HOME >> BIOLOGY >> NEWS
The rising tide of ocean plagues: How humans are changing the dynamics of disease

A leading group of epidemiologists, veterinarians and ecologists report that humans are affecting the oceans in ways that are changing the dynamics of disease. Previously harmless pathogens are becoming killers when combined with contaminants; "good" parasites that invisibly control the balance of species in an ecosystem are disappearing; and changes in sea surface temperature can trigger cholera outbreaks thousands of miles away.

"Human activities are knocking things out of balance," says Andrew Dobson of Princeton University. "For some pathogens, we're seeing nasty synergistic effects with contaminants, such as PCBs. Paradoxically, diseases also play an important role in healthy ecosystem functioning. These changes tend to slip under the radar screen until they show up in ecological cascades that lead to wildlife and human health problems."

Lethal Domoic Acid Poses New Threats to Sea Lions & Humans

Scientists studying sea lions in California are seeing an increase in the number of animals affected by domoic acid, a toxic compound produced by specific types of algal blooms. In high doses, domoic acid is fatal. At lower doses, it can trigger miscarriages and cause gradual, irreversible decay of brain tissue.

Many scientists agree that increases in algal blooms in California and around the world are caused by a combination of factors, including agricultural run-off, oceanographic properties, and global warming. Many of these blooms produce chemicals that are dangerous to humans when concentrated in the food chain. In the case of domoic acid, both shellfish and fish can concentrate the toxin.

Scientists first saw domoic acid poisoning in 1998, when over 70 sea lions died in one weekend. "We thought at the time that it was linked to the fact that it was an El Nino year, but we've seen it every year since then," says Frances Gulland of The Marine Mammal Center in Sausalito, California. "It's a big mystery."


'"/>

Contact: jbrown@seaweb.org
jbrown@seaweb.org
202-497-8375
SeaWeb
17-Feb-2006


Page: 1 2 3 4 5 6

Related biology news :

1. Surprising new species of light-harvesting bacterium discovered in Yellowstone
2. Damon Runyon names new class of rising stars in cancer research
3. Surprising origin of cells internal highways
4. Genome-wide search unearths surprising clues for diabetes and triglycerides
5. Healthy coastal wetlands would adapt to rising oceans
6. Regardless of global warming, rising CO2 levels threaten marine life
7. Despite their heft, many dinosaurs had surprisingly tiny genomes
8. Joslin researchers discover a surprising culprit in the search for causes of diabetic birth defects
9. Surprising airbag hazards among research findings at hearing safety conference
10. Researchers discover surprising drug that blocks malaria
11. Climate change has surprising effect on endangered naked carp

Post Your Comments:
(Date:5/19/2015)... 2015 Fingerprint Cards (FPC) has received ... FPC1155 and FPC1035 from one if its module partners. Deliveries ... Q3 2015 and the sensors will be used by smartphone ... for 2015 hereby amount to 740 MSEK to date. In ... MSEK and a number of smaller orders not separately communicated ...
(Date:5/18/2015)... GOTHENBURG, Sweden , May 18, 2015 ... touch fingerprint sensors FPC1020, FPC1025, FPC1145, FPC1155 and FPC1035 from ... place from June until and including Q3 2015 and the ... Asia . Communicated order values for 2015 hereby amount ... revenues for Q1 2015 of 140 MSEK and a number ...
(Date:5/11/2015)... SAN JOSE, Calif. , May 11, 2015 ... leading developer of human interface solutions, today announced ... Senior Vice President and Chief Financial Officer, reporting ... Mr. Ali replaces Synaptics, current Chief Financial Officer, ... in December 2014. Mr. Ali ...
Breaking Biology News(10 mins):Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 230 Million and Raises Revenue Guidance for 2015 2Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 230 Million and Raises Revenue Guidance for 2015 2Synaptics Appoints Wajid Ali as Senior Vice President and Chief Financial Officer 2
(Date:5/26/2015)... Fluorinov Pharma (Fluorinov), a FACIT portfolio company, today announced ... its Board of Directors.  His appointment strengthens Fluorinov,s leadership ... accelerates its clinical development activities.  "On ... to welcome Luke to the Board of Directors.  Luke ... strength and success of multiple organizations," said Malik ...
(Date:5/26/2015)... SYDNEY and NEW YORK , May ... Limited (ASX:NRT; NASDAQ: NVGN ), announced today that it will ... May 28, 2015 in New York City ... by Dr. Graham Kelly , Novogen Chairman and CEO, is ... via a live webcast. To access the webcast, go to ...
(Date:5/26/2015)... May 26, 2015 Just the characterization ... long-standing unmet biomedical need does not guarantee immediate acceptance. ... that has seen many prior failures is often met ... and use is an irony that is often an ... new start-up company, Asymmetrex has found that ...
(Date:5/25/2015)... FL (PRWEB) May 26, 2015 Where ... speaker Jack Uldrich says, "The honest answer is that ... deliver four keynote speeches throughout the month of June, ... keynote topics vary from future-proofing to top tech trends. ... Uldrich's research is where the universe is expanding to. ...
Breaking Biology Technology:Luke M. Beshar Appointed to Fluorinov Pharma Board of Directors 2Luke M. Beshar Appointed to Fluorinov Pharma Board of Directors 3Novogen to Present at the 2015 Marcum Microcap Conference 2Novogen to Present at the 2015 Marcum Microcap Conference 3Novogen to Present at the 2015 Marcum Microcap Conference 4In August Asymmetrex Will Present Details of Its Crowdsourcing Campaign to Determine the Extent of Application of New Technologies for Counting Adult Tissue Stem Cells 2In August Asymmetrex Will Present Details of Its Crowdsourcing Campaign to Determine the Extent of Application of New Technologies for Counting Adult Tissue Stem Cells 3Futurist Jack Uldrich Says Embracing Our Ignorance is the Key to Unlearning 2Futurist Jack Uldrich Says Embracing Our Ignorance is the Key to Unlearning 3
Cached News: