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References

  • Aebischer, N.J. (1991). Twenty years of monitoring invertebrates and weeds in cereal fields in Sussex. In: The Ecology of Temperate Cereal Fields (eds Firbank, L.G., Carter, N., Darbyshire, J.F. & Potts, G.R.). Blackwell Scientific Publications, Oxford, UK, pp. 305331.
  • Altieri, M.A. (1999). The ecological role of biodiversity in agroecosystems. Agric. Ecosyst. Environ., 74, 1931.
  • Altieri, M.A. & Letourneau, D.K. (1984). Vegetation diversity and insect pest outbreaks. CRC Crit. Rev. Plant Sci., 2, 131169.
  • Andow, D.A. (1983). The extent of monoculture and insect pest populations: a comparison of wheat and cotton. Agric. Ecosyst. Environ., 9, 2535.
  • Andrén, H. (1994). Effects of habitat fragmentation on birds and mammals in landscapes with different proportions of suitable habitat: a review. Oikos, 71, 355366.
  • Andrén, H. (1996). Population responses to habitat fragmentation: statistical power and the random sample hypothesis. Oikos, 76, 235242.
  • Armbrecht, I. & Perfecto, I. (2003). Litter-twig dwelling ant species richness and predation potential within a forest fragment and neighbouring coffee plantations of contrasting habitat quality in Mexico. Agric. Ecosyst. Environ., 97, 107115.
  • Barbosa, P. (2003). Conservation Biological Control. Academic Press, San Diego, USA.
  • Bardgett, R.D. (2002). Causes and consequences of biological diversity in soil. Zoology, 105, 367374.
  • Bawa, K.S., Kress, W.J., Nadkarni, N.M., Lele, S., Raven, P.H., Janzen, D.H. et al. (2004). Tropical ecosystems into the 21st century. Science, 306, 227228.
  • Bengtsson, J., Engelhardt, K., Giller, P., Hobbie, S., Lawrence, D., Levine, J. et al. (2002). Slippin’ and slidin’ between the scales: the scaling components of biodiversity-ecosystem functioning relations. In: Biodiversity and Ecosystem Functioning (eds Loreau, M., Naeem, S. & Inchausti, P.). Oxford University Press, Oxford, UK, pp. 209220.
  • Bengtsson, J., Angelstam, P., Elmquvist, T., Emanuelsson, U., Forbes, C., Ihse, M. et al. (2003). Reserves, resilience and dynamic landscapes. Ambio, 32, 389396.
  • Bengtsson, J., Ahnström, J. & Weibull, A.C. (2005). The effects of organic agriculture on biodiversity and abundance: a meta-analysis. J. Appl. Ecol., 42, 261269.
  • Benton, T.G., Bryant, D.M., Cole, L. & Crick, H.Q.P. (2002). Linking agricultural practice to insect and bird populations: a historical study over three decades. J. Appl. Ecol., 39, 273287.
  • Benton, T.G., Vickery, J.A. & Wilson, J.D. (2003). Farmland biodiversity: is habitat heterogeneity the key? Trends Ecol. Evol., 18, 182188.
  • Bestelmeyer, B.T., Miller, J.R. & Wiens, J.-A. (2003). Applying species diversity theory to land management. Ecol. Appl., 13, 17501761.
  • Bignal, E.M. & McCracken, D.I. (1996). Low-intensity farming systems in the conservation of the countryside. J. Appl. Ecol., 33, 413424.
  • Brodmann, P.A., Wilcox, C.V. & Harrison, S. (1997). Mobile parasitoid may restrict the spatial spread of an insect outbreak. J. Anim. Ecol., 66, 6572.
  • Bullock, J.M., Pywell, R.F., Burke, M.J.W. & Walker, K.J. (2001). Restoration of biodiversity enhances agricultural production. Ecol. Lett., 4, 185189.
  • Cardinale, B.J., Harvey, C.T., Gross, K. & Ives, A.R. (2003). Biodiversity and biocontrol: emergent impacts of a multi-enemy assemblage on pest suppression and crop yield in an agroecosystem. Ecol. Lett., 6, 857865.
