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:
*Name:
*Comment:
*Email:


(Date:3/23/2017)... India , March 23, 2017 The report "Gesture ... Touchless Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, ... at a CAGR of 29.63% between 2017 and 2022. ... ... ...
(Date:3/20/2017)... 2017 At this year,s CeBIT Chancellor Dr. ... DERMALOG. The Chancellor came to the DERMALOG stand together with the Japanese ... CeBIT partner country. At the largest German biometrics company the two government ... and iris recognition as well as DERMALOGĀ“s multi-biometrics system.   ... ...
(Date:3/9/2017)... and MOUNTAIN VIEW, Calif. , ... Well Made Simple," and 23andMe , the leading ... better food choices.  Zipongo can now provide customers with ... preferences, health goals and biometrics, but also genetic markers ... choices. Zipongo,s personalized food decision support platform ...
Breaking Biology News(10 mins):
(Date:4/20/2017)... ... April 20, 2017 , ... Open Therapeutics and ... (IP) sharing and commercialization model. , The Center for Advancing Innovation helps institutions ... this effort is bringing the IP to the attention of the entrepreneurial community ...
(Date:4/19/2017)... ... 18, 2017 , ... The Vibrating Orifice Aerosol Generator (VOAG) ... monodisperse droplets of known diameters for research applications such as for calibrating droplet ... drying monodisperse droplets. , The VOAG requires forcing liquid out of an ...
(Date:4/19/2017)... ... April 19, 2017 , ... Nobilis Therapeutics Announces Completion of ... Leverage Clinical Data in its Upcoming Post Traumatic Stress Disorder Trial , Nobilis ... clinical trial assessing efficacy of its NBTX-001, a xenon-based therapeutic in the treatment of ...
(Date:4/19/2017)... , April 19, 2017 A new report published ... Industry Forecast, 2014-2022 ," the global market was valued at $6,769 million in ... of 9.6% from 2016 to 2022. ... Allied Market Research ...      (Logo: http://photos.prnewswire.com/prnh/20140911/647229) ...
Breaking Biology Technology:
Cached News: