Term 2 Questions Flashcards
what technique has more detailed bathymetry
Multibeam echosonar
what are the types of direct techniques for marine surveys
benthic grabs, diver, dredges, trawls, traps, nets
what are the types of remote techniques for marine surveys
drop frame camera, towed camera, ROV, BRUV
what are the cons of sidescan sonars
can only be used in straight survey lines, data can be affected by current + swell
what are the cons of using single beam scanners
takes longer and smaller area produced
why is GPS positioning in marine surveys important
provides sampling location, allows repeatability
what are factors that change in the esturary from saline to less
phytoplankton species, wave conditions, light conditions, dynamics
what is measured from esturies
nutrients, sediment loads, orgnic material, pollutants + waste, larvae + spore transport
what are techniques to measure esturies
drogue buoy tracking, rhodamine dye tracing, dopplar current profiling
what does the acoustic dopple current profiling measure
water velocity + direction in either column or estury )to work out residence times)
why do power stations water have to be monitroed
pumps warm water out, providing microclimate for invasive species to thrive
why is the fal estruary important
county’s largest estuary,
important for maritime trade, tourism and conservation
(landscape, habitats and species)
why is marine conservation in the uk complicated
different governments (wales scotland ect.) so difficult to coordinate
who are the 2 key adivsing bodies for Uk governments on enviromental conservation
JNCC, forestry commision
what are the limitations of EMODnet
coverage is braodscale, usually poor resolution and patchy
