smarticle particle interactions

Question 1

definition of disturbance

Answer 1

event that changes ecosystem, population, substrate availability…

Question 2

aquatic ecosystems have different rates of disturbances. explain how its different for groundwater, lakes vs streams/rivers

Answer 2

groundwater = stable = little disturbance
lake = local disturbance along shoreline and shallow areas
river/stream = most disturbance

Question 3

what is the most common disturbance in surface water ecosystems

Answer 3

flooding

Question 4

what does the impact of disturbance depend on

Answer 4

resistance (ability to withstand disturbance)
resilience (ability to recover from disturbance)

Question 5

_____ is initiated by disturbance

Answer 5

succession

Question 6

difference between primary and secondary succession and give an example

Answer 6

primary succession = completely wipes out biota or a new habitat is formed (after volcano erupts)

secondary succession = disturbances removes some species and reduces populations (drought removes the weaklings)

Question 7

what is seasonal succession and give an example

Answer 7

annual, predictable change in species composition due to change of seasons

ex. phytoplankton in lakes and seasonal nutrient patterns: warm weather = more phytoplankton = more competition = less food

Question 8

indirect interactions definition

Answer 8

interactions between two species is mediated by another species

Question 9

what is keystone species

Answer 9

one species that has a large impact on entire ecosystem relative to their abundance

Question 10

difference between exotic species vs exotic invasive species

Answer 10

exotic species are just foreigners chilling

exotic invasive species are species that proliferate and cause damage in new habitats like zebra musseles and rusty crayfish

Question 11

invasive species are typically _______ with high _____ capacity

Answer 11

generalists
reproductive

Question 12

extinctions occur in aquatic ecosystems due to

Answer 12

pollution, habitat loss and invasive exotic species

Question 13

loss of biodiversity impacts ___ and )_____

Answer 13

nutrient cycling and economic impacts

Question 14

which experiences more disturbances: lake or wetlands

Answer 14

wetlands (& rivers. & streams all experience the most disturbance)

Question 15

most aquatic ecysstsomes have ____ resistance and ____ resilience

Answer 15

low resistance
high resilience