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Invasive Species: Implications for Habitat Restoration and Effects on Salmonids

Invasive Species: Implications for Habitat Restoration and Effects on Salmonids. Mark Sytsma Center for Lakes and Reservoirs Portland State University www.clr.pdx.edu. C olumbia River Estuary Science-Policy Exchange 10-11 September 2009. Overview. Invasion Process Vectors Impacts

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Invasive Species: Implications for Habitat Restoration and Effects on Salmonids

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  1. Invasive Species: Implications for Habitat Restoration and Effects on Salmonids Mark Sytsma Center for Lakes and Reservoirs Portland State University www.clr.pdx.edu Columbia River Estuary Science-Policy Exchange 10-11 September 2009

  2. Overview • Invasion Process • Vectors • Impacts • Threats to the Pacific Northwest • Management

  3. Invasion Process Source Region Host Region Spread Nativeand non-native species pool Colonists Established Impacts Invasive Species Establishment Transport Modified from Olson and Linen 1997

  4. Vectors • Recreational Boating • Hunting and Angling • Intentional Release • Gardening • Ornamental Ponds • Wildlife Restoration • Ballast Water • Hull Fouling • Live Seafood • Live Bait • Aquaculture • Aquarium and Pet Trade

  5. Vector Strength for Lower Columbia River Aquatic Invertebrates

  6. Source and Volume of Ballast Water Discharge into the Columbia River Source: 2009 Oregon Task Force on Shipping Transport of Aquatic Invasive Species Report to the Legislature

  7. Habitat Alternation in the Columbia River Creates Environmental Match for AIS Habitat alteration along the Columbia River estuary contrasting the shoreline position in 1868-1875 with the present shoreline shown in outline. (Source: Lower Columbia River Bi-State Water Quality program http://www.ecotrust.org)

  8. Columbia River AIS Surveys • Lower Columbia River Survey (2001-2003) • 82 AIS • Middle Columbia River Survey (2006) • 17 AIS

  9. Lower Columbia AIS

  10. Lower Columbia River Invasion Rates • Fish • High rate of introduction in 1800s, lower rate in 1900s • Invertebrates • New species every 5 years from 1880-1975 • New species every 5 months since 1995 green = fishes blue= invertebrates

  11. Lower Columbia Invertebrate Introductions T.U. Darmstadt WSU Photo: Jeff Cordell Photo: Jeff Cordell calacademy

  12. Middle Columbia River Vector Strength ESC – escape from commercial cultivation, AQ – aquarium species, OR – ornamental species, SB – ships ballast, BW – ballast water, HF – hull fouling, GS – gradual spread from introduction outside basin, AX – accidental introduction (hitchhiking with an intentional release), FS – fisheries or wildlife enhancement by or approved by an agency, RI – release/stocking by an individual, not sanctioned by an agency, REC – recreational fishing/boating activity

  13. Middle Columbia River AIS

  14. Consequences of Bioinvasion • Direct effects • Predation Juvenile and adult salmon encounter 20-40 non-indigenous fish during migration High numbers of introduced fish species are found where there are high numbers of listed native species • (Sanderson et al. 2009. Bioscience 59: 245-256).

  15. Consequences of Bioinvasion • Indirect effects • Hybridization • Homogenization of biotic communities and loss of biodiversity and ecosystem resilience • Food web alteration SpartinafoliosaxS. alterniflorahybrid from SFB Psuedodiaptomusinopinus Jeff Cordell

  16. Percent numerical composition of copepods across salinity gradient in 14 west coast estuaries withoutP. inopinus in 7 west coast estuaries with P.inopinus > 10 psu 0 psu Paracalanus sp. E. americana Cyclopidae Corycaeus sp. P. inopinus Acartiura spp. Acartia tonsa E. affinis Oithona similis Other Copepods Source: Bollens, et al. 2002. Hydrobiologia 480: 87-110

  17. Invasive copepods sculpin migration mysids Hypothesized Changes in Estuarine Food Webs Bentho-Pelagic Food Web (post-invasion) Pelagic Food Web (pre-invasion) juvenilesalmon migration Native copepods Source: Steve Bollens, WSU-Vancouver

  18. AIS That Impact Restoration Activities and With System-Changing Potential Zebra/Quagga Mussels Common Reed Haplotypes 1 and M Hydrilla

  19. Zebra and Quagga Mussels • Freshwater fouling organisms • Colonize underwater structures: submerged pumps, boats, nets, marine engines, navigation buoys, fish screens and ladders. • Disrupt natural food chains, and threaten native fish and mussel populations. • Clog intake and cooling pipes of large water users

  20. Current Distribution

  21. Zebra/Quagga Mussel Monitoring

  22. Zebra/Quagga Mussel Monitoring

  23. Early Detection is Key to Control

  24. Larvae Detection Bottleneck • Cross-polarized light microscopy • Slow but sure • PCR • Potentially fast and accurate but needs standardization of procedures and testing on natural matrix samples • FlowCam • Faster than human scope work. Accuracy?

  25. Hydrilla verticillata Bruneau River and Boise populations

  26. Management PREVENT Spread Source Region Host Region DETECT Nativeand non-native species Colonists Invaders Impacts Nuisance Species Establishment Transport PROTECT CONTROL pre-establishment CONTROL post-establishment PREVENT MONITOR for INVASIVENESS

  27. National ANS Task Force • Western Regional Panel of the ANSTF • Columbia River Basin Team • State Management Plans • State Invasive Species Councils • State Agency Activities Management Coordination

  28. Enhanced early detection and rapid response capabilities • Vulnerability assessments at federal hydro and fish passage facilities • Research on management • Permit issues need to be resolved What’s Needed?

  29. The End Mark Sytsma 503-725-8038 sytsmam@pdx.edu

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