[PPT] - SRA Study in Kattegat and resund Flemming T. Hansen and Asbjrn PowerPoint Presentation

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SRA Study in Kattegat and Øresund

13/12/2018 1 OSPAR HELCOM TG Ballast

Flemming T. Hansen and Asbjørn Christensen, DTU Aqua Frank Stuer-Lauridsen, LITEHAUZ

SLIDE 2

A-4 Exemptions G7 Risk Assessment Same Risk Area

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Country B Country A Country C Same Risk Area

SLIDE 3

The SRA exemption process

Risk assessment following G7
Species-specific and

environmental matching

SRA natural dispersal
Hydrographic model

(agent based connectivity)

Biological characteristics
Habitat mapping

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SLIDE 4

SRA target species

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85 target species

– 39 HELCOM/OSPAR tool – 7 Danish list – 39 Aquanis

23 species shortlisted

– Biological characteristics

SLIDE 5

Selection criteria

for species to be included in the marine connectivity study
Species with the entire life cycle in the water column
MIS witch are already widely distributed and fully established in the Kattegat

and Øresund region. (e.g. Acartia tonsa, Mya arenaria)

Species with no or very limited salinity tolerance < 10 psu (e.g. Dreissena

bugensis)

Macro algae, macrophytes and highly mobile species

EXCLUDED IF… : => Total of 23 species

SLIDE 6

Target species data

Survival Temperature Min-Max (C ) Pelagic Larvae Duration Min-Max (days) Time to Maturity Min-Max (months) Spawning Start-End (month) Reproduction Temperature Min-Max (C ) Reproduction Salinity Min-Max (psu) Habitat Depth Max (m)

SLIDE 7

23 target species traits data

SLIDE 8

Hydrographic data

which year(s) to include?

NAO = North Atlantic Oscillation!

Definition: “…the seasonal average air pressure difference between stations, e.g. Azores and Reykavik”

2005 2010 2012

SLIDE 9

9

Analysing Natural Dispersal and Connectivity

Same-Risk-Area Assessment Model

PHYSICS Ocean currents Ocean temperature Ocean salinity BIOLOGY Larval duration Spawning season Habitat Tolerance temp Tolerance salinity Vertical distribution

SLIDE 10

Connectivity

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Dispersal probabilities

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Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 1,2,3 1,2,3

/ + / ++

1,2,3

= No 1 Low

= Not registerd

= Low 2 Medimu + = Registrered = high 3 High ++ = Widely distributed

Interpretation of results

Connectivty

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Arcuatula senhousia

Paramter Unit Value PLD (min) days 14 PLD (max) days 55 Generations per year no.s 1 Spawning start month 7 Spawning end month 8 Habitat Substrate type All Habitat Depth m 20

Temp. Min (Adult)

C

Temp. Max (Adult)

C 33 Salinity Min (Adult) PSU 17 Salinity Max (Adult) PSU 35

Temp. Min (Larvae)

C 22.5

Temp. Max (Larvae)

C 30 Salinity Min (Larvae) PSU 17 Salinity Max (Larvae) PSU 30 Parameter

Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø Arcuatula senhousia 3 3

3

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Arcuatula senhousia

Single generation dispersal Muliple generation dispersal

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Asterias amurensis

Paramter Unit Value PLD (min) days 41 PLD (max) days 120 Generations per year no.s 1 Spawning start month 6 Spawning end month 10 Habitat Substrate type All Habitat Depth m 220

Temp. Min (Adult)

C

Temp. Max (Adult)

C 25 Salinity Min (Adult) PSU 18 Salinity Max (Adult) PSU 41

Temp. Min (Larvae)

C 17

Temp. Max (Larvae)

C 20 Salinity Min (Larvae) PSU 18 Salinity Max (Larvae) PSU 41 Parameter

Asterias amurensis Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3 3

3

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Austrominius modestus

Parameter

Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 1 1 1 1

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Bugula neritinatus

Paramter Unit Value PLD (min) days 2 PLD (max) days 0.5 Generations per year no.s 1 Spawning start month 7 Spawning end month 9 Habitat Substrate type Hard Habitat Depth m 10

Temp. Min (Adult)

C

Temp. Max (Adult)

C 25 Salinity Min (Adult) PSU 18 Salinity Max (Adult) PSU 30

Temp. Min (Larvae)

