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The Impacts of Nonnative Japanese Eelgrass (Zostera japonica) on Commercial Shellfish Production in Willapa Bay, WA

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DOI: 10.4236/as.2014.57066    6,053 Downloads   7,089 Views   Citations
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ABSTRACT

Eelgrass species worldwide are valued for the ecosystem service they provide to estuarine and marine habitats. One species, Zostera japonica, however, has some negative impacts outside its native range and is considered invasive. In Willapa Bay WA, USA, the nonnative eelgrass has expanded to the level where the shellfish industry is concerned about its potential impacts on its livelihood. Studies were conducted using paired plots, Z. japonica controlled with the herbicide imazamox vs. untreated controls, to assess the effects of Z. japonica on Manila clams (Ruditapes philippinarum) and Pacific oysters (Crassostrea gigas). Recruitment of new Manila clams was not affected by Z. japonica. The growth of young clams, total commercial clam harvests, clam quality and clam harvest efficiency, however, were greater on plots where Z. japonica was chemically controlled than where it was not treated. The response of oysters to Z. japonica control varied by site; there was no effect at one site, while the other sites had a 15% increase in shucked meat with Z. japonica control. The potential economic impact of a Z. japonica infestation of a shellfish bed was ~$47,000 ha-1 for Manila clams and $4000 ha-1 for oysters for each crop harvest cycle.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Patten, K. (2014) The Impacts of Nonnative Japanese Eelgrass (Zostera japonica) on Commercial Shellfish Production in Willapa Bay, WA. Agricultural Sciences, 5, 625-633. doi: 10.4236/as.2014.57066.

