freshwater monitoring

Question 1

why is water temperature important?

Answer 1

for Poikilotherms, they don’t regulate their internal temperature, therefore they rely on the external temperature

Question 2

what effects does temperature have?

Answer 2

metabolism, growth, behaviour, community structure, food resource availability, feeding, mortality, loss of habitat, local extinction.

Question 3

what are the lethal effects of temperature?

Answer 3

depends on acclimatization, rate of temperature change, physiological state, the health of organisms, presence or absence of thermal refugia.

Question 4

what are the controlling effects of temperature?

Answer 4

growth rates, oxygen consumption, digestion rate, reproduction. increased temperature leads to a higher metabolic rate.

Question 5

what are the direct effects of temperature?

Answer 5

behavioural responses, avoidance, selection, movement, migration.

Question 6

what determines water temperature?

Answer 6

topography, natural factors, anthropogenic factors.

Question 7

what natural factors determine water temperature?

Answer 7

sunlight, air temperature, geology hydrology, topography, climate, latitude, altitude.

Question 8

what anthropogenic factors determine water temperature?

Answer 8

climate change, riparian land use, water abstraction, thermal discharges, thermal pollution.

Question 9

which measures of water temperature matter?

Answer 9

maxima and minima, prevailing conditions, seasonal and diel fluctuations, rate of changes, duration of extreme thermal event.s

Question 10

what different areas of shading were recorded?

Answer 10

high shade, partial or little shade, ponded area with flowing water, and no shade.

Question 11

what is a critical thermal maximum?

Answer 11

where the species cannot go over, and will likely lead to death if they do so .

Question 12

what should also have been recorded?

Answer 12

precipitation, depth of streams, etc- different seasonality recordings.

Question 13

what are cold-blooded organisms called?

Answer 13

Poikilotherm

Question 14

what was the method for determining freshwater environments?

Answer 14

loggers were places on a brick, immersed in water for 2 weeks. recorded temperature and sunlight exposure. brief survey made with a schematic map to show where logger was. notable features included on the map. photograph with the location also included.

Question 15

why did you have to make a schematic map and take a picture of the logger?

Answer 15

so others could take over the experiment and to show that it is repeatable.

Question 16

what were the results?

Answer 16

high shade had highest temperature, then littl or no, then partial shading. sunlight exposure and temperature had a relationship of 12 degrees hilding highest temperature. min and max show increase from little or no to partial to high level.

Question 17

what was the aim of this exercise?

Answer 17

to establish if the conditions in the freshwater environment are suitable for the specific species.

Question 18

why does this experiment hold limitations?

Answer 18

temperatures are only recorded in the autumn months. other areas should have been recorded aswell such as depth of the stream where it was placed, etc.