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Abstract Detail

Symbioses: Plant, Animal, and Microbe Interactions

Hayward, Jeremy [1], Hynson, Nicole A. [2].

The species-area relationship of arbuscular-mycorrhizal fungi under biological invasions.

The species-area relationship (SAR) is amongst the most fundamental in ecology and biogeography, and can provide insight into patterns of diversity across spatial scales. The SAR predicts that as sampling area increases there is a corresponding increase in species richness.. The effects of biological invasions on species diversity and richness are frequently scale-dependent, making the SAR an ideal tool for investigating the implications of invasions for biological diversity. However, for cryptic, microbial organisms such as arbuscular-mycorrhizal fungi, there are unique challenges to the evaluation of the SAR. Here, we investigate the effects of aboveground plant invasions on the SAR of their arbuscular-mycorrhizal symbiotic fungi. We used high-throughput Illumina sequencing to sample fungi across invaded and uninvaded sites on the island of Oahu, Hawaii. We accounted for a variety of sources of uncertainty in the SAR using a Bayesian species-area model. We found that invaded sites host a richer assemblage of arbuscular mycorrhizal fungi than uninvaded sites across a variety of spatial scales, but that sites dominated by native plant species accrue arbuscular mycorrhizal fungi slightly more rapidly across space than those dominated by invasive plants. We discuss the implications of this finding for biological invasions involving cryptic microorganisms, and for species-area relationships of microbes relative to other organisms.

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1 - University of Hawaii Manoa, Botany, 3190 Maile Way, Room 101, Honolulu, HI, 96822, USA
2 - University of Hawaii Manoa, Department of Botany, 3190 Maile Way, Room 101, Honolulu, HI, 96822, USA

arbuscular mycorrhizal fungi
biological invasions
species area relationship.

Presentation Type: Oral Paper:Papers for Topics
Session: 51
Location: Salon 5/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 1:45 PM
Number: 51002
Abstract ID:381
Candidate for Awards:None

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