Experimental warming alters rhizosphere fungal composition of two dominant shrubs in Mediterranean-type ecosystem
Presentation
Paper/Presentation Title | Experimental warming alters rhizosphere fungal composition of two dominant shrubs in Mediterranean-type ecosystem |
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Presentation Type | Presentation |
Authors | Birnbaum, Christina, Hopkins, Anna, Fontaine, Joe and Enright, Neal |
Year | 2016 |
Place of Publication | Brazil |
Web Address (URL) of Conference Proceedings | https://cdn.ymaws.com/www.iavs.org/resource/resmgr/meetings/2016-abstract.pdf |
Conference/Event | 59th Annual Symposium of the International Association for Vegetation Science (IAVSD 2016) |
Event Details | 59th Annual Symposium of the International Association for Vegetation Science (IAVSD 2016) 2016: The 59th Symposium of the IAVS Parent Symposium of the International-Association-of-Vehicle-System-Dynamics (IAVSD) Delivery In person Event Date 12 to end of 17 Jun 2016 Event Location Pirenopolis, Brazil Event Web Address (URL) |
Abstract | Climate change will likely impact both the biotic and abiotic drivers in ecosystems and the response of plants and soil microbial communities to these changes. Mediterranean type ecosystems (MTE) are exceptional biomes to test how microbial communities will respond to future drier conditions as MTEs are predicted to experience increased drought and low rainfall. Our aim was to test how increased temperatures and decreased rainfall will impact rhizosphere fungal composition of two dominant shrubs in southwestern Australia across different topographies and treatments. Specifically, we were interested to elucidate how the functional diversity of these fungi (i.e. mutualists vs saprophytes) may be altered following experimental warming and how they may impact the host plant fitness in view of these future environmental changes. Experimental infrastructure was built in 2010 and was designed to create changes in rainfall (reduction by 30%) and temperature (increase by ~2.8°C) that were in accordance with projected climate change scenarios for southwest Australia (Williams, 2014). Two common species in these shrublands, Beaufortia elegans and Melaleuca leuropoma (Myrtaceae), were chosen as host species. Rhizosphere soil samples were collected across two topographies (i.e. dune vs swale), treatments (i.e. drought, temperature and control) and host species (and away from host), giving total N=65. Next generation sequencing was used to identify the rhizosphere fungal composition. Overall, 454 sequencing results revealed that there was a significant interaction between site and host species suggesting that host species accumulate different rhizosphere fungi depending on whether they grow on dune or swale. Furthermore, treatment had a significant effect on rhizosphere fungal composition suggesting that fungal composition differs between drought, increased temperature and control treatments. OTU richness was marginally lower in dunes as compared to swales and significantly lower away from the host species. In conclusion, our results suggest that climate change is very likely to impact rhizosphere fungal composition that may feedback to aboveground plant composition under future drier conditions. |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 410102. Ecological impacts of climate change and ecological adaptation |
410603. Soil biology | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Murdoch University |
https://research.usq.edu.au/item/z96zy/experimental-warming-alters-rhizosphere-fungal-composition-of-two-dominant-shrubs-in-mediterranean-type-ecosystem
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