A biological study of Durvillaea antarctica (Chamisso) Hariot and D ...

RELATIONSHIP BETWEEN TIME OF HARVESTING AND RECOLONISATION
OF D, AN2~RCTICA. Diagram to show how recolonisation of D. antarotioa
on experimentally cleared areas corresponds with the time of g~nete
release. The curves represent percentage of mature plants which
released gametes over the winter periods of 1972, 1973 and 1974, i.e,
percentage frequency of stage liD" (Table 2,2). The bars represent
ten areas cleared at different times on Tau'tuku Peninsula. The
start of each bar corresponds to 'the clearing date. The numbers
are simply code nunilie:rs of each area (see Fig. 5.10). Unshaded
portions represent no recolon.isation, solid portions dense recoJ.onisation
(> 1000 plants/m 2 ) and broken portions poor recolonisation « 10 plants/
m 2 ),
Triangles indicate a second but slight settlement in the following
season. The four areas clear outside the fruiting season (6, 7, 9a y
9b) were either poorly recolonised or not recolonised by t.he end of
1974.