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Drivers of population change in common farmland birds in Germany



Farmland bird populations in Germany are declining at a higher speed than species inhabiting other habitats. We studied potential causes for bird population changes based on data from standardised German breeding bird monitoring schemes. We related population trends to covariates describing the changes in the agricultural landscape in Germany, weather conditions during the breeding season and for some migratory species, conditions at stopover and wintering sites. Linear mixed effect models were used to analyse effect strength at species level and conclusions are drawn for the overall group of farmland bird species. The area of grassland and fallow land was shown to have the strongest positive effects and the area of maize and rapeseed the strongest negative effects on farmland bird population trends. The results obtained also indicate that despite the consistent influence of weather conditions during the breeding season, land-use changes had a stronger impact on bird populations than weather. Conditions at Sahel wintering sites did not show a consistent effect on population trends. Based on these findings the study quantitatively underpins and ranks key factors shaping farmland bird populations in Germany.


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Achtziger, R., Stickroth, H. and Zieschank, R. (2004) Nachhaltigkeitsindikator für die Artenvielfalt—ein Indikator für den Zustand von Natur und Landschaft in Deutschland. Angew Landschaftsökol. 63: 1137.
Assandri, G., Bogliani, G., Pedrini, P. and Brambilla, M. (2019) Toward the next Common Agricultural Policy reform: Determinants of avian communities in hay meadows reveal current policy’s inadequacy for biodiversity conservation in grassland ecosystems. J. Appl. Ecol. 56: 604617.
Aunins, A. and Priednieks, J. (2008) Ten years of farmland bird monitoring in Latvia: population changes 1995-2004. Revista catalana d’ornitologia 24: 5364.
Barton, K. (2016) MuMIn: Multi-Model Inference. Accessed 13.07.2017.
Bates, D., Maechler, M., Bolker, B. and Walker, S. (2015) Fitting Linear Mixed-Effects Models using lme4. J. Stat. Softw. 67: 148.
Benton, T. G., Vickery, J. A. , and Wilson, J. D. (2003) Farmland biodiversity: is habitat heterogeneity the key? Trends Ecol. Evol. 18: 182188.
Benzler, A. (2012) Measuring extent and quality of HNV farmland in Germany. Pp 507510 in Oppermann, R., Beaufoy, G. and Jones, G., eds. High Nature Value Farming in Europe. Ubstadt-Weiher: Verlag Regionalkultur.
Benzler, A., Fuchs, D. and Huenig, C. (2015) Methodik und erste Ergebnisse des Monitorings der Landwirtschaftsflächen mit hohem Naturwert in Deutschland. Natur und Landschaft 90: 309316.
BfN (Federal Agency for Nature Conservation) (2014) Grünland-Report. Alles im Grünen Bereich? Bonn-Bad Godesberg: Federal Agency for Nature Conservation. Accessed 23.08.2017.
BfN (Federal Agency for Nature Conservation) (2017) Agrar-Report 2017. Biologische Vielfalt in der Agrarlandschaft. Bonn-Bad Godesberg: Federal Agency for Nature Conservation. Accessed 23.08.2017.
BirdLife International (2018) State of the world’s birds: taking the pulse of the planet. Cambridge, UK: BirdLife International.
Boano, G. I., Bonardi, A. N. and Silvano, F. A. (2004) Nightingale Luscinia megarhynchos survival rates in relation to Sahel rainfall. Avocetta 28: 7785.
Both, C., Bouwhuis, S., Lessells, C. M. and Visser, M. E. (2006) Climate change and population declines in a long-distance migratory bird. Nature 441(7089): 8183.
Bowler, D. E., Heldbjerg, H., Fox, A. D., O’Hara, R. B. and Böhning‐Gaese, K. (2018) Disentangling the effects of multiple environmental drivers on population changes within communities. J. Anim. Ecol. 87: 10341045.
Burnham, K. P. and Anderson, D. R. (2002) Model selection and multi-model inference: A practical information-theoretic approach. 2nd edition. New York: Springer.
