Boreal Lakes - Higgins

Question 1

what is the largest ecozone globally?

Answer 1

boreal ecozone

Question 2

canadian boreal zone contains __% of worlds lakes, __% of worlds wetlands

Answer 2

50%

25%

Question 3

how does precipitation have an impact on algal blooms?

Answer 3

run off of agricultural farms causing P loading

Question 4

are increasing air temp the same across all seasons?

Answer 4

no, fall winter spring

Question 5

what are the 3 layers of thermal stratification?

Answer 5

epilimnion
metalimnion
hypolimnion

Question 6

what does thermal stratification do?

Answer 6

prevent mixing of layers

Question 7

2 examples of spp that relay on cold water

Answer 7

trout and mysis

Question 8

why care about water temp?

Answer 8

strong effects on MBR of biota
-small increases in water temp can cause large increase in food requirements
impacts inverts

Question 9

how are lakes impacted by increased precipitation?

Answer 9

watershed is impacted-bring in more nutrients

Question 10

impacts of DOC?

Answer 10

rainfall pushes terrestrial OC into lakes and result in DOC.
DOC absorbs light and makes lakes darker.
turns in CO2 and released

Question 11

does DOC cause lakes to act as a sink or a source?

Answer 11

source short term

sink long term (sedimentation)

Question 12

impacts of DOC on thermocline and photic level?

Answer 12

more DOC, shallower thermocline and photic line

loss of habitat for primary production