Mireille Consalvey PhD Thesis - University of St Andrews

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The site was sampled for the duration of the exposure period for 3 days
over the penod 9-14 May 2000 (Table 5.4). Fluorescence measurements (F, 15
and F,, 15) were first taken approximately 20 min after exposure, approximately
once an hour for the duration of the exposure period and immediately prior to
submersion (Table 5.6). The fluorescence measurements were always taken from
exactly the same spot at all times and on all days. To achieve this, a template was
placed in between two canes that were left at the site in between sampling
periods (Figure 5.3 B). The measurements were taken approximately 10 cm apart
2
and the area sampled was 0.18 m. Each spot was dark-adapted using an opaque
lid and the fluorescence measurements were taken at the same time as lid
removal.
Sediment temperature was logged every 10 min using a Grant probe and
data logger. PPFD was recorded at least once an hour using a LICOR LI-189
light meter.
Table 5.4: Tidal times at the Eden
Exposure Low tide Immersion Emersion
Day Date tune time pen-od Weather
13: 37: 00
1 09/05/00 09: 55 (222 minutes) 16: 40 405 minutes Sunny, windy
05: 51: 00 Sunny after
2 13/05/00 02: 30 (201 minutes) 08: 40 370 minutes dawn
3 14/05/00 1
19: 37: 00
* Days 1,2 and 3 correspond to days 1,5 and 6 in Honeywill (2001).
15: 45 (232 minutes) 22: 25 1400 minutes Hazy sunny
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