Transcript No Slide Title

SGIG
Financed by
Area of interest
N
2°30'E
2°45'E
Flemish Banks
3°00'E
Middelkerke Bank
Ravelingen
51°15'N
Western Coastal Banks
Nieuwpoort Bank
20/67
Smal
Bank
19/67
Stroom Bank
Oostende
Kleine Rede
Noordpas
swale
51°10'N
Baland Bank
05/74
05/62
Den Oever
01/87
03/87
Westdiep
02/74
Trapegeer
Potje
Belgium
Broers Bank
03/74
Proposed
Natura
areas
International
importance
for2000
waterfowl
Nieuwpoort
Koksijde
e.g. commonSpecial
scoter protection
Melanitta nigra
area
De Panne
Dutch
coast
Food
resource:
macrobenthos
Site
of Community
Interest
51°05'N
Dunkerque
Belgian
coast
France
1
0 1
5
Importance of benthic habitat
10 km
SGIG
Financed by
Schematic presentation
of the HABITAT project
Bathymetric-morphological map
Sedimentological map
Hydrodynamical map
Macrobenthic map
PRELIMINARY MAPS
Selection subarea
sampling campaign: spatial variation
sampling campaign: temporal variation
(macrobenthos, physico-chemical environment)
(macrobenthos, physico-chemical environment)
HABITAT STRUCTURE MAP
DEVELOPMENT OF QUICK AND LOW-COST EVALUATION TOOLS
HABITAT-model and Macrobenthic Side-Scan Sonar Interpretation
Sampling campaign: test
(macrobenthos, physico-chemical environment)
DEVELOPMENT OF MONITORINGS STRATEGIES AND METHODOLOGIES
TO EVALUATE THE MANAGEMENT PLAN
Study area
5670000
5669000
WESTDIEP
Westdiep
swale
SWALE
5668000
Depth in meter
(MLLWS)
0
5667000
-1
-2
Northings
5666000
SMAL
BANK
-3
Trapegeer
Smal Bank
-4
-5
-6
Broers Bank
-7
BROERS
BANK
5665000
-8
-9
-10
-11
5664000
-12
TRAPEGEER
BANK
5663000
-13
Nieuwpoort
Potje
swale
-15
-16
-17
POTJE
SWALE
5662000
-18
UTM31 ED50 co-ordinates
5661000
French border
466000
467000
468000
469000
-14
470000
471000
Eastings
0
472000
473000
1 km
474000
475000
Background information
5670000
Bedforms
5669000
Asymmetric sand dune
- offshore orientation
Asymmetric sand dune
- onshore orientation
Compound (cat-back)
sand dune
Symmetrical sand dune
5668000
Swash bar
5667000
Geomorphology
5668000
Sedimentology
Mean Grain-size
mu - phi
Trapegeer
Westdiep
5667000
5666000
Smal Bank
Westdiep
swale
Broers Bank
5665000
Trapegeer
Northings
Northings
5666000
Broers Bank
125
3
177
2.5
250
2
354
1.5
500
1
5665000
5664000
5664000
Nieuwpoort
5663000
5663000
Potje
swale
5662000
UTM31 ED50 coordinates
Potje
5662000
1 km
0
UTM31 ED50 co-ordinates
5661000
0
1 km
French border
466000
467000
468000
469000
470000
471000
472000
473000
474000
475000
Eastings
5661000
466000 467000 468000 469000 470000 471000 472000 473000 474000 475000 476000
Eastings
0.54
5670000
5670000
'Mytilus edulis' community
Hydrodynamical characteristics
0.58
5669000
Lanice conchilega community
Hydrodynamics
0.62
0.52
5668000
56670000.56
0.56
0.66
0.56
0.52
0.65
0.58
0.63
0.67
0.57
0.63
0.66
0.59
0.52
0.57
0.63
0.61
0.59
0.57
0.46
0.55
5667000
Trapegeer
Smal Bank
0.61
0.58
Westdiep
Nephtys cirrosa community s.l.
