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How do sheep affect plant communities and arthropod populations in temperate grasslands?

  • A. Scohier (a1) and B. Dumont (a1)
Abstract

Grasslands being used in sheep farming systems are managed under a variety of agricultural production, recreational and conservational objectives. Although sheep grazing is rarely considered the best method for delivering conservation objectives in seminatural temperate grasslands, the literature does not provide unequivocal evidence on the impact of sheep grazing on pasture biodiversity. Our aim was therefore to review evidence of the impacts of stocking rate, grazing period and soil fertility on plant communities and arthropod populations in both mesotrophic grasslands typical of agriculturally improved areas and in native plant communities. We therefore conducted a literature search of articles published up to the end of the year 2010 using ‘sheep’ and ‘grazing’ as keywords, together with variables describing grassland management, plant community structure or arthropod taxa. The filtering process led to the selection of 48 articles, with 42 included in the stocking rate dataset, 9 in the grazing period dataset and 10 in the soil fertility dataset. The meta-analysis did not reveal any significant trends for plant species richness or plant community evenness along a wide stocking rate gradient. However, we found frequent shifts in functional groups or plant species abundance that could be explained by the functional properties of the plants in the community. The meta-analysis confirmed that increasing soil fertility decreased plant species richness. Despite the very limited dataset, plant species richness was significantly greater in autumn-grazed pastures than in ungrazed areas, which suggests that choosing an appropriate grazing period would be a promising option for preserving biodiversity in sheep farming systems. Qualitative review indicated that low grazing intensity had positive effects on Orthoptera, Hemiptera (especially phytophagous Auchenorrhyncha) and, despite a diverse range of feeding strategies, for the species richness of Coleoptera. Lepidoptera, which were favoured by more abundant flowering plants, also benefited from low grazing intensities. Spider abundance and species richness were higher in ungrazed than in grazed pastures. In contrast, there are insufficient published studies to draw any firm conclusions on the benefits of late grazing or stopping fertilization on insect diversity, and no grounds for including any of this information in decision support tools at this stage.

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Corresponding author
E-mail: bertrand.dumont@clermont.inra.fr
References
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Bakker, ES, Ritchie, ME, Olff, H, Milchunas, DG, Knops, JMH 2006. Herbivore impact on grassland plant diversity depends on habitat productivity and herbivore size. Ecology Letters 9, 780788.
Bakker, JP, Berendse, F 1999. Constraints in the restoration of ecological diversity in grassland and heathland communities. Trends in Ecology and Evolution 14, 6368.
Barataud, J 2005. Orthoptères et milieux littoraux. Influence de la gestion des habitats herbacés sur les ressources trophiques et enjeux pour la biodiversité. Rapport Réserve Naturelle de Moëze-Oléron, 50 pp.
Blight, O, Fadda, S, Orgeas, J, Ponel, P, Buisson, E, Dutoit, T 2011. Using stone cover patches and grazing exclusion to restore ground-active beetle communities in a degraded pseudo-steppe. Journal of Insect Conservation 15, 561572.
Bockstaller, C, Guichard, L, Makowski, D, Aveline, A, Girardin, P, Plantureux, S 2008. Agri-environmental indicators to assess cropping and farming systems. A methodological review. Agronomy for Sustainable Development 28, 129139.
Bourn, NAD, Thomas, JA 2002. The challenge of conserving grassland insects at the margins of their range in Europe. Biological Conservation 104, 285292.
Bouchard, V, Tessier, M, Digaire, F, Vivier, JP, Valery, L, Gloaguen, JC, Lefeuvre, JC 2003. Sheep grazing as management tool in Western European saltmarshes. C. R. Biologies 326 (Suppl 1), S148S157.
Bouwman, AF, Van der Hoek, KW, Eickhout, B, Soenario, I 2005. Exploring changes in world ruminant production systems. Agricultural Systems 84, 121153.
Branson, DH, Haferkamp, MR 2003. Effects of sheep grazing on grasshopper population dynamics and rangeland vegetation. Research Update for Fort Keogh Livestock and Range Research Laboratory, pp. 19–20.
Bullock, JM, Franklin, J, Stevenson, MJ, Silvertown, J, Coulson, SJ, Gregory, SJ, Tofts, R 2001. A plant trait analysis of responses to grazing in a long-term experiment. Journal of Applied Ecology 38, 253267.
