Here are some questions
have arisen in our discussions:
- Freshwater invertebrate communities are
well developed as indicators of the "health" of stream ecosystems. Why
not comparable biotic indicator systems for soils?
- Does soil microbial community structure
matter to biogeochemical cycling at the ecosystem scale?
enviromental conditions become unfavourable, bacteria can go into a sporulation
phase to achieve dormancy. What are the internal and external controls
on this process for soil bacteria?
all soil bacterial species achieve dormancy?
is the relationship between rate of change in an environmental stress factor,
and the proportion of the bacterial community that achieve dormancy?
spore production an analagous method by which fungi achieve dormancy?
conditions of carbon limitation in soil microbes, what determines the
balance between allocation to exoenzyme production and allocation to maintenance
is the adaptive significance of "overflow metabolism" in soil microbes?
organic nitrogen (DON) uptake by plants (either directly or via mycorrhizae)
seems to be more common in mid-high latitude environments than in the tropics.
Is part of the reason for this that DON pools are relatively large in these regions?
bacterial populations reach the 'stationary growth phase' in nature?
February 2006 by P. Grogan
Last Updated: 30th March 2006