  • Catovsky, S., Bradford, M.A. & Hector, A. (2002). Biodiversity and ecosystem productivity: implications for carbon storage. Oikos, 97, 443448.
  • Chamberlain, D.E., Fuller, R.J., Bunce, R.G.H., Duckworth, J.C. & 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, 771778.
  • Chang, G.C. (1996). Comparison of single versus multiple species of generalist predators for biological control. Environ. Entomol., 25, 207212.
  • Chape, S., Blyth, S., Fish, L., Fox, P. & Spalding, M. (2003). United Nations List of Protected Areas. IUCN and UNEP-WCMC, Cambridge, UK. Available at: http://www.unep.org/PDF/Un-list-protected-areas.pdf
  • Chapin, F.S. III, Zavaleta, E.S., Eviner, V.T., Naylor, R.L., Vitousek, P.M., Reynolds, H.L. et al. (2002). Consequences of changing biodiversity. Nature, 405, 234242.
  • Clay, K. (2004). Fungi and the food of the gods. Nature, 427, 401402.
  • Collins, W.A. & Qualset, C.O. (1999). Biodiversity in Agroecosystems. CRC Press, Boca Raton, USA.
  • Corbett, A. & Rosenheim, J.A. (1996). Impact of a natural enemy overwintering refuge and its interaction with the surrounding landscape. Ecol. Entomol., 21, 155164.
  • Daily, G.C. (1997). Nature's Services: Social Dependence on Natural Ecosystems. Island Press, Washington, DC, USA.
  • Denys, C. & Tscharntke, T. (2002). Plant-insect communities and predator-prey ratios in field margin strips, adjacent crop fields, and fallows. Oecologia, 130, 315324.
  • Donald, P.F. (2004). Biodiversity impacts of some agricultural commodity production systems. Conserv. Biol., 18, 1737.
  • Donald, R.F., Green, R.E. & Heath, M.F. (2001). Agricultural intensification and the collapse of Europe's farmland bird populations. Proc. R. Soc. Lond. B, 268, 2529.
  • Driscoll, M.J.L. & Donovan, T.M. (2004). Landscape context moderates edge effects: nesting success of wood thrushes in central New York. Conserv. Biol., 18, 13301338.
  • Duelli, P. & Obrist, M.K. (2003). Regional biodiversity in an agricultural landscape: the contribution of seminatural habitat islands. Basic Appl. Ecol., 4, 129138.
  • Duffy, J.E. (2003). Biodiversity loss, trophic skew and ecosystem functioning. Ecol. Lett., 6, 680687.
  • Dwyer, G., Dushoff, J. & Yee, S.H. (2004). The combined effects of pathogens and predators on insect outbreaks. Nature, 430, 341345.
  • Elmqvist, T., Folke, C., Nyström, M., Peterson, G., Bengtsson, J., Walker, B. et al. (2003). Response diversity, ecosystem change, and resilience. Front. Ecol. Environ., 1, 488494.
  • Finke, D.L. & Denno, R.F. (2004). Predator diversity dampens trophic cascades. Nature, 429, 407410.
  • Folke, C., Holling, C.S. & Perrings, C. (1996). Biological diversity, ecosystems and the human scale. Ecol. Appl., 6, 10181024.
  • Gabriel, D., Thies, T. & Tscharntke, T. (2005a). Landscape complexity promotes local diversity of arable weeds. Perspect. Plant Ecol. Evol. Syst. (in press).
  • Gabriel, D., Roschewitz, I., Tscharntke, T. & Thies, T. (2005b). Relative importance of beta diversity at different spatial scales – plant communities in organic and conventional agriculture. J. Appl. Ecol. (in press).
  • Gaston, K.J. & Spicer, J.I. (2004). Biodiversity. An Introduction. Blackwell Publishing, Oxford, UK.
  • Gathmann, A. & Tscharntke, T. (2002). Foraging ranges of solitary bees. J. Anim. Ecol., 71, 757764.
  • Groot, A.T. & Dicke, M. (2002). Insect-resistant transgenic plants in a multi-trophic context. Plant J., 31, 387406.
