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Comparing conventional and organic olive groves in central Greece: plant and bird diversity and abundance

Published online by Cambridge University Press:  01 April 2011

Alexandra Solomou  and
Athanassios Sfougaris
Alexandra Solomou
Affiliation:
Laboratory of Ecosystem and Biodiversity Management, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Fytokou Str., N. Ionia, 384 46, Volos, Greece.
Athanassios Sfougaris*
Affiliation:
Laboratory of Ecosystem and Biodiversity Management, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Fytokou Str., N. Ionia, 384 46, Volos, Greece.
*
*Corresponding author: [email protected]
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Abstract

The present study was conducted in Magnesia Prefecture, central Greece, during the period May–June 2007. It aimed at the comparison between conventional and certified organic olive groves with regard to olive and olive oil production, diversity of plants (herbaceous and woody) and diversity and abundance of avifauna. Correlations between variables within herbaceous plants (linear regression) and woody plants (Principal Component Analysis), and the role of integration time of olive groves to the organic system were investigated. Also, finding easily measurable parameters indicating high bird diversity levels within organic and conventional management systems was a main target of the study. According to our findings, neither edible olive yield nor olive oil yield showed significant differences between conventional and certified organic olive groves. There is an increasing trend for alpha and beta diversity of herbaceous plant species, woody plant beta diversity, density and cover of woody plants, and density of breeding birds in certified organic olive groves (10 years) in comparison with conventional ones. The effect of time since the adoption of organic procedures is very important and produces benefits for the biodiversity. In the total olive groves 15 insectivorous, six granivorous and three insectivorous/granivorous birds species were recorded. Nine bird species distinguished by Ward's hierarchical clustering were identified as typical (indicator value, IndVal>50%) of specific farming systems. Among them, the Eurasian jay, associated with the 10-year certified organic olive groves, and the common cuckoo, Orphean warbler and Red-backed shrike, associated with the 6-year certified organic olive groves, should be regarded as characteristic species (IndVal>70%). Conclusively, organic farming favors some aspects of diversity of herbaceous and woody plants of olive grove ecosystems. On the contrary, similar effects on breeding bird diversity and density were not clearly recorded. However, breeding bird density proved a good indicator of their richness.

Keywords

biodiversityolive grovesconventionalorganicbioindicators
Type
Research Papers
Information
Renewable Agriculture and Food Systems , Volume 26 , Issue 4 , December 2011 , pp. 297 - 316
Copyright
Copyright © Cambridge University Press 2011

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References

1Tzouvelekas, V., Pantzios, C.J., and Fotopoulos, C. 2001. Technical efficiency of alternative farming systems: the case of Greek organic and conventional olive-growing farms. Food Policy 26:549–569.CrossRefGoogle Scholar
2Tous, J. and Ferguson, L. 1996. Mediterranean fruits. In Janick, J. (ed.). Progress in New Crops. ASHS Press, Arlington, VAP. p. 416–430.Google Scholar
3Loumou, A. and Giourga, C. 2003. Olive groves: the life and identity of the Mediterranean. Agriculture and Human Values 20:87–95.CrossRefGoogle Scholar
4Allen, H.D., Randall, R.E., Amable, G.S., and Devereux, B.J. 2006. The impact of changing olive cultivation practices on the ground flora of olive groves in the Messara and Psiloritis regions, Crete, Greece. Land Degradation and Development 17:249–273.CrossRefGoogle Scholar
5Graaff, J., Zuazo, V.H.D., Jones, N., and Fleskens, L. 2008. Olive production systems on sloping land: prospects and scenarios. Journal of Environmental Management 89:129–139.CrossRefGoogle ScholarPubMed
6Fleskens, L., Duarte, F., and Eicher, I. 2009. A conceptual framework for the assessment of multiple functions of agro-ecosystems: a case study of Tras-os-Montes olive groves. Journal of Rural Studies 25:141–155.CrossRefGoogle Scholar
7Cirio, U. 1997. Agrichemicals and environmental impact in olive farming. Olivae 65:32–39.Google Scholar
8Parra-López, C. and Calatrava-Requena, J. 2005. Factors related to the adoption of organic farming in Spanish olive orchards. Spanish Journal of Agriculture Research 1:5–16.CrossRefGoogle Scholar
9Kampoyrakis, E. 2004. Notes of Organic Agriculture. Publications Technological Educational Institute, Heraklion, Greece. p. 6, 141–142.Google Scholar
10Hole, D.J., Perkins, A.J., Wilson, J.D., Alexander, I.H., Erice, P.V., and Evans, A.D. 2004. Does organic farming benefit biodiversity? Biological Conversation 122:113–130.Google Scholar
11The Soil Association 2000. The biodiversity benefits of organic farming. Available at Web site http://www.soilassociation.org ( accessed March 21, 2011).Google Scholar
12Hyvönen, T.E., Ketoja, J., Salonen, J.H., and Tiainen, J. 2003. Weed species diversity and community composition in organic and conventional cropping of spring cereals. Agriculture, Ecosystems and Environment 97:131–149.CrossRefGoogle Scholar
13Ministry of Rural Development and Food. Available at Web site http://www.minagric.gr(accessed March 21, 2011).Google Scholar
14European Commision, Eurostat. Available at http://epp.eurostat.ec.europa.eu/cache/ITY_PUBLIC/5-01032010-BP/EN/5-01032010-BP-EN.PDFGoogle Scholar
15FiBL Statistics on Organic Farming in Europe. Available at Web site http://www.organic-europe.net/europe_eu/statistics-fibl-survey.asp(accessed March 21, 2011).Google Scholar
16Ducey, J., Rauscher, J., Wiederspan, C., Miller, L., Koheler, A., and Mazour, D. 1980. A Biological Comparison of Organic and Chemical Farming. University of Nebraska, Lincoln.Google Scholar
17Frieben, B. and Kopke, U. 1995. Effects of farming systems on biodiversity. In Isart, J. and Llerena, J.J. (eds.). Proceedings of the First ENOF Workshop – Biodiversity and Land Use: The Role of Organic Farming, Multitext, Barcelona. p. 11–21.Google Scholar
18McLaughlin, A. and Mineau, P. 1995. The impact of agricultural practices on biodiversity. Agriculture, Ecosystems and Environment 55:201–212.CrossRefGoogle Scholar
19Gardner, S.M. and Brown, R.W. (eds). 1998. Review of the Comparative Effects of Organic Farming on Biodiversity. MAFF, London.Google Scholar
20EU. 2002. Organic Farming in the EU: Facts and Figures. Available at Web site http://europa.eu.int/comm/agriculture/qual/organic/facts_en.pdfGoogle Scholar
21Benton, T.G., Vickery, J.A., and Wilson, J.D. 2003. Farmland biodiversity is habitat heterogeneity the key? Trends in Ecology and Evolution 18:182–188.CrossRefGoogle Scholar
22Hodgson, J.A., Kunin, W.E., Thomas, C.D., Benton, T.G., and Gabrie, D. 2010. Comparing organic farming and land sparing: optimizing yield and butterfly populations at a landscape scale. Ecology Letters 13:1358–1367.CrossRefGoogle Scholar
23Bengtsson, J., Ahnström, J., and Weibull, A.C. 2005. The effects of organic agriculture on biodiversity and abundance: a meta-analysis. Journal of Applied Ecology 42:261–269.CrossRefGoogle Scholar
24Holzschuh, A., Dewenter, I.S., and Tscharntke, T. 2008. Agricultural landscapes with organic crops support higher pollinator diversity. Oikos 117:354–361.CrossRefGoogle Scholar
25Furness, R.W. 1993. Birds as monitors of pollutants. In Furness, R.W. and Greenwood, J.J.D. (eds). Birds as Monitors of Environmental Change. Chapman and Hall, London. p. 86–143.CrossRefGoogle Scholar
26Chappell, M.J., Vandermeer, J., Badgley, C., and Perfecto, I. 2009. Wildlife friendly farming vs land sparing. Frontiers in Ecology and the Environment 7:183–184.CrossRefGoogle Scholar
27Moreby, S.J., Aebischer, N.J., Southway, S.E., and Sotherton, N.W. 1994. A comparison of the flora and arthropod fauna of organically and conventionally grown winter wheat in southern England. Annals of Applied Biology 125:13–27.CrossRefGoogle Scholar
28Davies, D.H.K., Christal, A., Talbot, M., Lawson, H.M., and Wright, G.M. 1997. Changes in weed populations in the conversion of two arable farms to organic farming. In: British Crop Protection Council (eds). Proceedings of the 1997 Brighton Crop Protection Conference Weeds. British Crop Protection Council, Farnham. p. 973–978.Google Scholar
29Albrecht, H. and Mattheis, A. 1998. The effects of organic and integrated farming on rare arable weeds on the Forschungsverbund. Agrarokosysteme Munchen (FAM) Research Station in southern Bavaria. Biological Conservation 86:347–356.CrossRefGoogle Scholar
30Weibull, A.C., Bengtsson, J. and Nohlgren, E. 2000. Diversity of butterflies in the agricultural landscape: the role of farming system and landscape heterogeneity. Ecography 23:743–750.CrossRefGoogle Scholar
31Aude, E., Tybirk, K., and Pedersen, M.B. 2003. Vegetation diversity of conventional and organic hedgerows in Denmark. Agriculture, Ecosystems and Environment 99:135–147.CrossRefGoogle Scholar
32Cotes, B., Castro, J., Cárdenas, M., and Campos, M. 2009. Responses of epigeal beetles to the removal of weed cover crops in organic olive orchards. Bulletin of Insectology 62:47–52.Google Scholar
33Beecher, N.A., Johnson, R.J., Case, R.M., Brandle, J.R., Case, R.M., and Young, L.J. 2002. Agroecology of birds in organic and nonorganic farmland. Conservation Biology 16:1620–1631.CrossRefGoogle Scholar
34Genghini, M., Gellini, S., and Gustin, M. 2006. Organic and integrated agriculture: the effects on bird communities in orchard farms in northern Italy. Biodiversity and Conservation 15:3077–3094.CrossRefGoogle Scholar
35Ondine, F.C., Jean, C., and Romain, J. 2009. Effects of organic and soil conservation management on specialist bird species. Agriculture, Ecosystems and Environment 129:140–143.CrossRefGoogle Scholar
36Hole, D.G., Whittingham, M.J., Bradbury, R.B., Anderson, G.Q.A., Lee, P.L.M., Wilson, J.D., and Krebs, J.R. 2002. Widespread local house-sparrow extinctions Agricultural intensification is blamed for the plummeting populations of these birds. Nature 418:931–932.CrossRefGoogle Scholar
37Booij, C.J.H. and Noorlander, J. 1992. Farming systems and insect predators. Agriculture, Ecosystems and Environment 40:125–135.CrossRefGoogle Scholar
38Pfiffner, L. and Luka, H. 2003. Effects of low intensity farming systems on carabids and epigeal spiders—a paired farm approach. Basic and Applied Ecology 4:117–127.CrossRefGoogle Scholar
39Hutton, S.A. and Giller, P.S. 2003. The effects of the intensification of agriculture on northern temperate dung beetle communities. Journal of Applied Ecology 40:994–1007.CrossRefGoogle Scholar
40Sónia, A.P., Santos, J., Pereira, A., Torres, L.M., and Nogueira, A.J.A. 2007. Evaluation of the effects on canopy arthropods of two agricultural management systems to control pests in olive groves from north–east of Portugal. Chemosphere 67:131–139.Google Scholar
41Feber, R.E., Firbank, L.G., Johnson, P.J., and MacDonald, D.W. 1997. The effects of organic farming on pest and non-pest butterfly abundance. Agriculture, Ecosystems and Environment 64:133–139.CrossRefGoogle Scholar
42Pfiffner, L. and Niggli, U. 1996. Effects of biodynamic organic and conventional farming on ground beetles (Carabidae) and other epigaeic arthropods in winter wheat. Biological Agriculture and Horticulture 12:353–364.CrossRefGoogle Scholar
43Reddersen, J. 1997. The arthropod fauna of organic versus conventional cereal fields in Denmark. Biological Agriculture and Horticulture 15:61–71.CrossRefGoogle Scholar
44Furness, R.W., Greenwood, J.J.D. and Jarvis, P.J. 1993. Can birds be used to monitor the environment? In Furness, R.W. and Greenwood, J.J.D. (eds). Birds as Monitors of Environmental Change. Chapman and Hall, London. p. 1–41.CrossRefGoogle Scholar
45Foschi, U.F. and Gellini, S. 1983. Avifauna e ambiente in Provincia di Forlı/Le comunita/di uccelli come indicatori ecologici. Forli, cereals. Agriculture Ecosystem and Environment 97:131–149.Google Scholar
46Henderson, I.G., Critchley, N.R., Cooper, J., and Fowbert, J.A. 2001. Breeding season responses of Skylarks Alauda arvensis to vegetation structure in set-aside (fallow arable land). Ibis 43:317–321.CrossRefGoogle Scholar
47Donald, P.F., Pisano, G., Rayment, M.D., and Pain, D.J. 2002. Review: The Common Agricultural Policy. EU enlargement and the conservation of Europe's farmland birds. Agriculture, Ecosystems and Environment 89:167–182.CrossRefGoogle Scholar
48Nikolaidou, A.H. 2007. Effect of farming practices on the soil and plant diversity in organic and conventional vineyards. Doctoral thesis, University of Thessaloniki, Greece (in Greek).Google Scholar
49Monokrousos, N. 2007. Estimate of quality of organically managed soils. Doctoral thesis, University of Thessaloniki, Greece (in Greek).Google Scholar
50Tsiafouli, A.M. 2007. Soil biodiversity of organic and conventional agroecosystems. Doctoral thesis, University of Thessaloniki, Greece (in Greek).Google Scholar
51Hadjicharalambous, H., Kalburtji, K.L. and Mamolos, A.P. 2001. The relationship between land cover/use types and diversity of weed and carabid beetles in organic and conventional agroecosystems. In Proceedings of the 7th International Conference on Environmental Science and Technology. Ermoupolis, Syros island, Greece, 3–6 September 2001, University of the Aegean and GLOBAL NEST V. III. p. 152–159.Google Scholar
52Hadjicharalambous, H., Kalburtji, K.L., and Mamolos, A.P. 2002. Soil arthropod (Coleoptera, Isopoda) in organic and conventional agroecosystems. Environmental Management 29:683–690.CrossRefGoogle Scholar
53Berki, E. 2005. Structure of soil fauna in conventional, organic and integrated olive groves in Messara plain, Crete during the winter period. Dissertation, School of Technologies in Agriculture, A.T.E.I. of Crete, Greece (in Greek).Google Scholar
54Agapakis, G. 2005. Soil fauna diversity in organic, conventional and abandoned olive groves. Dissertation, School of Technologies in Agriculture. A.T.E.I. of Crete, Greece (in Greek).Google Scholar
55Stratsinnis, A. 2006. Diversity of Coleoptera in nine different olive groves in Messara plain, Crete. Dissertation, School of Technologies in Agriculture, A.T.E.I. of Crete, Greece (in Greek).Google Scholar
56Tzaneli, G. 2006. Study of flora in organic, conventional and abandoned olive groves. Dissertation, School of Technologies in Agriculture, A.T.E.I. of Crete, Greece (in Greek).Google Scholar
57Hellenic National Meteorological Service 2007. Available at Web site http://www.hnms.gr/hnms/greek/index_html(accessed March 21, 2011).Google Scholar
58Theodorakis, M.X. 1995. Structure, dynamics and management of island olive groves. Doctoral thesis, Department of Environmental Studies, University of the Aegean, Mytilene, Greece (in Greek).Google Scholar
59Koutsidou, E. 1995. Natural regeneration of degrading Mediterranean ecosystems as a result of the prohibition of grazing pressure—The case of Chios island. Doctoral thesis, Department of Environmental Studies, University of the Aegean, Mytilene, Greece (in Greek).Google Scholar
60Farina, A. 1995. Distribution and dynamics of birds in a rural sub-Mediterranean landscape. Landscape and Urban Planning 31:269–280.CrossRefGoogle Scholar
61Jobin, B., Choiniere, L., and Belanger, L. 2001. Bird use of three types of field margins in relation to intensive agriculture in Quebec, Canada. Agriculture, Ecosystems and Environment 84:131–143.CrossRefGoogle Scholar
62Bibby, C.J., Burgess, N.D., Hill, B.A., and Mustoe, S.H. 1992. Birds Census Techniques. Academic Press, London. p. 302.Google Scholar
63Blondel, J. 1981. Structure and dynamics of bird communities in Mediterranean habitats. In Castri, F., Goodall, D.W., and Specht, R.L. (eds). Ecosystems of the World ‘Mediterranean type shrublands’. Elsevier, Scientific Publishing Co, Amsterdam. p. 361–385.Google Scholar
64Cody, L.M. 1985. Habitat Selection in Birds. Academic Selection in Birds. Academic Press, San Diego, CA.Google Scholar
65Collin, J., Burgess, B., and Hill, A. 1992. Bird Census Techniques. British Trust for Ornithology (BTO)—Royal Society for the Protection of Birds (RSPB), Academic Press, London.Google Scholar
66Zar, J.H. (ed.). 1996. Biostatistical Analysis. Prentice Hall, New York. p. 662.Google Scholar
67Sokal, R.R. and Rohlf, F.J. (eds). 1995. Biometry. Freeman, New York. p. 543, 556–558.Google Scholar
68Whittaker, R.H. 1965. Dominance and diversity in land plant communities. Science 147:250–260.CrossRefGoogle ScholarPubMed
69Hunter, M.L. Jr. 2002. Fundamentals of Conservation Biology. Blackwell Science, Massachusetts, USA.Google Scholar
70Oglethorpe, D.R. and Sanderson, R. 1998. Farm characteristics and the vegetative diversity of grasslands in the North of England: a policy perspective. Biodiversity and Conservation 7:1333–1347.CrossRefGoogle Scholar
71Sachs, L. 1999. Angewandte Statistik. Springer, Berlin. p. 881.Google Scholar
72Ekschmitt, K., Stierhof, T., Dauber, J., Kreimes, K., and Wolters, V. 2003. On the quality of soil biodiversity indicators: abiotic and biotic parameters as predictors of soil faunal richness at different spatial scales. Agriculture, Ecosystems and Environment 98:273–283.CrossRefGoogle Scholar
73PASW for Windows, Rel. 18.0.2009. PASW Inc., Chicago.Google Scholar
74Dufrêne, M. and Legendre, P. 1997. Species assemblages and indicator species: the need for a flexible asymmetrical approach. Ecological Monographs 67:345–366.Google Scholar
75Dufrêne, M. 1999. IndVal or how to identify indicator species of a sample typology. Available at Web site http://mrw.wallonie.be/dgrne/sibw/outils/indval/home.htmlS.Google Scholar
76Magnesia Agricultural Development Office 2007. Archives data.Google Scholar
77Karetsos, G. 2002. Study of the ecology and vegetation of Mountain Oiti. Doctoral thesis, University of Patras, Greece (in Greek).Google Scholar
78Dimopoulos, P. 1993. Research on flora and plant sociology of the Killini mountain—an ecological approach. Doctoral thesis, Department of Biology, University Patras, Greece (in Greek).Google Scholar
79Uysal, S. and Karabacak, E. 2003. The flora of agricultural areas and their environs in Canakkale (Lapseki-Ezine). Turkish Journal of Botany 27:103–116.Google Scholar
80Uremis, I. 2005. Determination of weed species and their frequency and density in olive groves in Hatay of Turkey. Pakistan Journal of Biological Sciences 8:164–167.Google Scholar
81Wilson, G.C. 1993. Mediterranean wild flowers. Harper Collins, Great Britain. p. 543.Google Scholar
