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Fleshy macroalgal cover at all sites was relatively low, with only three sites (PB-01,18, 19) having greater than 30% cover. Crustose coralline algae ranged from 8% to 34% cover, with eight sites exceeding 20% (PB-02, 06, 10, 11, 12, 13, 14, 15) and two of these exceeding 30% (PB-14, 15). Macroalgal cover was weakly correlated with CCA cover (r2= 0.26, p=0.03). Turf algae was high at two sites (>20%, PB-06, 07), while cover of cyanobacteria was less than 2% at all sites (Fig. 9). CCA

70

Macro 60

Erect coralline Turf

Percent cover

50

Cyano

40

30

20

10

0

Fig. 9. Percent cover of algae within 19 locations on Pedro Bank. Algae are divided into the following functional groups: crustose coralline algae (CCA), fleshy macroalgae (macro), erect coralline algae (erect coralline), turf algae (turf) and cyanobacteria (cyano). Mean and standard error are shown.

The dominant genera of macroalgae seen on these reefs was Dictyota, with lesser amounts of Sargassum and Stypopodium. The only exception to this was site 17, at the northwestern end of the bank, where reefs were dominated by Caulerpa racemosa. Erect coralline algae consisted primarily of species of Halimeda. Fleshy and erect coralline algae predominantly colonized the margins of corals and bases of coral heads, with turf algae on exposed substrates and dead corals. Macroalgal height ranged from 1- 2.3 cm. The cover of macroalgae did not appear to be correlated with the height of the macroalgae (r2= 0.01, p=0.66). The relative biomass, as determined from height and cover, are shown for each site in Fig 10.  

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Profile for Khaled bin Sultan Living Oceans Foundation

Global Reef Expedition Final Report: Jamaica  

In March of 2012, scientists on the Global Reef Expedition set out to assess the community structure, health, and resilience of corals and c...

Global Reef Expedition Final Report: Jamaica  

In March of 2012, scientists on the Global Reef Expedition set out to assess the community structure, health, and resilience of corals and c...

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