Cadotte, MW, Carscadden, K, Mirotchnick, N 2011. Beyond species: functional diversity and the maintenance of ecological processes and services. Journal of Applied Ecology 48, 10791087.
Campbell, WB, Freeman, DC, Emlen, JM, López Ortiz, S 2010. Correlations between plant phylogenic and functional diversity in a high altitude cold salt desert depend on sheep grazing season: implications for range recovery. Ecological Indicators 10, 676686.
Carvell, C 2002. Habitat use and conservation of bumblebees (Bombus spp.) under different grassland management regimes. Biological Conservation 103, 3349.
Collinge, SK, Prudic, KL, Oliver, JC 2003. Effects of local habitat characteristics and landscape context on grassland butterfly diversity. Conservation Biology 17, 178187.
De Bello, F, Lepš, J, Sebastià, MT 2006. Variations in species and functional plant diversity along climatic and grazing gradients. Ecography 29, 801810.
Del Pozo, A, Ovalle, C, Casado, MA, Acosta, B, de Miguel, JM 2006. Effects of grazing intensity in grasslands of the Espinal of central Chile. Journal of Vegetation Science 17, 791798.
Demment, MW, Greenwood, GB 1988. Forage ingestion: effects of sward characteristics and body size. Journal of Animal Science 66, 23802392.
Dennis, P, Young, MR, Howard, CL, Gordon, IJ 1997. The response of epigeal beetles (Col: Carabidae, Staphylinidae) to varied grazing regimes on upland Nardus stricta grasslands. Journal of Applied Ecology 34, 433443.
Dennis, P, Young, MR, Gordon, IJ 1998. Distribution and abundance of small insects and arachnids in relation to structural heterogeneity of grazed, indigenous grasslands. Ecological Entomology 23, 253264.
Dennis, P, Young, MR, Bentley, C 2001. The effects of varied grazing management on epigeal spiders, harvestmen and pseudoscorpions of Nardus stricta grassland in upland Scotland. Agriculture, Ecosystems and Environment 86, 3957.
Dennis, P, Doering, J, Stockan, JA, Jones, JR, Rees, ME, Vale, JE, Sibbald, AR 2004. Consequences for biodiversity of reducing inputs to upland temperate pastures: effects on beetles (Coleoptera) of cessation of nitrogen fertilizer application and reductions in stocking rates of sheep. Grass and Forage Science 59, 121135.
Dennis, P, Skartveit, J, McCracken, DI, Pakeman, RJ, Beaton, K, Kunaver, A, Evans, DM 2008. The effects of livestock grazing on foliar arthropods associated with bird diet in upland grasslands of Scotland. Journal of Applied Ecology 45, 279287.
Dorrough, J, Ash, J, McIntyre, S 2004. Plant responses to livestock grazing frequency in an Australian temperate grassland. Ecography 27, 798810.
Dumont, B, Petit, M, D'hour, P 1995. Choice of sheep and cattle between vegetative and reproductive cocksfoot patches. Applied Animal Behaviour Science 43, 115.
Dumont, B, Farruggia, A, Garel, JP, Bachelard, P, Boitier, E, Frain, M 2009. How does grazing intensity influence the diversity of plants and insects in a species-rich upland grassland on basalt soils? Grass and Forage Science 64, 92105.
Dumont, B, Carrère, P, Ginane, C, Farruggia, A, Lanore, L, Tardif, A, Decuq, F, Darsonville, O, Louault, F 2011. Plant–herbivore interactions affect the initial direction of community changes in an ecosystem manipulation experiment. Basic and Applied Ecology 12, 187194.
Duru, M, Cruz, P, Al Haj Khaled, R, Ducourtieux, C, Theau, JP 2008. Relevance of plant functional types based on leaf dry matter content for assessing digestibility of native grass species and species-rich grassland communities in spring. Agronomy Journal 100, 16221630.
Dutoit, T, Alard, D, Lambert, J, Frileux, PN 1995. Biodiversité et valeur agronomique des pelouses calcicoles: effets du pâturage ovin. Fourrages 142, 145158.
Eddy, DA 2002. Managing native grassland: a guide to management for conservation, production and land protection. WWF Australia, Sydney, NSW.
Emanuelsson, U 2008. Semi-natural grasslands in Europe today. Grassland Science in Europe 13, 38.