82Rydberg, N.T. and Milberg, P. 2000. A survey of weeds in organic farming in Sweden. Biological Agriculture and Horticulture 18:175–185.CrossRefGoogle Scholar
83Hyvönen, T. and Salonen, J. 2002. Weed species diversity and community composition in cropping practices at two intensity levels a six year experiment. Plant Ecology 159:73–81.CrossRefGoogle Scholar
84Pleasant, J. and Schlater, K.J. 1994. Incidence of weed seed in cow manure and its importance as a weed source in cropland. Weed Technology 8:304–310.CrossRefGoogle Scholar
85Hald, A.B. 1999. Weed vegetation (wild flora) of long established organic versus conventional cereal fields in Denmark. Annals of Applied Biology 134:307–314.CrossRefGoogle Scholar
86Bonham, C.D. 1989. Measurements for terrestrial vegetation. John Wiley and Sons, New York. p. 338.Google Scholar
87Drinkwater, L.E., Letoumeau, D.K., Workneh, F., Van Bruggen, A.H.C., and Shennan, C. 1995. Fundamental differences between conventional and organic tomato agroecosystems in California. Ecological Applications 5:1098–1112.CrossRefGoogle Scholar
88Ryan, M. 1999. Is an enhanced soil biological community relative to conventional neighbors a consistent feature of alternative (organic and biodynamic) agricultural systems? Biological Agriculture and Horticulture 17:131–144.CrossRefGoogle Scholar
89Maeder, P., Fliessbach, A., Dubois, D., Gunst, L., Fried, P., and Niggli, U. 2002. Soil fertility and biodiversity in organic farming. Science 296:1694–1697.CrossRefGoogle Scholar
90International Federation of Organic Agriculture Movements (IFOAM) 2004. Available at Web site http://www.ifoam.org/(accessed March 21, 2011).Google Scholar
91Roschewitz, I., Gabriel, D., Tsharntke, T., and Thies, C. 2005. The effects of landscape complexity on arable weed species diversity in organic and conventional farming. Journal of Applied Ecology 42:873–882.CrossRefGoogle Scholar
92Poveda, K., Dewenter, I.S., Scheu, S., and Tscharntke, T. 2006. Belowground effects of organic and conventional farming on aboveground plant-herbivore and plant pathogen interactions. Agriculture Ecosystems and Environment 113:162–167.CrossRefGoogle Scholar
93Kharkwal, G., Mehrotra, P., Rawat, Y.S., and Pangtey, Y.P.S. 2005. Phytodiversity and growth form in relation to altitudinal gradient in the Central Himalayan (Kumaun) region of India. Current Science 89:873–878.Google Scholar
94Pavón, N.P., Hernandez-Trejo, H., and Rico-Gray, V. 2000. Distribution of plant life forms along an altitudinal gradient in the semi-arid valley of Zapotitlan, Mexico. Journal of Vegetation Science 11:39–42.CrossRefGoogle Scholar
95Grace, J.B. 1999. The factors controlling species density in herbaceous plant communities: an assessment. Perspectives in Plant Ecology. Evolution and Systematics 2:1–28.CrossRefGoogle Scholar
96Mittelbach, G.G., Steiner, C.F., Scheiner, S.M., Gross, K.L., Reynolds, H.L., Waide, R.B., Willig, M.R., Dodson, S.I., and Gough, L. 2001. What is the observed relationship between species richness and productivity? Ecology 82:2381–2396.CrossRefGoogle Scholar
97Loreau, M. 2000. Biodiversity and ecosystem functioning: recent theoretical advances. Oikos 91:3–17.CrossRefGoogle Scholar
98Scheiner, S.M. and Jones, S. 2002. Diversity, productivity and scale in Wisconsin vegetation. Evolutionary Ecology Research 4:1097–1117.Google Scholar
99Symstad, A.J., Chapin, F.S., Wall, D.H., Gross, K.L., Huenneke, L.F., Mittelbach, G.G., Peters, D.P.C., Thebault, E., and Loreau, M. 2003. Food-web constraints on biodiversity–ecosystem functioning relationships. Proceedings of the National Academy of Sciences of The United States of America 100:14949–14954.Google Scholar
100Ni, J., Wang, G.H., Bai, Y.F., and Li, X.Z. 2007. Scale-dependent relationships between plant diversity and above-ground biomass in temperate grasslands in South-Eastern Mongolia. Journal of Arid Environments 68:132–142.CrossRefGoogle Scholar
