds, is a promising path for future investigations.

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