Burns, F., Eaton, M. A., Barlow, K. E., Beckmann, B. C., Brereton, T., Brooks, D. R., Brown, P. M., Al Fulaij, N., Gent, T., Henderson, I. and Noble, D. G. (2016) Agricultural management and climatic change are the major drivers of biodiversity change in the UK. PLoS One 11(3): p.e0151595.
Butchart, S. H., Walpole, M., Collen, B., Van Strien, A., Scharlemann, J. P., Almond, R. E., Baillie, J. E., Bomhard, B., Brown, C., Bruno, J. and Carpenter, K. E. (2010) Global biodiversity: indicators of recent declines. Science 328(5982): 11641168.
Butler, S. J., Boccaccio, L., Gregory, R. D., Vorisek, P. and Norris, K. (2010) Quantifying the impact of land-use change to European farmland bird populations. Agr. Ecosyst. Environ. 137: 348357.
BVL (Bundesamt für Verbraucherschutz und Lebensmittelsicherheit) (2014) Handbuch Pflanzenschutz-Kontrollprogramm. Bund-Länder-Programm zur Überwachung des Inverkehrbringens und der Anwendung von Pflanzenschutzmitteln nach dem Pflanzenschutzgesetz (Stand: April 2014). Braunschweig: Arbeitsgemeinschaft Pflanzenschutzmittelkontrolle (AG PMK).
Chamberlain, D. E., Fuller, R. J., Bunce, R. G. H., Duckworth, J. C. and Shrubb, M. (2000) Changes in the abundance of farmland birds in relation to the timing of agricultural intensification in England and Wales. J. Appl. Ecol. 37: 771788.
Chen, J., Franklin, J. F. and Lowe, J. S. (1996) Comparison of abiotic and structurally defined patch patterns in a hypothetical forest landscape. Conserv. Biol. 10: 854862.
Culp, L. A., Cohen, E., Scarpignato, A., Thogmartin, W. and Marra, P. (2017) Full annual cycle climate change vulnerability assessment for migratory birds. Ecosphere 8(3): e01565.
DDA and DO-G (2011) Positionspapier zur aktuellen Bestandssituation der Vögel der Agrarlandschaft. Accessed 16.06.2017.
DO-G Fachgruppe Agrarvögel (2012) Positionspapier „Ökologische Vorrangflächen“. Accessed 08.05.2018.
Donald, P. F., Green, R. E. and Heath, M. F. (2001) Agricultural intensification and the collapse of Europe’s farmland bird populations. Proc. R. Soc. Lond. Ser. B Biol. Sci. 268: 2529.
Donald, P. F., Pisano, G., Rayment, M. D. and Pain, D. J. (2002) The Common Agricultural Policy, EU enlargement and the conservation of Europe’s farmland birds. Agric. Ecosyst. Environ. 89: 167182.
Donald, P. F. and Morris, T. J. (2005) Saving the Skylark. Br. Birds 98: 570578.
Donald, P. F., Sanderson, F. J., Burfield, I. J. and van Bommel, F. P. J. (2006) Further evidence of continent-wide impacts of agricultural intensification on European farmland birds, 1990–2000. Agr. Ecosyst. Environ. 116: 189196.
Dougall, T. W. (1996) Movement and mortality of British‐ringed Skylarks Alauda arvensis. Ringing and Migration 17: 8192.
Eglington, S. M. and Pearce-Higgins, J. W. (2012) Disentangling the relative importance of changes in climate and land-use intensity in driving recent bird population trends. PloS One, 7(3): p.e30407.
Evans, K. L. (2004) The potential for interactions between predation and habitat change to cause population declines of farmland birds. Ibis 146: 113.
Federal Statistical Office (2009) Statistisches Jahrbuch 2009 für die Bundesrepublik Deutschland. Wiesbaden: Statistisches Bundesamt.
