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2019 Rare Plant Task Force: Abstracts Edwin L 2019 Rare Plant Task Force: Abstracts Edwin L. Bridges, Botanical and Ecological Consultant, Gig Harbor, Washington. “Multiplying Our Networks – Harnessing Social Media to Develop Citizen Scientists”. [email protected] (KEYNOTE PRESENTATION) Social media networks have overtaken many areas of public discourse, often trivializing or misrepresenting serious topics. However, with careful moderation and direction, these networks can expand our knowledge of nature, and engage a larger network of naturalists. Those who have enthusiasm for nature need very little additional direction and encouragement to become valuable “citizen scientists”. I wondered if social media could help determine the current status of rare orchids which were once widespread, but now rarely seen. In 2015 I started the Facebook group “Florida Flora and Ecosystematics”, specifically for discussion of native plants and ecosystems of Florida. It now has over 3,300 members, and in 2018 had over 5,000 posts, 30,000 comments, and 160,000 reactions, most on topic and including many valuable contributions about Florida plants and ecology. Although public discussion can be random and repetitive, it is an educational resource, a forum for observations (sometimes rare plants), and a networking tool. However, Facebook’s data structure has limited search and sort functionality. In contrast, iNaturalist was constructed to facilitate data collection by citizen scientists and has explicit spatial and taxonomic organization. Searches can use combinations of many data fields, and records can be mapped and compiled. iNaturalist functions best when knowledgeable people review posted photos, since pattern recognition identification is unreliable. With curation and annotation, there is high potential for iNaturalist to increase our knowledge of the current distribution of Florida plants, both common and rare. Patti J. Anderson, Division of Plant Industry, “Enhancing Plant Conservation Awareness through Music.” [email protected] (ORAL PRESENTATION) In this review, I analyze examples of musical performance as a means of engaging plant enthusiasts and less than enthusiasts based on data collected from 2014-2019. The perennial question of how to enhance audience interest and avoid audience PowerPoint malaise is shown to have at least one answer in musical performance. At several sites, unsuspecting populations of human adults and children have been exposed to plant songs. Audiences included master gardeners, master naturalists, museum docents, regulatory officials, and pizza restaurant patrons. I recommend introductions and augmentations of musical performance to enhance interest in plants and plant conservation by citizens who might otherwise suffer over-exposure to charts and graphs. Haydee Borrero, Florida International University, Julio C. Alvarez, National Herbarium “Onaney Muñiz” and Botanica, Ramona O. Prieto, National Herbarium “Onaney Muñiz” and Botanica and Hong Liu, FIU and Fairchild Tropical Botanic Garden. “Habitat and phorophyte comparisons of the mule-ear orchid, Trichcocentrum undulatum between the core and edge distribution: a Cuba and southern Florida story.” [email protected] (ORAL PRESENTATION) The Florida state-listed endangered mule-ear orchid, Trichocentrum undulatum, is an epiphytic orchid that is endemic to the Caribbean region. Southern Florida is the northern limit of the species distribution, with only one surviving population, in the Everglades National Park. We know of only one phorophyte host, i.e. the buttonwood, for this orchid in South Florida. The habitat is threatened by sea level rise due to its coastal proximity. We studied the species’ ecology in neighboring Cuba and compared it to that in South Florida. We found a high density of T. undulatum in Cuba throughout the country in various habitats. We were able to document over 84 phorophyte species in the wild and a high proportion of terrestrially bound individuals. With the continuing threats of habitat loss due to sea-level rise and detrimental plant-animal interactions, the future of the mule-ear orchid population found in the coastal regions of Florida is grim. It may be wise to implement reintroductions and artificially diversify the orchid’s phorophyte hosts in South Florida. The knowledge gained by comparisons between core and edge distributions for the species may aid in future restoration and conservation activities by providing baseline information. Sally M. Chambers, Shawn McCourt, Bruce K. Holst, and Elizabeth Gandy, Marie Selby Botanical Gardens, [email protected], “Assessment and conservation of the federally listed costal cactus, Harrisia aboriginum.” (ORAL PRESENTATION) The genus Harrisia (Cactaceae) comprises 20 species of narrowly