Identifying Key Components of Interaction Networks Involving Greater Sage Grouse
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Identifying Key Components of Interaction Networks Involving Greater Sage Grouse Sarah Barlow and Bruce Pavlik Conservation Department Red Butte Garden and Arboretum Salt Lake City, Utah 84105 Vegetation Forb seed Pollinators collections GSG Insects (chick diet) Chick Survivorship Linked to Vegetation Structure and Food Resource Abundance Gregg and Crawford 2009 J. Wildlife Man. 73:904-913 Astragalus geyeri Microsteris gracilis (Phacelia gracilis) https://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Microsteris_gracilis_1776.JPG/220px-Microsteris_gracilis_1776.JPG Agoseris heterophylla Achillea millefolium Taraxacum officinale Bransford, W.D. & Dophia http://www.americansouthwest.net/ Literature Survey: Forbs and Insects as Essential Foods Reference Field Site Insect Foods Forb Foods Achillea, Agoseris, Astragalus, Pennington et al. 2016 Review 41 invert taxa, Coleoptera, Hymenoptera, Lactuca, Orthoptera Taraxacum, Trifolium, Lepidium Greg and Crawford 2009 NW Nevada Lepidoptera larvae especially strong Microsteris gracilis relation to SB "productive forbs" not at Thompson et al. 2006 Wyoming > 3<11 cm Hymenoptera, Ants, Coleoptera expense of sagebrush cover Drut, Crawford, Gregg 1994 Oregon Scarabs, Tenebrionids, ants w/ high occurrence Drut, Pyle and Crawford June beetles most preferred on all sites, Agoseris, Astragalus, Crepis, 1994 Oregon then Microsteris Tenebrionids and ants (by mass & freq) Trifolium (by mass & freq) Orthoptera, Coleoptera, Hymenoptera (by Peterson 1970 Montana vol & freq) Taraxacum, Tragopogon, Lactuca (by vol & freq) Klebenow and Gray Ants, Tenebrionids, Chrysomelids (by freq & Taraxacum, Tragopogon, 1968 Idaho vol) Calochortus, Astragalus (by freq & vol) Hemileuca hera (Lepidoptera) Eleodes (Tenebrionidae) Polyphylla (Scarabaeidae) Chrysomela (Chrysomelidae) Strawberry Reservoir , Wasatch County, UT Florida Canyon, Pima Co., AZ Oldtown, Bonner County, ID Lyons, Boulder County, CO Copyright © 2009 Glassman Copyright © 2012 Mark H Brown Copyright © 2013 Suzanne Endres Copyright © 2015 Lynn Monroe Anabrus simplex (Orthoptera) Hymenoptera Pogonomyrmex (Hymenoptera) Austin, Lander County, NV Big Gypsum Valley nr Utah border, San Miguel Co, CO Boulder, Boulder County, CO Copyright © 2013 Sam McNally Copyright © 2012 Derek Uhey Copyright © 2015 Lynn Monroe Tom Keorner Tri-Trophic Networks Odono Lepido Orthop Scarab 1 Scarab 2 Tenebri 1 Tenebri 2 Eriogonum Astragalus Microsteris Achillea Lupinus Taraxacum Tom Keorner Pollinator Network Bee 1 Bee 2 Bee 3 Bee 4 Bee 5 Eriogonum Astragalus Microsteris Achillea Lupinus Taraxacum Correlations of robustness between groups in the interaction network GSG chick diet Forbs Study Sites X Forbs X Pitfall traps X 100m Pollinators X Rana LEK X 3 mile nesting zone Vegetation Vegetation description Achillea millefolium Microsteris gracilis (Phacelia gracilis) Agoseris heterophylla Astragalus geyeri Using Rana to Document Plant-Insect Interactions • Pollination – essential for self-maintaining forb populations • Herbivory – attracting and supporting insect foods Rana video capture Forb seed collections for restoration Expected outcomes • Network interactions • Are they site-specific? • Key network components? Keystones? • Robustness? • Pollinator Support Evaluation • Comparison of Pollinator Support Indices between forb species and sites • Native forb seed collections nwf.org • Inform restoration forb seed mix • Site-specific restoration management (target plant taxa, increase forb and insect diversity, pollinator support, seed zones).