Federal Statistical Office (2011) Statistisches Jahrbuch 2009 für die Bundesrepublik Deutschland mit »Internationalen Übersichten«. Wiesbaden: Statistisches Bundesamt.
Flade, M. (2012) Von der Energiewende zum Biodiversitäts-Desaster – zur Lage des Vogelschutzes in Deutschland. Vogelwelt 133: 149158.
Flade, M. and Schwarz, J. (2004) Ergebnisse des DDA-Monitoringprogramms, Teil II: Bestandsentwicklung von Waldvögeln in Deutschland. Vogelwelt 125: 177213.
Gamero, A., Brotons, L., Brunner, A., Foppen, R., Fornasari, L., Gregory, R. D., Herrando, S., Hořák, D., Jiguet, F., Kmecl, P., Lehikoinen, A., Lindström, Å., Paquet, J., Reif, J., Sirkiä, P. M., Škorpilová, J., van Strien, A., Szép, T., Telenský, T., Teufelbauer, N., Trautmann, S., van Turnhout, C. A. M., Vermouzek, Z., Vikstrøm, T.and Voříšek, P. (2017) Tracking progress toward EU biodiversity strategy targets: EU policy effects in preserving its common farmland birds. Conserv. Lett. doi:10.1111/conl.12292
Gil-Tena, A., De Cáceres, M., Ernoult, A., Butet, A., Brotons, L. and Burel, F. (2015) Agricultural landscape composition as a driver of farmland bird diversity in Brittany (NW France). Agric. Ecosyst. Environ. 205: 7989.
Gregory, R. D., Van Strien, A., Vorisek, P., Meyling, A. W. G., Noble, D. G., Foppen, R. P. and Gibbons, D. W. (2005) Developing indicators for European birds. Philos. Trans. R. Soc. Lond., B, Biol. Sci. 360(1454): 269288.
Gregory, R. D., Skorpilova, J., Vorisek, P. and Butler, S. (2019) An analysis of trends, uncertainty and species selection shows contrasting trends of widespread forest and farmland birds in Europe. Ecol. Indic. 103: 676687.
Grueber, C. E., Nakagawa, S., Laws, R. J. and Jamieson, I. G. (2011) Multimodel inference in ecology and evolution: Challenges and solutions. J. Evol. Biol. 24: 699711.
Grüneberg, C., Bauer, H.-G., Haupt, H., Hüppop, O., Ryslavy, T. and Südbeck, P. (2015) Rote Liste der Brutvögel Deutschlands. 5. Fassung, 30. November 2015. Ber. Vogelschutz 52: 1967.
Grüneberg, C., Dröschmeister, R., Fuchs, D., Frederking, W., Gerlach, B., Hauswirth, M., Karthäuser, J., Schuster, B., Sudfeldt, C., Trautmann, S. and Wahl, J. (2017) Vogelschutzbericht 2013: Methoden, Organisation und Ergebnisse. Naturschutz und Biologische Vielfalt 157. Bonn-Bad Godesberg: Federal Agency for Nature Conservation.
Hallmann, C. A., Foppen, R. P., van Turnhout, C. A., de Kroon, H. and Jongejans, E. (2014) Declines in insectivorous birds are associated with high neonicotinoid concentrations. Nature 511(7509): 341343.
Heldbjerg, H., Sunde, P. and Fox, A. D. (2018) Continuous population declines for specialist farmland birds 1987-2014 in Denmark indicates no halt in biodiversity loss in agricultural habitats. Bird Conserv. Internatn. 28: 278291.
Henderson, I. G. and Evans, A. D. (2000) Responses of farmland birds to set-aside and its management. Pp. 6976 in Aebischer, N. J., Evans, A. D., Grice, P. V. and Vickery, J. A., eds. Ecology and conservation of lowland farmland birds. Hertfordshire, UK: British Ornithologists’ Union.
Hendriks, K., Stobbelaar, D. J. and Van Mansvelt, J. D. (2000) The appearance of agriculture: An assessment of the quality of landscape of both organic and conventional horticultural farms in West Friesland. Agric. Ecosyst. Environ. 77: 157175.
Hirschfeld, A. and Attard, G. (2017) Vogeljagd in Europa – Analyse von Abschusszahlen und Auswirkungen der Jagd auf den Erhalt bedrohter Arten. Ber. Vogelschutz 53/54: 1542.
Jaeger, B. (2016) r2glmm: Computes R Squared for Mixed (Multilevel) Models. Accessed 09.05.2017.
Jerrentrup, J. S., Dauber, J., Strohbach, M. W., Mecke, S., Mitschke, A., Ludwig, J. and Klimek, S. (2017) Impact of recent changes in agricultural land use on farmland bird trends. Agric. Ecosyst. Environ. 239: 334341.
Kleijn, D. and van Zuijlen, G. J. (2004) The conservation effects of meadow bird agreements on farmland in Zeeland, The Netherlands, in the period 1989–1995. Biol. Conserv. 117: 443451.
Lemoine, N. and Bohning-Gaese, K. (2003) Potential impact of global climate change on species richness of long-distance migrants. Conserv. Biol. 17: 577586.
Machado, S., Bynum, E. D., Archer, T. L., Lascano, R. J., Wilson, L. T., Bordovsky, J., Segarra, E., Bronson, K., Nesmith, D. M. and Xu, W. (2000) Spatial and temporal variability of corn grain yield: Site-specific relationships of biotic and abiotic factors. Precis. Agric. 2: 359376.
McCulloch, M. N., Tucker, G. M. and Baillie, S. R. (1992) The hunting of migratory birds in Europe: a ringing recovery analysis. Ibis 134(s1): 5565.
Milsom, T. P., Langton, S. D., Parkin, W. K., Peel, S., Bishop, J. D., Hart, J. D. and Moore, N. P. (2000) Habitat models of bird species’ distribution: an aid to the management of coastal grazing marshes. J. Appl. Ecol. 37: 706727.
Mitschke, A., Sudfeldt, C., Heidrich-Riske, H. and Dröschmeister, R. (2005) Brutvogelmonitoring in der Normallandschaft Deutschlands – Untersuchungsgebiete, Erfassungsmethode und erste Ergebnisse. Vogelwelt 126: 127140.
Morrison, C. A., Robinson, R. A., Clark, J. A., Risely, K. and Gill, J. A. (2013) Recent population declines in Afro‐Palaearctic migratory birds: the influence of breeding and non‐breeding seasons. Divers. Distrib. 19: 10511058.
NABU (Nature and Biodiversity Conservation Union) (2009) NABU-Position Grünlandschutz. Accessed 23.08.2017.
Nakagawa, S. and Schielzeth, H. (2013) A general and simple method for obtaining R2 from generalized linear mixed-effects models. Methods Ecol. Evol. 4: 133142.
Newton, I. (2004) The recent declines of farmland bird populations in Britain: an appraisal of causal factors and conservation actions. Ibis 146: 579600.
Nitsch, H., Osterburg, B., Roggendorf, W. and Laggner, B. (2012) Cross compliance and the protection of grassland–Illustrative analyses of land use transitions between permanent grassland and arable land in German regions. Land Use Policy 29: 440448.
Oppermann, R., Kasperczyk, N., Matzdorf, B., Reuter, M., Meyer, C., Luick, R., Stein, S., Ameskamp, K., Gelhausen, J. and Bleil, R. (2013) Reform der Gemeinsamen Agrarpolitik (GAP) 2013 und Erreichung der Biodiversitäts- und Umweltziele. Naturschutz und Biologische Vielfalt 135. Bonn-Bad Godesberg: Federal Agency for Nature Conservation.
Oppermann, R., Fried, A.Lepp, N., Lepp, T. and Lakner, S. (2016) Fit, fair und nachhaltig. Vorschläge für eine neue EU-Agrarpolitik. Eine Studie im Auftrag des NABU Bundesverbands. Mannheim, Göttingen: Institut für Agrarökologie und Biodiversität, Ingenieurbüro für Naturschutz und Agrarökonomie Accessed 12.08.2017.
