Jonathan H. Titus
Department of Biology
1999 - Postdoctoral Fellow. University of Nevada, Las Vegas, NV. Research: Effects of global change on Mojave Desert plant communities.
1997 - Postdoctoral Fellow. University of South Bohemia, České Budějovice, Czech Republic. Research: Arbuscular mycorrhizae responses to fertilization, mowing and species removals in a diverse oligotrophic wet meadow.
1995 - Ph.D. University of Washington, Seattle, WA. Department of Botany. Dissertation title: The role of mycorrhizae in primary succession on Mount St. Helens. Advisor: Dr. Roger del Moral.
1987 - M.S. University of Florida, Gainesville, FL. Department of Botany. Thesis title: The effect of microtopography on seedling regeneration in a Florida hardwood floodplain swamp. Advisor: Dr. Francis E. Putz.
1983 - B.S. Union College, Schenectady, NY. Biology, with honors.
Current Course Offerings at Fredonia
BIOL115 - Environmental Biology
Research Interests: Plant Ecology
I am a field ecologist and most of my current research takes place outside in the natural areas of western New York. A major threat to these natural areas is the introduction and establishment of aggressive non-native species such as garlic mustard and Japanese knotweed. I investigate the effects that these invasive non-native plant species have on our native plant communities and on mutualisms between plants and fungi. To do this I establish and study permanent survey plots for many consecutive years and assess the effects these invasive species have on the ecosystem.
The Emerald ash borer is an insect introduced from East Asia that kills 100% of our infected native ash trees within just two years of colonization. Although the emerald ash borer is widespread throughout Ohio, it has only begun to colonize New York. In order to document the effects this species will inevitably precipitate on our forests, I have established a network of permanent plots in ash swamp forests across the County. Thus, I will be able to observe and document changes that occur when this insect first begins to colonize Chautauqua County forests. I am interested in the responses of both the tree canopy and understory species in response to the death of the ash trees, and will be able to compare it to the pre-borer data. The plot data gathered thus far has already yielded interesting information about forest structure in swamp forests.
The SUNY-Fredonia College Lodge Nature Preserve comprises 80 hectares of high quality forest 12 km from campus. In order to better understand and manage the forest, a detailed Biological Inventory is currently underway. This includes surveys of animals, plants, fungi, and all other forms of life. Currently several students are helping me survey and characterize the vegetation types, inventory all the plant species, and map and devise management strategies for invasive plant populations in the preserve.
In western New York and Pennsylvania, ancient sand dunes support a rare plant community called black oak savanna, although very few remnants of this plant community remain. In order to increase our understanding of this endangered plant community and assist in restoration efforts, I am conducting a seedbank study in two different representations of this community type. A seedbank study involves determining the species composition of viable seeds present in the soil.
At the Jamestown Audubon Bergeson Sanctuary, a pilot project was initiated in 2007 to examine the impact of deer herbivory on forest understory vegetation. This involved the construction of a deer exclosure (an area surrounded by a high fence which deer cannot enter) and establishment of corresponding comparison plots. The effects of deer are visibly dramatic between the inside of the deer exclosure and outside, where the vegetation is subjected to intense deer herbivory. Preliminary data has documented several native species that are recovering within the deer exclosure but are uncommon outside of the exclosure. In the future I intend to install additional deer exclosures.
Titus, J.H. and J.G. Bishop. 2014. Competition with N-fixing colonists decreases survival of Douglas-fir seedlings on primary successional sites at Mount St. Helens, Washington. Journal of Vegetation Science. Accepted.
del Moral, R. and J.H. Titus. 2014. Primary Succession on Mount St. Helens: Rates, Determinism and Alternative States. In: V.H. Dale & C. H. Crisafulli (eds.), Ecological Responses Revisited 35 years after the 1980 Eruptions of Mount St. Helens. Springer-Verlag, New York. Accepted.
Titus, J.H, P.J. Titus, M. Laituri and B. Sethebe. 2012. Population Structure of an Arborescent Aloe (Aloe marlothii) in Botswana. African Journal of Plant Science 6:328-336. http://www.academicjournals.org/AJPS/PDF/Pdf2012/Oct/Titus%20et%20al.pdf
Staunch, A., M. Redlecki, J. Sleeper, J. Wooten and J.H. Titus. 2012. Moss and Soil Substrates Interact with Moisture Level to Influence Germination by three Wetland Tree Species. ISRN Botany 2012. http://www.isrn.com/journals/botany/aip/456051/
Titus, J.H. and P.J. Titus. 2011. Recovery Plan for the Huachuca water umbel (Lilaeopsis schaffneriana ssp. recurva). Agency Review Draft. U.S. Fish and Wildlife Service. Tucson AZ. 74 pp.
Bishop, J.G,. N.B. O’Hara, J.H. Titus, J.L. Apple, R.A. Gill, L. Wynn. 2010. N-P Co-Limitation of Primary Production and Response of Arthropods to N and P in Early Primary Succession on Mount St. Helens Volcano. PLoS ONE 5:e13598. www.plosone.org.
Tsuyuzaki, S. and J.H. Titus. 2010. Roadside grassland vegetation in an oak forest, Oak Creek Wildlife Area, the Cascade Range, USA. iForest 3: 52-55. http://www.sisef.it/iforest/ doi.php?doi=10.3832/ifor0527-003.
Blood, L.E. and J.H. Titus. 2010. Microsite effects on forest regeneration in a bottomland swamp in western New York. Journal of the Torrey Botanical Society 137:88-102.
Blood, L.E., H.J. Pitoniak and J.H. Titus. 2010. Seed bank of a bottomland swamp in western New York. Castanea 75:19-38.
Titus, J.H. 2009. Nitrogen-fixers Alnus and Lupinus increase soil fertility but not invasion by late successional species in primary succession on Mount St. Helens. Plant Ecology 203:289–301.
Titus, J.H. and P.J. Titus. 2008. Assessing the reintroduction potential of the endangered Huachuca water umbel in Southeastern Arizona. Ecological Restoration 26:311-321.
Titus, P.J. and J.H. Titus. 2008. Ecological monitoring of the endangered Huachuca water umbel (Lilaeopsis schaffneriana ssp. recurva: Apiaceae). Southwestern Naturalist 53:458-465.
Titus, J.H. and P.J. Titus. 2008. Seedbank of Bingham Cienega, a spring-fed marsh in southeastern Arizona. Southwestern Naturalist 53:393-399.
Titus, J.H. 2008. Inventory of the vascular flora of Mount St. Helens’ crater. Northwest Science 82:76-81.
Titus, J.H., S. Whitcomb and H.J. Pitoniak. 2007. Distribution of arbuscular mycorrhizae in relation to microsites on primary successional substrates on Mount St. Helens. Canadian Journal of Botany 85:941-948.
Titus, J.H. and E. Householder. 2007. Salvage logging and replanting reduce understory cover and richness compared to unsalvaged unplanted sites at Mount St. Helens, Washington. Western North America Naturalist 67:219-231.
del Moral, R., D.M. Wood and J.H. Titus. 2005. Proximity effects, microsites and biotic interactions during early succession. In: V.D. Dale, F.J. Swanson and C.M. Crisafulli (eds.), Ecological Responses to the 1980 Eruption of Mount St. Helens. Springer, New York. Pp. 93-110.