Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS14] Biogeochemistry

Wed. May 23, 2018 3:30 PM - 5:00 PM 101 (1F International Conference Hall, Makuhari Messe)

convener:Keisuke Koba(Center for Ecological Research, Kyoto University), Hideaki Shibata(Field Science Center fot Northern Biosphere, Hokkaido University), Naohiko Ohkouchi(海洋研究開発機構, 共同), Youhei Yamashita(Faculty of Environmental Earth Science, Hokkaido University), Chairperson:Koba Keisuke(Kyoto University), Fujii Kazumichi, Sunamura Michinari

3:45 PM - 4:00 PM

[MIS14-14] Changes in climate cause important functional changes at the soil fungal community

*Carles Castaño1,2, Björn Lindahl3, Josu G Alday1, Andreas Hagenbo3, Juan Martínez de Aragón4, Javier Parladé5, Joan Pera5, José Antonio Bonet4,1 (1.University of Lleida. Department of Crop and Forest Sciences, 2.Forest Bioengineering Solutions S.A., 3.Swedish University of Agricultural Sciences, Department of Soil and Environment, 4.Centre Tecnològic Forestal de Catalunya, CTFC-CEMFOR, 5.Protecció Vegetal Sostenible, IRTA, Centre de Cabrils)

Keywords:climate change, drought, ergosterol, fungal community, mycorrhizal

Changes in soil climate can regulate fungal community composition and structure in Mediterranean forests. Here, we studied spatio-temporal changes of the soil fungal communities in a Mediterranean Pinus pinaster forest and we correlate community shifts with changes in soil moisture and temperature.

Here, we studied the fungal communities in 336 soil samples collected monthly during a year from 28 long-term experimental plots. Fungal community was studied by PacBio sequencing of ITS2 amplicons and standing fungal biomass was quantified by analysing ergosterol. Fungal community was taxonomically described at species, functional and fungal trait level.

Summer months and late winter registered the lowest soil fungal biomass whereas autumn registered the greatest biomass, coinciding with a greater relative abundance of mycorrhizal species. Spatio-temporal changes in community composition correlated significantly with changes in soil moisture and temperature. Relative proportions of mycorrhizal fungi were increased under drought conditions, in comparison with free-living fungi. Mycorrhizal species with short distance exploration type increased in relative abundance under dry conditions, whereas species with long exploration type were more abundant under wetter conditions.

We show compositional and functional changes in fungal communities correlated with changes in climatic conditions. Free-living fungi could be negatively affected by increasing droughts in Mediterranean forest ecosystems.