IR Home
MEPS
Home
Editors
Forthcoming
Information
Subscribe
Journals
Home
MEPS
AME
CR
DAO
ESEP
ESR
Search
Subscribe
Book Series
EE Books
Top Books
ESEP Books
Order
EEIU Brochures
(pdf format)
Discussion Forums
Home
Research
IR Research
Institutions
International Ecology Institute
Eco-Ethics International Union
Foundation
Otto Kinne Foundation
![](../../../images/pixel.gif) | ![](../../../images/pixel.gif) |
MEPS 295:43-48 (2005)
|
Abstract
|
![](../../../images/hline.gif)
Biological indicators of the timing and direction of warm-water advection during the 1997/1998 El Niño off the central Oregon coast, USA
Julie E. Keister1,*, Travis B. Johnson2, Cheryl A. Morgan3, William T. Peterson4
1Oregon State University, College of Oceanic and Atmospheric Sciences, 104 COAS Administration Building, Corvallis, Oregon 97331-5503, USA 2Ocean Research Institute, The University of Tokyo, Center for International Cooperation,
1511 Minamidai, Nakano-ku, Tokyo 1648639, Japan 3Oregon State University, Cooperative Institute for Marine Resources Studies, 2030 S. Marine Science Drive, Newport, Oregon 97365, USA 4NOAA Fisheries, Hatfield
Marine Science Center, 2030 S. Marine Science Drive, Newport, Oregon 97365, USA
*Email: jkeister@coas.oregonstate.edu
![](../../../images/hline.gif)
ABSTRACT: Unusual collections of several euphausiid, chaetognath, and copepod species help elucidate the effects of the strong 1997/1998 El Niño off the central Oregon, USA, coast. Furcilia of Nyctiphanes simplex, a euphausiid typically
found only as far north as central California, were collected in bi-weekly nearshore samples between December 1997 and November 1998. N. simplex was reported in summer 1998 as far north as the northern tip of Vancouver Island, British Columbia,
Canada (51°N); our bi-weekly collections off Oregon allow us to use that species to help resolve the timing of arrival and disappearance of the biological signal of the El Niño, which was delayed by several months beyond the physical signal.
Additionally, 2 species of euphausiid (Euphausia recurva and E. mutica), 2 species of chaetognath (Sagitta pseudoserratodentata and S. hexaptera), and 1 copepod (Centropages bradyi) that have never before been reported
in coastal Oregon waters were collected in samples taken between 28 and 103 km off Oregon during the 1997/1998 El Niño. The 1997/1998 El Niño was one of the strongest on record and the occurrence of the unusual species may indicate the
extent of the northward and onshore advection of warm water into the study area.
KEY WORDS: Nyctiphanes simplex · El Niño · Euphausids · Sagitta spp. · Range extension · Advection · Oregon · Zooplankton
Full text in pdf format
![](../../../images/hline.gif)
Published in MEPS Vol.
295
(2005) on June 23
Print ISSN: 0171-8630; Online ISSN: 1616-1599.
Copyright © Inter-Research, Oldendorf/Luhe, 2005
|