WAfghanistanism
WBiogeography
WBiomass (ecology)
WClimate restoration
WClimax community
WCoevolution
WColony (biology)
WConservation status
WConstructed wetland
WDefensible space (fire control)
WDesakota
WDisturbance (ecology)
WDPSIR
WEcological succession
WEcological thinning
WEcosystem model
WEdge effects
WEducation for sustainable development
WEnvironmental engineering
WFire ecology
WFlood-meadow
WFuel ladder
WInvasive species
WBiological organisation
WLimbing
WMinimum viable population
WMire
WPerceptual trap
WPlain
WPlant litter
WPolitics of climate change
WRiparian buffer
WRural–urban fringe
WSecondary succession
WStream restoration
WSurfactant
WUrban sprawl
WVeteran tree
WWater footprint
WWater-meadow
WWetland
WWildlife management