Effect of Habitat Structure on Reproduction and Prey Capture of Pinguicula Lutea a Rare Carnivorous Plant
Effect of Habitat Structure on Reproduction and Prey Capture of Pinguicula lutea a Rare Carnivorous Plant
Samantha B. Primer, University of Illinois (UIUC) Brenda Molano-Flores, Illinois Natural History Survey Jenna Annis, Eastern Illinois University Janice Coons, Eastern Illinois University Mary Ann Feist, University of Wisconsin-Madison
Habitat Modification
TIME Habitat Modification Plant-Insect Interactions Plant-Insect Interactions Carnivorous Plants
“This plant, commonly called Venus’ fly-trap…is one of the most wonderful in the world.” Carnivorous Plants
“This plant, commonly called Venus’ fly-trap…is one of the most wonderful in the world.” …But So Much More Pinguicula lutea
Family: Lentibulariaceae
Common Name: Yellow Butterwort
Status: Threatened in FL Habitat Structure
Maintained Grassy Woody
• Cover class determined (% cover) using Daubenmire method • At each site, 5 1m2 quadrats were established along alternating sides of 30m transect. • At each site, 10 buds were randomly marked, monitored for fruit development. Ellison graph instead
Pinguicula spp. Characteristics
anthers receptacle
stigma
nectar spur Ellison graph instead
Pinguicula spp. Characteristics
leaf margin
sessile gland stalked gland Overarching Question
Does habitat structure affect plant-insect interactions of Pinguicula lutea?
Overarching Question
Does habitat structure affect plant-insect interactions of Pinguicula lutea?
Background Information:
1. Determine reproductive ecology
2. Survey arthropod abundance and prey capture
Reproductive Ecology Previous Research
Breeding System Pollinator Observations
Pollen : Ovule Low High Reproductive Ecology Summary Floral Morphology Suggest Insect vector
Breeding System Self-compatible, pollen vector required
Pollinator Observations Insect vector on video
Pollen to Ovule Ratio Consistent with facultative selfing
Prey Community Previous Research
Treat. 1876. The Harper’s Monthly. Gibson.1991. American Midland Naturalist. Prey Community Summary
Prey Capture Main prey are Collembola and Diptera Collembola is most common
Arthropod Availability Collembola and Diptera most abundant Some available Diptera too large trap Overarching Question
Does habitat structure affect reproduction and prey capture of Pinguicula lutea?
Background Information:
1. Determine reproductive ecology
2. Survey arthropod abundance and prey capture
1. Determine reproduction and prey capture in three habitat structures
Cover class determined (% cover) At each site, 5 1m2 quadrats were established along alternating sides of 30m transect.
• Reproduction – Fruit Set – Seed Set • Prey Capture Determining Structure • Prey Availability
Vegetation Surveys • Total sites = 13
1m2 quadrats established Cover class determined (% cover)
Quadrats = 5 Sites = 13
Cover class determined (% cover) At each site, 5 1m2 quadrats were established along alternating sides of 30m transect.
• Reproduction – Fruit Set – Seed Set • Prey Capture Determining Structure • Prey Availability
• Total sites = 13 Maintained
Grassy
Woody Reproduction
Fruit Set Seed Set
N = 10 Sites = 13
Fruit Set
Final Fruit Set 1 0.8 0.6 0.4 0.2 0 Proportion Fruits of Formed Proportion maintained grassy woody
ANOVA
F = 0.57, P = 0.58
Seed Set
Seed Set
0.95 0.9 0.85 0.8 0.75
maintained grassy woody Proportion Seeds of Set Proportion
ANOVA: F = 1.54, p = 0.22
Habitat Structure on Reproduction
Habitat structure does not affect reproductive success
High fruit set
High seed set Prey Community Assessment
Prey Capture Arthropod Availability
N = 5 Sites = 13 12 Arthropod Availability 10 8 12 Maintained 6 10 Grassy 4 8 Woody Maintained 2 6 Grassy 0 4 Woody Total Colembola Diptera
Mean Mean # Arthropods 2 0 Total Collembola Diptera
ANOVA: F = 4.66, p = 0.01 F = 4.3, p = 0.02 F = 38.7,p <0.001
5 Prey Capture 4 3
5 Maintained 2 4 Grassy Woody
1 3 Maintained 2 Grassy 0 Woody
Total 1 Collembola Diptera Mean Mean # Arthropods 0 Total Collembola Diptera
ANOVA: F = 26.0, p <0.001 F = 30.18, p <0.001 F = 16.45, p <0.001
Habitat Structure on Prey Capture
Habitat structure does affect prey capture and availability
Microclimatic Conditions Light Availability Temperature Humidity Habitat Structure on Prey Capture
Habitat structure does affect prey capture and availability
Microclimatic Conditions Light Availability Temperature Humidity
Arthropods Trapping Mechanism Habitat Structure on Prey Capture
Microclimate affecting insects
Microclimate affecting trapping mechanism
Temperature humidity moisture
F
Zamora.1995. Oikos. Habitat Structure on Prey Capture
So I’ve established the patterns of these plant insect interactions In Summary….
• First comprehensive study of plant-insect interactions for SE Pinguicula spp. First comprehensive study of plant-insect interactions for SE Pinguicula spp. • In a fire dependent community these findings provide insight into how this species response to changes in habitat structure… i.e. What management or lack of management could mean for this species
• Provides evidence that’s presents or absence of management does not seems to have an impact in terms of reproduction; however there are differences in terms of prey capture. In Summary….
First comprehensive study of plant-insect interactions for SE Pinguicula spp.
Provides insight into how this species respond to • In a fire dependent community these findings provide insight into changeshow this in species habitat responds structure to changes in habitat structure… i.e. What management or lack of management could mean for this species
• Provides evidence that’s presents or absence of management does not seems to have an impact in terms of reproduction; however there are differences in terms of prey capture. In Summary….
First comprehensive study of plant-insect interactions for SE Pinguicula spp.
Provides insight into how this species responds to changes in habitat structure
Presence/absence of management may impact prey capture. Acknowledgements
COAUTHORS FIELD ASSISSTANTS/ HELP FLORIDA FOREST SERVICE Brenda Molano-Flores Caroline George Michael Jenkins Jenna Annis Jean Mendelkoch David Morse Janice Coons Kevin Christman Mary Ann Feist Melissa Primer US FISH AND WILDLIFE Bill Booth Vivian Negron-Ortiz BMF LAB Robin Kennedy Danielle Ruffatto BUFFER PRESERVE David N. Zaya TYNDALL AIRFORCE BASE Dylan Shoemaker Ian Pearse Wendy Jones Barry Townsend Charlie Helm Sandra Chafin ST. JOE COMPANY Allix North UNDERGRADUATE HELP Jim Moyers Lisa Duglecki Marialicia Chavez Max & Pat Prucell MASTER NATURALISTS Dave & Joy Peterson