Abstract
Across three tropical Australian sclerophyll forest types, site-specific environmental variables could explain the distribution of both quantity (abundance and biomass) and richness (genus and species) of hypogeous fungi sporocarps. Quantity was significantly higher in the Allocasuarina forest sites that had high soil nitrogen but low phosphorous. Three genera of hypogeous fungi were found exclusively in Allocasuarina forest sites including Gummiglobus, Labyrinthomyces and Octaviania, as were some species of Castoreum, Chondrogaster, Endogone, Hysterangium and Russula. However, the forest types did not all group according to site-scale variables and subsequently the taxonomic assemblages were not significantly different between the three forest types. At site scale, significant negative relationships were found between phosphorous concentration and the quantity of hypogeous fungi sporocarps. Using a multivariate information theoretic approach, there were other more plausible models to explain the patterns of sporocarp richness. Both the mean number of fungal genera and species increased with the number of Allocasuarina stems, at the same time decreasing with the number of Eucalyptus stems. The optimal conditions for promoting hypogeous fungi sporocarp quantity and sporocarp richness appear to be related to the presence and abundance of Allocasuarina (Casuarinaceae) host trees. Allocasuarina tree species may have a higher host receptivity for ectomycorrhizal hypogeous fungi species that provide an important food resource for Australian mycophagous animals.
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Claims 8
Claim · model-written summary
Sporocarp quantity was significantly higher at Allocasuarina forest sites with high nitrogen and low phosphorous.
- Taxon
- Allocasuarina
Allocasuarinae0 - Outcome
- Quantitye0
- Direction
- significantly highere0
- Qualifier
- high soil nitrogen but low phosphorouse0
- Setting
- Allocasuarina forest sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Quantity was significantly higher in the Allocasuarina forest sites that had high soil nitrogen but low phosphorous.”
Claim · model-written summary
Gummiglobus, Labyrinthomyces and Octaviania occurred only in Allocasuarina forest sites.
- Taxon
- AllocasuarinaAllocasuarinae0
- Interactor
- GummiglobusGummiglobuse0symbiont
- Outcome
- hypogeous fungi were found exclusivelye0
- Qualifier
- Labyrinthomyces and Octavianiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three genera of hypogeous fungi were found exclusively in Allocasuarina forest sites including Gummiglobus, Labyrinthomyces and Octaviania”
Claim · model-written summary
Fungal assemblages did not differ significantly among three forest types.
- Taxon
- AllocasuarinaAllocasuarinat0
- Outcome
- taxonomic assemblagese0
- Direction
- not significantly differente0
- Comparator
- three forest typese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“taxonomic assemblages were not significantly different between the three forest types”
t0“Allocasuarina”
Claim · model-written summary
Sporocarp quantity had a significant negative association with phosphorous concentration.
- Taxon
- AllocasuarinaAllocasuarinat0
- Compound
- phosphorous concentratione0
- Outcome
- quantity of hypogeous fungi sporocarpse0
- Direction
- negative relationshipse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant negative relationships were found between phosphorous concentration and the quantity of hypogeous fungi sporocarps”
t0“Allocasuarina”
Claim · model-written summary
Mean fungal genus and species counts increased with Allocasuarina stem counts.
- Taxon
- AllocasuarinaAllocasuarinae0
- Organ / stage
- stemse0
- Outcome
- mean number of fungal genera and speciese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both the mean number of fungal genera and species increased with the number of Allocasuarina stems”
Claim · model-written summary
Mean fungal genus and species counts decreased with Eucalyptus stem counts.
- Taxon
- Eucalyptus
.jpg?width=60)
Eucalyptuse0 - Organ / stage
- stemse0
- Outcome
- mean number of fungal genera and speciese0
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Both the mean number of fungal genera and species increased with the number of Allocasuarina stems, at the same time decreasing with the number of Eucalyptus stems.”
Claim · model-written summary
Authors infer that Allocasuarina presence and abundance favor sporocarp quantity and richness.
- Taxon
- AllocasuarinaAllocasuarinae0
- Organ / stage
- host treese0
- Outcome
- hypogeous fungi sporocarp quantity and sporocarp richnesse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal conditions for promoting hypogeous fungi sporocarp quantity and sporocarp richness appear to be related to the presence and abundance of Allocasuarina (Casuarinaceae) host trees.”
Claim · model-written summary
Authors suggest Allocasuarina may have greater receptivity to ectomycorrhizal fungi.
- Taxon
- AllocasuarinaAllocasuarinae0
- Interactor
- ectomycorrhizal hypogeous fungi speciese0symbiont
- Outcome
- host receptivitye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Allocasuarina tree species may have a higher host receptivity for ectomycorrhizal hypogeous fungi species”