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MAR 305 > Lecture 6 > Flashcards

Lecture 6 Flashcards

1
Q

diurnal

A

events that occur during the day

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2
Q

nocturnal

A

events that occur during night

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3
Q

diel

A

events that occur with a 24 hr periodicity

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4
Q

diel vertical migration (DVM)

A

generally upward migration at dusk and downward migration at dawn

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5
Q

hard bottom benthos

A

non-living rock or biologically derived hard substrates

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6
Q

soft bottom benthos

A

organisms associated with sand or mud

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7
Q

infauna

A

soft bottom, organisms that live within the sediments beneath the sediment-water interface

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8
Q

epifauna

A

soft bottom, organisms that live on top of the sediment surface

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9
Q

microfauna

A

<0.1mm

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10
Q

meiofauna

A

0.1mm-1.0mm

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11
Q

macrofauna

A

> 1.0mm

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12
Q

Bernoulli’s Principle

A

pressure and velocity are inversely related

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13
Q

advection

A

active process

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14
Q

diffusion

A

passive process

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15
Q

trophic amensalism hypothesis

A

the reason why you don’t find suspension feeders and deposit feeders together

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16
Q

swallowers

A

swallowing sediments, little selectivity

17
Q

tentacular feeders

A

use tentacles to trap particles by pressing against the substrate and transfer to the mouth

18
Q

siphon feeders

A

vacuum sediments into themselves, above or within the sediment

19
Q

coprophagy

A

consumption of fecal material, may appear to be a poor strategy but pellets become colonized by bacteria in 1-2 days

20
Q

alleopathy

A

the harmful effect of one organism on another caused by the release of chemical compounds produced by the first

21
Q

alternative stable states

A

existence in the same area of different groups of organisms or patches of organisms, result when some factor or set of factors disturb the dominant species, causing the community to switch to a new composition, which remains stable during the disturbance

22
Q

kelp forests

A

subtidal communities in ares of strong currents and heavy surf

MAR 305 (4 decks)

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