101Vujnovic, K., Wein, R.W., and Dale, M.R.T. 2002. Predicting plant species diversity in response to disturbance magnitude in grassland remnants of central Alberta. Canadian Journal of Botany 80:504–511.CrossRefGoogle Scholar
102Hashemi, S.A. 2010. Evaluating Plant Species Diversity and Physiographical Factors in Natural Broad Leaf Forest. American Journal of Environmental Sciences 6:20–25.CrossRefGoogle Scholar
103Therios, J. 2005. Olive cultivation. Gargataganis, D. Publications, Thessaloniki, Greece. p. 528.Google Scholar
104Peet, R.K. 1974. The measurement of species diversity. Annual Review of Ecology and Systematics 5:285–307.CrossRefGoogle Scholar
105Petersen, S., Axelsen, J.A., Tybirk, K., Aude, E., and Vestergaard, P. 2006. Effects of organic farming on field boundary vegetation in Denmark. Agriculture Ecosystems and Environment 113:302–306.CrossRefGoogle Scholar
106Ahnström, J. 2002. Ekologisk lantbruk og biologisk maångfald—en litteraturgenomgång. SLU. Sveriges Lantbruksuniversitet, Uppsala.Google Scholar
107Condron, L.M., Cameron, K.C., Di, H.J., Clough, T.J., Forbes, E.A., McLaren, R.G., and Silva, R.G. 2000. A comparison of soil and environmental quality under organic and conventional farming systems in New Zealand. New Zealand Journal of Agricultural Research 43:443–466.CrossRefGoogle Scholar
108Fliessbach, A., Oberholzer, H.R., Gunst, L., and Mäde, P. 2007. Soil organic matter and biological soil quality indicators after 21 years of organic and conventional farming. Agriculture, Ecosystems and Environment 118:1–4.CrossRefGoogle Scholar
109McIntosh, R.I. 1967. An index of diversity and the relation of certain concepts to diversity. Ecology 48:392–404.CrossRefGoogle Scholar
110McNaughton, S.J. 1977. Diversity and stability of ecological communities: a comment on the role of empiricism in ecology. American Naturalist 111:515–525.CrossRefGoogle Scholar
111Tilman, D. 1996. Biodiversity: population versus ecosystem stability. Ecology 77:350–363.CrossRefGoogle Scholar
112Hurlbert, S.H. 1971. The non-concept of species diversity: a critique and alternative parameters. Ecology 52:577–586.CrossRefGoogle Scholar
113Alatalo, R.V. 1991. Problems in the measurement of evenness in ecology. Oikos 37:199–204.CrossRefGoogle Scholar
114Schluter, D. and Ricklefs, R.E. 1993. Species diversity: an introduction to the problem. In Ricklefs, R.E. and Schluter, D. (eds). Species Diversity in Ecological Communities: Historical and Geographical Perspectives. University of Chicago Press, Chicago. p. 1–10.Google Scholar
115Huston, M. 1994. Biological diversity: the coexistence of species on changing landscapes. Cambridge University Press, Cambridge.Google Scholar
116Mullarney, K., Zetterstrom, L.D., and Grant, P. 2009. The birds of Greece, Cyprus and Europe. Hellenic Ornithological Society, Greece. p. 400.Google Scholar
117Freemark, K. and Boutin, C. 1995. Impacts of agricultural herbicide use on terrestrial wildlife in temperate landscapes: a review with special reference to North America. Agriculture Ecosystems and Environment 52:67–91.CrossRefGoogle Scholar
118Round, P.D., Gale, G.A., and Brockelman, W.Y. 2006. A comparison of bird communities in mixed fruit orchards and natural forest at Khao Luang, southern Thailand. Biodiversity and Conservation 15:2873–2891.CrossRefGoogle Scholar
119Van Horne, B. 1983. Density as a misleading indicator of habitat quality. Journal of Wildlife Management 47:893–901.CrossRefGoogle Scholar
120Weibull, A.C., Östman, Ö., and Granqvist, A. 2003. Species richness in agroecosystems: the effect of landscape, habitat and farm management. Biodiversity and Conservation 12:1335–1355.CrossRefGoogle Scholar
