Abstract
We studied the effects of different land uses on conservation value and bird diversity in a Northern Adriatic karstic landscape. Our research area was situated in SW Slovenia and was covered with dry pastures and meadows in different stages of forest sucession and with different grazing intensities. We surveyed birds in 2007 and 2012 using the line transect method, with 50.4 km being covered each year. In the analysis we divided the survey transects into 200 m tiles which were used as statistical units in the analysis. We then modelled conservation value, bird diversity and bird abundances with different land uses; we used boosted regression trees as a modelling tool. Canonical correspondence analysis showed that a distinct group of birds occurred on tiles with higher grazing intensity. The species in this group also had significantly higher abundances in 2012 than in 2007. Forest succession was the most important predictor of SPA conservation value (Special Protected Areas according to the Directive on the conservation of wild birds of the European Union) and had negative effect on it; grazing intensity had a unimodal positive influence on conservation value and was most beneficial at low intensity. The model for the European conservation value showed a rather low predictive power. Farmland bird diversity was also negatively affected by forest and positively by grazing intensity. For the four Natura 2000 species—protected species in the SPA Kras (Woodlark Lullula arborea, Red-backed Shrike Lanius collurio, Corn Bunting Emberiza calandra and Skylark Alauda arvensis), forest cover also had a negative effect. Grazing intensity had a positive effect for Woodlark, Red-backed Shrike and Skylark. The highest SPA conservation value and farmland bird diversity could therefore be achieved in a landscape with as low a forest succession as possible and grazing present but at low intensity. We recommend inclusion of appropriate measures in the agri-environment schemes (CAP pillar II) of Rural Development Programmes of the countries in the region with similar areas. The payments should be sufficiently stimulative to reopen the large areas subject to forest encroachment in the Northern Adriatic hinterland.
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References
Batáry P, Dicks LV, Kleijn D, Sutherland WJ (2015) The role of agri-environment schemes in conservation and environmental management: European agri-environment schemes. Conserv Biol 29:1006–1016. https://doi.org/10.1111/cobi.12536
Bibby CJ, Burgess ND, Hill DA, Mustoe S (2000) Bird census techniques, 2nd edn. Academic Press, London
BirdLife International (2017) European birds of conservation concern: populations, trends and national responsibilities. BirdLife International, Cambridge
Bivand R, Piras G (2015) Comparing implementations of estimation methods for spatial econometrics. J Stat Softw 63:1–36
Bjørnstad ON (2016) R package ncf: spatial nonparametric covariance functions. https://cran.r-project.org/web/packages/ncf/ncf.pdf. Accessed 1 Oct 2016
Brambilla M, Rubolini D, Guidali F (2007) Between land abandonment and agricultural intensification: habitat preferences of Red-backed Shrikes Lanius collurio in low-intensity farming conditions. Bird Study 54:160–167. https://doi.org/10.1080/00063650709461471
Buston PM, Elith J (2011) Determinants of reproductive success in dominant pairs of clownfish: a boosted regression tree analysis. J Anim Ecol 80:528–538. https://doi.org/10.1111/j.1365-2656.2011.01803.x
Campedelli T, Londi G, Miniati G, Cutini S, Florenzano GT (2016) Recovering mountain Mediterranean grasslands for breeding birds: ecology and population status shape species responses to management. Biodivers Conserv 25:1695–1710. https://doi.org/10.1007/s10531-016-1150-6
