Driftwood is marine debris. It can have a role on a beach, but not typically on public beaches where animals and insects do not nest or forage due to the proximity to people. Even in a natural setting driftwood is not a significant resource because it is ephemeral - there one day and gone the next due to wind and wave action.
My scavenging practice involves selecting precisely the pieces (twigs only) I need and leaving the rest as is. I roam public beaches only as driftwood is often removed by beach management and discarded any way. I visit beaches in the spring, summer, and autumn to avoid clearing this natural resource from a single area.
Sustainability Statement About Materials