C 12

Temp. Max (Larvae)

C 26 Salinity Min (Larvae) PSU 14 Salinity Max (Larvae) PSU 32 Parameter

Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 1 2

3

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Bugulina simplex

Paramter Unit Value PLD (min) days 1 PLD (max) days 1 Generations per year no.s 1 Spawning start month 7 Spawning end month 9 Habitat Substrate type Hard Habitat Depth m 20

Temp. Min (Adult)

C

Temp. Max (Adult)

C 25 Salinity Min (Adult) PSU 18 Salinity Max (Adult) PSU 40

Temp. Min (Larvae)

C

Temp. Max (Larvae)

C 25 Salinity Min (Larvae) PSU 18 Salinity Max (Larvae) PSU 40 Parameter

Bugulina simplex Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 1 1

3

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Callinectes sapidus

Paramter Unit Value PLD (min) days 31 PLD (max) days 49 Generations per year no.s 1 Spawning start month 5 Spawning end month 8 Habitat Substrate type Mud, Sand Habitat Depth m 36

Temp. Min (Adult)

C 5

Temp. Max (Adult)

C 30 Salinity Min (Adult) PSU 3 Salinity Max (Adult) PSU 40

Temp. Min (Larvae)

C 15

Temp. Max (Larvae)

C 25 Salinity Min (Larvae) PSU 20 Salinity Max (Larvae) PSU 40 Parameter

Callinectes sapidus Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 2 3 + 3

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Crassostrea gigas

Paramter Unit Value PLD (min) days 21 PLD (max) days 28 Generations per year no.s 1 Spawning start month 7 Spawning end month 8 Habitat Substrate type Hard Habitat Depth m 15

Temp. Min (Adult)

C 3

Temp. Max (Adult)

C 35 Salinity Min (Adult) PSU 12 Salinity Max (Adult) PSU 42

Temp. Min (Larvae)

C 18

Temp. Max (Larvae)

C 26 Salinity Min (Larvae) PSU 10 Salinity Max (Larvae) PSU 42 Parameter

Crassostrea gigas Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3 2 ++ 3

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Didemnum vexillum

Paramter Unit Value PLD (min) days 0.5 PLD (max) days 1 Generations per year no.s 1 Spawning start month 7 Spawning end month 9 Habitat Substrate type Hard Habitat Depth m 65

Temp. Min (Adult)

C 2

Temp. Max (Adult)

C 28 Salinity Min (Adult) PSU 18 Salinity Max (Adult) PSU 40

Temp. Min (Larvae)

C 14

Temp. Max (Larvae)

C 20 Salinity Min (Larvae) PSU 18 Salinity Max (Larvae) PSU 40 Parameter

Didemnum vexillum Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3

1

2

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Ensis americanus

Paramter Unit Value PLD (min) days 14 PLD (max) days 21 Generations per year no.s 1 Spawning start month 3 Spawning end month 4 Habitat Substrate type Mud, Sand Habitat Depth m 12

Temp. Min (Adult)

C

Temp. Max (Adult)

C 26 Salinity Min (Adult) PSU 7 Salinity Max (Adult) PSU 32

Temp. Min (Larvae)

C 2

Temp. Max (Larvae)

C 28 Salinity Min (Larvae) PSU 15 Salinity Max (Larvae) PSU 32 Parameter

Ensis americanus Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø ++ 2 3 3

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Eriocheir sinensis

Paramter Unit Value PLD (min) days 30 PLD (max) days 60 Generations per year no.s 0.5 Spawning start month 3 Spawning end month 7 Habitat Substrate type All Habitat Depth m 10

Temp. Min (Adult)

C

Temp. Max (Adult)

C 25 Salinity Min (Adult) PSU Salinity Max (Adult) PSU 30

Temp. Min (Larvae)

C 12

Temp. Max (Larvae)

C 35 Salinity Min (Larvae) PSU 15 Salinity Max (Larvae) PSU 32 Parameter

Eriocheir sinensis Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 2 3 + 3

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Ficopomatus enigmaticus

Paramter Unit Value PLD (min) days 20 PLD (max) days 25 Generations per year no.s 1 Spawning start month 7 Spawning end month 9 Habitat Substrate type hard Habitat Depth m 10