Farruggia, A, Theau, JP, Louault, F, Dumont, B 2008. Comparaison d'outils de caractérisation de la flore pour diagnostiquer l'effet des modes de gestion sur les dynamiques de végétation des prairies permanents. Fourrages 195, 301314.
Fayolle, A 2008. Structure des communautés de plantes herbacées sur les Grands Causses: stratégies fonctionnelles des espèces et interactions interspécifiques. Ph.D Sup Agro Montpellier, 284 pp.
Fenner, M, Palmer, L 1998. Grassland management to promote diversity: creation of a patchy sward by mowing and fertilizer regimes. Field Studies 9, 313324.
Fothergill, M, Davies, DA, Morgan, CT, Jones, S, Rees, E 2002. Changes in floristic diversity associated with reduction of fertilizer inputs and grazing to upland pasture. Grassland Science in Europe 7, 784785.
Garcia, F, Carrère, P, Soussana, JF, Baumont, R 2003. The ability of sheep at different stocking rates to maintain the quality and quantity of their diet during the grazing season. Journal of Agricultural Science (Cambridge) 140, 113124.
Gibson, CWD, Brown, VK, Losito, L, McGavin, GC 1992a. The response of invertebrate assemblies to grazing. Ecography 15, 166176.
Gibson, CWD, Hambler, C, Brown, VK 1992b. Changes in spider (Araneae) assemblages in relation to succession and grazing management. Journal of Applied Ecology 29, 132142.
Grime, JP 1979. Plant strategies and vegetation processes. John Wiley & Sons, Chichester, UK.
Gross, N, Bloor, JMG, Louault, F, Maire, V, Soussana, JF 2009. Effects of land-use change on productivity depend on small-scale plant species diversity. Basic and Applied Ecology 10, 687696.
Hodgson, J, Forbes, TDA, Armstrong, RH, Beattie, MM, Hunter, EA 1991. Comparative studies of the ingestive behaviour and herbage intake of sheep and cattle grazing indigenous hill plant communities. Journal of Applied Ecology 28, 205227.
Hofmann, TA, Mason, CF 2006. Importance of management on the distribution and abundance of Staphylinidae (Insecta: Coleoptera) on coastal grazing marshes. Agriculture, Ecosystems and Environment 114, 397406.
Hulme, PD, Pakeman, RJ, Torvell, L, Fisher, JM, Gordon, IJ 1999. The effects of controlled sheep grazing on the dynamics of upland Agrostis-Festuca grassland. Journal of Applied Ecology 36, 886900.
Huston, MA 1994. Biological diversity. The coexistence of species on changing landscapes. Cambridge University Press, Cambridge, UK.
Hutchinson, KJ, King, KL 1980. The effects of sheep stocking level on invertebrate abundance, biomass and energy utilization in a temperate, sown grassland. Journal of Applied Ecology 17, 369387.
Janssens, F, Peeters, A, Tallowin, JRB, Bakker, JP, Bekker, RM, Fillat, F, Oomes, MJM 1998. Relationship between soil chemical factors and grassland diversity. Plant and Soil 202, 6978.
Keiller, SW, Buse, A, Cherrett, JM 1995. Effects of sheep grazing on upland arthropods in Snowdonia & Mid-Wales. CCW Contract Science Report No. 120: FC/ 73-01-14, 77pp.
King, KL, Hutchinson, KJ 1976. The effects of sheep stocking intensity on the abundance and distribution of mesofauna in pastures. Journal of Applied Ecology 13, 4155.
Klimek, S, Richter Gen. Kemmermann, A, Hofmann, M, Isselstein, J 2007. Plant species richness and composition in managed grasslands: the relative importance of field management and environmental factors. Biological Conservation 134, 559570.
Krahulec, F, Skálová, H, Herben, T, Hadincová, V, Wildová, R, Pechácková, S 2001. Vegetation changes following sheep grazing in abandoned mountain meadows. Applied Vegetation Science 4, 97102.
Li, C, Hao, X, Zhao, M, Han, G, Willms, WD 2008. Influence of historic sheep grazing on vegetation and soil properties of a desert steppe in inner mongolia. Agriculture, Ecosystems and Environment 128, 109116.
Littlewood, NA 2008. Grazing impacts on moth diversity and abundance on a Scottish upland estate. Insect Conservation Diversity 1, 151160.
Louault, F, Pillar, VD, Aufrère, J, Garnier, E, Soussana, JF 2005. Plant traits and functional types in response to reduced disturbance in a semi-natural grassland. Journal of Vegetation Science 16, 151160.