121Bradbury, R.B., Bailey, C.M., Wright, D., and Evans, A.D. 2008. Wintering Cirl Buntings Emberiza cirlus in southwest England select cereal stubbles that follow a low-input herbicide regime. Bird Study 55:23–31.CrossRefGoogle Scholar
122Boatman, N.D., Brickle, N.W., Hart, J.D., Holland, J.M., Milsom, T.P., Morris, A.J., Murray, A.W.A., Murray, K.A., and Robertson, P.A. 2004. Evidence for the indirect effects of pesticides on farmland birds. Ibis 146:131–143.CrossRefGoogle Scholar
123Wolnicki, K., Lesinski, G., and Rembiakowska, E. 2009. Birds inhabiting organic and conventional farms in Central Poland. Acta Zoologica Cracoviensia 52:1–10.CrossRefGoogle Scholar
124Newton, I. 1998. Bird conservation problems resulting from agricultural intensification in Europe. In Marzluff, J. and Sallabanks, M.R. (eds). Avian Conservation: Research and Management. Island Press, Washington, DC. p. 307–322.Google Scholar
125Gaston, K.J., Evans, K.L., and Lennon, J.J. 2007. The scaling of spatial turnover: pruning the thicket. In Storch, D., Marquet, P.A., and Browm, J.H. (eds). Scaling Biodiversity. Cambridge University Press, Cambridge. p. 181–222.CrossRefGoogle Scholar
126Qian, H. 2009. Global comparisons of beta diversity among mammals, birds, reptiles and amphibians across spatial scales and taxonomic ranks. Journal of Systematics and Evolution 47:509–514.CrossRefGoogle Scholar
127Stais, S. and Pyrovetsi, M. 2006. Bird fauna and distribution compare in Special Protected Area grasslands in Menikio and Holomontas Mountain. Department of Ecology, School of Biology, Aristotle University of Thessaloniki, Greece (in Greek).Google Scholar
128Møller, A.P. and Mousseau, T.A. 2007. Species richness and abundance of forest birds in relation to radiation at Chernobyl. Biology Letters 3:483–486.CrossRefGoogle ScholarPubMed
129Nilson, S.G. 1979. Density and species richness of some forest bird communities in South Sweden. Oikos 33:392–401.CrossRefGoogle Scholar
130Stirling, G. and Wilsey, B. 2001. Empirical relationships between species richness, evenness and proportional diversity. The American Naturalist 158:286–299.CrossRefGoogle ScholarPubMed
131Verhulst, J., Báldi, A., and Kleijn, D. 2004. Relationship between land-use intensity and species richness and abundance of birds in Hungary. Agriculture Ecosystems and Environment 104:465–473.CrossRefGoogle Scholar
132Ding, T.S., Yuan, H.W., Geng, S., Lin, Y.S., and Lee, P.F. 2005. Energy flux, body size and density in relation to bird species richness along an elevational gradient in Taiwan. Global Ecology and Biogeography 14:299–306.CrossRefGoogle Scholar
133Kissling, W.D., Field, R., and Böhning-Gaese, K. 2008. Spatial patterns of woody plant and bird diversity: functional relationships or environmental effects? Global Ecology Biogeography 17:327–339.CrossRefGoogle Scholar
134Ranjit Daniels, R.J., Daniels, A., Joshio, N.V., and Gadgil, M. 1992. On the relationship between bird and woody plant species diversity in the Uttara Kannada district of south India. Ecology 89:5311–5315.Google Scholar
135Vessby, K., Soderstrom, B., Glimskar, A., and Svensson, B. 2002. Species-richness correlations of six different taxa in Swedish semi natural grasslands. Conservation Biology 16:430–439.CrossRefGoogle Scholar
136Weibull, A.C., Östman, Ö., and Granqvist, A. 2003. Species richness in agroecosystems: the effect of landscape, habitat and farm management. Biodiversity and Conservation 12:1335–1355.CrossRefGoogle Scholar
137Wolters, V., Bengtsson, J., and Zaitsev, A.S. 2006. Relationship among the species richness of different taxa. Ecology 87:1886–1895.CrossRefGoogle ScholarPubMed
138Avibirds European Birdguide. Available at Web site http://www.avibirds.com/euhtml/Jay.html(accessed March 21,2011).Google Scholar