Temp. Min (Adult)

C

Temp. Max (Adult)

C 30 Salinity Min (Adult) PSU 5 Salinity Max (Adult) PSU 40

Temp. Min (Larvae)

C 18

Temp. Max (Larvae)

C 26 Salinity Min (Larvae) PSU 10 Salinity Max (Larvae) PSU 30 Parameter

Ficopomatus enigmaticus Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 2 2 + 2

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Hemigrapsus sanguineus

Paramter Unit Value PLD (min) days 16 PLD (max) days 55 Generations per year no.s 1 Spawning start month 5 Spawning end month 9 Habitat Substrate type Sand, Hard Habitat Depth m 40

Temp. Min (Adult)

C 5

Temp. Max (Adult)

C 30 Salinity Min (Adult) PSU 15 Salinity Max (Adult) PSU 33

Temp. Min (Larvae)

C 15

Temp. Max (Larvae)

C 30 Salinity Min (Larvae) PSU 20 Salinity Max (Larvae) PSU 35 Parameter

Hemigrapsus sanguineus Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 2 3 + 3

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Hemigrapsus takanoi

Parameter

Hemigrapsus takanoi Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 1 2 + 1

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Hydroides dianthus

Paramter Unit Value PLD (min) days 5 PLD (max) days 14 Generations per year no.s 2 Spawning start month 6 Spawning end month 10 Habitat Substrate type Hard Habitat Depth m 200

Temp. Min (Adult)

C 5

Temp. Max (Adult)

C 30 Salinity Min (Adult) PSU 28 Salinity Max (Adult) PSU 50

Temp. Min (Larvae)

C 12.5

Temp. Max (Larvae)

C 20 Salinity Min (Larvae) PSU 25 Salinity Max (Larvae) PSU 50 Parameter Hydroides dianthus Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3 2 2

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Paramter Unit Value PLD (min) days 1 PLD (max) days 1.5 Generations per year no.s ? (1) Spawning start month ? (7) Spawning end month ? (8) Habitat Substrate type All Habitat Depth m ? (40)

Temp. Min (Adult)

C

Temp. Max (Adult)

C 30 Salinity Min (Adult) PSU 0.1 Salinity Max (Adult) PSU 35

Temp. Min (Larvae)

C ?

Temp. Max (Larvae)

C ? Salinity Min (Larvae) PSU ? (0.1) Salinity Max (Larvae) PSU ? (35)

Laonome calida

Parameter

Laonome calida Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø

3

2 1

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Marenzelleria viridis

Paramter Unit Value PLD (min) days 28 PLD (max) days 49 Generations per year no.s 1 Spawning start month 9 Spawning end month 11 Habitat Substrate type Mud Habitat Depth m 65

Temp. Min (Adult)

C

Temp. Max (Adult)

C 25 Salinity Min (Adult) PSU 1 Salinity Max (Adult) PSU 32

Temp. Min (Larvae)

C 15

Temp. Max (Larvae)

C 25 Salinity Min (Larvae) PSU 5 Salinity Max (Larvae) PSU 20 Parameter Marenzelleria viridis Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø ++ 3 3 3

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Mytilopsis leucophaeata

Paramter Unit Value PLD (min) days 6 PLD (max) days 14 Generations per year no.s 1 Spawning start month 5 Spawning end month 10 Habitat Substrate type Hard Habitat Depth m 40*

Temp. Min (Adult)

C 5

Temp. Max (Adult)

C 37 Salinity Min (Adult) PSU Salinity Max (Adult) PSU 20

Temp. Min (Larvae)

C 13

Temp. Max (Larvae)

C 27 Salinity Min (Larvae) PSU 1 Salinity Max (Larvae) PSU 25 Parameter

Mytilopsis leucophaeata Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 2

3

2

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Mytilus galloprovincialis

Paramter Unit Value PLD (min) days 14 PLD (max) days 28 Generations per year no.s 3 Spawning start month 6 Spawning end month 9 Habitat Substrate type Sand, Hard Habitat Depth m 40

Temp. Min (Adult)

C

Temp. Max (Adult)

C 31 Salinity Min (Adult) PSU 12 Salinity Max (Adult) PSU 38

Temp. Min (Larvae)

C 15

Temp. Max (Larvae)