  • Gurr, G.M., Wratten, S.D. & Luna, J.M. (2003). Multi-function agricultural biodiversity: pest management and other benefits. Basic Appl. Ecol., 4, 107116.
  • Hails, R.S. (2002). Assessing the risks associated with new agricultural practices. Nature, 418, 685688.
  • Halaj, J. & Wise, D.H. (2001). Terrestrial trophic cascades: how much do they tickle? Am. Nat., 157, 262281.
  • Hawkins, B.A., Mills, N.J., Jervis, M.A. & Price, P.W. (1999). Is the biological control of natural enemies a natural phenomenon? Oikos, 86, 493506.
  • Hedlund, K., Griffiths, B., Christensen, S., Scheu, S., Setälä, H., Tscharntke, T. et al. (2004). Trophic interactions in changing landscapes: responses of soil food webs. Basic Appl. Ecol., 5, 495503.
  • Hole, D.G., Perkins, A.J., Wilson, J.D., Alexander, I.H., Grice, P.V. & Evans, A.D. (2005). Does organic farming benefit biodiversity? Biol. Conserv., 122, 113130.
  • Holt, A.R. & Gaston, K.J. (2002). Occupancy-abundance relationships and spatial distribution: a review. Basic Appl. Ecol., 3, 113.
  • Holt, R.D. (1996). Food webs in space: an island biogeographic perspective. In: Food Webs (eds Polis, G.A. & Winemiller, K.O.). Chapman & Hall, New York, USA, pp. 313323.
  • Holt, R.D., Lawton, J.H., Polis, G.A. & Martinez, N.D. (1999). Trophic rank and the species-area relationship. Ecology, 80, 14951504.
  • Hunter, M.D. (2002). Landscape structure, habitat fragmentation, and the ecology of insects. Agric. For. Entomol., 4, 159166.
  • Huston, M.A. & Marland, G. (2003). Carbon management and biodiversity. J. Environ. Manage., 67, 7786.
  • Isselstein, J. (2003). Erhaltung und Förderung der Pflanzenartenvielfalt auf dem Grünland aus landwirtschaftlicher Sicht. Nova Acta Leopold., NF 87/328, 99111.
  • Jackson, D.L. & Jackson, L.J. (2002). The Farm as Natural Habitat. Reconnecting Food Systems with Ecosystems. Island Press, Washington, DC, USA.
  • Kaule, G. (1991). Artenschutz in intensiv genutzter Landschaft. Wiss. Beitr. Univ. Halle Wittenberg, 6, 386397.
  • Kenmore, P.E., Cariño, F.O., Perez, C.A., Dyck, V.A. & Gutierrez, A.P. (1984). Population regulation of the rice brown planthopper (Nilaparvata lugens Stål) within rice fields in the Philippines. J. Plant Prot. Trop., 1, 1937.
  • Kennedy, T.A., Naeem, S., Howe, K.M., Knops, J.M.H., Tilman, D. & Reich, P. (2002). Biodiversity as a barrier to ecological invasion. Nature, 417, 636638.
  • Kleijn, D. & Sutherland, W.J. (2003). How effective are European agri-environment schemes in conserving and promoting biodiversity? J. Appl. Ecol., 40, 947969.
  • Kleijn, D., Berendse, F., Smit, R. & Gilissen, N. (2001). Agri-environment schemes do not effectively protect biodiversity in Dutch agricultural landscapes. Nature, 413, 723725.
  • Klein, A., Steffan-Dewenter, I. & Tscharntke, T. (2003a). Fruit set of highland coffee depends on the diversity of pollinating bees. Proc. R. Soc. Lond., B, 270, 955961.
  • Klein, A., Steffan-Dewenter, I. & Tscharntke, T. (2003b). Flower visitation and fruit set of Coffea canephora in relation to local and regional agroforestry management. J. Appl. Ecol., 40, 837845.
  • Krause, U. & Poehling, H.M. (1996). Overwintering, oviposition and population dynamics of hoverflies (Diptera: Syrphidae) in northern Germany in relation to small and large-scale landscape structure. Acta Jutlandica, 71, 157169.
