BSEP116B Biodiversity in the Baltic Sea - Helcom

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TABLE OF CONTENTS PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 CHAPTER 1: INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 1.1 An integrated thematic assessment of biodiversity and nature conservation in the Baltic Sea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 1.2 A brief look at the history of the Baltic Sea and its biodiversity . . . . . . . . . . . . . . . . . . . .10 1.3 Current Baltic biogeography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.4 Why does Baltic biodiversity need protection? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.5 Protection of biodiversity—Global and European targets . . . . . . . . . . . . . . . . . . . . . . . . .16 CHAPTER 2: MARINE LANDSCAPES AND HABITATS . . . . . . . . . . . . . . . . . . . . . . . .18 2.1 Marine landscapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 2.1.1 Marine landscapes—the concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 2.1.2 Development of marine landscape maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 2.1.3 Application in marine management and conservation . . . . . . . . . . . . . . . . . . . . . . .22 2.1.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 2.1.5 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 2.2 Habitats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 2.2.1 Conservation and threat status of habitats/biotopes . . . . . . . . . . . . . . . . . . . . . . . .24 2.2.2 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 2.2.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 CHAPTER 3: COMMUNITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 3.1 Phytoplankton communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 3.1.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 3.1.2 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 3.1.3 Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 3.2 Habitat-forming species . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 3.2.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 3.2.2 Modelling habitat and species distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 3.2.3 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 3.2.4 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 3.3 Zooplankton communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 3.3.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 3.3.2 Factors influencing and explaining the status of Baltic copepods . . . . . . . . . . . . .45 3.3.3 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 3.3.4 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 3.4 Benthic invertebrate communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48 3.4.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48 3.4.2 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 3.4.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 3.5 Fish communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 3.5.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 3.5.2 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 3.5.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 4
CHAPTER 4: SPECIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 4.1 Harbour porpoise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 4.1.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 4.1.2 Factors influencing the status of the harbour porpoise . . . . . . . . . . . . . . . . . . . . . .64 4.1.3 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 4.1.4 Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 4.2 Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 4.2.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 4.2.2 Factors that influence the status of seals in the Baltic Sea . . . . . . . . . . . . . . . . . . . .69 4.2.3 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 4.2.4 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 4.3 Birds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71 4.3.1 Status and trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71 4.3.2 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81 4.3.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81 CHAPTER 5: TOWARDS AN INDICATOR-BASED ASSESSMENT OF THE BALTIC SEA BIODIVERSITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83 5.1 Assessing the status of biodiversity with indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83 5.2 Compatibility with approaches of European Directives . . . . . . . . . . . . . . . . . . . . . . . . . . .87 5.3 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87 5.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88 5.5 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91 CHAPTER 6: HUMAN PRESSURES ON BIODIVERSITY . . . . . . . . . . . . . . . . . . . . . . .92 6.1 Fisheries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92 6.1.1 Description of fisheries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92 6.1.2 Ecosystem effects of fishing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94 6.1.3 Major international frameworks that regulate fisheries in the Baltic Sea . . . . . . . .98 6.1.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98 6.2 Maritime activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98 6.2.1 Impacts of maritime traffic on biodiversity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99 6.2.2 Major international frameworks regulating maritime traffic . . . . . . . . . . . . . . . . 101 6.2.3 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.3 Physical damage and disturbance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102 6.3.1 Extraction and disposal activities in the Baltic Sea . . . . . . . . . . . . . . . . . . . . . . . . .102 6.3.2 Technical installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103 6.3.3 Major international frameworks that regulate physical alterations . . . . . . . . . . .106 6.3.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107 6.4 Recreational activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108 6.4.1 Recreational activities and their impact on the Baltic Sea . . . . . . . . . . . . . . . . . . .108 6.4.2 International frameworks addressing recreational activities . . . . . . . . . . . . . . . . . 110 6.4.3 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 6.5 Eutrophication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 6.5.1 Causes of eutrophication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 6.5.2 Eutrophication status of the Baltic Sea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 6.5.3 Effects of eutrophication on biodiversity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 6.5.4 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 5
Page 1: Baltic Sea Environment Proceedings
Page 4 and 5: Published by: Helsinki Commission K
Page 8 and 9: 6.6 Hazardous substances . . . . .
