Abstract
Land abandonment is a widespread phenomenon in agricultural systems, especially in former communist countries of Eastern and South-eastern Europe. Moreover, Croatia was affected by acts of war which enhanced the depopulation of marginal areas impelling further land abandonment. Agricultural landscapes in Croatia are highly parcelled with various proportions of forest habitats due to traditional smallholder farming systems. Secondary successions as a consequence of land abandonment affect farmland birds that are among the most endangered bird species in Europe. We examined bird communities along a habitat gradient in heterogeneous agricultural landscapes. We used the share of woody vegetation cover as a proxy measure for land abandonment that we classified in four classes. Our results showed no significant Shannon Wiener Index differences of bird communities along the land abandonment gradient. However, there were differences in abundances when we examined bird guilds such as farmland, forest and “other” birds separately. However, the conservation value of each of the four land abandonment classes did not show significant differences. We extracted single bird species such as the Yellowhammer (Emberiza citrinella), Red-backed Shrike (Lanius collurio), Song Thrush (Turdus philomelos) and European Robin (Erithacus rubecula) as potential indicator species for the four examined land abandonment levels. With these four species we successfully modelled the distribution of the recorded bird assemblages at the plot level along the four vegetation succession stages. We emphasized the need to develop new and integrative land use management concepts for areas affected by land abandonment in order to formulate sound conservation policy.
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Abbreviations
- AMSL:
-
Above Mean Sea Level
- CLC:
-
Corine Land Cover
- DEM:
-
Digital Elevation Model
- MRPP:
-
Multiple Response Permutation Procedure
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Mikulić, K., Radović, A., Kati, V. et al. Effects of land abandonment on bird communities of smallholder farming landscapes in post-war Croatia: implications for conservation policies. COMMUNITY ECOLOGY 15, 169–179 (2014). https://doi.org/10.1556/ComEc.15.2014.2.5
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DOI: https://doi.org/10.1556/ComEc.15.2014.2.5