November 16 Flashcards Preview

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Flashcards in November 16 Deck (27):
1

What part of the oceans are most productive?

The water closer to the surface where there is sunlight

2

What is a thermohaline circulation?

Ocean circulation is caused by temperature and salinity changes.

3

What is blue carbon?

Areas in the ocean full of carbon, carbon sinks

4

How much of the worlds carbon is in the ocean?

Half

5

Of ocean carbon how much is held by costal vegetation?

50%

6

Name three types of costal vegetation that stores carbon

Mangroves, salt marsh, sea grass

7

How old is ocean life?

3.5 billion years

8

How old is land life?

450 million years

9

What is more diverse marine life or terrestrial

Ocean

10

What are the three ocean zones?

Euphotic zone
Bathyal
Abyssal

11

What ocean zone has the most photosynthesis occurring?

Euphotic

12

How many people live off of ocean protein?

1 billion

13

Why is the jelly fish population increasing?

Large fish and turtles are being taken from the ocean

14

What is trawling?

A type of fishing that ruins the ocean floor because it drags a net along the ground

15

Are marine protected areas effective?

Yes and they result in a decrease in coral loss and increase fish biomass

16

What is the international target for marine protected areas?

10%

17

What five group must agree on the location of marine protected areas?

Federal
Parks Canada
Environmental Canada
Provincial
First Nations

18

Is fishing allowed in marine protected areas?

Yes

19

What is an NTA in a MPA?

A no take zone in a marine protected area

20

Why are rockfish important to preserve?

They mature very slowly and have a long life and slow reproduction.

21

How many sharks are endangered?

Approximately half of species

22

Are sharks k or r species?

K

23

What happens to a shark if it's finned?

It dies

24

What is the result of a depletion of sharks?

A trophic cascade and an increased amount of rays

25

What do whale sharks eat?

Whales

26

What are coral reefs?

A pulse of diversity in the oceans with 4000 species and they are the most rapidly decreasing ecosystem

27

What percentage of the earth is covered in ocean

71%