Relationships between Plant Biodiversity and Soil Fertility in a Mature Tropical Forest, Costa Rica

Table 1

Life zone, elevation, and graphic dot for each sampling plot.

Life zone	Elevation (m)	Sampling plot #	Graphic dot form
Premontane Moist Forest	822	7	□
	877	8	◊
	943	1	∆
Premontane Wet Forest	1,036	2	X
	1,098	9
	1,140	4	-
Premontane Rain Forest	1,309	5	_
	1,393	3	○
	1,415	6	+