  • Krauss, J., Steffan-Dewenter, I. & Tscharntke, T. (2003). Species richness and density of butterflies on calcareous grasslands differing in area, isolation, and landscape context. J. Biogeogr., 30, 889900.
  • Kremen, C., Williams, N.M. & Thorp, R.W. (2002). Crop pollination from native bees at risk from agricultural intensification. Proc. Natl Acad. Sci. U S A, 99, 1681616821.
  • Kremen, C., Williams, N.M., Bugg, R.L., Fay, J.P. & Thorp, R.W. (2004). The area requirement of an ecosystem service: crop pollination by native bee communities in California. Ecol. Lett., 7, 11091119.
  • Kruess, A. (2003). Landscape structure and habitat type affect the diversity and interactions of seed-feeding and stem-boring insects on Cirsium arvense (L.) Scop. Ecography, 26, 283290.
  • Kruess, A. & Tscharntke, T. (1994). Habitat fragmentation, species loss, and biological control. Science, 264, 15811584.
  • Kruess, A. & Tscharntke, T. (2000). Species richness and parasitism in a fragmented landscape: experiments and field studies with insects on Vicia sepium. Oecologia, 122, 129137.
  • Landis, D.A. & Marino, P.C. (1999). Landscape structure and extra-field processes: impact on management of pests and beneficials. In: Handbook of Pest Management (ed. Ruberson, J.R.). Marcel Dekker Inc., New York, USA, pp. 79104.
  • Laurance, W.F. (2001). Future shock: forecasting a grim fate for the earth. Trends Ecol. Evol., 16, 531533.
  • Lepš, J. (2004). What do the biodiversity experiments tell us about consequences of plant species loss in the real world? Basic Appl. Ecol., 5, 529534.
  • Levine, J.M., Adler, P.B. & Yelenik, S.G. (2004). A meta-analysis of biotic resistance to exotic plant invasions. Ecol. Lett., 7, 975989.
  • Loreau, M. & Hector, A. (2001). Partitioning selection and complementarity in biodiversity experiments. Nature, 412, 7276.
  • Loreau, M., Naeem, S. & Inchausti, P. (2002). Biodiversity and Ecosystem Functioning. Oxford University Press, Oxford, UK.
  • Loreau, M., Mouquet, N. & Gonzales, A. (2003). Biodiversity as spatial insurance in heterogeneous landscapes. Proc. Natl Acad. Sci. U S A, 100, 1276512770.
  • Losey, J.E. & Denno, R.F. (1998). Positive predator-prey interactions: enhanced predation rates and synergistic suppression of aphid populations. Ecology, 79, 21432152.
  • Lyons, G.K. & Schwartz, M.W. (2001). Rare species loss alters ecosystem function – invasion resistance. Ecol. Lett., 4, 358365.
  • Mäder, P., Fließbach, A., Dubois, D., Gunst, L., Fried, P. & Niggli, U. (2002). Soil fertility and biodiversity in organic farming. Science, 296, 16941697.
  • Matson, P.A., Parton, W.J., Power, A.G. & Swift, M.J. (1997). Agricultural intensification and ecosystem properties. Science, 277, 504509.
  • Mittermeier, R.A., Mittermeier, C.G., Brooks, T.M., Pilgrim, J.D., Konstant, W.R., de Fonseca, G.A.B. et al. (2003). Wilderness and biodiversity conservation. Proc. Natl Acad. Sci. USA, 100, 1030910313.
  • Montoya, J.M., Rodriguez, M.A. & Hawkins, B.A. (2003). Food web complexity and higher-level ecosystem services. Ecol. Lett., 6, 587593.
  • Myers, J.H., Higgins, C. & Kovacs, E. (1989). How many species are necessary for the biological control of insects? Environ. Entomol., 18, 541547.
  • Nabhan, G.P. & Buchmann, S.L. (1997). Services provided by pollination. In: Nature's Services: Social Dependence on Natural Ecosystems (ed. Daily, G.C.), Island Press. Washington, DC, USA, pp. 133150.
  • van Nouhuys, S. & Hanski, I. (2002). Multitrophic interactions in space: metacommunity dynamics in fragmented landscapes. In: Multitrophic Level Interactions (eds Tscharntke, T. & Hawkins, B.A.). Cambridge University Press, Cambridge, UK, pp. 124147.
