 |
| Titel |
Modelling and quantifying the effect of heterogeneity in soil physical conditions on fungal growth |
| VerfasserIn |
R. Pajor, R. Falconer, S. Hapca, W. Otten |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 7, no. 11 ; Nr. 7, no. 11 (2010-11-18), S.3731-3740 |
| Datensatznummer |
250005066
|
| Publikation (Nr.) |
 copernicus.org/bg-7-3731-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Despite the importance of fungi in soil ecosystem services, a theoretical
framework that links soil management strategies with fungal ecology is still
lacking. One of the key challenges is to understand how the complex
geometrical shape of pores in soil affects fungal spread and species
interaction. Progress in this area has long been hampered by a lack of
experimental techniques for quantification. In this paper we use X-ray
computed tomography to quantify and characterize the pore geometry at
microscopic scales (30 μm) that are relevant for fungal spread in soil.
We analysed the pore geometry for replicated samples with bulk-densities
ranging from 1.2–1.6 g/cm3. The bulk-density of soils significantly
affected the total volume, mean pore diameter and connectivity of the pore
volume. A previously described fungal growth model comprising a minimal set
of physiological processes required to produce a range of phenotypic
responses was used to analyse the effect of these geometric descriptors on
fungal invasion, and we showed that the degree and rate of fungal invasion
was affected mainly by pore volume and pore connectivity. The presented
experimental and theoretical framework is a significant first step towards
understanding how environmental change and soil management impact on fungal
diversity in soils. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|