1 / 23

Biological Valuation Map

Biological Valuation Map. Short presentation of the Biological Valuation Map Evaluation criteria A few lessons from the BVM BVM and international instruments Desiré Paelinckx – Hans Bosch – Peter Adriaens. What is the BVM ?. What is the BVM ?. A fixed set of legend units for: land cover

marva
Download Presentation

Biological Valuation Map

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Biological Valuation Map • Short presentation of the Biological Valuation Map • Evaluation criteria • A few lessons from the BVM • BVM and international instruments Desiré Paelinckx – Hans Bosch – Peter Adriaens

  2. What is the BVM ?

  3. What is the BVM ? A fixed set of legend units for: • land cover (woods, arable land, pasture, urban areas….) • vegetation (wet grassland, wet heath.…) • landscapeelements (tree rows, ponds, sunken roads.…) • A uniform survey of land cover and a biological evaluation of the Flemish Region • An ecological description of the Flemish Region

  4. field survey Data from literary study: - municipal nature development schemes - land consolidation studies - scientific journals - ... Digital data: - topographical map NGI - aerial photos OC-Gis Vl. - soil map NGI - bvm version 1 - thematic studies - species databases -... • External data: • nature societies • - nature reserve managers • - foresters • - volunteers • -... BVM version 2

  5. BVM versions • 1978 - 1996: BVM, version 1 Global landscape ecological situation • 1997 - 2006:BVM, version 2 More accurate and detailed instrument that can be used at parcel level

  6. Biological Valuation Map • Short presentation of the Biological Valuation Map • Evaluation criteria • A few lessons from the BVM • BVM and international instruments

  7. Evaluation criteria best professional judgements, with the following criteria: • Rareness of the habitat • General biological quality • flora (and fauna) diversity • Potential occurrence of rare flora (and fauna) • Importance of the habitat as a refuge for species • Global vulnerability to overfertilization, acidification,.... • Replaceability: time required to create the habitat and to evolve to a certain “ecological balance”

  8. biologically • very valuable (z) • valuable (w) • less valuable (m) • mixed valuations : • mw • wz • mz • mwz • red shading : important fauna elements Evaluation:each habitat has its own fixed valuation • Mixed valuations for complexes. E.g. hp* (w) + kn (z) becomes: (wz) • With well-reasoned arguments it is allowed to deviate from these fixed valuations

  9. Shading because of fauna

  10. Fauna: Fauna (red shading), systematic method, good frame of reference • Red List species of mammals, breeding birds, amphibia and reptiles, fishes, dragonflies and butterflies • Wintering waterfowl: 5% standard Spined loach gadwalls, wigeons etc Water rail Badger

  11. Biological Valuation Map • Short presentation of the Biological Valuation Map • Evaluation criteria • A few lessons from the BVM • BVM and international instruments

  12. The purpose requires a very strict method Outlining the different steps accurately What is the target exactly? How to process, interpret, and present data? What is the best method for gathering information? What basic information must be gathered?

  13. self-criticism

  14. Shortcomings of the BVM version 1 they had been warned !!

  15. Problems with the BVM originate from • uncertainties in legend units • uniform mapping remains a critical issue  several joint excursions per year • evaluation • period of time

  16. Shortcomings of the BVM • lack of description of the horizontal relations between units and areas • lack of a clear connection between the abiotic environment and the mapping units

  17. Ecological relations or vulnerabilities cannot be inferred directly

  18. Time frame: crucial for grasslands and forests with springtime flora if the mapping units become more detailed but the survey cannot be performed in an optimal fashion (e.g. at the right moment), the accuracy that seems to be created is misleading detail mapping / scale mapping / period and time available balance

  19. Biological Valuation Map • Short presentation of the Biological Valuation Map • Evaluation criteria • A few lessons from the BVM • BVM and international instruments

  20. BVM & Natura2000 • Ideal for defining and making a first assessment of habitat types • Difficulties: • Restrictions typical of the BVM • Restrictions typical of the conversion of the BVM into habitats

  21. Restrictions typical of the conversion of the BVM into habitats • A number of BVM mapping units are used both for habitat and non-habitat  possible habitat • A number of BVM mapping units are used for different habitats  habitat 1, habitat 2, … • Some habitats cannot be inferred from the BVM  not in the derived database • Others are difficult to infer as they are only a minor part of the mapping unit they belong to  habitat to be checked

  22. Manual checking of the automatic conversion of existing BVM

  23. Habitat key for Flanders • What:further development of habitat sheets for field surveys, with clearer demarcation of habitat, less-developed habitat(new in 2004),and absence of habitat • Target: identifying the correct N2000 habitat type and estimating its percentage in the field during BVM mapping

More Related