From 1998–2006, the Oregon Bureau of Land Management conducted two parallel studies comparing fungal diversities in two locations.  The chronosequence study compared epigeous ectomycorrhizal fungal communities in young regrowth (25–32 yo), mature regrowth (55–62 yo), and virgin (>250 yo) Pseudotsuga menziesii forests. The density management study investigated immediate reestablishment of a fungal community in a 55-year old Pseudotsuga menziesii (Douglas-fir) forest after no treatment, thinning to 100, 200, or 300 trees/ha, and 'clear-cut'. The results have not been fully analyzed, but we did find that some genera (e.g., Inocybe) could be regarded as colonists of regenerated growth while others (e.g., Phaeocollybia) were best in more highly diverse undisturbed forests.  See Norvell & Exeter (2004: Ectomycorrhizal epigeous basidiomycete diversity in Oregon Coast Range Pseudotsuga menziesii forests—Preliminary observations) for full protocols, species preliminary identifications, and other observations.

   Note that our data depended on traditional identifications, and that probably slightly different results would be obtained using core samples and DNA bar codes.

For example:

http://www.cfs.nrcan.gc.ca/pubwarehouse/pdfs/31201.pdf

http://sostenible.palencia.uva.es/document/gfs/publicaciones/Articulos/Oria%20de%20Rueda%20et%20al.%202010.pdf

http://www.sciencedirect.com/science/article/pii/S0378112711002519

Dear Lorelei and Christoph

Many thanks for your help. In our case the situation is a little different from your suggestions. The study area is located in Central Argentina , and is a "Mountain Island" where a particular monospecific forest develop.

The tree is "Polylepis australis", and grows from 1700 up to 2700 masl. (along Andes, other species of Polylepis reach higher altitudes; in Bolivia is one of the Highest forest of the world in Sajama Vulcan at 4700 masl.)

In Central Argentina polylepis forest are moslty gone and we have now grazzing grass areas ...

. 15 years before a reforestation started. Now more than 15000 trees in an area of 30has are growing up. Trees are upt 3-4 mts, started to produce fruits and the landscape changed dramaticlaly.

We measured the fungal diversity (macrofungal species) , comparing an old mature forest, the reforestation and the grazzing grass areas... 

We cannot find a similar situation to compare our results .

Many thanks for your contributions!

Gerardo

Dear colleagues

here is the paper , regarding the question. I would like very much for your comments. It is written in spanish, but has abstract, and table and fgures legends in English

We (a mixed group of Brazilian and Fennoscandian scientists) are studying fungi in restored rainforests in Brazil, Para. We concentrate on wood inhabiting fungi: the focus is on polypores, but in a subset of plots we have also studied stromatic pyrenomycetes. And a study on corticioid fungi is being planned. Our study takes place in two bauxite mines: the study plots are in terra firma forests. Thus the situation is different from what Gerardo focuses on (tree species rich forests) -- but it might still be interesting to know that such a study is going on.

Dear Kadri , thanks for your answer.

I think that it would be interesting to consider functional groups among wood inhabiting fungi, mainly polypores. The abundance and diversity of different wood conditions have direct effects on fungal  communities of wood decaying fungi.