References

[1] Bulthuis, D.A. (2013) Padilla Bay National Estuarine Research Reserve Technical Report No. 36, Science Presentation Abstracts from the Workshop on the Science and Management of Zostera japonica in Washington: A Meeting for State Agencies. Padilla Bay National Estuarine Research Reserve.
www.ecy.wa.gov/programs/sea/aquaculture/pdf/scienceAbstracts.pdf
[2] Shafer, D.J., Kaldy, J.E. and Gaeckle, J.L. (2014) Science and Management of the Introduced Seagrass Zostera japonica in North America. Environmental Management, 53, 147-162.
http://dx.doi.org/10.1007/s00267-013-0172-z
[3] Williams S.L. (2007) Introduced Species in Seagrass Ecosystems: Status and Concerns. Journal of Experimental Marine Biology and Ecology, 350, 89-110.
http://dx.doi.org/10.1016/j.jembe.2007.05.032
[4] Bando K.J. (2006) The Roles of Competition and Disturbance in a Marine Invasion. Biological Invasions, 8, 755-763.
http://dx.doi.org/10.1007/s10530-005-3543-4
[5] Fisher, J.P., Bradley, T. and Patten, K.D. (2011) Invasion of Japanese Eelgrass, Zostera japonica in the Pacific Northwest: A Preliminary Analysis of Recognized Impacts, Ecological Functions, and Risks.
http://pcsga.net/wp-content/uploads/2011/07/Final-Japonica-White-Paper-051811
[6] Tsai, C.C., Ruesink, J.L., Trimble, A.C. and Yang, S. (2010) Interactions between Two Introduced Species: Zostera japonica (Dwarf Eelgrass) Facilitates Itself and Reduces Condition of Ruditapes philippinarum (Manila Clam) on Intertidal Flats. Marine Biology, 157, 1929-1936.
http://dx.doi.org/10.1007/s00227-010-1462-0
[7] WA State Department of Ecology (2014) General Permit and Final Environmental Impact Statement: Management of Zostera japonica on Commercial Clam Beds in Willapa Bay, Washington.
http://www.ecy.wa.gov/programs/wq/pesticides/eelgrass.html
[8] Mach, M.E., Wyllie-Echeverria, S. and Ward, J.R. (2010) Distribution and Potential Effects of a Non-Native Seagrass in Washington State Zostera japonica Workshop, Friday Harbor Laboratories, San Juan Island, 37.
http://www.dnr.wa.gov/Publications/aqr_zostera_study.pdf
[9] Hickey, B.M. and Banas, N.S. (2003) Oceanography of the US Pacific Northwest Coastal Ocean and Estuaries with Application to Coastal Ecology. Estuaries, 26, 1010-1031.
http://dx.doi.org/10.1007/BF02803360
[10] Feldman, K.L., Armstrong, D.A., Dumbauld, B.R., DeWitt, T.H. and Doty, D.C. (2000) Oysters, Crabs, and Burrowing Shrimp: Review of an Environmental Conflict over Aquatic Resources and Pesticide Use in Washington State’s (USA) Coastal Estuaries. Estuaries, 23, 141-176.
http://dx.doi.org/10.2307/1352824
[11] Banas N.S., Hickey B.M., Newton J.A. and Ruesink J.L. (2007) Tidal Exchange, Bivalve Grazing, and Patterns of Primary Production in Willapa Bay, Washington, USA. Marine Ecology Progress Series, 341, 123-139.
http://dx.doi.org/10.3354/meps341123
[12] Ruesink, J.L., van Raay, K., Witt, A., Herrold, S., Freshley, N., Sarich, A. and Trimble, A.C. (2014) Spatio-Temporal Recruitment Variability of Naturalized Manila Clams (Ruditapes philippinarum) in Willapa Bay, Washington, USA. Fisheries Research, 151, 199-204.
http://dx.doi.org/10.1016/j.fishres.2013.11.011
[13] Johannessen, O.H. (1973) Population Structure and Individual Growth of Venerupis pullastra (Montagu) (Lamellibranchia). Sarsia, 52, 97-116.
[14] Lucas, A. and Beninger, P.G. (1985) The Use of Physiological Condition Indices in Marine Bivalve Aquaculture. Aquaculture, 44, 187-200.
[15] Boström, C., Jackson, E.L. and Simenstad, C.A. (2006) Seagrass Landscapes and Their Effects on Associated Fauna: a Review. Estuarine, Coastal and Shelf Science, 68, 383-403.
http://dx.doi.org/10.1016/j.ecss.2006.01.026
[16] Gribben, P., Wright, J., O’Connor, W. and Steinberg, P. (2009) Larval Settlement Preference of a Native Bivalve: The Influence of an Invasive Alga versus Native Substrata. Aquatic Biology, 7, 217-227.
http://dx.doi.org/10.3354/ab00196
[17] Ruesink, J., Freshley, N., Herrold, S, Trimble, A. and Patten, K. (2014) Influence of Substrate Type on Non-Native Clam Recruitment in Willapa Bay, Washington, USA. Journal of Experimental Marine Biology and Ecology, 459, 23-30.
[18] Humphreys, J., Caldow, R.W., McGrorty, S., West, A.D. and Jensen, A.C. (2007) Population Dynamics of Naturalised Manila Clams Ruditapes Philippinarum in British Coastal Waters. Marine Biology, 151, 2255-2270.
http://dx.doi.org/10.1007/s00227-007-0660-x
[19] Tu Do, V., de Montaudouin, X., Lavesque, N., Blanchet, H. and Guyard, H. (2011) Seagrass Colonization: Knock-On Effects on Zoobenthic Community, Populations and Individual Health. Estuarine. Coastal and Shelf Science, 95, 458-469.
http://dx.doi.org/10.1016/j.ecss.2011.10.022
[20] Irlandi, E. and Peterson, C. (1991) Modification of Animal Habitat by large Plants: Mechanisms by which Seagrasses Influence Clam Growth. Oecologia, 87, 307-318.
http://dx.doi.org/10.1007/BF00634584
[21] Allen, B.J. and Williams, S.L. (2003) Native Eelgrass Zostera Marina Controls Growth and Reproduction of an Invasive Mussel through Food Limitation. Marine Ecology Progress Series, 254, 57-67.
http://dx.doi.org/10.3354/meps254057
[22] Peterson, C.H., Summerson, H.C. and Duncan, P.B. (1984) The Influence of Seagrass Cover on Population Structure and Individual Growth Rate of a Suspension-Feeding Bivalve, Mercenaria mercenaria. Journal of Marine Research, 42, 123-138.
http://dx.doi.org/10.1357/002224084788506194
[23] Patten, K., Norelius, S., Haldeman, N., Rasmussen, K., Booth, S., Suhrbier, A., Fisher, J., Meaders, M., Raub, G., Dumbauld, B. and McCoy, L. (2012) Impact of Japanese Eelgrass and its Potential Control Tactic, Imazamox, to Estuarine Resources and Bivalve Aquaculture in Willapa Bay, Washington. Final Report to Washington Department of Fish and Wildlife—Willapa Oyster Reserve.
http://longbeach.wsu.edu/shellfish/documents/finaljapaneseeelgrassreporttowdfwjuly2012
[24] Fréchette, M., Butman, C.A. and Geyer, W.R. (1989) The Importance of Boundary-Layer Flow in Supplying Phytoplankton to the Benthic Suspension Feeder, Mytilus edulis L. Limnology and Oceanography, 34, 19-36.
http://dx.doi.org/10.4319/lo.1989.34.1.0019
[25] Reusch, T.B.H. and Williams, S.L. (1999) Macrophyte Canopy Structure and the Success of an Invasive Marine Bivalve. Oikos, 84, 398-416.
http://dx.doi.org/10.2307/3546420
[26] ENVIRON International Corporation (2012) Screening-Level Ecological Risk Assessment of the Proposed Use of the Herbicide Imazamox to Control Invasive Japanese Eelgrass (Zostera japonica) in Willapa Bay, Washington State.
http://www.ecy.wa.gov/programs/wq/pesticides/envi
roReview/riskAssess/riskassessmentimazamox110712.pdf
[27] EPA (US Environmental Protection Agency) (2009) Pesticide Product Label System (PPLS).
http://oaspub.epa.gov/pestlabl/ppls.home
[28] Patten, K. (2014) Accepted. Imazamox Control of Invasive Japanese Eelgrass: Efficacy and Nontarget Impacts. Journal of Aquatic Plant Management.

  
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