  • Östman, Ö., Ekbom, B. & Bengtsson, J. (2001). Farming practice and landscape heterogeneity influence biological control. Basic Appl. Ecol., 2, 365371.
  • Östman, Ö., Ekbom, B. & Bengtsson, J. (2003). Yield increase attributable to aphid predation by ground-living polyphagous natural enemies in spring barley in Sweden. Ecol. Econ., 45, 149158.
  • Paschke, M., Abs, C. & Schmid, B. (2002). Effects of population size and pollen diversity on reproductive success and offspring size in the narrow endemic Cochlearia bavarica (Brassicaceae). Am. J. Bot., 89, 12501259.
  • Pedersen, B.S. & Mills, N.J. (2004). Single vs. multiple introduction in biological control: the roles of parasitoid efficiency, antagonism and niche overlap. J. Appl. Ecol., 41, 973984.
  • Perfecto, I. & Armbrecht, I. (2003). The coffee agroecosystems in the neotropics: combining ecological and economic goals. In: Tropical Agroecosystems (ed. Vandermeer, J.H.). CRC Press, Boca Raton, USA, pp. 159194.
  • Perfecto, I., Rice, R., Greenberg, R. & van der Volt, M. (1996). Shade coffee as refuge of biodiversity. Bioscience, 46, 598608.
  • Perfecto, I., Vandermeer, J.H., Bautista, G.L., Nunez, G.I., Greenberg, R., Bichier, P. et al. (2004). Greater predation in shaded coffee farms: the role of resident neotropical birds. Ecology, 85, 26772681.
  • Peters, R.H. (1983). The Ecological Implications of Body Size. Cambridge University, Cambridge, UK.
  • Peterson, G., Allen, C.R. & Holling, C.S. (1998). Ecological resilience, biodiversity, and scale. Ecosystems, 1, 618.
  • Pfiffner, L. & Luka, H. (2003). Effects of low-input farming systems on carabids and epigeial spiders – a paired farm approach. Basic Appl. Ecol., 4, 117127.
  • Pickett, S.T.A. & Thompson, J.N. (1978). Patch dynamics and the design of nature reserves. Biol. Conserv., 13, 2737.
  • Pimental, D., Stachow, U., Takacs, A., Brubaker, W., Dumas, A.R., Meaney, J.S. et al. (1992). Conserving biological diversity in agricultural/forestry systems. Bioscience, 432, 354362.
  • Plachter, H. (1999). The contributions of cultural landscapes to nature conservation. In: Monument – Site – Cultural Landscape Exemplified by the Wachau (ed. Hajos, G.). Verlag Berger, Wien, Germany, pp. 93115.
  • Pressey, R.L., Watts, M.E. & Barrett, T.W. (2004). Is maximizing protection the same as minimizing loss? Efficiency and retention as alternative measures of the effectiveness of proposed reserves. Ecol. Lett., 7, 10351046.
  • Purtauf, T., Dauber, J. & Wolters, V. (2005). The response of carabids to landscape simplification differs between trophic groups. Oecologia, 142, 458464.
  • Putz, F.E., Blate, G.M., Redford, K.H., Fimbel, R. & Robinson, J. (2001). Tropical forest management and conservation of biodiversity: an overview. Conserv. Biol., 15, 720.
  • Pywell, R.F., Warman, E.A., Carvell, C., Sparks, T.H., Dicks, L.V., Bennett, D. et al. (2005). Providing foraging resources for bumblebees in intensively farmed landscapes. Biol. Conserv., 121, 479494.
  • Rice, R.A. & Greenberg, R. (2000). Cacao cultivation and the conservation of biological diversity. Ambio, 29, 167173.
  • Ricketts, T.H., Daily, G.C., Ehrlich, P.R. & Michener, C.D. (2004). Economic value of tropical forest to coffee production. Proc. Natl Acad. Sci. U S A, 101, 1257912582.
  • Ritchie, M.E. & Olff, H. (1999). Spatial scaling laws yield a synthetic theory of biodiversity. Nature, 400, 557560.
  • Robertson, G.P. & Swinton, S.M. (2005). Reconciling agricultural productivity and environmental integrity: a grand challenge for agriculture. Front. Ecol. Environ., 3, 3846.
  • Robinson, R.A. & Sutherland, W.J. (2002). Post-war changes in arable farming and biodiversity in Great Britain. J. Appl. Ecol., 39, 157176.
  • Rodriguez, M.A. & Hawkins, B.A. (2000). Diversity, function and stability in parasitoid communities. Ecol. Lett., 3, 3540.
  • Roland, J. & Taylor, P.D. (1995). Herbivore-natural enemy interactions in fragmented and continuous forests. In: Population Dynamics: New Approaches and Synthesis (eds Cappucino, N. & Price, P.W.). Academic Press, San Diego, USA, pp. 195208.
  • Roschewitz, I., Gabriel, D., Tscharntke, T. & Thies, C. (2005). Contrasting effects of landscape complexity on arable weed diversity in organic and conventional farming. J. Appl. Ecol. (in press).
  • Rosenheim, J.A. (1998). Higher-order predators and the regulation of insect herbivore populations. Annu. Rev. Entomol., 43, 421447.
  • Rosenheim, J.A., Wilhoit, L.R. & Armer, C.A. (1993). Influence of intraguild predation among generalist insect predators on the suppression of an herbivore population. Oecologia, 96, 439449.
  • Rosenzweig, M. (2003). Win-win Ecology. How the Earth's Species can Survive in the Midst of Human Enterprise. Oxford University Press, Oxford, UK.
  • Russell, E.P. (1989). Enemies hypothesis: a review of the effect of vegetational diversity on predatory insects and parasitoids. Environ. Entomol., 18, 590599.
  • Schellhorn, N.A. & Andow, D.A. (1999). Cannibalism and interspecific predation: role of oviposition behavior. Ecol. Appl., 9, 418428.
  • Scheu, S. (2001). Plants and generalist predators as links between the below-ground and above-ground system. Basic Appl. Ecol., 2, 313.
  • Schläpfer, F., Schmid, B. & Seidl, I. (1999). Expert estimates about effects of biodiversity on ecosystem processes and services. Oikos, 84, 346352.
  • Schmid, B. & Hector, A. (2004). The value of biodiversity experiments. Basic Appl. Ecol., 5, 535542.
  • Schmidt, M.H. & Tscharntke, T. (2005). Landscape context of sheetweb spider population dynamics in cereal fields. J. Biogeogr., 32, 467473.
  • Schmidt, M., Lauer, A., Purtauf, T., Thies, C., Schaefer, M. & Tscharntke, T. (2003). Relative importance of predators and parasitoids for cereal aphid control. Proc. R. Soc. Lond., B, 270, 19051909.
  • Schmidt, M.H., Roschewitz, I., Thies, C. & Tscharntke, T. (2005). Differential effects of landscape and management on diversity and density of ground-dwelling farmland spiders. J. Appl. Ecol., 42, 281287.
  • Schroth, G., da Fonseca, A.B., Harvey, C.A., Gascon, C., Vasconcelos, H.L. & Izac, A.M.N. (2004). Agroforestry and Biodiversity Conservation in Tropical Landscapes. Island Press, Washington, USA.
  • Schulze, C.H., Waltert, M., Kessler, P.J.A., Pitopang, R., Shahabuddin, Veddeler, D. et al. (2004). Biodiversity indicator taxa of tropical land-use systems, comparing plants, birds, and insects. Ecol. Appl., 14, 13211332.
  • Settle, W.H., Ariawan, H., Astuti, E.T., Cahyana, W., Hakim, A.L., Hindayana, D.H. et al. (1996). Managing tropical rice pests through conservation of generalist natural enemies and alternative prey. Ecology, 77, 19751988.
  • Snyder, W.E., Chang, G.C. & Prasad, R.P. (2005). Biodiversity and successful conservation biological control: is there a relationship. In: Ecology of Predator-prey Interactions (eds Barbosa, P. & Castellanos, I.). Oxford University Press, London, UK (in press).
