The Illinois Native Plant Society is pleased to announce four awards from the 2019 Research Grant Program. All four awardees are graduate students at their institutions.
David Barfknecht, Southern Illinois University
Project: Biodiversity, Community Structure Shifts, and Exotic Invasion in Xeric Forest Openings
With the funds awarded by the INPS, I will be re-conducting vascular plant surveys based on species occurrence and abundance in several natural xeric forest openings throughout southern Illinois which were originally sampled in the early 1990s. The goals of this research are to investigate temporal changes in diversity, species composition, and exotic invasion. In addition, several soil, moisture, and light parameters will be re-recorded to assess whether these variables are related to targeted temporal shifts. The research will be conducted during the summer of 2019. This research is part of a larger project including a component specifically investigating similar properties in hill prairies.
Matthew Evans, Northwestern University and Chicago Botanic Garden
Project: Assessment of Vernal Pool Soil Seed Banks
Vernal pools, or “spring” pools, are a conservation priority in the Midwest because due to their ephemeral nature they support unique assemblages of biodiversity. Many native plant species have developed adaptations to the fluctuating hydrology of vernal pools and the decline of their habitat has left them with few options to thrive in Illinois woodlands that suffer from the invasion of European shrubs. Fortunately, vernal pools that appear devoid of vegetation may harbor a legacy of their past plant communities under your feet in the soil seed bank. My research aims to inform land managers of the restoration potential of vernal pool soil seed banks in re-establishing native vegetation in these unique and charismatic habitats.
Lauren Lynch, University of Illinois at Urbana-Champaign
Project: Effects of Pollinator Gardens on Native Bees on an Urban-Rural Gradient
As the impacts of bee declines on the conservation of native plants and the functioning of healthy ecosystems have become apparent, public involvement in pollinator conservation efforts has increased dramatically. One strategy often used by community members to contribute to bee conservation efforts is the planting of pollinator gardens. However, despite the prevalence of pollinator gardens, their effectiveness as a conservation strategy has not been formally evaluated. In this study, we will investigate the effects of pollinator gardens on native bee populations by comparing the bee communities present in pollinator gardens to those present in other types of green spaces in the greater Chicago area.
Jesse Smith, Illinois State University
Project: Tallgrass vs. Hill Prairies: Floral Traits and Habitat Size Influence Pollinator Diversity
Remnant prairies are unique in that their soil microbial communities are preserved and thus the plant microbe interactions in the soil. Soil nutrients are known to affect plant growth and floral displays; however, soil microbial communities may improve (mycorrhizal fungi) or hinder (pathogen) growth or nutrient uptake. Bees are key pollinators for prairie plant species, while research shows a decline of many native bee populations. Through quantifying floral displays, sampling and behavioral observations of bees, I will test my hypotheses that floral displays of the tallgrass prairies are larger than hill prairies due to greater availability of soil nutrients and microbial community. I predict this larger floral display would affect the abundance and diversity of bee pollinators to the particular plant species. This research could assist in management of reconstructed prairies as well as remnant prairies.
Jesse Smith’s award is funded by the Central Chapter of the Illinois Native Plant Society because the project takes place primarily in the counties included in the Central Chapter. However, the project met criteria through the State INPS Research Grant Program and is considered a State award. We appreciate the Central Chapter’s contribution to the Grant Program.
Anna Braum. The Wetlands Initiative. Investigating the spatial distribution and population characteristics of Mimulus glabratus var. jamesii (yellow monkey flower) in an Illinois seep.
The yellow monkey flower (Mimulus glabratus var. jamesii (Scrophulariaceae), is an Illinois endangered species, the habitat of which is limited to seeps in the northern and central counties of the state. The PI and the Wetlands Initiative will be studying this species at one of the few remaining locations where it is known to occur in Illinois. We will be mapping the population’s spatial distribution, estimating the population’s size and reproductive capacity, and conducting plant community surveys in order to characterize the habitat in which the species grows and to assess invasive species threats. These data will contribute to the appropriate management and conservation of this endangered species and its rare habitat in Illinois.
Emily Dangremond. Roosevelt University (Assistant Professor working with students and volunteers): Genetic diversity and phenology in Illinois starflower populations.
Starflower (Lysimachia borealis, formerly Trientalis borealis) is a boreal understory herb with some of its southernmost populations occurring in northern Illinois. Temperature may be important for setting the range limit for this species, and starflower is at risk of extirpation from Illinois due to climate change. This study will examine how genetic diversity is distributed in at-risk Illinois starflower populations using microsatellite markers. It will also examine the relationship between temperature and phenology and fecundity in starflower populations. Results will be made available to land managers, who may wish to use this information in conservation planning.
Samantha Jo Danguilan. Chicago Botanic Garden and Northwestern University (graduate student): Does variation in flowering phenology affect reproductive success?
The ecological effects of earlier and later flowering time are key to understanding how plants synchronize with other organisms. However, we know little about the fundamental biological effects of earlier and later flowering on plant reproductive success. Using a pollinator-observational study combined with hand-pollination treatments that looks at flowering in Claytonia virginica (spring beauty), I seek to assess how variation in flowering phenology, within an individual and at a population level, can affect seed production and germination. Understanding how natural variation in flowering time alters reproductive success gives us the foundation for recognizing how climate change might further exaggerate these reproductive consequences.
Jessamine Finch. Chicago Botanic Garden and Northwestern University (graduate student): How does the native plant production process affect the genetic diversity of restorations? A comparison of wild and commercially sourced milkweed (Asclepias spp.).
Many restoration efforts source plant material from native plant producers. However, commercial material may significantly differ from wild-collected material, because of genetic changes resulting from the production process and/or limited regional vendors. To ensure that habitat restorations mirror the health and resilience of natural populations, we must understand the baseline genetic diversity and structure of wild populations, and how they compare to commercial sources. To investigate potential changes in genetic diversity, I am conducting a germination experiment and molecular genetic study for wild populations and commercial seed lots of three priority restoration species: Asclepias incarnata (swamp milkweed), A. syriaca common milkweed), and A. verticillata (whorled milkweed).
Jessica Fowler. Illinois State University (graduate student): Invasion of silky bush clover (Lespedeza cuneata) in midwest prairies.
This State INPS award has been funded through the Central Chapter of the Illinois Native Plant Society
Lespedeza cuneata (silky bush clover) is a non-native legume, introduced as forage crop and cover from China. It establishes dense stands of chemically-defended foliage that inhibit digestion of insect herbivores. It has invaded a reconstructed tallgrass prairie in Hudson, Illinois, where it has been spreading and increasing in abundance over the last ten years. This summer, I will evaluate how removing L. cuneata affects intensity of herbivory on competing species by photographing leaves and using an image analysis software. Understanding the effects of L. cuneata on native communities can inform management decisions to limit its spread, which could increase diversity.
Publications: Japanese Beetles May Promote an Invasive Plant’s Advance, The Harbinger, Vol. 36, No. 3
Dr. Cecilia Hennessy. Eureka College (Assistant Professor working with students): Influence of life history and ecosystem connectivity on genetic isolation of prairie plants in original prairie remnants.
The degree to which genetic isolation and drift correspond to the geographic isolation of prairie plants in small, scattered habitat remnants likely depends on life-history factors. Using microsatellite DNA markers, we will measure genetic diversity and isolation in original prairie remnants for species with varying pollination mechanisms and life histories, including little bluestem (Schizachyrium scoparium), pasture thistle (Cirsium discolor), and pale purple coneflower (Echinacea pallida). We will also assess evidence of gene flow among preserved prairie remnants near railroads to test whether the narrow grassland habitat corridors along railroad tracks help remnant native plant populations maintain gene flow.
Katherine Wenzell. Chicago Botanic Garden and Northwestern University (graduate student): Investigating genetic diversity and inbreeding of the state-endangered downy paintbrush (Castilleja sessiliflora).
Downy paintbrush (Castilleja sessiliflora) is endangered in Illinois but secure throughout the rest of its range in the central United States. C. sessiliflora is thought to be self-incompatible, which can threaten the persistence of small, isolated populations which may become too genetically similar to reproduce. To assess the genetic health of populations of C. sessiliflora, this project will compare genetic diversity and inbreeding among populations in Illinois compared to the rest of the range. This study will shed light on whether low genetic diversity in the region could threaten the persistence of C. sessiliflora in Illinois.
Jack Zinnen. University of Illinois at Champaign-Urbana (graduate student): Assessing conservatism among wetland plants: measuring plant traits, response to mycorrhizal inoculation, and nutrient pulses.
We are grateful to receive funding from the INPS to pursue our greenhouse project investigating the ecological properties of conservatism, the core component of Floristic Quality Assessment. Conservatism characterizes a species’ relative tolerance to anthropogenic disturbance. Our project will measure the functional traits of native Illinois wetland/wet prairie plants to better-characterize the physiological patterns of conservative and non-conservative species. We will additionally expose our study species to two experimental treatments, arbuscular mycorrhizal fungi inoculation and artificial nutrient pulses (i.e. fertilizer additions), to further our understanding of how they might respond to processes in natural settings. We look forward to the results of this project and are grateful to the INPS for fostering the study and appreciation of our native flora.