Page 10 and 11: 1 INTRODUCTION 8 1.1 An integrated
Page 12 and 13: Box 1.1. Biodiversity The term biod
Page 14 and 15: of saline water from the North Sea
Page 16 and 17: 14 On a global scale, marine ecosys
Page 18 and 19: Box 1.2. Regime shifts in the Balti
Page 20 and 21: 2 MARINE LANDSCAPES AND HABITATS 18
Page 22 and 23: From an ecological point of view, a
Page 24 and 25: Box 2.1.2. The Baltic marine landsc
Page 26 and 27: • A coherent data set on benthic
Page 28 and 29: Denmark Estonia Finland Germany Lat
Page 30 and 31: Mud-sandflat, Greifswald Lagoon, Ge
Page 32 and 33: 3 COMMUNITIES Communities are assem
Page 34 and 35: 32 Spring bloom index 1200 1000 800
Page 36 and 37: 34 Unusual events and new species i
Page 38 and 39: 36 Depth limit (m) the Gulf of Both
Page 40 and 41: Number of species 16 14 12 10 8 6 4
Page 42 and 43: Figure 3.2.7. Left panel shows pred
Page 44 and 45: Implications for the Baltic Sea Act
Page 46 and 47: Biomass (wet weight, mg per m 2 ) B
Page 48 and 49: the other hand, is not selected by
Page 50 and 51: iomass can be used to assess enviro
Page 52 and 53: Average number of species 20 15 10
Page 54 and 55: 52 Macoma baltica where the influen
Page 56 and 57:
the total BT identified for each ma
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Recruitment (thousands) 8000000 700
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Alien species Several alien fish sp
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4 SPECIES The number of species in
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Table 4.1.1. Results of dedicated a
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Number of stranded porpoises 180 16
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is recommended to survey harbour po
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Number of individuals 12000 10000 8
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Mean blubber thickness (mm) 40 35 3
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Breeding pairs 60000 50000 40000 30
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predation on nests and nesting adul
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sites outside the Baltic, decreased
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Table 4.3.1. Development of the pop
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80 Number of breeding pairs 3000 25
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The strategic goal of the BSAP to h
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for a given site or area. The secon
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Mussel bed reef community, Jasmund,
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Table 5.3. Assessment results of th
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Aerial photo of harbours seals (Pho
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6 HUMAN PRESSURES ON BIODIVERSITY A
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Table 6.1.1. Catch range during the
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Baltic herring trawling, Bothnian B
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6.1.3 Major international framework
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100 Oil turnover (millions of tonne
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NOx emissions and sewage Macrophyte
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Communication links There are a num
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Figure 6.3.3. Left: concrete-stone
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ecommendations would contribute to
Page 112 and 113:
Tourist fishing 110 cial fishery fo
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112 Figure 6.5.1. Integrated classi
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can be considered as having been a
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Although no direct, dramatic mass m
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Bearing in mind the complex hydrogr
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Box 6.7.1. Invasion status of the B
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Table 6.7.1. Examples of ecological
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munities that formerly consisted of
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6.8.2 Activities generating noise i
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128 and fish in the Baltic Sea area
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800 700 600 bag of the two German B
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Fish swarm on kelp (Laminaria sp.)
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tion of ice cover, either through r
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7 STATUS OF THE NETWORK OF MARINE A
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Box 7.1. Natura 2000 network of pro
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25 20 on how the criteria on ecolog
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estrial, nearshore marine, and offs
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144 >30 psu 18-30 psu 11-18 psu 7.5
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Permission needed Restricted Forbid
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Figure 7.8.a. MARXAN ’best portfo
Page 152 and 153:
The BSPA network is relatively well
Page 154 and 155:
Mammals. Among the mammals, the pop
Page 156 and 157:
154 taxonomic groups and communitie
Page 158 and 159:
156 provided by an ecosystem. Use o
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158 Reduction of human pressures Wh
Page 162 and 163:
160 fishing on fish population dyna
Page 164 and 165:
162 Baden, S., Boström, C. (2001).
Page 166 and 167:
164 Season 2001-2002. Acta Zoologic
Page 168 and 169:
166 Gasiūnaitė, Z.R., Cardoso, A.
Page 170 and 171:
168 HELCOM & OSPAR (2003): Joint HE
Page 172 and 173:
170 ICES (2008c). Report of the Bal
Page 174 and 175:
172 area: density-dependent effects
Page 176 and 177:
174 Noer, H., Clausager, I., Asferg
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176 Scheffer M., Carpenter S.R., Fo
Page 180 and 181:
178 by passive acoustic monitoring.
Page 182 and 183:
180 Warzaw, Poland Vilhunen, Jarmo,
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182 6.7 Alien speices Authors: Lepp
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ANNEX III: CONSERVATION STATUS OF T
Page 188 and 189:
ANNEX IV: HABITAT OR SPECIES DISTRI
Page 190:
ANNEX V: STATUS OF BREEDING AND WIN
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BSEP116B Biodiversity in the Baltic Sea - Helcom

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