Effect of Habitat Structure on Reproduction and Prey Capture of Pinguicula lutea a Rare Carnivorous Plant

Transcription

1 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

2 TIME Habitat Modification

3 Habitat Modification

4 Plant-Insect Interactions

5 Plant-Insect Interactions

6 Carnivorous Plants This plant, commonly called Venus fly-trap is one of the most wonderful in the world.

7 Carnivorous Plants This plant, commonly called Venus fly-trap is one of the most wonderful in the world.

8 But So Much More

9 Pinguicula lutea Family: Lentibulariaceae Common Name: Yellow Butterwort Status: Threatened in FL

10 Habitat Structure Maintained Grassy Woody

11 Pinguicula spp. Characteristics anthers receptacle stigma nectar spur

12 Pinguicula spp. Characteristics leaf margin sessile gland stalked gland

13 Overarching Question Does habitat structure affect plant-insect interactions of Pinguicula lutea?

14 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

15 Reproductive Ecology Previous Research Breeding System Pollinator Observations Low Pollen : Ovule High

16 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

17 Prey Community Previous Research Treat The Harper s Monthly. Gibson American Midland Naturalist.

18 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

19 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

20 Determining Structure Vegetation Surveys 1m 2 quadrats established Cover class determined (% cover) Quadrats = 5 Sites = 13

21 Determining Structure Maintained Grassy Woody

22 Reproduction Fruit Set Seed Set N = 10 Sites = 13

23 Proportion of Fruits Formed Fruit Set Final Fruit Set maintained grassy woody ANOVA F = 0.57, P = 0.58

24 Proportion of Seeds Set Seed Set Seed Set maintained grassy woody ANOVA: F = 1.54, p = 0.22

25 Habitat Structure on Reproduction Habitat structure does not affect reproductive success High fruit set High seed set

26 Prey Community Assessment Prey Capture Arthropod Availability N = 5 Sites = 13

27 Mean # Arthropods Arthropod Availability Maintained Grassy Woody 6 4 Total 2 Colembola Diptera 0 Total Collembola Diptera Maintained Grassy Woody ANOVA: F = 4.66, p = 0.01 F = 4.3, p = 0.02 F = 38.7,p <0.001

28 Mean # Arthropods Prey Capture 5 Maintained Total Collembola Diptera 1 Grassy Woody 0 Total Collembola Diptera Maintained Grassy Woody ANOVA: F = 26.0, p <0.001 F = 30.18, p <0.001 F = 16.45, p <0.001

29 Habitat Structure on Prey Capture Habitat structure does affect prey capture and availability Microclimatic Conditions Light Availability Temperature Humidity

30 Habitat Structure on Prey Capture Habitat structure does affect prey capture and availability Microclimatic Conditions Light Availability Temperature Humidity Arthropods Trapping Mechanism

31 Zamora Oikos. Habitat Structure on Prey Capture F

32 Habitat Structure on Prey Capture

33 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.

34 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 changes how 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.

35 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.

36 Acknowledgements COAUTHORS Brenda Molano-Flores Jenna Annis Janice Coons Mary Ann Feist BMF LAB Danielle Ruffatto David N. Zaya Ian Pearse Charlie Helm UNDERGRADUATE HELP Marialicia Chavez FIELD ASSISSTANTS/ HELP Caroline George Jean Mendelkoch Kevin Christman Melissa Primer Bill Booth Robin Kennedy TYNDALL AIRFORCE BASE Wendy Jones ST. JOE COMPANY Jim Moyers MASTER NATURALISTS FLORIDA FOREST SERVICE Michael Jenkins David Morse US FISH AND WILDLIFE Vivian Negron-Ortiz BUFFER PRESERVE Dylan Shoemaker Barry Townsend Sandra Chafin Allix North Lisa Duglecki Max & Pat Prucell Dave & Joy Peterson