0.54
0.56
0.58
5668000
0.59
5666000
5665000
Macrobenthos
0.62
5666000
Northings
5669000
0.56
- semi-diurnal tides of macrotidal range
- strongly rectilinear currents
Broers Bank
5665000
No spatial extrapolation possible
0.57
0.47
5664000
5664000
5663000
0.55
0.53
0.49
0.52
0.5
0.36
0.49
5662000
UTM31, ED50 coordinates
0.2
0.4
Nieuwpoort
Detailed investigation necessary
5663000
Maximum current velocity (m/s)
Potje
5662000
UTM31 ED50 coordinaten
0.18
5661000
5661000
0
1 km
0
465000
466000 467000 468000 469000 470000 471000 472000 473000 474000 475000
2 km
French border
Data source: BCP model 750 m grid resolution (MUMM)
466000
467000
468000
469000
470000
471000
Eastings
472000
473000
474000
475000
Sampling campaigns
5670000
Remote sensing tracks
Area 3
5669000
Northern
area
Area 2
5668000
108
107
Westdiep
85
86
Ground
truthing sampling points
109
106
5667000
Smal Bank
Northings
5666000
5665000
3
5664000
5
5663000
5662000
Potje
53
116
76
97
95
75
117
98
94
73
115
118
Nieuwpoort
96
74
52
31
11
9
32
30
12
8
72
51
29 11933
13
7
77
54
50
34
28
14
6
71
Broers Bank
99
93
Southern
area
114
100
92
78
55
49
35
27
15
79
56
101
91
70
57
48
36
26
16
4
80
113
102
90
69
112
103
89
68
47
37
25
17
120
81
58
46
38
24
18
2
67
121
Trapegeer
111
104
88
82
59
45
39
23
19
1
83
60
44
40
22
20
110
105
87
66
61
43
41
84
65
62
42
124
21
123
122
64
63
Area 1
UTM 31N projection (ED50)
10
5661000
0
2 km
French border
465000
466000
467000
468000
469000
470000
471000
Eastings
472000
473000
474000
475000
Ground truthing sampling points
Variables taken into account
Biology (120 stations)
Macrobenthic species composition, density and biomass
Macrobenthic community structure
Physico-chemical environment (120 stations)
Pigment content of the water column and sediment
Nutrient content of the water column and sediment
Grain-size distribution
Temperature, oxygen concentration and salinity
Remote sensing (3/5 of area)
Side-scan sonar recordings
Bathymetry (single- and multibeam)
October 1999, March 2000, November 2000
Sedimentological map
5668000
HABITAT
October 1999
surficial sediments
5667000
Median (mm)
grain-size
Coarse sands
(500-1000 mu)
500
5666000
350
Medium sands
(250-500 mu)
5665000
300
5664000
250
5663000
210
Fine sands
(125-250 mu)
