HOME >> BIOLOGY >> NEWS
Changes in west coast marine ecosystems significant

SAN FRANCISCO The California Current system has experienced significant changes during the past decade, resulting in dramatic variations in the ecosystem characterized by shifts in phytoplankton production, expanding hypoxic zones, and the collapse of marine food webs off the western coast of the United States. These changes, driven by new wind patterns, are consistent with predictive models of global climate change, scientists said this week at the annual meeting of the American Association for the Advancement of Science.

But the researchers stopped short of saying that climate change was the definitive cause.

"This coming year will be important," said Jack Barth, a professor of oceanic and atmospheric sciences at Oregon State University. "If the persistent wind patterns of the last few years continue through 2007, it might be enough to tip the scales in favor of climate change as a cause for these extreme variations in our West Coast marine environment.

"Our research has shown there is a 'wobble' in the Jet Stream that in some years has tended to overpower the more historic day-to-day variations in climate in favor of these two- to three-week wind patterns that influence upwelling and ultimately, ocean production."

Eight scientists, including five with ties to Oregon State University, are part of a AAAS symposium, "Predicting the Unpredictable: Marine Die-Offs along the West Coast." This week, they outlined how marine ecosystems are responding to widely different climate-driven variables, beginning in 1997-98 with one of the most powerful El Nino episodes on record.

During that El Nio, ocean waters off the West Coast grew warmer, nutrients decreased, biological production was reduced, and species from zooplankton to salmon disappeared, were drastically reduced or moved from their typical habitats. The El Nio capped what had been a series of years through the 1990s characterized by warm waters and weak upwelling.

That regime
'"/>

Contact: Jack Barth
barth@coas.oregonstate.edu
541-737-1607
Oregon State University
16-Feb-2007


Page: 1 2 3 4

Related biology news :

1. Changes in chromosomal constitution of preimplantation embryos suggest caution in genetic screening
2. Changes in amino acids in the 1918 influenza virus cut transmission
3. Changes in dietary protein may override inherited skeletal abnormalities
4. Symposium Changes on Earth honors Yale Geologist Robert Berner
5. Changes to in utero environment may alter onset of cancer, U of T study
6. Changes in reef latitude
7. Changes to embryos can elicit change in adult fish
8. Changes in technique can reduce radiation dose in CT examination
9. Changes in community size affect the outcome of competition
10. Seawater intrusion is the first cause of contamination of coastal aquifers
11. Healthy coastal wetlands would adapt to rising oceans

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/30/2017)... NEW YORK , March 30, 2017 ... by type (physiological and behavioral), by technology (fingerprint, AFIS, ... recognition, voice recognition, and others), by end use industry ... travel and immigration, financial and banking, and others), and ... Europe , Asia Pacific ...
(Date:3/28/2017)... -- The report "Video Surveillance Market by ... Devices), Software (Video Analytics, VMS), and Service (VSaaS, Installation ... 2022", published by MarketsandMarkets, the market was valued at ... reach USD 75.64 Billion by 2022, at a CAGR ... considered for the study is 2016 and the forecast ...
(Date:3/24/2017)... MILAN , March 24, 2017 The Controller ... Deputy Controller Mr. Abdulla Algeen have received the prestigious international ... Continue Reading ... ... small picture) and Deputy Controller Abdulla Algeen (small picture on the right) ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... , ... AMRI, a global contract research, development and manufacturing ... and quality of life, will now be offering its impurity solutions as a ... requirements for all new drug products, including the finalization of ICH M7 earlier ...
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is back for its ... 2018 in San Francisco, CA. The Summit brings together current and former FDA office ... directors and government officials from around the world to address key issues in device ...
(Date:10/11/2017)... ... October 11, 2017 , ... A new study ... in frozen and fresh in vitro fertilization (IVF) transfer cycles. The ... IVF success. , After comparing the results from the fresh and frozen transfer ...
(Date:10/10/2017)... ... 2017 , ... Dr. Bob Harman, founder and CEO of VetStem Biopharma, ... The event entitled “Stem Cells and Their Regenerative Powers,” was held on ... DVM, MPVM was joined by two human doctors: Peter B. Hanson, M.D., Chief of ...
Breaking Biology Technology:
Cached News: