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Effects of Forest Age and Composition on Coleoptera Associated with Fungal Fruiting Bodies in Southwest Ohio

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Effects of Forest Age and Composition on Coleoptera Associated with Fungal Fruiting Bodies in Southwest Ohio EFFECTS OF FOREST AGE AND COMPOSITION ON COLEOPTERA ASSOCIATED WITH FUNGAL FRUITING BODIES IN SOUTHWEST OHIO A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science by JEFFREY M. BROWN B.S.B., Wright State University, 2009 A.S., Sinclair Community College, 2003 2020 Wright State University WRIGHT STATE UNIVERSITY GRADUATE SCHOOL 24 July 2020 I HEREBY RECOMMEND THAT THE THESIS PREPARED UNDER MY SUPERVISION BY Jeffrey M. Brown ENTITLED Effects of Forest Age and Composition on Coleoptera Associated with Fungal Fruiting Bodies in Southwest Ohio BE ACCEPTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Master of Science. _____________________________ John O. Stireman, III, Ph.D. Thesis Director _____________________________ Scott E. Baird, Ph.D. Chair, Biological Sciences Committee on Final Examination: ________________________________ John O. Stireman, III, Ph.D. ________________________________ Volker Bahn, Ph.D. ________________________________ Megan A. Rúa, Ph.D. ________________________________ Barry Milligan, Ph.D. Interim Dean of the Graduate School ABSTRACT Brown, Jeffrey M., M.S., Department of Biological Sciences, Wright State University, 2020. Effects of Forest Age and Composition on Coleoptera Associated with Fungal Fruiting Bodies in Southwest Ohio. Mature forests often harbor greater biodiversity than younger woods. As this relationship of forest age to biodiversity has not been examined for all taxa, this study sought to document the diversity of mycophilous beetle communities in deciduous forests of southwest Ohio and understand how they vary in relation to forest age. I surveyed fungus associated beetles using baited traps at eight forested sites in the Dayton, Ohio region. Traps were surveyed three times during 2018 to account for seasonal variation, something that has not been done for this geographic region. Forest age had no significant effect on beetle abundance or diversity, but mature forests did have a distinct community of beetles. Invasive honeysuckle had a negative effect on beetle abundance and diversity. With this information, more informed decisions may be made with regard to land use and forest management, maintaining existing mature forests and managing invasive species to enhance biodiversity. iii Table of Contents 1. Introduction and Background ..................................................................................... 1 1.1 Background ............................................................................................................................ 1 1.2 Objectives .............................................................................................................................. 6 2. Research Design and Methods ..................................................................................... 7 2.1 Study Area ............................................................................................................................. 7 2.2 Study Design .......................................................................................................................... 9 2.2.1 Baited Traps .................................................................................................................... 9 2.2.2 Site Layout and Sampling Periods ................................................................................ 10 2.2.3 Processing Samples ....................................................................................................... 11 2.2.4 Site Characteristics ........................................................................................................ 12 2.3 Statistical Analysis ............................................................................................................... 13 2.3.1 Rarefaction .................................................................................................................... 13 2.3.2 Linear mixed effects models ......................................................................................... 13 2.3.3 NMDS ........................................................................................................................... 15 2.3.4 Similarity....................................................................................................................... 15 3. Results .......................................................................................................................... 16 3.1 Beetle abundance and richness ............................................................................................ 16 3.2 Effects of Forest Age ........................................................................................................... 20 3.2.1 Site Characteristics ........................................................................................................ 20 3.2.2 Abundance .................................................................................................................... 22 3.2.3 Richness ........................................................................................................................ 24 3.3 Effect of season .................................................................................................................... 25 4. Discussion..................................................................................................................... 30 4.1 Observations ........................................................................................................................ 30 4.2 Conclusion ........................................................................................................................... 34 Appendix .......................................................................................................................... 36 Bibliography .................................................................................................................... 46 iv List of figures 1. Study Sites .......................................................................................................................7 2. Cross vane trap .................................................................................................................9 3. Flight intercept trap placement ......................................................................................10 4. Species accumulation curves .........................................................................................17 5. Family abundance and richness .....................................................................................19 6. Coarse woody debris ......................................................................................................21 7. Honeysuckle interaction plots ........................................................................................23 8. Relationship of richness to abundance ...........................................................................24 9. Effect of season on richness and abundance ..................................................................26 10. NMDS ..........................................................................................................................27 11. Species overlap between old and young sites ..............................................................28 12. Species overlap between sampling periods..................................................................29 v List of tables 1. Richness and abundance of Coleoptera by site ..............................................................16 2. Diversity indices ............................................................................................................18 3. Estimated tree ages ........................................................................................................20 4. Anova results for abundance ..........................................................................................22 5. Anova results for richness ..............................................................................................25 6. Jaccard similarity indices ...............................................................................................28 Appendix A. GPS Coordinates for study locations ..........................................................36 Appendix C. Tree growth factors......................................................................................38 Appendix D. Alphabetical list of species and morphospecies by family ..........................39 Appendix F. Summary tables of generalized mixed models .............................................45 vi 1. Introduction and Background 1.1 Background Biodiversity is the sum of all organisms within a specified ecosystem. It includes both flora and fauna, and is usually measured as the total number of species (richness), but species evenness is also useful in characterizing an ecosystem. One cannot fully appreciate the immensity of biodiversity without accounting for insects, which have over one million described species (Stork, 2018). In particular, Coleoptera, which account for at least one third of all described insect species (Zhang et al., 2018), fulfill diverse ecological roles, such as predators, herbivores, fungivores and detritovores. Greater biodiversity has been found to be associated with more stable and resilient communities that are better able to withstand changes and threats (Hooper et al., 2005). There are many factors that affect biodiversity. Some abiotic factors associated
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