RHODES, MELODY J. and TIMOTHY A. NELSON.* Department of Biology, Seattle Pacific University, Seattle, Washington 98119-1997, USA. - Interannual variation in coral reef plant communities of central Belize.
Algal and seagrass community composition were monitored biennially
along three transect lines in Belize from 1997 through 2001. Two sites
were on South Water Caye. The first was on the seaward side, between
the reef crest and the caye. The second was on the landward side of
the caye. The third site was on Long Caye, Glover's Reef Atoll. This
transect line ran from a coral rubble filled embayment, through a
small channel (formed by hurricane Hattie in 1960, bisecting Long
Caye), and into a seagrass meadow in the interior of the atoll. After
a 38 year hiatus, hurricanes struck Belize in 1998, 2000, and 2001,
giving us the opportunity to examine changes in plant community
structure before and after the storm sequence. Minimal interannual
changes were seen at South Water Caye. The seagrasses at Long Caye
were nearly eliminated along the transect line due to burial by sand.
Peak density of Thalassia testudinum at Long Caye was over 60
shoots m-2 in 1997 and less than 2 shoots m-2 in
1999 and 2001. Halodule wrightii and Syringodium
filiforme were both completely eliminated between 1997 and 1999.
Padina and Dictyota spp. flourished in the embayment
following the hurricane, but had been virtually absent prior to the
sequence of storms. Future monitoring will be conducted to follow
recovery of the meadow and look for other long-term changes.
Key words: Dictyota, hurricane, Padina, seagrass, Syringodium, Thalassia