Fig. 2. Soil organic C and total forest floor litter mass under six tropical tree species at La Selva Biological Station, Costa Rica. Soils data are for the 0- to 15-cm depth. Symbols: = Hyeronima alchorneoides,
= Pentaclethra macroloba,
= Pinus patula,
= Virola koschnyi, and
= Vochysia guatemalensis.