Skip to Main Content
Soil ecological interactions: comparisons between tropical and subalpine forestsAuthor(s): Grizelle Gonzalez; Ruth E. Ley; Steven K. Schmidt; Xiaoming Zou; Timothy R. Seastedt
Source: Oecologia 128 :549–556
Publication Series: Miscellaneous Publication
PDF: View PDF (108 B)
DescriptionSoil fauna can influence soil processes through interactions with the microbial community. Due to the complexity of the functional roles of fauna and their effects on microbes, little consensus has been reached on the extent to which soil fauna can regulate microbial activities. We quantified soil microbial biomass and maximum growth rates in control and fauna-excluded treatments in dry and wet tropical forests and north- and south-facing subalpine forests to test whether soil fauna effects on microbes are different in tropical and subalpine forests. Exclusion of fauna was established by physically removing the soil macrofauna and applying naphthalene. The effect of naphthalene application on the biomass of microbes that mineralize salicylate was quantified using the substrate induced growth response method. We found that: (1) the exclusion of soil fauna resulted in a higher total microbial biomass and lower maximum growth rate in the subalpine forests, (2) soil fauna exclusion did not affect the microbial biomass and growth rate in the tropical forests, and (3) the microbial biomass of salicylate mineralizers was significantly enhanced in the faunaexclusion treatment in the tropical wet and the southfacing subalpine forests. We conclude that non-target effects of naphthalene on the microbial community alone cannot explain the large differences in total microbial biomass found between control and fauna-excluded treatments in the subalpine forests. Soil fauna have relatively larger effects on the microbial activities in the subalpine forests than in tropical dry and wet forests.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGonzalez, Grizelle; Ley, Ruth E.; Schmidt, Steven K.; Zou, Xiaoming; Seastedt, Timothy R. 2001. Soil ecological interactions: comparisons between tropical and subalpine forests. Oecologia 128 :549–556
KeywordsSoil fauna, Tropics, Subalpine, Naphthalene, Substrate induced growth response
- Soil fauna and plant litter decomposition in tropical and subalpine forests
- Soil pCO2, soil respiration, and root activity in CO2 - fumigated and nitrogen-fertilized ponderosa pine
- Response of soil microbial and invertebrate communities to tracked vehicle disturbance in tallgrass prairie
XML: View XML