  • Söderström, B., Svensson, B., Vessby, K. & Glimskar, A. (2001). Plants, insects and birds in semi-natural pastures in relation to local habitat and landscape factors. Biodivers. Conserv., 10, 18391863.
  • Sotherton, N.W. (1998). Land-use changes and the decline of farmland wildlife: an appraisal of the set-aside approach. Biol. Conserv., 83, 259268.
  • Steffan-Dewenter, I. & Tscharntke, T. (2000a). Resource overlap and possible competition between honey bees and wild bees in central Europe. Oecologia, 122, 288296.
  • Steffan-Dewenter, I. & Tscharntke, T. (2000b). Butterfly community structure in fragmented habitats. Ecol. Lett., 3, 449456.
  • Steffan-Dewenter, I., Münzenberg, U. & Tscharntke, T. (2001). Pollination, seed set, and seed predation on a landscape scale. Proc. R. Soc. Lond., B, 268, 16851690.
  • Steffan-Dewenter, I., Münzenberg, U., Bürger, C., Thies, C. & Tscharntke, T. (2002). Scale-dependent effects of landscape structure on three pollinator guilds. Ecology, 83, 14211432.
  • Summerville, K.S., Boulware, M.J., Veech, J.A. & Crist, T.O. (2003). Spatial variation in species diversity and composition of forest Lepidoptera in eastern deciduous forests of North America. Conserv. Biol., 17, 10451057.
  • Sutherland, W.J. (2002a). Restoring a sustainable countryside. Trends Ecol. Evol., 17, 148150.
  • Sutherland, W.J. (2002b). Openness in management. Nature, 418, 834835.
  • Swift, M.J. & Anderson, J.M. (1993). Biodiversity and ecosystem function in agricultural systems. In: Biodiversity and Ecosystem Function (eds Schulze, E.D. & Mooney, H.A.). Springer Verlag, Berlin, Germany, pp. 1541.
  • Swift, M.J., Izac, A.M.N. & van Noordwijk, M. (2004). Biodiversity and ecosystem services in agricultural landscapes – are we asking the right questions? Agric. Ecosyst. Environ., 104, 113134.
  • Symondson, W.O.C., Sunderland, K.D. & Greenstone, M.H. (2002). Can generalist predators be effective biocontrol agents? Annu. Rev. Entomol., 47, 561594.
  • Thies, C. & Tscharntke, T. (1999). Landscape structure and biological control in agroecosystems. Science, 285, 893895.
  • Thies, C., Steffan-Dewenter, I. & Tscharntke, T. (2003). Effects of landscape context on herbivory and parasitism at different spatial scales. Oikos, 101, 1825.
  • Thies, C., Roschewitz, I. & Tscharntke, T. (2005). Landscape context of cereal aphid-parasitoid interactions. Proc. R. Soc. Lond. B, 272, 203210.
  • Thurnbull, L.A., Crawley, M.J. & Rees, M. (2000). Are plant populations seed-limited? A review of seed sowing experiments. Oikos, 88, 11251238.
  • Tilman, D., Fargione, J., Wolff, B., D'Antonio, C., Dobson, A., Howarth, R. et al. (2001). Forecasting agriculturally driven global environmental change. Science, 292, 281284.
  • Tilman, D., Cassman, K.G., Matson, P.A., Naylor, R. & Polasky, S. (2002). Agricultural sustainability and intensive production practices. Nature, 418, 671677.
  • Tivy, J. (1990). Agricultural Ecology. Longman Group UK Limited, UK.
  • du Toit, J.T., Walker, B.H. & Campbell, B.M. (2004). Conserving tropical nature: current challenges for ecologists. Trends Ecol. Evol., 19, 1217.
  • Totten, M., Pandya, S.I. & Janson-Smith, T. (2003). Biodiversity, climate, and the Kyoto protocol: risks and opportunities. Front. Ecol. Environ., 1, 262270.
  • Tscharntke, T. (1992a). Cascade effects among four trophic levels: bird predation on galls affects density dependent parasitism. Ecology, 73, 16891698.
