Recent Topics Posters
Nelsen, Mathew P , Will-Wolf, Susan .
How do forest management and vegetation type impact the phylogenetic structure and diversity of lichen communities?
Here we assess how forest management strategies and vegetation type affect phylogenetic structure and diversity of lichen-forming fungi in the Upper Midwest, USA. Plots in even-aged, uneven-aged and old growth northern hardwoods stands were sampled, as well as in uneven-aged and old growth hemlock-hardwoods stands. Analyses were performed for all macrolichens, Parmeliaceae, and Peltigerinae, using presence/absence of species in each of the 5 forest types. Within both vegetation types, macrolichen, Parmeliaceae, and Peltigerinae species richness and phylogenetic diversity were highest within old growth forest. Macrolichens within the northern hardwood old growth forest type were significantly phylogenetically overdispersed. Significantly more Teloschistales species were found in this forest type than expected, while significantly fewer species than expected were from Cladoniaceae. Cluster analysis and PCA using Unifrac distances suggested that forest types from the same vegetation type were more similar than those under the same type of management. Additionally, the P-test demonstrated that the number of differences between forest types was less than expected, suggesting that forest types were significantly clustered on the phylogeny. Within Parmeliaceae, northern hardwoods even-aged and uneven-aged forest types were phylogenetically clustered, suggesting habitat-filtering. When each forest type was compared to all other forest types together, only the hemlock-hardwood old growth forest type was significantly clustered on the phylogenetic tree. Finally, within Peltigerinae, the hemlock-hardwood uneven-aged forest type was significantly phylogenetically clustered (suggesting habitat-filtering), and within this same forest type, significantly more species of the Peltigeraceae/Lobariaceae clade occurred than expected, while significantly fewer species of Collemataceae occurred than expected. Both cluster analysis and PCA using the Unifrac distance metric grouped old growth forest types together, suggesting management strategy is more important than vegetation type for Peltigerinae species. This study illustrates that vegetation type and management strategies affect the phylogenetic diversity and structure of macrolichen communities.
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1 - University of Chicago, Committee on Evolutionary Biology, 1025 E. 57th Street, Chicago, IL, 60637, USA
2 - University of Wisconsin-Madison, Department of Botany, 430 Lincoln Drive, Madison, WI, 53706, USA
Presentation Type: Recent Topics Poster
Location: Event Tent/Cliff Lodge
Date: Tuesday, July 28th, 2009
Time: 5:30 PM