ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on February 1, 2008
ICES Journal of Marine Science: Journal du Conseil 2008 65(5):753-758; doi:10.1093/icesjms/fsm195
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Asian copepods on the move: recent invasions in the Columbia–Snake River system, USA
1 School of Aquatic and Fishery Sciences, University of Washington, PO Box 355020, Seattle, WA 98195-5020, USA
2 School of Earth and Environmental Sciences and School of Biological Sciences, Washington State University Vancouver, Vancouver, WA 98686-9600, USA
3 Center for Lakes and Reservoirs, Portland State University, PO Box 751-ESR, Portland, OR 97207-0751, USA
Correspondence to J. R. Cordell: tel: +1 206 5437532; fax: +1 206 6857471; e-mail: jcordell{at}u.washington.edu.
Cordell, J. R., Bollens, S. M., Draheim, R., and Sytsma, M. 2008. Asian copepods on the move: recent invasions in the Columbia–Snake River system, USA. – ICES Journal of Marine Science, 65: 753–758.Nine Asian copepod species have been introduced into the Northeast Pacific, seven of which are largely confined to the San Francisco estuary. However, several of these copepods recently invaded the Columbia–Snake River system in Washington state, USA. In addition to the calanoid copepod Pseudodiaptomus inopinus, which appeared in the 1980s, the Columbia River now has populations of the calanoids Pseudodiaptomus forbesi and Sinocalanus doerrii, and the cyclopoid copepod Limnoithona tetraspina. Sampling in the Columbia–Snake River system in 2005 and 2006 indicated that (i) newer invaders may have displaced the previously introduced P. inopinus; (ii) P. forbesi had moved upstream into the first five reservoirs in the system; (iii) the other species occurred only in the tidal regions of the lower river; (iv) P. forbesi dominates the late summer holoplankton in the lower river and estuary; and (v) P. forbesi is relatively rare, and the holoplankton is dominated by native species in upstream free-flowing segments of the Columbia River and in reservoirs of the Snake River. Zooplankton samples from ships in Puget Sound suggest that ballast water from California is a major source of the introduced copepods and that the Columbia River itself may be a new source of ballast-introduced copepods.
Keywords: ballast water, copepods, invasive species, plankton surveys
Received 16 June 2007; accepted 4 December 2007; advance access publication 1 February 2008.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  J. D. Williams and J. An The cryptogenic parasitic isopod Orthione griffenis Markham, 2004 from the eastern and western Pacific Integr. Comp. Biol., August 1, 2009; 49(2): 114 - 126. [Abstract] [Full Text] [PDF]
|
|