Create an account
water that is derived from a surface stream in contrast to groundwater that is derived from underground streams and high water tables. -Page 155
transport of material due to the random movement of particles; net movement is from areas of high concentration to areas of low concentration. -Page 146
referring to organisms with body fluids with a higher solute concentration than the external environment (e.g. most freshwater fishes) -Page 146
referring to organisms with body fluids with lower solute concentration than the external environment (e.g. most marine bony fishes) -Page 146
water's tendency to adhere to the walls of containers such as cell walls or the soil particles lining a soil pore; adhesion and cohesion due to hydrogen bonds -Page 148
water released during oxidation of organic molecules (e.g. six molecules of water are produced during the oxidation of one glucose molecule) -Page 151
movement of water across a semi-permeable membrane from an area of high water concentration (low solutes) to an area of low water concentration (high solutes) -Page 146
a measure of the water content of air relative to its content at saturation; ratio of actual water vapour density to saturation water vapour density. -Page 145
saturation water vapour pressure
the pressure exerted by the water vapour in air that is completely saturated (cannot hold any more water vapour) -Page 145
stable isotope analysis
analysis of the relative concentrations of stable isotopes in materials (e.g. 13C and 12C; used in ecology to study the flow of energy and materials through ecosystems. -Page 165
vapour pressure deficit (VPD)
the difference between the actual water vapour pressure and the saturation water vapour pressure at a particular temperature. -Page 145
the free energy content of water (capacity to do work); water moves from positions of higher free energy to positions of lower free energy; increases as solute concentration decreases -Page 147
water vapour pressure
the atmospheric pressure exerted by the water vapour in air; increases as the water vapour in air increases. Page 145
referring to organisms with body fluids with the same solute concentration as the external environment (e.g. most marine invertabrates) -Page 146
___ organisms regulate their internal water by balancing water acquisition against water loss.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together