Osterburg, B., Nitsch, H., Laggner, B. and Roggendorf, W. (2009) Auswertung von Daten des Integrierten Verwaltungs- und Kontrollsystems zur Abschätzung der EU-Agrarreform auf Umwelt und Landschaft: Bericht für das F+E-Vorhaben ’Naturschutzfachliche Bewertung der GAP-Effizienzsteigerung durch Nutzung bestehender Datenbestände’, gefördert durch das Bundesamt für Naturschutz (BfN) mit Mitteln des Bundesministeriums für Umwelt, Naturschutz und Reaktorsicherheit, Arbeitsberichte aus der vTI-Agrarökonomie, No. 07/2009.
Pannekoek, J. and van Strien, A. (2005) TRIM 3 Manual (Trends and indices for monitoring data). Accessed 07.04.2017.
Pe’er, G. , Dicks, L. V., Visconti, P., Arlettaz, R., Baldi, A., Benton, T. G., Collins, S., Dieterich, M., Gregory, R. D., Hartig, F., Henle, K., Hobson, P. R., Kleijn, D., Neumann, R. K., Robijns, T., Schmidt, J., Shwartz, A., Sutherland, W. J., Turbe, A. and Scott, A. V. (2014) EU agricultural reform fails on biodiversity. Science 344(6188): 10901092.
Przybylo, R., Sheldon, B. C. and Merilä, J. (2000) Climatic effects on breeding and morphology: evidence for phenotypic plasticity. J. Anim. Ecol. 69: 395403.
R Core Team (2017) R: A language and environment for statistical computing. Vienna, Austria: R Foundation for Statistical Computing. Accessed 03.02.2016.
Reif, J. (2013) Long-term trends in bird populations: a review of patterns and potential drivers in North America and Europe. Acta Ornithol. 48: 116.
Reif, J. and Hanzelka, J. (2016) Grassland winners and arable land losers: The effects of post-totalitarian land use changes on long-term population trends of farmland birds. Agric. Ecosyst. Environ. 232: 208217.
Reif, J. and Vermouzek, Z. (2018) Collapse of farmland bird populations in an Eastern European country following ist EU accession. Conserv. Lett. e12586.
Rösler, S. and Weins, C. (1996) Aktuelle Entwicklungen in der Landwirtschaftspolitik und ihre Auswirkungen auf die Vogelwelt. Vogelwelt 117: 169185.
Saino, N., Ambrosini, R., Rubolini, D., von Hardenberg, J., Provenzale, A., Hüppop, K., Hüppop, O., Lehikoinen, A., Lehikoinen, E., Rainio, K. and Romano, M. (2011) Climate warming, ecological mismatch at arrival and population decline in migratory birds. Proc. R. Soc. Lond. Ser. B Biol. Sci. 278(1707): 835842.
Sanderson, F. J., Donald, P. F., Pain, D. J., Burfield, I. J. and Van Bommel, F. P. (2006) Long-term population declines in Afro-Palearctic migrant birds. Biol. Conserv. 131: 93105.
Sanderson, F. J., Kloch, A., Sachanowicz, K. and Donald, P. F. (2009) Predicting the effects of agricultural change on farmland bird populations in Poland. Agric. Ecosyst. Environ. 129: 3742.
Sauerbrei, R., Ekschmitt, K., Wolters, V. and Gottschalk, T. K. (2014) Increased energy maize production reduces farmland bird diversity. Gcb Bioenergy 6: 265274.
Schielzeth, H. (2010) Simple means to improve the interpretability of regression coefficients. Methods Ecol. Evol. 1: 103113.
Schwarz, J. and Flade, M. (2000) Ergebnisse des DDA-Monitoringprogramms. Teil I: Bestandsänderungen von Vogelarten der Siedlungen seit 1989. Vogelwelt 121: 87106.