Lunt, ID 2005. Technical Report 18. Effects of stock grazing on biodiversity values in temperate native grasslands and grassy woodlands in SE Australia: a literature review. Environment ACT, Canberra.
Maczey, N 2004. The Auchenorrhyncha communities of chalk grassland in Southern England. PhD thesis, University of Koblenz, Germany.
Marini, L, Fontana, P, Scotton, M, Klimek, S 2008. Vascular plant and Orthoptera diversity in relation to grassland management and landscape composition in the European Alps. Journal of Applied Ecology 45, 361370.
Marriott, CA, Bolton, GR, Barthram, GT, Fisher, JM, Hood, K 2002. Early changes in species composition of upland sown grassland under extensive grazing management. Applied Vegetation Science 5, 8798.
Marriott, CA, Fothergill, M, Jeangros, B, Scotton, M, Louault, F 2004. Long-term impacts of extensification of grassland management on biodiversity and productivity in upland areas. A review. Agronomie 24, 447462.
Marriott, CA, Hood, K, Fisher, JM, Pakeman, RJ 2009. Long-term impacts of extensive grazing and abandonment on the species composition, richness, diversity and productivity of agricultural grassland. Agriculture, Ecosystems and Environment 134, 190200.
Mayer, R, Kaufmann, R, Vorhauser, K, Erschbamer, B 2009. Effects of grazing exclusion on species composition in high-altitude grasslands of the Central Alps. Basic and Applied Ecology 10, 447455.
Meisser, M, Chatelain, C 2010. Rotational grazing with sheep on a high altitude pasture: impact on the vegetation. Recherche Agronomique Suisse 1, 216221.
Milchunas, DG, Sala, OE, Lauenroth, WK 1988. A generalized model of the effects of grazing by large herbivores on grassland community structure. The American Naturalist 132, 87106.
Milotić, T, Erfanzadeh, R, Pétillon, J, Maelfait, JP, Hoffmann, M 2010. Short-term impact of grazing by sheep on vegetation dynamics in a newly created salt-marsh site. Grass and Forage Science 65, 121132.
Moog, D, Poschlod, P, Kahmen, S, Schreiber, KF 2002. Comparison of species composition between different grassland management treatments after 25 years. Applied Vegetation Science 5, 99106.
Morón-Ríos, A, Rodríguez, MA, Pérez-Camacho, L, Rebollo, S 2010. Effects of seasonal grazing and precipitation regime on the soil macroinvertebrates of a Mediterranean old-field. European Journal of Soil Biology 46, 9196.
Morris, MG 2000. The effects of structure and its dynamics on the ecology and conservation of arthropods in British grasslands. Biological Conservation 95, 129142.
Morris, MG, Clarke, RT, Rispin, WE 2005. The success of a rotational grazing system in conserving the diversity of chalk grassland Auchenorrhyncha. Journal of Insect Conservation 9, 363374.
Norton, DA, Espie, PR, Murray, W, Murray, J 2006. Influence of pastoral management on plant biodiversity in a depleted short tussock grassland, Mackenzie Basin. New Zealand Journal of Ecology 30, 335344.
Öckinger, E, Eriksson, AK, Smith, HG 2006. Effects of grassland abandonment, restoration and management on butterflies and vascular plants. Biological Conservation 133, 291300.
Olff, H, Ritchie, ME 1998. Effects of herbivores on grassland plant diversity. Trends in Ecology & Evolution 13, 261265.
Oliver, I, Garden, D, Greenslade, PJ, Haller, B, Rodgers, D, Seeman, O, Johnston, B 2005. Effects of fertiliser and grazing on the arthropod communities of a native grassland in south-eastern Australia. Agriculture, Ecosystems and Environment 109, 323334.
Osem, Y, Perevolotsky, A, Kigel, J 2002. Grazing effect of diversity of annual plant communities in a semi-arid rangeland: interactions with small-scale spatial and temporal variation in primary productivity. Journal of Ecology 90, 936946.
Ostermann, OP 1998. The need for management of nature conservation sites designated under Natura 2000. Journal of Applied Ecology 35, 968973.
Parfitt, RL, Yeates, GW, Ross, DJ, Schon, NL, Mackay, AD, Wardle, DA 2010. Effect of fertilizer, herbicide and grazing management of pastures on plant and soil communities. Applied Soil Ecology 45, 175186.
