Conservation Ecology: In situ Behavioral Response of Common Loons Associated with Elevated Mercury (Hg) Exposure: Table 1

Table 1. List of independent variables used to test for variation with loon behavior on respective lakes. Data were collected by the Canadian Wildlife Service (N. Burgess, unpublished data), Parks Canada (Beauchamp et al. 1997), or were extracted from Kerekes and Schwinghammer (1973) and from McNicol et al. (1996).

Lake chemistry
Lake morphometry
Biological characteristics
alkalinity
surface area
interspecific competition
conductivity
island area
intraspecific competition
color
basin area
human disturbance
pH
shore length
predator presence
chlorides
maximum depth
Hg burdens in 16 g yellow perch
SO₄^2-
mean depth
immediate breeding history
nitrogen
maximum effective length
breeding stage
sodium
maximum effective width

potassium
volume

calcium
length/area

total organic carbon
basin permanence

total phosphorus
shoreline development

maximum length

maximum width

flushing

Lake chemistry	Lake morphometry	Biological characteristics
alkalinity	surface area	interspecific competition
conductivity	island area	intraspecific competition
color	basin area	human disturbance
pH	shore length	predator presence
chlorides	maximum depth	Hg burdens in 16 g yellow perch
SO₄^2-	mean depth	immediate breeding history
nitrogen	maximum effective length	breeding stage
sodium	maximum effective width
potassium	volume
calcium	length/area
total organic carbon	basin permanence
total phosphorus	shoreline development
	maximum length
	maximum width
	flushing