Table 7.

A description of the potential impacts resulting from floating mooring tidal turbine projects. See text, Section 3.3, for a narrative summary of this development scenario. Ecosystem components are ranked by their proportion of the major impacts. Moderate impacts are listed in the order they appear in the renewable energy impact matrix.

(i5) Floating mooring tidal turbine projects
Priority	Major impacts	Certainty
(1) Benthic habitat and resources	(i) Changes in hydrodynamics (ii) Scour and/or deposition	(i) Medium (ii) High
(2) Fish species and fishing activity*	Loss of access to grounds during construction and operation (mobile gear)	High
Component	Moderate impacts	Certainty
Benthic habitat and resources	(i) Resuspension of pollutants in sediments	(i) Low
	(ii) Chemical spills, discharge	(ii) Medium
	(iii) Disturbance from installation of cable	(iii) Medium
	(iv) Changes to current/wave regime	(iv) Medium
Fish species and fishing activity	(i) Collision/blade strike	(i) Medium
	(ii) Pressure gradients around rotor	(ii) Medium
	(iii) Chemical spills	(iii) Medium
	(iv) Operational noise	(iv) Medium
	(v) Noise from pre-construction seismic surveys	(v) Medium
	(vi) EMF	(vi) Low
	(vii) Habitat/community composition alteration	(vii) Medium
	(viii) Loss of access to grounds during construction and operation (fixed gear and recreational)	(viii) High
	(ix) Changes in species distribution	(ix) Low
	(x) Damaged/lost gear	(x) High
Avian species	(i) Collision with rotating turbine blades	(i) Medium
	(ii) Pressure gradients around rotor	(ii) Medium
	(iii) Leakage of lubricants/fluids, release of maintenance chemicals	(iii) Medium
	(iv) Large chemical spills	(iv) High
Marine mammals and sea turtles	(i) Entanglement with mooring lines or cables	(i) Medium
	(ii) Strikes with installation or support vessels	(ii) High
	(iii) Operational noise	(iii) Medium

*Denotes that higher priority may be given to this component due to national/regional/local regulatory objectives and obligation.