5662000
UTM31-ED50 coordinates
5661000
0
177
1 km
149
466000 467000 468000 469000 470000 471000 472000 473000 474000 475000
Bathymetrical settings
Digital terrain model
from multibeam registrations
Side-scan sonar mosaics
3D presentation: side-scan sonar & multibeam
VHR multiparameter image
on the basis of combined
multibeam – side-scan sonar imagery
Macrobenthos: composition
Anthozoa
Bivalvia
Crustacea
Gastropoda
Oligochaeta
Polychaeta
Echinodermata
Macrobenthos: community structure
Abra alba – Mysella bidentata
community
Magelona mirabilis
species association
Ophelia limacina – Glycera lapidum
community
Nephtys cirrosa
community
Macrobenthos: spatial distribution
5670000
Abra alba – Mysella bidentata
community
5669000
Nephtys cirrosa
community
5668000
Ophelia limacina – Glycera lapidum
community
5667000
Magelona mirabilis
species association
5666000
5665000
5664000
Nieuwpoort
5663000
Legend
5662000
group B
group A
group C
5661000
group D
French border
465000 466000 467000 468000 469000 470000 471000 472000 473000 474000 475000
Habitat structure map
CONCEPT
SEDIMENTOLOGY
Macrobenthic
habitat preferences
MACROBENTHOS
Sedimentological
interpretation
SIDE-SCAN SONAR
RECORDINGS
MACROBENTHIC SIDE-SCAN SONAR INTERPRETATION
Macrobenthic habitat preferences: sedimentology
Community Groups
5668000
M. mirabilis spec. ass.
A. alba - M. bidentata comm.
N. cirrosa comm.
O. limacina - G. lapidum comm.
Median (µm)
grain-size
5667000
Coarse sands
(500-1000 µm)
500
5666000
350
Medium sands
(250-500 µm)
5665000
300
5664000
250
Abra alba – Mysella bidentata
community
210
5663000
Fine sands
(125-250 µm)
Nephtys cirrosa
community
177
5662000
Ophelia limacina – Glycera lapidum
community
149
UTM31-ED50 coordinates
Magelona
5661000 mirabilis
species association
466000
0
467000
468000
469000
470000
471000
472000
473000
1 km
474000
475000
Sedimentological interpretation of side-scan sonar recordings
Fine sands
Fine sands with
Medium sands
-2
Medium sands
higher silt-clay %
Medium dunes
Coarser grained
wave ripples
(higher degree of compaction)
-3
TRAPEGEER
POTJE SWALE
BROERSBANK
-4
(northern branch)
-5
Depth (m MLLWS)
500 m
450
400
350
300
250
200
150
100
50
0
Macrobenthic side-scan sonar interpretation:
Bioherm structures
84 m
POTJE SWALE
(northern branch)
TRAPEGEER
-2
Visibility on SSS
-4
Sample showing a
very high abundance
of Lanice conchilega
-8
-6
0
200
400
600
800
1000
1200 m
Macrobenthos: Lanice conchilega
50
40
No
15000
30
10000
20
5000
10
0
0
0
10 - 50 50 - 100 100 250
250 500
500 1000
> 1000
density classes of Lanice conchilega
No
total density
total density
20000
Macrobenthic side-scan sonar interpretation:
Sedimentological habitat preferences (1)
Side-scan sonar imager y
Swale area (Potje)
Shoreface
-3
ar ea for
Area Slope
representative
r eprM.
esentative
mirabilis of
Community
A
species
association
-4
HA9910.011
Depth MLLWS (m)
representative
Ar Area
ea r epr
esentativefor
of
A. alba –Community
M. bidentata community
B
-5
-6
d50: 178 mu
silt-clay: 3.5 %
shells: 0.9 %
d50: 177 mu
silt-clay: 9.4 % HA9910.012
shells: 4.8 %
-7
-8
0
200
400
600
Cumulative distance (m)
800
1000
Macrobenthic side-scan sonar interpretation:
Sedimentological habitat preferences (1)
Side-scan sonar imager y
Sandbank area (Trapegeer)
characterised by very large dunes
Swale area (Potje)
Area representative for
-2
Depth MLLWS (m)
Slope ar ea for
Area representative
of
A. albar–epr
M. esentative
bidentata community
ArN.
eacirrosa
r epr esentative
of– G. lapidum
or O. limacina
Community
C to D
community
Community B
HA9910.005
-3
-4
HA9910.006
d50: 280 mu
silt-clay: 2 %
shells: 11 %
-5
d50: 165 mu
silt-clay: 4.8 %
shells: 10 %
-6
-7
0
200
400
600
Cumulative distance (m)
800
1000
Macrobenthic side-san sonar interpretation
Full-coverage delineation of ecological relevant strata
Descriptive part
Interpretation part
HABITAT model
CONCEPT
Biology
MODELING
Physical
environment
Quantified linking of environmental
and macrobenthic parameters using
multiple discrimant analysis
HABITAT model
Chemical
environment
Based on macrobenthic habitat preferences
Quantified linking
Identification of ecological relevant variables
Strategies for future monitoring
1. Selection of strata, based on remote sensing
end-user and budget-dependent
2. Follow-up of monitoring stations
Macrobenthos
Ecological relevant environmental variables (cf. HABITAT model)
3. Full-coverage monitoring of the benthic environment
e.g. side-scan sonar