Figure 1. Low-tide exposed hummocks with seagrass alternate with waterlogged, bare hollows in June (A).

Seagrass patch cover changed significantly over time (ANOVA: F _2,17 = 66.6, p<0.001) from about 61% in June, to over 93% in August, followed by a sudden decrease again to 44% in November due to waterfowl grazing in September and October (B). Error bars indicate SD (number of replicates = 6).