Catry FX, Moreira F, Deus E, Silva JS, Águas A (2015) Assessing the extent and the environmental drivers of Eucalyptus globulus wildling establishment in Portugal: results from a countrywide survey. Biol Invasions 17:3163–3181. https://doi.org/10.1007/s10530-015-0943-y
Ceresa F, Bogliani G, Pedrini P, Brambilla M (2012) The importance of key marginal habitat features for birds in farmland: an assessment of habitat preferences of Red-backed Shrikes Lanius collurio in the Italian Alps. Bird Study 59:327–334. https://doi.org/10.1080/00063657.2012.676623
Chauchard S, Carcaillet C, Guibal F (2007) Patterns of land-use abandonment control tree-recruitment and forest dynamics in Mediterranean mountains. Ecosystems 10:936–948. https://doi.org/10.1007/s10021-007-9065-4
Core Team R (2016) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna
Cramp S, Perrins CM, Brooks DJ (1994) Handbook of the Birds of Europe, the Middle East and North Africa. The Birds of the Western Palearctic. Volume IX Buntings and New World Warblers. Oxford University Press, Oxford
Crase B, Liedloff AC, Wintle BA (2012) A new method for dealing with residual spatial autocorrelation in species distribution models. Ecography 35:879–888. https://doi.org/10.1111/j.1600-0587.2011.07138.x
Directive 2009/147/EC of the European Parliament and of the Council of 30 November 2009. http://www.eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:020:0007:0025:EN:PDF. Accessed 26 Sept 2017
Donald PF, Evans AD, Buckingham DL, Muirhead L, Wilson JD (2001a) Factors affecting the territory distribution of Skylarks Alauda arvensis breeding on lowland farmland. Bird Study 48:271–278. https://doi.org/10.1080/00063650109461227
Donald PF, Green RE, Heath MF (2001b) Agricultural intensification and the collapse of Europe’s farmland bird populations. Proc R Soc B 268:25–29. https://doi.org/10.1098/rspb.2000.1325
Donald PF, Pisano G, Rayment MD, Pain DJ (2002) The common agricultural policy, EU enlargement and the conservation of Europe’s farmland birds. Agric Ecosyst Environ 89:167–182. https://doi.org/10.1016/S0167-8809(01)00244-4
Dyulgerova S, Gramatikov M, Pedashenko H, Vassilev K, Kati V, Nikolov SC (2015) Farmland birds and agricultural land abandonment: evidences from Bulgaria. Acta Zool Bulgar 67:223–234
Eler K, Čop J, Vidrih M (2008) Sustainable management of karst pastures of the Primorska region of Slovenia in the future. In: New challenges in field crop production 2008. Proceedings of symposium, Rogaška Slatina, 4–5 Dec 2008 (ed. Tajnšek A). Slovenian society for agronomy. (In Slovene)
Elith J, Leathwick JR, Hastie T (2008) A working guide to boosted regression trees. J Anim Ecol 77:802–813. https://doi.org/10.1111/j.1365-2656.2008.01390.x
ESRI (2014): ArcGIS 10.2.2 for Desktop. Esri Inc
Eyre TJ, Maron M, Mathieson MT, Haseler M (2009) Impacts of grazing, selective logging and hyper-aggressors on diurnal bird fauna in intact forest landscapes of the Brigalow Belt, Queensland. Austral Ecol 34:705–716. https://doi.org/10.1111/j.1442-9993.2009.01979.x
Fay MP (2010) Two-sided exact tests and matching confidence intervals for discrete data. R J 2:53–58
Herrando S, Brotons L, Anton M, Páramo F, Villero D, Titeux N, Quesada J, Stefanescu C (2016) Assessing impacts of land abandonment on Mediterranean biodiversity using indicators based on bird and butterfly monitoring data. Environ Conserv 43:69–78. https://doi.org/10.1017/S0376892915000260
Holechek JL, Galt D (2000) Grazing intensity guidelines. Rangelands 22(3):11–14
Ivajnšič D, Škornik S, Kaligarič M (2013) Land use changes in the area of Movraški Kras and adjacent flysch areas between 1830 and 2008. J Geogr 8:83–96 (In Slovene)
Jerrentrup JS, Wrage-Mönnig N, Röver K-U, Isselstein J (2014) Grazing intensity affects insect diversity via sward structure and heterogeneity in a long-term experiment. J Appl Ecol 51:968–977. https://doi.org/10.1111/1365-2664.12244
