is particularly evident in P. oceanica, in which
shoot levels drop to about 40% of those measured in winter and also N content of belowground in summer are the lowest recorded in the
50
40
~
30
't:J
' *'
()
20
10
0
Seasonal Trends in Adriatic Seagrass Communities
293
four seasons. By contrast, highest levels (both in
below- and above-ground organs) are reached in
winter in P. oceanica, in autumn-winter in Z.
marina and in spring in C. nodosa.
5
P. oceanica
4
,
o
50 ,-----------------------------------------~ 5
Fig. 5. Variations of carbon and
nitrogen content in above- and
below-ground parts of the seagrass species studied, in the four
seasons
C. nodosa
40
4
~
30
3
"C
' *'
()
20
2
10
0
0
50
5
Z. marina
40
4
;: 30
3
"C
~
0
()
20
2
10
1
0
0
Winter
Spring
Summer Autumn
c:::=J C above ~ C below c:::=J N above -
N below
::
"C
~
. .
z
~
't:J
~
0
z