endemic shrubs and trees within the Cereeae tribe of night-flowering, edible-fruited cacti. Colloquially known as aboriginal prickly-apple, Harrisia aboriginum is a sprawling, multi–stemmed, columnar cactus found on shell mounds, coastal berms, in coastal grasslands and maritime hammocks in just three counties on the southwest coast of Florida. The species is in steep decline, primarily due to development and erosion of the coastal habitats in which it is found, and many populations have not been evaluated since the early 2000’s. The goal of this project is to inventory extant populations and determine overall abundance and plant health, and to assess the genetic variation across the species’ geographic range. At each location, a small portion of fruit will be collected to grow seedlings out in situ for reintroduction purposes, and spines will be collected for genetic analyses. We also aim to visit locations where plants were previously reported to assess these areas in their potential for reintroduction purposes. Data presented here represent preliminary findings of our work, with a long-term goal of boosting overall plant numbers and genetic diversity in hopes of delisting this species in the future. Katherine T. Charton, Archbold Biological Station, Stacy A. Smith, University of Florida, and Eric S. Menges, Archbold Biological Station, “Fighting fire: Trends in Cladonia perforata survival, cover, and microhabitat preferences in a pyrogenic landscape.” ktcharton@archbold- station.org (ORAL PRESENTATION) The federally endangered lichen Cladonia perforata occurs on xeric ridges throughout Florida, but most of the known populations occur in Florida rosemary scrub habitat along the Lake Wales Ridge. We followed 13 known C. perforata subpopulations at Archbold Biological Station and Royce Ranch Wildlife and Environmental Area from 2011 to 2018 using a multi-spatial scale monitoring protocol, with goals of detecting changes in cover through time and in relation to fire regimes. To date, we have completed 3-year resurveys at 548 presence/absence plots and 166 cover quadrats. We also remapped subpopulation boundaries to monitor changes in subpopulation extent. Plot occupancy minimally decreased across subpopulations after 3 years (40.5% to 39.8%) with the exception of one subpopulation affected by prescribed fire between survey dates (55.3% to 25.0%). Mean C. perforata cover also only slightly decreased (2.67% to 2.55%) in all but the burned subpopulation, which significantly declined between surveys (4.02% to 0.63%). We found no significant interactions between occupancy or cover and microhabitat variables. Aerial extents of subpopulation boundaries varied but generally increased, with the exception of the longest unburned subpopulation and the subpopulation burned between survey dates. Our results support the commonly held assumption that C. perforata is killed by fire, so despite stable population trends in unburned subpopulations, we recognize that C. perforata remains extremely endangered due to its limited range, slow growth rate, and negative response to fire. We recommend facilitating patchy fires and reintroductions where necessary to help this species recover. Karen Cole, Gillespie Museum, Stetson University, and Cindy Bennington, Department of Biology, Stetson University. “Protecting the endemic and rare: Parallel development of natural history programming and site restoration.” [email protected] (ORAL PRESENTATION) We report on an ongoing restoration project in a small, urban fragment and the co-evolution of educational programming in tandem with the site’s maturation. Beginning with the planting of approximately 80 trees, the Volusia Sandhill Ecosystem was established in 2011 on a 0.35 ha degraded field on a sandy slope adjacent to Stetson University’s environmental learning center. The site extended the native landscape of the adjacent Gillespie Museum of Minerals, and created new opportunities for incorporating the natural history of pre-urban Florida into the existing outreach programs. With mainly trees and a few native understory species on the site, our earliest educational efforts were focused on soil, trees, and the plant and animal diversity expected to be present in a mature sandhill. Later, as the native understory developed, we incorporated activities related to flower structure and implications for pollination. More recently, as the plant understory and pollinator diversity and abundance increased, we have used the topic of pollination as a catalyst for education about plant reproduction and the importance of pollinators for the conservation of native plants, especially those that are endemic and/or rare. Throughout the restoration process, our outreach ranged from multi-day workshops for public school
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