miocrbes and palnts Flashcards

lec 9

1
Q

why are viruses important in population dynamics of aquatic ecosystems

A

because they can easily move through water (suspended in water) = easily access fish and plants and shit

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1
Q

why aren’t viruses technically organisms themselves

A

they require a host to survive

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2
Q

T/F; viruses are host sensitive

A

false: viruses can be host sensitiv or widely infective

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3
Q

when are virus infection rates high

A

high density of hosts to infect and the virus

remains viable outside host for a long time

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4
Q

viruses get deactivted how? x3

A

uv light
goes into improper host
predation by microflagellates

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5
Q

archaea live in ____ enviornment

A

extreme

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6
Q

____ is the group that is most abundant (by biomass)

A

bacteria

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7
Q

cyanobacteria:
get energy/food via =
use _____ light
habitat =
bloom conditions =

A

photosynthess
green
most aquatic habitats (even extreme)
lots of nutrients + warm + calm conditions

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8
Q

how does cyanobacteria affect water quality

A

kills fish
closese beaches
contaminates drinking water

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9
Q

cyanobacteria fix _____ and produce ____ byproducts

A

nitrogen
toxic

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10
Q

algal bloom associated with ______ of lakes

A

eutrophication (too mch nutrients)

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11
Q

Protoctista are very important base of food web becauses…

A

they create the majority of primary production and do majority of nutrient recycling

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12
Q

autotrophic protoctista example

A

algae

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13
Q

red algae:
freshwater habitat =
why is it red? =
how does the red colour affect where it can live? =

A

small streams with low light

eat blue/green light and reflects red light

they can live in shaded eenviornments because they’re taking the leftover light that the taller trees aren’t using

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14
Q

golden algae:
habitat =
physical characteristic =
____-trophic

A

attached to phytoplankton in low nutrient lake

two flagella

mixo-trophic

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15
Q

diatoms:
habitat =
primary producer or heterotroph? =
physical charageristic =
can it move? =

A

benthic zone

primary producer

frustule; silica-based cell wall

no

16
Q

dinoflagellates
habitat =
example =
physical charageristic =
____-trophic

A

lentic habitat (wetland, stream)

phytoplankton

cellulose plate “armor”

hetero-trophic

17
Q

eugenophyceae:
live in ______ conditions
habitat =
can it move? =

A

eutrophic (high nutrient)

sediments

yes

18
Q

green algae:
live in ____ conditions
unicellular forms =
multicellular forms attached to =
most ___ group of algae

A

oligotrophic (low nutrient) or eutrophic (high nutrient)

plankton community

benthic substrates

diverse

19
Q

charophytes
habitat =
live in _____ conditions

A

wetlands and benthic zones

nutrient poor

20
Q

protozoa
____-trophs
reproduce =
can do ___ cycling
likes _____ enviornment conditions

A

auto or hetero-trophs
sexually or asexually
carbon
stable

21
Q

fungi
main job =
^ this is important because
habitat =
unicellular forms are ______

A

decomposers
breaking down detritus feeds low light organisms in water

terrestrial enviornemtns

parasites

22
Q

macrophytes refer to what group

A

plants

23
Q

plants
are abundant in ______ waters
rooted in ___ substrates
important ____ for fish
how do they get nutrients

A

shallow, slow-moving

fine

shelter

from the ground

24
Q

non-vascular plants
examples =
streams are _____ and _____
provide _____ for fish

A

moss and liverworts
small and low nutrient
shelter

25
Q

vascular plants
_____ plants
provide ___ to animales
create ___

A

flowering

shelter

oxygen