ecology lecture 3

Question 1

biotic interactions limiting distribution

Answer 1

competition (-,-) and predation (+,-)

Question 2

competition

Answer 2

2 or more organisms/species exploit same limited resources in same geographic area

Question 3

intraspecific vs interspecific competition

Answer 3

competition within a species vs between 2 diff species

Question 4

interference vs exploitative competition

Answer 4

direct physical interaction vs indirect interaction

Question 5

competitive release

Answer 5

when one species is absent, the other expands its range of habitat
sign of competition along w sharp boundaries

Question 6

predation

Answer 6

limits through direct consumption of prey and prey’s behavioral modifications

Question 7

abiotic factors limiting distribution

Answer 7

physical and chemical: temperature, water availability, soil structure, periodic disturbances, ph/salinity, currents/oxygen

Question 8

acclimation vs adaption to abiotic factors

Answer 8

behavioral short term vs evolution long term

Question 9

temperature limitations

Answer 9

cells burst below 0 C and denature above 45 C

Question 10

serpentine soil

Answer 10

high in nickel and magnesium, limits calcium in plants, goldfield flowers use magnesium instead of calcium and can grow in it

Question 11

periodic disturbances

Answer 11

fires, hurricanes, tornadoes, and volcanoes
frequent disturbances=organisms may evolutionarily adapt
infrequent disturbances=may not be able to adapt

Question 12

chaparral/fire

Answer 12

predictable long term, plant communities adapt to be dependent on fire to maintain balance