Open Space Advisory Board Agenda and Packet 2015 10 14

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Open Space Advisory Board Minutes September 9th 2015 Page 3 of 7 rather than punitive. The boundary of the historical district is Old Town (delimitated specifically in the Master Plan). Laura expressed some concern about sign clutter on Open Space property and pointed out that Open Space has been working on sign design and color pallet as part of the wayfinding initiative. She didn't want to see two separate sign systems on Open Space or too many signs, when reducing sign clutter was identified as an important goal by OSAB during the wayfinding process. Lauren and Ember both responded that they are in communication about any signs for Open Space property and can be sure to work in concert also the sign design developed in the Open Space Wayfinding project will be used for a consistent look. Lauren reported that she's presented the Draft Preservation Master Plan to BRAD, the City Council, the Sustainability Board, the Down Town Business District, the Planning Commission, the Revitalization board, and a realtor group. Lauren said that she will present this document to City Council on October 6th. Lauren asked for people's further comments via email. laurent @louisvillego.gov IX. Discussion Item: Predation of Larval Lepidoptera in Habitat Fragments Varies Spatially and Temporally But is Not Affected by Light Pollution Presented by: Kylee Grenis, Graduate Student, University of Denver Kylee is a graduate student who has done field work on Louisville Open Space that has just been published as a research article in the Journal of Insect Conservation (May 2015). She began her presentation by talking about how habitat fragmentation has been shown to impact species populations via dispersal limitations, habitat edge effects, and human degradation of habitats. Her study examined potential degradation effects of habitat fragmentation and light pollution upon species interaction, specifically larvae predation rates, rather than population numbers. She found that predation rates were higher in habitat edges compared to core habitats during the day, but there were no significant difference between the two habitat types at night. This was interesting to Kylee who interpreted this result to suggest that moths (night species) don't seem to mind habitat fragmentation whereas butterflies (day species) do. She didn't find much of a difference in predation rates between plots under - street lights vs. plots in dark areas, suggesting that Tight pollution didn't affect predation rates. Linda asked why light didn't have an effect. Kylee thought that there were probably both positive and negative effects on predators that may cancel each other out. Laura asked about her experience doing research on Louisville Open Space and whether staff and the public were helpful and conducive to field work. Kylee reported that doing research on Louisville Open Space was very smooth and easy. Laura commented that she was glad to hear this and hoped that more ecological studies could be done on City Open Space. Spencer asked whether Kylee had done surveys on insect diversity on Louisville Open Space property and whether those data could be shared with the City. Kylee reported that she had taken general insect surveys of the properties and also detailed moth species surveys. She said she'd be happy to share data with the City. X. Discussion Item: Results of the Davidson Mesa Visitor Use Survey This summer, citizens were asked about their use of Davidson Mesa, with particular emphasis on the Dog Off -leash Area. It was administered as a paper survey, 4