Overlapping niches of Beauveria bassiana in a conifer forest

Roy, Helen ORCID: https://orcid.org/0000-0001-6050-679X; Pell, J. K.; Thomas, A. P. M.; Ormond, E. L.. 2009 Overlapping niches of Beauveria bassiana in a conifer forest. [Lecture] In: 42nd Annual Meeting of the Society for Invertebrate Pathology, Park City, Utah, 16-20 August 2009.

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Official URL: http://utahsip.org/agendadetails.cfm?aid=74

Abstract/Summary

There is limited information on the spatial distribution and diversity of Beauveria bassiana s.l. in above-ground locations. The occurrence of B. bassiana s.l. in a conifer forest was assessed in October, March and June 2006 through collection of samples from soil, branches and bark and isolation onto selective media. The density of B. bassiana s.l. was greater in soil (up to mean (SE) 148.9 (15.5) CFUs per gram) compared to bark (up to mean (SE) 28.8 (14.8) per gram). For branch samples the mean (SE) number of CFUs ranged from 0.0 (0.0) to 42.3 (9.9) per 2 cm low branch and from 0 (0) to 37.3 (16.9) per 2 cm mid branch. In all samples B. bassiana s.l. showed a temporal decline from October to June and was completely absent from the conifer branch samples in June. More extreme environmental conditions above-ground compared to below-ground are likely to be the major factor contributing to this decline. Molecular analyses (Inter Simple Sequence Repeat PCR (ISSR-PCR)) indicated that B. bassiana s.l. is genetically diverse and there appears to be distinct isolates associated with microhabitats and time; there were separate genetically related clusters of isolates originating from the soil or tree location and separate clustering of October, March and June isolates. Some isolates were ubiquitous in above and below-ground locations. The occurrence of B. bassiana s.l. isolates above and below-ground suggests that this fungus occupies various overlapping niches. The heterogeneous nature of the conifer forest provides a model system for studying the population dynamics of this fungus.

Item Type:	Publication - Conference Item (Lecture)
Programmes:	CEH Topics & Objectives 2009 - 2012 > Biodiversity > BD Topic 1 - Observations, Patterns, and Predictions for Biodiversity > BD - 1.1 - Standards for data collection, quality, management and integration ... CEH Topics & Objectives 2009 - 2012 > Biodiversity > BD Topic 2 - Ecological Processes in the Environment > BD - 2.1 - Interactions ... structure ecosystems and their functioning CEH Topics & Objectives 2009 - 2012 > Biodiversity > BD Topic 1 - Observations, Patterns, and Predictions for Biodiversity > BD - 1.2 - Data collection systems to record and assess changes ... CEH Topics & Objectives 2009 - 2012 > Biodiversity > BD Topic 1 - Observations, Patterns, and Predictions for Biodiversity > BD - 1.3 - Long-term/large-scale monitoring and experiments ...
UKCEH and CEH Sections/Science Areas:	Pywell
NORA Subject Terms:	Zoology Ecology and Environment
Date made live:	18 Feb 2010 15:45 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/8339

Item Type:

Publication - Conference Item (Lecture)

Programmes: