L9 - Mitigation Strategies Flashcards
what are acute affects of noise pollution
noise so loud it causes damage or death
what are the two degrees of noise pollution affects
Acute and chronic effects
how do we visualize sound
whale spectrogram
what are some chronic affects of noise pollution
-whales can “tune out” sound
-whales forced to speak in different sounds.
is the decibel scale linear or logarithmic
Logarithmic
how many decibels of noise have humans added to the oceans
Average of 10db
why haven’t silent propellers been implemented?
They are expensive
Is shipping traffic increasing or decreasing?
PM trying to increase shipping.
His argument is that we can reduce noise pollution by creating “slow down zones”
what are two positive aspects of slow down zones for ship traffic?
-effective at reducing ship noise
- reduces ship strikes
what is a ship strike
when a whale is hit by a boat causing injury or death.
what are some mitigation strategies for ship strikes
- slow down zones
- Altering shipping lanes into condensed zones
- warning systems
- AIS (automated Identification systems)
what happens when plastics get broken down
Micro plastics
what is bad about microplastics
They get ingested by sea creatures and can leech toxins or fill stomachs
- can bioaccumulate.
what are the four types of disease/infection that can occur to whales
viruses
Fungal
Bacterial
Protozoa
what is domoic acid
A naturally occurring toxin produced by certain types of algae,
-can negatively affect whale reproduction
