Woodland Key Habitat WKH High risk in Latvia Presentation by: - - PowerPoint PPT Presentation

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Woodland Key Habitat WKH High risk in Latvia Presentation by: - - PowerPoint PPT Presentation

Oct 14, 2023 369 likes •558 views

Woodland Key Habitat WKH High risk in Latvia Presentation by: Peter Andreasson, M.Sc in Forestry and Nature Conservation Biology WHAT IS A WKH? Definition : An area that contains habitat specialists that cannot sustainably survive in stands

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Woodland Key Habitat – WKH

High risk in Latvia

Presentation by: Peter Andreasson, M.Sc in Forestry and Nature Conservation Biology

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WHAT IS A WKH? Definition: An area that contains habitat specialists that cannot sustainably survive in

stands managed for timber production. A well-founded expectation that a habitat specialist exists is a sufficient criterion for designating an area as a WKH.

Not likely: Likely:

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IMPORTANT FEATURES: Substrate: Old trees; hollow trees; dead wood standing or laying in continuity; periodically flooded; micro climate etc., etc.

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IMPORTANT FEATURES: Structures: uneven age structure; mix of different tree species; canopy coverage; exposition; topography; hydrology; soil conditions etc. etc.

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IMPORTANT FEATURES: Disturbance regimes, large-small scale: fire; windfalls; competition; insect break outs; gap dynamic; landuse (human); etc. etc.

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RED LISTED SPECIES Why are some species red listed? Different organisms –Different needs – Different threats Mammals-Birds Plants-Insects Mosses-Lichens-Mushroms (polypores, mykorrhiza)

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DIFFERENT BIOTOPS FOR DIFFERENT SPECIES

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DIFFERENT BIOTOPS FOR DIFFERENT SPECIES

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DIFFERENT BIOTOPS FOR DIFFERENT SPECIES

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DIFFERENT BIOTOPS FOR DIFFERENT SPECIES

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DIFFERENT BIOTOPS FOR DIFFERENT SPECIES

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DIFFERENT BIOTOPS FOR DIFFERENT SPECIES

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DIFFERENT BIOTOPS FOR DIFFERENT SPECIES

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PROPER WKH-TREATMENT

No treatment - Natural development Careful measures - Enhance nature values

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COMMONLY USED METHODOLOGY Data base search – Map search Field visits: signal-/indicatorspecies + substrate and structures = confirm/not confirm WKH

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WKH-SITUATION IN NEIGHBOUR COUNTRIES:

Country

  • No. of sites

Mean size of WKHs (ha) Total area of WKHs (ha) WKHs % Sweden 81 900 4.63 379 200 1.3 Finland 111 357 0.67 128 371 0.6 Norway 28 630 1.05 30 087 1.5 Latvia 31 000 2.10 51 000 1.7 Estonia 5 455 2.90 15 852 0.7 Lithuania 5 609 3.21 18 000 1.2 SOURCE: ”Woodland key habitats in northern Europe: concepts, inventory and protection” Jonna Timonena*, Juha Siitonenb, Lena Gustafssonc, Janne S. Kotiahode, Jogeir N. Stoklandf, Anne Sverdrup-Thygesong & Mikko Mönkkönena

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JURIDICAL ASPECTS ON WKH’S Market solutions FSC/PEFC