This assumption proved to be incorrect
as, like Laegdsgaard and Johnson (1995), we found that mangrove
fish community assemblages can vary considerably, even over short
distances. The difference in fish abundance between paired sites
each month varied greatly from pair to pair (mean monthly CV of
differences = 114.2%). Moreover, the differences were not consistent
in magnitude or direction from month to month. The detection
of impacts is particularly challenging when pre-disturbance spatial
and temporal variability interact in this way (Underwood and