Habitat Modification and Disturbance

Question 1

Habitat disturbances definition

Answer 1

loss or modification of essential habitat for each life stage

Question 2

does habitat use change with every life stage

Answer 2

yes

Question 3

What does ontegenic shifts in habitat use mean

Answer 3

habitat use changes with different life stages

Question 4

water diversion

Answer 4

surface and ground water diverted from its natural course for anthropegenic use

Question 5

exaples of water diversion

Answer 5

irrigation of cropland
hydrodamn
Wells

Question 6

What are the affects on damns

Answer 6

reduce flow
barrier to movement
change in thermal regieme
accumulation of contaminents

Question 7

individual

Answer 7

one fish

Question 8

population

Answer 8

many fish of one type

Question 9

community

Answer 9

fish and its surrounding habitat and critters

Question 10

diadromous

Answer 10

migrate from freshwater to marine water

Question 11

anadromous

Answer 11

born in freshwater
grow in marine
freshwater to spawn

Question 12

Semelparis

Answer 12

spawn once and die

Question 13

catadromous

Answer 13

born in marine
grow in freshwater

Question 14

what are the potential impacts of damns on populations of anadromous salmon

Answer 14

can’t go back to spawn

less population growth

Question 15

riparian habtiat

Answer 15

ecotone between lake or stream and upland zone

Question 16

what is the purpose of riparian habitats

Answer 16

act as a buffer or filter as to what will go in the river

Question 17

riparian habitat disturbance =

Answer 17

increased sediment loads
Change in temp
siltation of habitats
reduced heterogeneity
eutrophocation

Question 18

how can an increase in nutrient loads following the removal of riparian vegitation influence the life history of fish

Answer 18

more nutrient loads = eutrophication

Eutrophication =less o2= less resources = not balanced growth maintenence reproduction

habitat reduction bc oof increased sediment

Question 19

what will a nutrient load do to a water body

Answer 19

eutrophication

Question 20

structural complexity

Answer 20

many diff habitats

Question 21

What do you think connectivity means in the context of habitat use and fish movements

Answer 21

habitat use changes with diff life stages

ontogenetic shifts in habitat use

impacts water quality
disturbance or loss of any essential growth recriutment reproduction survival