Kaligarič M, Ivajnšič D (2014) Vanishing landscape of the “classic” Karst: changed landscape identity and projections for the future. Landsc Urban Plan 132:148–158. https://doi.org/10.1016/j.landurbplan.2014.09.004
Kaligarič M, Culiberg M, Kramberger B (2006) Recent vegetation history of the North Adriatic grasslands: expansion and decay of an anthropogenic habitat. Folia Geobot 41:241–258. https://doi.org/10.1007/BF02904940
Kmecl P, Figelj J (2016) Monitoring of common birds for the calculation of the Slovenian farmland bird index—partial report for 2016. DOPPS, Ljubljana (In Slovene)
Kmecl P, Figelj J, Tout P (2014) The birds of dry meadows above the Karst edge. In: Bužan EV, Pallavicini A (eds) Biodiversity and conservation of Karst ecosystems. University of Primorska, Koper, pp 46–63
Koskimies P, Väisänen RA (1988) Monitoring bird populations. A manual of methods applied in Finland. Zoological Museum, Finnish Museum of Natural History, University of Helsinki, Helsinki
Kruess A, Tscharntke T (2002) Grazing intensity and the diversity of grasshoppers, butterflies, and trap-nesting bees and wasps. Conserv Biol 16:1570–1580. https://doi.org/10.1046/j.1523-1739.2002.01334.x
Ljubičić I, Britvec M, Jelaska SD, Husnjak S (2014) Plant diversity and chemical soil composition of rocky pastures in relation to the sheep grazing intensity on the northern Adriatic islands (Croatia). Acta Bot Croat 73:419–435. https://doi.org/10.2478/botcro-2014-0003
McCracken DI, Tallowin JR (2004) Swards and structure: the interactions between farming practices and bird food resources in lowland grasslands. Ibis 146:108–114. https://doi.org/10.1111/j.1474-919X.2004.00360.x
McGarigal K, Cushman SA, Ene E (2012) FRAGSTATS v4: spatial pattern analysis program for categorical and continuous maps. Computer software program produced by the authors at the University of Massachusetts, Amherst
Mikulić K, Radović A, Kati V, Jelaska S, Tepić N (2014) Effects of land abandonment on bird communities of smallholder farming landscapes in post-war Croatia: implications for conservation policies. Community Ecol 15:169–179. https://doi.org/10.1556/ComEc.15.2014.2.5
MKGP (2013) The interpretation key. The detailed description of the survey methodology of actual land and forest use. Version 6.0 (8.10.2013). Republic of Slovenia, Ministry of Agriculture, Forestry and Food, Ljubljana. (In Slovene) http://www.gis.si/media/javna_narocila/20160324_obnova_dejanske_rabe/RABA_IntKljuc_20131009.pdf. Accessed 1 Oct 2016
Nikolov SC (2010) Effects of land abandonment and changing habitat structure on avian assemblages in upland pastures of Bulgaria. Bird Conserv Int 20:200–213. https://doi.org/10.1017/S0959270909990244
OG RS (2004): Decree on special protection areas (Natura 2000 areas). Official Gazette of the Republic of Slovenia no. 49/2004 http://www.pisrs.si/Pis.web/pregledPredpisa?id=URED283. Accessed 31 Dec 2017 (In Slovene)
Oksanen J, Blanchet FG, Kindt R, Legendre P, Minchin PR, O’Hara RB, Simpson GL, Solymos P, Stevens MHH, Wagner H (2016) R package vegan: community ecology package. https://cran.r-project.org/web/packages/vegan/vegan.pdf. Accessed 1 Oct 2016
Perko D, Orožen Adamič M (1998) Slovenia. Lands and people. Mladinska knjiga, Ljubljana (In Slovene)
Pons P, Lambert B, Rigolot E, Prodon R (2003) The effects of grassland management using fire on habitat occupancy and conservation of birds in a mosaic landscape. Biodivers Conserv 12:1843–1860. https://doi.org/10.1023/A:1024191814560
Preiss E, Martin J-L, Debussche M (1997) Rural depopulation and recent landscape changes in a Mediterranean region: consequences to the breeding avifauna. Landsc Ecol 12:51–61. https://doi.org/10.1007/BF02698207
Reino L, Porto M, Morgado R, Moreira F, Fabião A, Santana J, Delgado A, Gordinho L, Cal J, Beja P (2010) Effects of changed grazing regimes and habitat fragmentation on Mediterranean grassland birds. Agric Ecosyst Environ 138:27–34. https://doi.org/10.1016/j.agee.2010.03.013