Poschlod, P, Bonn, S 1998. Changing dispersal processes in the central European landscape since the last ice age: an explanation for the actual decrease of plant species richness in different habitats? Acta Botanica Neerlandica 47, 2744.
Pöyry, J, Luoto, M, Paukkunen, J, Pykälä, J, Raatikainen, K, Kuussaari, M 2006. Different responses of plants and herbivore insects to a gradient of vegetation height: an indicator of the vertebrate grazing intensity and successional age. Oikos 115, 401412.
Schon, NL, Mackay, AD, Minor, MA, Yeates, GW, Hedley, MJ 2008. Soil fauna in grazed New Zealand hill country pastures at two management intensities. Applied Soil Ecology 40, 218228.
Scimone, M, Rook, AJ, Garel, JP, Sahin, N 2007. Effects of livestock breed and grazing intensity on grazing systems: 3. Effects on diversity of vegetation. Grass and Forage Science 62, 172184.
Sebastià, MT, de Bello, F, Puig, L, Taull, M 2008. Grazing as a factor structuring grasslands in the Pyrenees. Applied Vegetation Science 11, 215222.
Sjödin, NE 2007. Pollinator behavioural responses to grazing intensity. Biodiversity and Conservation 16, 21032121.
Smith, RS, Buckingham, H, Bullard, MJ, Shiel, RS, Younger, A 1996a. The conservation management of mesotrophic (meadow) grassland in northern England. 1. Effects of grazing, cutting date and fertilizer on the vegetation of a traditionally managed sward. Grass and Forage Science 51, 278291.
Smith, RS, Corkhill, P, Shiel, RS, Millward, D 1996b. The conservation management of mesotrophic (meadow) grassland in Northern England. 2. Effects of grazing, cutting date, fertilizer and seed application on the vegetation of an agriculturally improved sward. Grass and Forage Science 51, 292305.
Statistical Analysis System 1999. SAS/STAT guide. SAS Institute Inc., Cary, NC, USA.
Stewart, GB, Pullin, AS 2008. The relative importance of grazing stock type and grazing intensity for conservation of mesotrophic ‘old meadow’ pasture. Journal of Nature Conservation 16, 175185.
Suding, KN, Collins, SL, Gough, L, Clark, C, Cleland, EE, Gross, KL, Milchunas, DG, Pennings, S 2005. Functional- and abundance-based mechanisms explain diversity loss due to N fertilization. Proceedings of the National Academy of Science 102, 43874392.
Tallowin, JRB, Smith, REN, Goodyear, J, Vickery, JA 2005. Spatial and structural uniformity of lowland agricultural grassland in England: a context for low biodiversity. Grass and Forage Science 60, 225236.
Treweek, JR, Watt, TA, Hambler, C 1997. Integration of sheep production and nature conservation: experimental management. Journal of Experimental Management 50, 193210.
Turner, V, Zimmer, H 2007. Long-term ecological grazing project: annual milestone report to Grain & Graze. Technical Report, Department of Sustainability and Environment, Arthur Rylah Institute for Environmental Research, Melbourne.
Vickery, JA, Tallowin, JR, Feber, RE, Asteraki, EJ, Atkinson, PW, Fuller, RJ, Brown, VK 2001. The management of lowland neutral grasslands in Britain: effects of agricultural practices on birds and their food resources. Journal of Applied Ecology 38, 647664.
WallisDeVries, MF, Parkinson, AE, Dulphy, JP, Sayer, M, Diana, E 2007. Effects of livestock breed and grazing intensity on biodiversity and production in grazing systems. 4. Effects on animal diversity. Grass and Forage Science 62, 185197.
Warren, J, Christal, A, Wilson, F 2002. Effects of sowing and management on vegetation succession during grassland habitat restoration. Agriculture, Ecosystems and Environment 93, 393402.
Woodcock, BA, Lawson, CS, Mann, DJ, McDonald, AW 2006. Effects of grazing management on beetle and plant assemblages during the re-creation of a flood-plain meadow. Agriculture Ecosystems and Environment 116, 225234.
Zhou, HK, Tang, YH, Zhao, XQ, Zhou, L 2006. Long-term grazing alters species composition and biomass of a shrub meadow on the Qinghai–Tibet Plateau. Pakistan Journal of Botany 38, 10551069.
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