C 25 Salinity Min (Larvae) PSU 10 Salinity Max (Larvae) PSU 38 Parameter

Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3 3

3

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Palaemon macrodactylus

Paramter Unit Value PLD (min) days 15 PLD (max) days 20 Generations per year no.s 6 Spawning start month 4 Spawning end month 10 Habitat Substrate type All Habitat Depth m 40

Temp. Min (Adult)

C 2

Temp. Max (Adult)

C 26 Salinity Min (Adult) PSU 1 Salinity Max (Adult) PSU 36

Temp. Min (Larvae)

C 15

Temp. Max (Larvae)

C 27 Salinity Min (Larvae) PSU 1 Salinity Max (Larvae) PSU 34 Parameter

Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3 3

3

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Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3 3

3

Potamocorbula amurensis

Paramter Unit Value PLD (min) days 14 PLD (max) days 21 Generations per year no.s 2 Spawning start month 5 Spawning end month 10 Habitat Substrate type All Habitat Depth m 30

Temp. Min (Adult)

C

Temp. Max (Adult)

C 30 Salinity Min (Adult) PSU 0.1 Salinity Max (Adult) PSU 32

Temp. Min (Larvae)

C 6.4

Temp. Max (Larvae)

C 23 Salinity Min (Larvae) PSU 0.1 Salinity Max (Larvae) PSU 27.6 Parameter

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Rangia cuneate

Paramter Unit Value PLD (min) days 7 PLD (max) days 7 Generations per year no.s 0.5 Spawning start month 5 Spawning end month 10 Habitat Substrate type Mud, Sand Habitat Depth m 15

Temp. Min (Adult)

C 1

Temp. Max (Adult)

C 29 Salinity Min (Adult) PSU 1 Salinity Max (Adult) PSU 15

Temp. Min (Larvae)

C 8

Temp. Max (Larvae)

C 30 Salinity Min (Larvae) PSU 2 Salinity Max (Larvae) PSU 20 Parameter

Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 3 2 2

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Rapana venosa

Paramter Unit Value PLD (min) days 14 PLD (max) days 80 Generations per year no.s 1 Spawning start month 4 Spawning end month 11 Habitat Substrate type All Habitat Depth m 40

Temp. Min (Adult)

C 4

Temp. Max (Adult)

C 27 Salinity Min (Adult) PSU 7 Salinity Max (Adult) PSU 32

Temp. Min (Larvae)

C 13

Temp. Max (Larvae)

C 26 Salinity Min (Larvae) PSU 15 Salinity Max (Larvae) PSU 30 Parameter

Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø

3

3 2

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Rhithropanopeus harrisii

Paramter Unit Value PLD (min) days 7 PLD (max) days 43 Generations per year no.s 1 Spawning start month 6 Spawning end month 9 Habitat Substrate type Hard Habitat Depth m 37

Temp. Min (Adult)

C

Temp. Max (Adult)

C 35 Salinity Min (Adult) PSU 5 Salinity Max (Adult) PSU 30

Temp. Min (Larvae)

C 14

Temp. Max (Larvae)

C 27 Salinity Min (Larvae) PSU 5 Salinity Max (Larvae) PSU 30 Parameter Rhithropanopeus harrisii Dispersal potential Habitat conditions Pressence status Robustness Connectivity: KØ N S W E Ø 2 + 3 2

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Same Risk Area Assessment

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Robustness Kattegat & Øresund Northern Kattegat Southern Kattegat Western Kattegat Eastern Kattegat Øresund Helcom/Ospar Target species attaches to hull Impact potential Impact type Arcuatula senhousia 3 3

3

KØ N S W E Ø yes + 2 ecosystem, biodiversity Asterias amurensis 3 3

3

KØ N S W E Ø yes + 3 ecosystem, biodiversity Austrominius modestus 1 1 1 3 KØ N S W E Ø no ++ 2 ecosystem, biodiversity, infrastr. Bugula neritina 1 2

3

KØ N S W E Ø no ++ 1 fouling Bugulina simplex 1 1

3

KØ N S W E Ø no + 1 Callinectes sapidus 2 3 + 3 KØ N S W E Ø yes

1

Crassostrea gigas 3 2 ++ 3 KØ N S W E Ø yes + 2 ecosystem, biodiversity Didemnum vexillum 1 2

