manding opportunities, realizing there will be successes and disappointments along the way. Take a deep breath and don’t be afraid to “ride the tiger.” n Presented during S7: Floating Treatment Wetlands, 6/8/2021 8:35AM - 10:25AM ET
THE DUWAMISH RIVER FLOATING WETLANDS PROJECT: COMMUNITY SCIENCE AND PUBLIC OUTREACH Andrews, Leann, Penn State Hampton, Adrienne Mocorro Powell, Ashley Engelke, Jen Bowles, Mason Rottle, Nancy The Duwamish River Floating Wetlands project deployed and monitored constructed floating wetlands (CFWs) during the 2019 and 2020 seasons of outmigrating juvenile salmon runs on the urban Duwamish River in Seattle, Washington. Embedded in the project was a highly integrated community science and public outreach program developed using best practices as described in Culturally Sustaining Pedagogies, Principles of Environmental Justice, and Jemez Principles for Democratic Organizing. The goals of the community science and outreach program were 1) to include and employ populations historically underrepresented in science, infusing equity and access at the forefront of the research, 2) to add local perspective and diverse viewpoints to the design and research approach, 3) to inform and educate the residents, workers and sustenance fishers in the Duwamish Valley neighborhoods on CFWs’ potential in the Duwamish River, 4) to inform and educate the general public on CFWs, building public support in the region which may have implications towards supportive policy changes in the future. Over two years, the design and research of the CFWs involved 44 community members, 50 students, 3 Doris Duke Conservation Scholars, and outreached to dozens of organizations inperson, and hundreds of individuals via a website and social media presence. Participants ranged from 12 to 75 years of age, with a high percentage of minority groups and Duwamish Valley residents. All participants in the project were compensated for their contribution, including community scientists, in cash and/or academic credits and youth community scientists were invited to participate in a complementary career exploration program. This session will outline the methods, approach, outcomes and lessons learned of the community science program. In particular, we will discuss how local community members were critical to completing the project in 2020 during the COVID-19 lockdowns, and how their perspective shaped the design, management, research and stewardship of the floating wetland systems. n 184 Wetland Science & Practice July 2021
Global Climate Change Presented during CS12: Restoration, Tuesday, June 8, 2021 1:15PM 3:05PM ET
HUMANS PREDATORS DRIVE RESTORATION OF SALT MARSH DIEBACK ON NANTUCKET, MA Karberg, Jennifer, Nantucket Conservation Foundation Extensive salt marsh dieback is driven by intense herbivory by the native purple marsh crab (Sesarma reticulata) and results in a complete loss of stabilizing low marsh vegetation, particularly smooth cordgrass (Spartina alterniflora). Salt marsh dieback dramatically reduces marsh resilience; leading to increases in soil erosion, sediment softening/subsidence and increased impacts of climate change and sea level rise. After over a decade of salt marsh dieback throughout mainland New England, marshes appear to be recovering although they have experienced significant erosion and subsidence. Purple marsh crab populations explode due to a lack of predators. On Nantucket Island, MA salt marsh dieback began about a decade later than other areas, meaning that loss of salt marsh elevation and area is not as extreme compared to mainland salt marshes. This gives us a unique opportunity to control the purple marsh crab and facilitate salt marsh revegetation before losing valuable soil sediments. In 2019, the Nantucket Conservation Foundation initiated a research project using humans as predators of the purple marsh crab with active trapping and removal during the field season. During both the 2019 and 2020 field seasons, significant numbers of purple marsh crabs were trapped and removed from two marshes in Polpis Harbor, Nantucket MA. Over this two-year project, NCF has observed significant recolonization of bare soil by smooth cordgrass and documented a reduction in crab grazing effort. In 2020, NCF out-planted plots of smooth cordgrass within the dieback areas and monitored a successful establishment of 50% survival. The success of this management effort as well as the documented low field work effort make the innovative use of humans as crab predators a successful response to salt marsh dieback. n Presented during CS3: Wetland Chemistry, 6/3/2021 4:35PM 6:25PM ET
DIURNAL VARIATION IN WETLAND METHANE FLUXES: GLOBAL PATTERNS Bansal, Sheel, USGS Valach, Alex McNicol, Gavin
