Part 1 Habitat Directive Annex 1 habitat types Part 2 Habitat Directive Annex 2 marine mammals Part 3 Habitat Directive Annex 2 nonmarine mammals Part 4 Integration ID: 394733
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FOUR PARTS Part 1: Habitat Directive, Annex 1: habitat types Part 2: Habitat Directive, Annex 2: marine mammals Part 3: Habitat Directive, Annex 2: non-marine mammals Part 4: Integration
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
REPORTDegraer, S., U. Braeckman, J. Haelters, K. Hostens, T. Jacques, F. Kerckhof, B. Merckx, M. Rabaut, E. Stienen, G. Van Hoey, V. Van Lancker & M. Vincx (2009). Studie betreffende het opstellen van een lijst van potentiële Habitatrichtlijngebieden in het Belgische deel van de Noordzee. Final report by order of FSP Environment, Marine Environment. 93 pp.
20 to 60 % important habitat
assigned
as N2000 areaSlide2
Habitat types Annex I, HA1110
RATIONALE
HA1110 = structurally and functionally coherent unit of sandbank tops and associated gullies
Delineating
24
sandbanks
based on DTM and BPI (= basic building blocks)
Differentiation 4 biotopes:Habitat suitabilityBiological valueSurface area
Differentiation sandbanks:(per biotope)Biological valueDensity macrobenthosNumber of biotopesShare in surface area
Scenario testingPreferential & additional biotope4 scenario’s
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSSlide3
24
sandbanks
Habitat types Annex I, HA1110DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSSlide4
Habitat types Annex I, HA1110
RATIONALE
HA1110 = structurally and functionally coherent unit of sandbank tops and associated gullies
Delineating
24
sandbanks
based on DTM and BPI (= basic building blocks)
Differentiation 4 biotopes:Habitat suitabilityBiological valueSurface area
Differentiation sandbanks:(per biotope)Biological valueDensity macrobenthosNumber of biotopesShare in surface area
Scenario testingPreferential & additional biotope4 scenario’s
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSSlide5
Macoma balthicacommunity
Abra alba
community
Nephtys cirrosa
community
Ophelia limacina
community
Increasing sediment mud content
Increasing
(
median) grain size
Degraer et al., 2003
Van Hoey et al., 2004
Habitat types
Annex
I,
HA1110 – 4 biotopes
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSSlide6
Habitat types
Annex I, HA1110 – 4 biotopes
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSMacrobenthic densitySpecies richness
Abra
alba
biotope
Abra
alba
biotopeCoastal and near coastal areaSlide7
Habitat types Annex I, HA1110
RATIONALE
HA1110 = structurally and functionally coherent unit of sandbank tops and associated gullies
Delineating
24
sandbanks
based on DTM and BPI (= basic building blocks)
Differentiation 4 biotopes:Habitat suitabilityBiological valueSurface area
Differentiation sandbanks:(per biotope)Biological valueDensity macrobenthosNumber of biotopesShare in surface area
Scenario testingPreferential & additional biotope4 scenario’s
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSSlide8
24
sandbanksX4 biotopes
Habitat types Annex
I,
HA1110 – 4 biotopes
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Abra
alba
biotope
Ranking
of sandbanksSlide9
Habitat types Annex I, HA1110
RATIONALE
HA1110 = structurally and functionally coherent unit of sandbank tops and associated gullies
Delineating
24
sandbanks
based on DTM and BPI (= basic building blocks)
Differentiation 4 biotopes:Habitat suitabilityBiological valueSurface area
Differentiation sandbanks:(per biotope)Biological valueDensity macrobenthosNumber of biotopesShare in surface area
Scenario testingPreferential & additional biotope4 scenario’s
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSSlide10
Scenario 1
5%
preferential biotopeScenario 210% preferential biotope
Scenario 3
15%
preferential
biotope
Scenario 4
40%
preferential biotope
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Habitat types Annex I, HA1110Slide11
RATIONALEEcological importance ?
Two candidates HA1170Lanice conchilega aggregationsGravel
bedsActual threats?Bottom disturbing activities
HD as instrument for protection?
HA1170
HA1170
associated
with HA1110
« special feature » under HA1110
Lanice conchilega aggregationsMaxEntAggregations: min. 500 ind./m²Gravel bedsMaximum data exploration
Min. 20% gravel; > 2 mm
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Habitat types
Annex
I,
HA1110 (
HA1170
)Slide12
Lanice
conchilega
aggregations
(~
Abra alba
biotope)
Gravel
bedsDELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Habitat types Annex I, HA1110 (HA1170)Slide13
RATIONALEPotential target species in BDNZBottlenose
dolphinHarbour porpoiseCommon sealGrey seal
Available dataData RBINSData INBOMapping
At
species
level
Evaluation
Population size
Conservation statusInternational importance
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Species
Annex II, marine mammalsSlide14
Harbour
porpoise(March-April)
April 2008: 2700 ind. (~ 2% NS population)Extinct
Bottlenose
dolphin
(
Recent
observations)
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Species Annex II, marine mammalsSlide15
Common seal
Grey seal:
Only anecdotic observationsDELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Species
Annex
II, marine
mammals
CONCLUSION MARINE MAMMALS
None of the Annex II species allow identifying areas of community importance (cf. internationally low numbers and/or no concentration areas).Slide16
Potential target species in BPNSSea lamprey, River lamprey, Sturgeon, Twait shad, shad, Houting, Salmon
Loggerhead sea turtle, Green sea turtle
RATIONALEEvaluation potential target species
Sea
lamprey
, River
lamprey
, Sturgeon, Twait shad, Shad
Available dataData ILVO(Data RBINS, Data Natuurpunt)
EvaluationPopulation sizeConservation statusRelative importance BPNS
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Species
Annex II, non-marine mammalsSlide17
Twait
shadRiver lampreyDELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Species
Annex
II, non-marine
mammalsSlide18
CONCLUSION NON-MARINE MAMMALSIt is impossible to identify concentration areas, nor is it possible to take site-specific conservation measures.The importance of coastal zone for migrating fish up and down the Scheldt estuary however is acknowledged.
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
Species Annex II, non-marine mammalsSlide19
FOUR PARTS Part 1: Habitat Directive, Annex 1: habitat types Part 2: Habitat Directive, Annex 2: marine mammals Part 3: Habitat Directive, Annex 2: non-marine mammals Part 4: Integration
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS
REPORTDegraer, S., U. Braeckman, J. Haelters, K. Hostens, T. Jacques, F. Kerckhof, B. Merckx, M. Rabaut, E. Stienen, G. Van Hoey, V. Van Lancker & M. Vincx (2009). Studie betreffende het opstellen van een lijst van potentiële Habitatrichtlijngebieden in het Belgische deel van de Noordzee. Final report by order of FSP Environment, Marine Environment. 93 pp.
20 to 60 % important habitat
assigned
as N2000 areaSlide20
X
XX
XX
X
X
X
X
X
X
X
X
X
X
X
Integration
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNSSlide21
Facts
29%
8%
19%
28%
46%
35%
38%
DELINEATING HABITAT DIRECTIVE AREAS IN THE BPNS