Soft-Bottom Fauna of a Tropical and a Temperate Intertidal Area
263
Table 12.2. Intertidal macrozoobenthos of the Banc d' Arguin, view of the habitats
Mean values and (SD) of
Habitat
Number
Species
Individuals
ADW
of stations number
(m-2)
(g m-2)
per station
Anadara senilis
Excluded Included
Exposed
4
8
3899
6.781
6.781
beaches
Sandy flats
5
12
2885
6.085
6.085
Seagrass
16
19
1375
8.437
8.664
stands
Zostera/
12
1984
6.120
18.026
Vaucheria
Mangrove
21
987
6.692
36.436
Sebkha
3
1
121
0.033
0.033
Total area, the
27
16 (6.9)
2035 (2330) 7.606
9.282
sebkha excluded
(4.175)
( 1.654)
Table 12.3. Intertidal macrozoobenthos of the Iuist area, view of the habitats
Mean values and (SD) of
Habitat
Area
Number
Species
Individuals
ADW
(km 2 ) of stations number (m-2)
(g m- 2 )
Exposed beaches
4.41
8
5
1484
6.914
Steep ridges
0.50
4
7
1700
3.760
Light sandy flats
14.04 13
10
1004
10.184
Lanice conchilega
2.93
5
11
8341
56.767
beds a
Dark sandy flats
80.20 46
13 (3.8)
4212
51.412
(5008.7)
(100.809)
Mytilus edulis
1.37
3
9
5649
789.735
beds
Shell deposits
1.79
3
11
2537
19.896
Microbial mats
0.32
4
8
18431
12.380
Pioneer vegetation
2.36
6
5
4270
4.424
High sands
3.87
10
5
5592
3.030
Total area
108.9
102
10 (4.4)
4337
37.306
(6127.4)
(104.485)
Total area without
105.0
92
10 (4.3)
4196
41.156
"high sands"
(6071.7)
(109.485)
Total area without
103.6
89
10 (4.3)
4180
32.650
"high sands" and
(6103.6)
(75.809)
"Mytilus edulis beds"
a Lanice conchilega beds are distributed over parts of the light and dark sandy flats.
Therefore, they remain unconsidered in the total area.