@article {83182, title = {A doubled down invasion of the northeast Pacific by the Asian mud shrimp, Upogebia major, and its coevolved bopyrid isopod parasite, Orthione griffenis}, journal = {Aquatic Invasions}, volume = {16}, number = {4}, year = {2021}, note = {The blue mud shrimp, Upogebia pugettensis, is known to be an ecosystem engineer, turning over and re-suspending, and aerating sediments (bioturbation), burrowing, and deposit feeding. The mud shrimp affects organic structure, nutrients, and the grain size of sediments in mudflats. Some of this activity creates difficulties for oyster growers, causing the application of pesticides in oyster growing areas in the 1950s. It may be that the changes in the ecosystem caused by introduced oysters and pesticides opened the doors for subsequent invasions. In 1999, a parasitic isopod was discovered to be infecting the native mud shrimp, and effectively sterilizing the shrimp. A related species, the Asian mud shrimp. Upogebia major, is less susceptible to the parasite, and has begun to fill in spaces formerly occupied by the blue mud shrimp. While this article is concerned with mud shrimp populations in California, the dynamics discussed are relevant to Oregon estuaries. If the ways our estuaries are engineered changes thanks to the double invasion, the way we manage our estuaries will also have to change. This is an open-access article, and it has also been re-printed as no.21-021 in the ORESU-R series.}, month = {2021}, pages = {p.721{\textendash}749}, keywords = {Alsea Bay, Asian mud shrimp Upogebia major, bioturbation, community ecology, Coos Bay, depleted populations, Griffen{\textquoteright}s isopod = Orthione griffensis, introduced species, Mud shrimp = Upogebia pugettensis, natural resource management, Nestucca Bay, Netarts Bay, Upogebia macginitieorum, Yaquina Bay}, doi = {https://doi.org/10.3391/ai.2021.16.4.09}, url = {https://ir.library.oregonstate.edu/concern/articles/k643b826b }, author = {Chapman, John W. and Li, Jingchun and McGowan, Michael F. and Breitenstein, Ralph A. and Appy, Ralph and Hieb, Kathryn A. and Piotrowski, Christina N. and Elder, Leanne E.} } @article {34531, title = {An introduced Asian parasite threatens northeastern Pacific estuarine ecosystems}, journal = {Biological Invasions}, volume = {14}, year = {2012}, note = {The non-indigenous isopod Orthione griffenis effectively castrates the mud shrimp Upogebia. The spread of the invasive parasite has dramatically depleted mud shrimp populations along the northwestern coast of North America. "All previously known abundant Upogebia populations were either absent or at greatly reduced abundances in all California, Oregon and Washington estuaries examined." (p.1225) "[U]rgent, immediate responses, including captive breeding programs for the most impacted Upogebia populations and species are warranted." (p.1234)}, pages = {p.1221-1236}, keywords = {Alsea Bay, bioturbation, Coos Bay, depleted populations, invasive species, Mud shrimp = Upogebia pugettensis, Netarts Bay, Orthione griffenis, parasites, Sand Lake, Siletz Bay, Tillamook Bay, Yaquina Bay}, doi = {10.1007/s10530-011-0151-3}, url = {https://ir.library.oregonstate.edu/concern/articles/nc580n174}, author = {Chapman, John W. and Dumbauld, Brett R. and Itani, Gyo and Markham, John C.} } @article {13611, title = {An examination of the spatial and temporal generality of the influence of ecosystem engineers on the composition of associated assemblages}, volume = {41}, number = {no.1}, year = {2007}, note = {Examined the manner and mechanisms by which ghost shrimp and eelgrass influenced associated benthic assemblages. Compared temperate estuaries in New Zealand and the U.S. Studied Otago Harbour, Blueskin Bay and Papanui Inlet in New Zealand and Tillamook Bay, Yaquina Bay and Netarts Bay in Oregon. Transplanted shrimp into low- and high-density plots of eelgrass and eelgrass into low- and high-density plots of ghost shrimp. Noted which associated benthic species were sensitive to the differences in density. Also noted seasonal factors: seagrass has a competitive advantage in spring, while ghost shrimp are most active and have a greater advantage in summer.}, pages = {p.129-147}, keywords = {bioturbation, ecosystem modeling, Ghost shrimp = Neotrypaea californiensis (Callianassa californiensis), Japanese eelgrass = Zostera japonica, Netarts Bay, Tillamook Bay, Yaquina Bay}, doi = {10.1007/s10452-006-9053-3}, author = {Berkenbusch, Katrin and Rowden, Ashley A.} }