MFWB_A - Lakes and their Physiochemical Properties

turnover

time it takes for 50% of the water to be recycled

lotic

running water, e.g., rivers, streams

lentic

standing water, e.g., lakes, ponds

freshwater ecosystem services

water/food/minerals/materials source, waste dilution, transport of people and goods

fetch

how the water travels with wind speed

Bathymetry

determine various volumetric characteristics

littoral habitat

sloping shelf of lake, macrophytes, detritus

pelagic

no topographical restraints, phytoplankton, photosynthetic bacteria

euphotic

where 1% of sunlight is found

profundal

where there is no more photosynthesis, detritus, microbes

nekton

free swimming

plankton

move with the current

bentos

live on the bottom

autochthonous detritus

from the system, plankton

allochthonous detritus

outside the system, leaves

classification of algae

according to substrate it grows on

epilythic

rocks

epiphytic

plants

epipelic

soft sediment

epipsamic

sand

epilimnion

top, hottest layer

metalimnion

boundary, most rapid changes

hypolimnion

bottom, coldest layer

amiotic lakes

never mix, frozen

meromiotic lakes

mix partially, increase water density on wind

holomiotic lakes

complete mixing

oligomiotic lake

not completely mixed every year, high density

monomiotic

once a year mixing

dimiotic

twice a year, temp-latitudal

polymiotic

frequent mixing, shallow/tropics