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The importance and causes of farmland heterogeneity William Sutherland (Zoology, Cambridge)

The importance and causes of farmland heterogeneity William Sutherland (Zoology, Cambridge).

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The importance and causes of farmland heterogeneity William Sutherland (Zoology, Cambridge)

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  1. The importance and causes of farmland heterogeneity William Sutherland (Zoology, Cambridge) With: Eric Audsley (Cranfield), Alison Bailey (Reading), Ira Cooke (Cambridge),Rob Freckleton (Sheffield), Anil Graves (Cranfield), Elizabeth Mattison (Reading), Joe Morris (Cranfield), Simon Queenborough (Sheffield), Daniel Sandars (Cranfield), Gavin Siriwardena (BTO), Phil Strachan (Primeag), Paul Trawick (Cranfield), Andrew Watkinson (UEA)

  2. Conceptual framework Climate, location, soil type etc. Social, economic, legislative and technical changes Profitability of different farmer actions Physical structure e.g. hedges Changes in farm management Social aspects Bird and mammal populations Weed abundance

  3. MANAGE LAND AS YOU SEE FIT Lifestyle Management complexity Appearance of land Land-based income Risk Autonomy Time off from core farming activity ( no. days year-1) Recreational shooting (no. days season-1) Length of hedge (m) Woodland area (ha) Skylark plots (no.) FBI bird species observed (no.) Skylarks seen (no.) Tall weeds (no. m-2) Other weeds (no. m-2) No. different crop types managed No. different agri-environment options managed Absolute deviation in land-based income (£) £ year-1 from cropping + subsidy + land-based diversification less variable and fixed costs No. different regulatory constraint sets adhered to • Approach: • Collect data on farmers’ land-use objectives using Multi-Attribute Utility Theory to describe preferences and trade-offs between multiple objectives Hierarchy of Objectives Overall objective (decision context) Objectives Measures FBI = Farmland Bird Index

  4. Mean raw weights n = 47; coeff. of var. = std. dev./mean

  5. Temporal changes...

  6. Breeding Bird Monitoring JNCC/BTO/RSPB Breeding Bird Survey (BBS) 880 squares random lowland arable squares in 2007 Bird abundance (31 species) Habitat data: %landscape cover (e.g. arable, wood), boundary features, cropping 1 km 25m 100m NO. OF SPECIES: Most important habitat variable sets Landscapes Field boundaries Cropping Controlling for… Geographical area only 17 9 5 18 5 21 Other variable types* * >1 variable set equally important for some species

  7. Effect of set-aside on the cropping landscape

  8. How will set-aside loss affect bird populations? Relative change Species

  9. Slide 2: Interest influence framework in terms of the question, which stakeholder have influence in and interest over farmland bird populations in the UK. In many respects this boils down to consideration of which stakeholders have interest in and influence over agricultural land in the UK….. Subject Key Players Crowd Context setters

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