  • Tscharntke, T. (1992b). Coexistence, tritrophic interactions and density dependence in a species-rich parasitoid community. J. Anim. Ecol., 61, 5967.
  • Tscharntke, T. (2000). Parasitoid populations in agricultural landscapes. In: Parasitoid Population Biology (eds Hochberg, M.E. & Ives, A.R.). Princeton University Press, Princeton, USA, pp. 235253.
  • Tscharntke, T. & Brandl, R. (2004). Plant-insect interactions in fragmented landscapes. Annu. Rev. Entomol., 49, 405430.
  • Tscharntke, T. & Kruess, A. (1999). Habitat fragmentation and biological control. In: Theoretical Approaches to Biological Control (eds Hawkins, B.A. & Cornell, H.V.). Cambridge University Press, Cambridge, UK, pp. 190205.
  • Tscharntke, T., Steffan-Dewenter, I., Kruess, A. & Thies, C. (2002a). Contribution of small habitat fragments to conservation of insect communities of grassland-cropland landscapes. Ecol. Appl., 12, 354363.
  • Tscharntke, T., Steffan-Dewenter, I., Kruess, A. & Thies, C. (2002b). Characteristics of insect populations on habitat fragments – a mini review. Ecol. Res., 17, 229239.
  • Tscharntke, T., Rand, T. & Bianchi, F. (2005). The landscape context of trophic interactions: insect spillover across the crop–noncrop interface. Ann. Zool. Fenn. (in press).
  • Tylianakis, J.M., Didham, R.K. & Wratten, S.D. (2004). Improved fitness of aphid parasitoids receiving resource subsidies. Ecology, 85, 658666.
  • Vandermeer, J. & Perfecto, I. (1995). Breakfast of Biodiversity. The Truth about Rainforest Destruction. A Food First Book, The Institute for Food and Development Policy, Oakland, California, USA.
  • Vandermeer, J. & Perfecto, I. (1997). The agroecosystems: a need for the conservation biologist's lens. Conserv. Biol., 11, 591592.
  • Vandermeer, J., van Noordwijk, M., Anderson, J., Ong, C. & Perfecto, I. (1998). Global change and multi-species agroecosystems: concepts and issues. Agric. Ecosyst. Environ., 67, 122.
  • Vandermeer, J., Lawrence, D., Symstad, A. & Hobbie, S. (2002). Effects of biodiversity on ecosystem functioning in managed ecosystems. In: Biodiversity and Ecosystem Functioning (eds Loreau, M., Naeem, S. & Inchausti, P.). Oxford University Press, Oxford, UK, pp. 157168.
  • Wardle, D.A. & van der Putten, W.H. (2002). Biodiversity, ecosystem functioning and above-ground-below-ground linkages. In: Biodiversity and Ecosystem Functioning (eds Loreau, M., Naeem, S. & Inchausti, P.). Oxford University Press, Oxford, UK, pp. 157168.
  • Wardle, D.A., Huston, M.A., Grime, J.P., Berendse, F., Garnier, F., Lauenroth, W.K. et al. (2000). Biodiversity and ecosystem function: an issue in ecology. Bull. Ecol. Soc. Am., 7, 235239.
  • Weibull, A.C. & Östman, Ö. (2003). Species composition in agroecosystems: the effect of landscape, habitat, and farm management. Basic Appl. Ecol., 4, 349361.
  • Westphal, C., Steffan-Dewenter, I. & Tscharntke, T. (2003). Mass-flowering crops enhance pollinator densities at a landscape scale. Ecol. Lett., 6, 961965.
  • Wilby, A. & Thomas, M.B. (2002). Natural enemy diversity and pest control: patterns of pest emergence with agricultural intensification. Ecol. Lett., 5, 353360.
  • Williams, P. (2005). Does specialisation explain rarity and decline among British bumblebees? A response to Goulson et al. Biol. Conserv., 122, 3343.
  • Wunderle, J.M. (1998). Avian resource use in Dominican shade coffee plantation. Wilson Ornithol. Soc., 110, 271281.
  • Zavaleta, E.S. & Hulvey, K.B. (2004). Realistic species losses disproportionally reduce grassland resistance to biological invaders. Science, 306, 11751177.