Fishing and Flooding Flashcards
How much of the ocean area does industrial fishing occur in?
55% - 4x more than agriculture
Why is there difficult accurately assessing how many fish are in the ocean?
There are problems with the reported catch and actual catch. Ships don’t want bad PR.
What is one of the main problems with the ocean food web due to this over-fishing?
Twice as many low trophic level species have collapsed compared to large predators. Pinsky et al (2011)
What misconceptions are there with short-lived ‘fast’ life history species?
Presumed to be less vulnerable to fisheries because they produce fast BUT these fast species collapse just as often as species with slower life histories.
Why is fisheries management important for biodiversity?
Populations of short lived species can grow or decline quickly. If fisheries management lags behind biophysical changes, populations can be driven to collapse.
What is the UK’s primary climate related risk?
Flooding and coastal change
What is a flood management technique designed to pass flood flow quickly?
Channelization
The IPCC say storms are getting more intense or more frequent. True or false?
False. They’re not sure.
How can industrial agriculture affect biodiversity of our oceans?
Dumping by products from agriculture into the oeans, allows for an intial bloom in activity but this soon dies and Oxygen is sucked out of the water common. These low levels of oxygen in water bodies results in Ocean dead zones.