Şekercioğlu, Ç. H., Daily, G. C. and Ehrlich, P. R. (2004) Ecosystem consequences of bird declines. Proc. Natl. Acad. Sci. U.S.A. 101: 1804218047.
Stephens, P. A., Mason, L. R., Green, R. E., Gregory, R. D., Sauer, J. R., Alison, J. and Willis, S. G. (2016) Consistent response of bird populations to climate change on two continents. Science 352: 8487.
Strebel, G., Jacot, A., Horch, P. and Spaar, R. (2015) Effects of grassland intensification on Whinchats Saxicola rubetra and implications for conservation in upland habitats. Ibis 157: 250259.
Sudfeldt, C., Dröschmeister, R., Flade, M., Grüneberg, C., Mitschke, A., Schwarz, J. and Wahl, J. (2009) Vögel in Deutschland – 2009. Münster: DDA, BfN, LAG VSW.
Sudfeldt, C., Dröschmeister, R., Wahl, J., Berlin, K., Gottschalk, T., Grüneberg, C., Mitschke, A. and Trautmann, S. (2012) Vogelmonitoring in Deutschland. Programme und Anwendungen. Naturschutz und Biologische Vielfalt 119. Bonn-Bad Godesberg: Federal Agency for Nature Conservation.
Sudfeldt, C., Dröschmeister, R., Frederking, W., Gedeon, K., Gerlach, B., Grüneberg, C., Karthäuser, J., Langgemach, T., Schuster, B., Trautmann, S. and Wahl, J. (2013) Vögel in Deutschland – 2013. Münster: DDA, BfN, LAG VSW.
Szep, T. (1995) Relationship between west African rainfall and the survival of central European Sand Martins Riparia riparia. Ibis 137: 162168.
Traba, J. and Morales, M. B. (2019) The decline of farmland birds in Spain is strongly associated to the loss of fallowland. Sci. Rep. 9: 9473.
Tscharntke, T., Klein, A. M., Kruess, A., Steffan-Dewenter, I. and Thies, C. (2005) Landscapeperspectives on agricultural intensification and biodiversity – ecosystem service management. Ecol. Lett. 8: 857874.
Verhulst, J., Baldi, A. and Kleijn, D. (2004) Relationship between land-use intensity andspecies richness and abundance of birds in Hungary. Agric. Ecosyst. Environ. 104: 465473.
Wahl, J., Dröschmeister, R., Gerlach, B., Grüneberg, C., Langgemach, T., Trautmann, S. and Sudfeldt, C. (2015) Vögel in Deutschland – 2014. Münster: DDA, BfN, LAG VSW.
Wahl, J., König, C., Grüneberg, C. and Trautmann, S. (2014) Entwicklung, Charakterisierung und Abstimmung von ökologischen Gruppen von Vogelarten. Unveröffentlichter Abschlussbericht zum gleichnamigen Projekt im Auftrag des BfN. Münster: Dachverband Deutscher Avifaunisten.
Yalden, D. W. and Pearce-Higgins, J. W. (1997) Density-dependence and winter weather as factors affecting the size of a population of Golden Plovers Pluvialis apricaria. Bird Study 44: 227234.
Yong, W. and Moore, F. R. (1997) Spring stopover of intercontinental migratory thrushes along the northern coast of the Gulf of Mexico. The Auk 114: 263278.
Zuur, A. F., Ieno, E. N., Walker, N. J., Saveliev, A. A. and Smith, G. M. (2009) Mixed effects models and extensions in ecology with R. New York: Springer.
Zuur, A. F., Ieno, E. N. and Elphick, C. S. (2010) A protocol for data exploration to avoid common statistical problems. Methods Ecol. Evol. 1: 314.
Zwarts, L., Bijlsma, R. G., van der Kamp, J. and Wymenga, E. (2012) Living on the edge. Accessed 16.10.2017.


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Drivers of population change in common farmland birds in Germany



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