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Flashcards in definitions Deck (83)
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1

Spring tides =

occur when the sun and moon are lined up, so get maximum gravitational pull → maximum tidal range

2

Neap tides =

occur when sun, earth and moon form a right angle and gravitational effects are minimal

3

semi-diurnal tides

2 ~equal high tides and 2 ~ equal low tides every 24 h

4

diurnal tides

1 Low and 1 high tide per 24 h

5

photic zone/epipelagic zone

~ 0-200m deep

6

mesopelagic =

deep sea (200m - 1km)

7

bathypelagic=

>1km – 4km, also something that lives in the oceans

8

Benthic =

the bottom of the ocean, hence can be at large depths or shallows, it’s the ocean floor, organisms that live on rocks, piers

9

Abyssopelagic zone =

4km – 6km

10

hadopelagic zone (Hadel) =

deepest region in sea, within ocean trenches >6km

11

Golf stream =

= hot water from Florida moves past Sweden and becomes cold

12

Coriolis effect =

In a reference frame with clockwise rotation (southern hemisphere), the force acts to the left of the motion of the object. In one with anticlockwise (northern hemisphere) rotation, the force acts to the right

13

Thermocline =

A zone of rapid temperature decline with increasing depth

14

Catadromous fish =

spend most of their lives in fresh water, then migrate to the sea to breed

15

anadromous fish =

= live in the ocean mostly, and breed in fresh water lots of water movement & mixing (wind, currents); highly variable environments; relatively high productivity

16

Copulatory =

Is like the mammalian fertilisation

17

Non-copulatory =

Males release sperm, females hold the egg, and fertilisation occurs internally

18

Polyspermy =

describes an egg that has been fertilized by more than one sperm

19

protandry =

It can change from a male to female

20

Planktotrophy =

feeding larvae,
Plankton feeding
Weeks to months in plankton
Cheap, small (lower investment)
Ancestoral mode
Tend to be better dispersers
More species in tropics
Hot water favours PK

21

Lecithotrophy =

Non-feeding larvae
Yolk feeding
Minutes to days in plankton
Larger, less eggs (more investment)
Common
Can’t disperse for long time – medium spread
Mum gives oil resources to LC to help get through larval/plankton stage
Chemical defences
More species in cooler areas

22

Spring transition =

day the water becomes down stream instead of upwelling effects

23

Ballast Waters =

waters to help the boat stable in the storm

24

Realised niche =

when other organisms are there to kick it out

25

Fundamental niche

were they can live

26

Phytoplankton =

freely drifting, photosynthetic (microscopic) cells

27

Picoplankton =

[0.2 - 2.0 μm]

28

Nanoplankton =

[2.0 - 20 μm]

29

Microplankton =

[20 - 200 μm]

30

Femtoplankton =

<0.2 μm