1.   But Jon Avery, a wildlife service biologist, stressed the importance of salvaging the last remaining dunes system in the Los Angeles basin.

2.   For several years, the town has used bulldozers to pile up the sand, creating an artificial dune system.

3.   This site was once part of the old Florida dune system, making it one of the highest elevations in Palm Beach County.

4.   Regier and Ellis warn that anchoring the dune with plants would defeat the purpose of having an active dune system.