278
I. Di Geronimo et aL
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38°30'
~~~------~~~------~~-----~~~~-~---~ 38 ° N
14 °E
14 D 30'
15 D
Fig. 1. Location of sampled stations (st)
Material and Methods
Thble 1. Coordinates and depths of sampled stations
The investigated area (Fig. 1) is located in the Station
Coordinates (N.E)
Depth (m)
Southern Tyrrhenian Sea, between the Aeolian 2B
38°30'27" 14°41'42"
1355
Archipelago and the north-eastern coast of 3
38"24'46" 14°44'57"
1410
Sicily. The western part (Cefalu Basin) has a wide 7
38°34'09" 14°25'01"
1197
flat bottom, ca. 1,500 m deep and abrupt edges, 8
38°27'53" 14°23'10"
1510
while the eastern one (Gioia Basin) gradually 9
38°20'08" 14°23'10"
1511
declines to North and it is grooved by canyons.
10
38°13'27" 14°24'50"
1357
Sediment samples (Table 1) were collected by
12
38°04'40" 14°11'05"
411
13
38°12'54" 14°09'29"
1510
means of a box-corer during the EOCUMM95 14
38°20'08" 14°10'47"
1139
Cruise (summer 1995), onboard of "Ammiraglio 15
38°29'06" 14°11'39"
1521
Magnaghi" (Rosso and Corselli 1996). Sampled 16
38°33'42" 14°13'59"
1340
volume per station was ca. 6.5 dm 3 (core sam- 21
38°18'00" 14°56'00"
1094
pIing surface 19x14 cm, depth 25 cm). The sedi- 23
38°17'06" 15°10'06"
505
ment was washed through 1 mm, 500 ]lm and 250
25
38°26'08" 15°04'55"
1018
26
38°38'30" 14°57'53"
945
]lm sieves.
27B
38°32'26" 15°05'02"
1096
Benthic assemblages from 28 stations were 28
38°20'40" Is01S'30"
820
studied. Analysis was carried out on the fraction 29
38°23'47" Is027'04"
897
coarser than 500 ]lID, focusing on molluscs, bry- 30
38°26'49" 15°22'39"
1050
ozoans and serpulids.
31
38°32'03" IS028'18"
1061
Each core was preliminarily vertically subdi32B
38°33'S3" 15°05'33"
1219
33
38°35'23" 15°25'40"
875
vided into different layers, according to sediment 34
38°42'36" Is028'06"
IS36
colour and/or texture changes. No remarkable 35
38°38'32" 15°38'21"
696
faunal difference was recorded through the lay- 36
38°33'52" 15°41'12"
724
ers, and each core was then treated as a single 37
38°29'20" Is050'19"
248
sample.
39
38 Q 27'33" 15°34'26"
786
Specimens were scored as follows: whole
44
38°32'25" 15°18'53"
1210
I. Di Geronimo et aL
.......
t-----'='"---.. .... ....... ..... '
7
16 _
o •
6
•
14
8
•
•
10
13
•
•
........
..... .......
~(\o rf' ... ....... .
.. ... '3"
. " : -, .. ,:.. ' : --:: .' ~.
.'
':ffJrf'
..... ......
.,7.
.....
. ~500 In .... .•
. '
26
•
21
•
o
278
•
25
•
32B~"'/
• 44
•
28
•
.:., .
:
... :34
•
33
•
31
•
30
• 29
•
35
•
20 km
'.
36
•
39
• ......
.'
38°30'
~~~------~~~------~~-----~~~~-~---~ 38 ° N
14 °E
14 D 30'
15 D
Fig. 1. Location of sampled stations (st)
Material and Methods
Thble 1. Coordinates and depths of sampled stations
The investigated area (Fig. 1) is located in the Station
Coordinates (N.E)
Depth (m)
Southern Tyrrhenian Sea, between the Aeolian 2B
38°30'27" 14°41'42"
1355
Archipelago and the north-eastern coast of 3
38"24'46" 14°44'57"
1410
Sicily. The western part (Cefalu Basin) has a wide 7
38°34'09" 14°25'01"
1197
flat bottom, ca. 1,500 m deep and abrupt edges, 8
38°27'53" 14°23'10"
1510
while the eastern one (Gioia Basin) gradually 9
38°20'08" 14°23'10"
1511
declines to North and it is grooved by canyons.
10
38°13'27" 14°24'50"
1357
Sediment samples (Table 1) were collected by
12
38°04'40" 14°11'05"
411
13
38°12'54" 14°09'29"
1510
means of a box-corer during the EOCUMM95 14
38°20'08" 14°10'47"
1139
Cruise (summer 1995), onboard of "Ammiraglio 15
38°29'06" 14°11'39"
1521
Magnaghi" (Rosso and Corselli 1996). Sampled 16
38°33'42" 14°13'59"
1340
volume per station was ca. 6.5 dm 3 (core sam- 21
38°18'00" 14°56'00"
1094
pIing surface 19x14 cm, depth 25 cm). The sedi- 23
38°17'06" 15°10'06"
505
ment was washed through 1 mm, 500 ]lm and 250
25
38°26'08" 15°04'55"
1018
26
38°38'30" 14°57'53"
945
]lm sieves.
27B
38°32'26" 15°05'02"
1096
Benthic assemblages from 28 stations were 28
38°20'40" Is01S'30"
820
studied. Analysis was carried out on the fraction 29
38°23'47" Is027'04"
897
coarser than 500 ]lID, focusing on molluscs, bry- 30
38°26'49" 15°22'39"
1050
ozoans and serpulids.
31
38°32'03" IS028'18"
1061
Each core was preliminarily vertically subdi32B
38°33'S3" 15°05'33"
1219
33
38°35'23" 15°25'40"
875
vided into different layers, according to sediment 34
38°42'36" Is028'06"
IS36
colour and/or texture changes. No remarkable 35
38°38'32" 15°38'21"
696
faunal difference was recorded through the lay- 36
38°33'52" 15°41'12"
724
ers, and each core was then treated as a single 37
38°29'20" Is050'19"
248
sample.
39
38 Q 27'33" 15°34'26"
786
Specimens were scored as follows: whole
44
38°32'25" 15°18'53"
1210