Ridgeway G (2007) R package gbm: Generalized Boosted Models. https://cran.r-project.org/web/packages/gbm/gbm.pdf. Accessed 1 Oct 2016
Serra P, Pons X, Saurí D (2008) Land-cover and land-use change in a Mediterranean landscape: a spatial analysis of driving forces integrating biophysical and human factors. Appl Geogr 28:189–209. https://doi.org/10.1016/j.apgeog.2008.02.001
Sidiropoulou A, Karatassiou M, Galidaki G, Sklavou P (2015) Landscape pattern changes in response to transhumance abandonment on mountain Vermio (North Greece). Sustainability 7:15652–15673. https://doi.org/10.3390/su71115652
Sirami C, Brotons L, Martin J-L (2007) Vegetation and songbird response to land abandonment: from landscape to census plot. Divers Distrib 13:42–52. https://doi.org/10.1111/j.1472-4642.2006.00297.x
Sirami C, Nespoulous A, Cheylan J-P, Marty P, Hvenegaard GT, Geniez P, Schatz B, Martin J-L (2010) Long-term anthropogenic and ecological dynamics of a Mediterranean landscape: impacts on multiple taxa. Landsc Urban Plan 96:214–223. https://doi.org/10.1016/j.landurbplan.2010.03.007
Sirami C, Brotons L, Martin J-L (2011) Woodlarks Lullula arborea and landscape heterogeneity created by land abandonment. Bird Study 58:99–106. https://doi.org/10.1080/00063657.2010.532861
Škornik S, Vidrih M, Kaligarič M (2010) The effect of grazing pressure on species richness, composition and productivity in North Adriatic Karst pastures. Plant Biosyst 144:355–364. https://doi.org/10.1080/11263501003750250
Söderström B, Pärt T, Linnarsson E (2001) Grazing effects on between-year variation of farmland bird communities. Ecol Appl 11:1141–1150
Ter Braak CJF, Verdonschot PFM (1995) Canonical correspondence analysis and related multivariate methods in aquatic ecology. Aquat Sci 57:255–289. https://doi.org/10.1007/BF00877430
Vassilev K, Pedashenko H, Nikolov SC, Apostolova I, Dengler J (2011) Effect of land abandonment on the vegetation of upland semi-natural grasslands in the Western Balkan Mts., Bulgaria. Plant Biosyst 145(3):654–665. https://doi.org/10.1080/11263504.2011.601337
Wagner HH (2004) Direct multi-scale ordination with canonical correspondence analysis. Ecology 85:342–351. https://doi.org/10.1890/02-0738
Zakkak S, Kakalis E, Radović A, Halley JM, Kati V (2014) The impact of forest encroachment after agricultural land abandonment on passerine bird communities: the case of Greece. J Nat Conserv 22:157–165. https://doi.org/10.1016/j.jnc.2013.11.001
Zakkak S, Radović A, Nikolov SC, Shumka S, Kakalis L, Kati V (2015) Assessing the effect of agricultural land abandonment on bird communities in southern-eastern Europe. J Environ Manage 164:171–179. https://doi.org/10.1016/j.jenvman.2015.09.005
Zorn M, Kumer P, Ferk M (2015) From forest to forest or where is the bare rocky Karst? Kronika 63:561 (In Slovene)
Zuur AF, Ieno EN, Walker NJ, Saveliev AA, Smith GM (2009) Mixed effects models and extensions in ecology with R. Springer, New York
Acknowledgements
The fieldwork was funded by the European programme of cross-border collaboration (Slovenia-Italy 2000–2006, project Natura Primorske and Slovenia-Italy 2007–2013, project BioDiNet). We would like to thank Paul Tout for the language correction and useful suggestions on the text, Andrej Figelj, Jernej Figelj, Tomaž Mihelič and Borut Rubinić for their help with the field work and Jane Elith for the help with boosted regression trees.
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Kmecl, P., Denac, K. The effects of forest succession and grazing intensity on bird diversity and the conservation value of a Northern Adriatic karstic landscape. Biodivers Conserv 27, 2003–2020 (2018). https://doi.org/10.1007/s10531-018-1521-2
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DOI: https://doi.org/10.1007/s10531-018-1521-2