3

KØ N S W E Ø yes ++ 3 ecosystem, biodiversity Ensis directus 3 3 ++ 2 KØ N S W E Ø yes

1

Eriocheir sinensis 2 3 + 3 KØ N S W E Ø no + 2 ecosystem, biodiversity Ficopomatus enigmaticus 2 2 + 2 KØ N S W E Ø yes + 2 ecosystem, biodiversity, fouling Hemigrapsus sanguineus 2 3 + 3 KØ N S W E Ø yes + 2 ecosystem, biodiversity Hemigrapsus takanoi 1 2 + 1 KØ N S W E Ø yes + 2 ecosystem, biodiversity Hydroides dianthus 2 2

3

KØ N S W E Ø yes ++ 2 fouling Laonome calida 2 1

3

KØ N S W E Ø no ? ? Marenzelleria viridis 3 3 ++ 3 KØ N S W E Ø yes

3

ecosystem, biodiversity Mytilopsis leucophaeata 2 2

3

KØ N S W E Ø yes + 3 fouling Mytilus galloprovincialis 3 3

3

KØ N S W E Ø yes + 2 biodiversity Palaemon macrodactylus 3 3

3

KØ N S W E Ø yes + 1 Potamocorbula amurensis 3 3

3

KØ N S W E Ø yes

3

ecosystem, biodiversity Rangia cuneata 1 1

3

KØ N S W E Ø yes ? 3 ecosystem, biodiversity, fouling Rapana venosa 3 3

3

KØ N S W E Ø yes ? 3 ecosystem, biodiversity, fouling Rhithropanopeus harrisii 2 2 + 3 KØ N S W E Ø yes + 2 fouling, fishing gear Pressence status Connectivity SPECIES Dispersal potential Habitat conditions Same-Risk assessment parameters

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Same Risk Assessment

High Connectivity
Low (or No) connectivty

– But already widely distributed – Registered many years ago and not yet invasive – Ballast water not the primary vector

Low (or No) connectivty

– Not introduced – Newly registered – Ballast water primary or major vector Same (or No) Risk May pose additional RISK Same (or No) Risk

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Robustness Kattegat & Øresund Northern Kattegat Southern Kattegat Western Kattegat Eastern Kattegat Øresund Helcom/Ospar Target spcies attaches to hull Impact potential Impact type Arcuatula senhousia 3 3

3

yes + 2 ecosystem, biodiversity Asterias amurensis 3 3

3

yes + 3 ecosystem, biodiversity Austrominius modestus 1 1

3

no ++ 2 ecosystem, biodiversity, infrastr. Callinectes sapidus 2 2 + 2 yes

1

Crassostrea gigas 3 3 ++ 3 yes + 2 ecosystem, biodiversity Ficopomatus enigmaticus 2 2 + 2 yes + 2 ecosystem, biodiversity, fouling Hemigrapsus sanguineus 3 3 + 3 yes + 2 ecosystem, biodiversity Hemigrapsus takanoi 2 2 + 1 yes + 2 ecosystem, biodiversity Hydroides dianthus 2 2

3

yes ++ 2 fouling Marenzelleria viridis 3 3 ++ 3 yes

3

ecosystem, biodiversity Mytilus galloprovincialis 3 3

3

yes + 2 biodiversity Palaemon macrodactylus 3 3

3

yes + 1 Rapana venosa 3 2

3

yes ? 3 ecosystem, biodiversity, fouling Rhithropanopeus harrisii 2 3 ? 2 yes + 2 fouling, fishing gear SPECIES Dispersal potential Habitat conditions Pressence status Connectivity Same-Risk assessment parameters

Same-Risk Assessment

Species that DO NOT pose a risk

Species with high connectivity*

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Species that MAY pose a risk

= Same Risk may be justified in the whole of Kattegat and Øresund = Same Risk may be limited to parts of Kattegat and Øresund

Robustness Kattegat & Øresund Northern Kattegat Southern Kattegat Western Kattegat Eastern Kattegat Øresund Helcom/Ospar Target species Attaches to hull Impact potential Bugula neritina 1 2

