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31:25 2017 Delta Invasive Species Symposium: Lightning… 2017 Delta Invasive Species Symposium: Lightning Talks	2017 Delta Invasive Species Symposium: Lightning Talks 2017 Delta Invasive Species Symposium held on August 29, 2017 at UC Davis. wetlands ecology nature web sites united states fish and wildlife service conservation-restoration water resources river delta animal invertebrates beaver courses (education) river california (state) renovation From ATS Video 0 likes 33 plays 0