3

KØ N S W E Ø no ++ 1 Bugulina simplex 1 1

3

KØ N S W E Ø no + 1 Didemnum vexillum 1 2

3

KØ N S W E Ø yes ++ 3 Ensis directus 3 3 ++ 2 KØ N S W E Ø yes

1

Laonome calida 2 1

3

KØ N S W E Ø no ? ? Mytilopsis leucophaeata 2 2

3

KØ N S W E Ø yes + 3 Potamocorbula amurensis 3 3

3

KØ N S W E Ø yes

3

Rangia cuneata 1 1

3

KØ N S W E Ø yes ? 3 Rhithropanopeus harrisii 2 2 + 3 KØ N S W E Ø yes + 2 Same Risk rating SPECIES Dispersal potential Habitat conditions Pressence status Connectivity Same-Risk assessment

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STRICT The limited SRA delineation based solely on connectivity INCLUSIVE A less limited SRA delineation typically supported by limitations based on traits

Interpretation: Same Risk Area Delineation

Species that MAY pose a risk

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SRA - Bugulina simplex

SRA

Inclusive interpretation Strict interpretation

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Strict interpretation:

Connectivity is highly limited except Øresund.

Inclusive interpretation:

Most of Kattegat and Øresund sub-optimal conditions
Low impact
Not on Helcom/Ospar target species list
Attach to hull
Not registered

SRA - Bugulina simplex

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Inclusive interpretation Strict interpretation

SRA - Laonome calida

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Strict interpretation:

Limited connectivity due to low PLD (1 day)
Habitat is large
Habitat is uncertain – if lest extent then connectivity more limited
High impact
Very little know about the species

Inclusive interpretation:

If habitat is well represented connectivity is low but existing
Adult salinity tolerance range is uncertain
Larval salininty tolerance range uncertain
Not yet recorded (however in Netherlands, Rhine, and Baltic Sea)
Not on the HELCOM/OSPAR target species list
Taxonomy is uncertain

SRA - Laonome calida

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Inlcusive interpretation Strict interpretation

SRA - Mytilopsis leucophaeata

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STRICT interpretation:

Connectivity is highly limited except Øresund and SE Kattegat.
On the HELCOM/OSPAR list
High impact
Registered adjacent marine areas

INCLUSIVE interpretation:

Sub-optimal adult salinity conditions in ALL Kattegat and Øresund
Limited east-west connectivity may be uncertain
PLD range from 6 -14 days
In Europe since 1835, in North Sea and Baltic Sea in relation to

freshwater outlet.

Not registered Kattegat-Øresund
Attach to Hull

SRA - Mytilopsis leucophaeata

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Inclusive interpretation Strict interpretation

SRA - Potamocorbula amurensis

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Strict interpretation:

Limited connectivity in the E-W direction in Kattegat
High impact potential
On the HELCOM/OSPAR target species list.

Inclusive interpretation:

Not been registered.
PLD range from 14 - 21 days
E-W connectivity limited but existing
Kattegat at the edge of upper tolerance limit for larvae

SRA - Potamocorbula amurensis

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Inclusive interpretation Strict interpretation

SRA - Rangia cuneate

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Strict interpretation:

Connectivity is highly limited except Øresund
Shallow areas in the central Kattagat are not considered because of its

location at the edge of the expected salinity thresholds for population

High impact.
SRA include Øresund and areas outside the larval dispersal range

Inclusive interpretation:

Sub-optimal salinity conditions in ALL Kattegat and Øresund
Dispersal potential is moderate
Species is not registered in the region

SRA - Rangia cuneate

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SRA - Rhithropanopeus harrisii

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Strict interpretation:

Connectivity in the whole of Kattegat is uncertain
Habitat may be overestimated
Established south of Øresund
On the HELCOM/OSPAR target species list

Inclusive interpretation:

PLD may be considerably longer
Hull fouling as a contributing vector
Recorded in Copenhagen area since 1957 and only recently established

locally

The dispersal potential in general is reported as moderate
The impact potential in general is reported as moderate

SRA - Rhithropanopeus harrisii

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Conclusions

Six species may be scrutinized for posing a risk in an

SRA in Kattegat and Øresund

Whole of Kattegat & Øresund as an SRA may be

justified, but depends on what is ”acceptable risk”?

With SRA it is possible to apply a systematic and

transparent approach

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Thank you

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Additional data

Population genetics of Sea grass (Zostera marina)

Jahnke et al. 2018

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