Earth Changes
Scientists from the University of Leeds together with international partners have documented the disastrous decline of the seal - a species found only in the land-locked waters of the Caspian Sea - in a series of surveys which reveal a 90 per cent drop in numbers in the last 100 years.
The research findings have prompted the International Union for Conservation of Nature (IUCN) to move the Caspian seal from the Vulnerable category to Endangered on its official IUCN Red List of Threatened Species, announced today in Barcelona [06 October 2008].
Dr Simon Goodman of Leeds' Faculty of Biological Sciences says: "Each female has just one pup a year, so with numbers at such a low levels, every fertile female that dies is a nail in the coffin of the species. We're hoping that the seal's change in Red List status will help raise awareness about their plight, and the many important conservation issues facing the whole Caspian ecosystem."
Commercial hunting, habitat degradation, disease, pollution and drowning in fishing nets have caused the population of the seal collapse from more than 1 million at the start of the 20th century to around 100,000 today.
School of Natural Resources & Agricultural Sciences professor Chien-Lu Ping published his latest findings in Nature Geoscience. Wielding jackhammers, Ping and a team of scientists dug down more than one meter into the permafrost to take soil samples from more than 100 sites throughout Alaska. Previous research had sampled to about 40 centimeters deep.
After analyzing the samples, the research team discovered a previously undocumented layer of organic matter on top of and in the upper part of permafrost, ranging from 60 to 120 centimeters deep. This deep layer of organic matter first accumulates on the tundra surface and is buried during the churning freeze and thaw cycles that characterize the turbulent arctic landscape.
'We got some absolutely amazing footage from 7700 metres. More fish than we or anyone in the world would ever have thought possible at these depths,' says project leader Dr Alan Jamieson of the University of Aberdeen's Oceanlab, on board the Japanese research ship the Hakuho-Maru.
'It's incredible. These videos vastly exceed all our expectations from this research. We thought the deepest fishes would be motionless, solitary, fragile individuals eking out an existence in a food-sparse environment,' says Professor Monty Priede, director of Oceanlab.
A preliminary report from the U.S. Geological Survey said a magnitude-4.2 temblor centered about 18 miles west of North Fork shook Elko County at 3:07 a.m. Tuesday.
USGS geophysicist Jessica Sigala says a seismologist reviewed the record and determined that phases from a magnitude-5.8 quake in the Arctic Ocean seven minutes earlier had been wrongly interpreted by a seismograph as a local quake.
"There's no order to evacuate but people are asked to stay outside a radius of four kilometres (2.5 miles) from the volcano's summit because it could spew lava and heat clouds down its slopes," volcanologist Sandi said.
Small eruptive chains that normally produce 400 movements were even more active this weekend, said Jair Cardoso, member of the local Attention, Prevention and Disasters Committee, according to El País. He did not say how many were registered.
The volcano has ejected only mud and ashes so far, but a large eruption at any moment, or at least more solid materials, that would leave disastrous results.
Authorities maintain a yellow alert in the zone, but will raise it to orange if the situation continues.

Western lowland gorillas and Ebola: There is significant evidence that outbreaks of Ebola in western lowland gorillas and other primates--including humans--are related to unusual variations in rainfall/dry season patterns, potentially caused by climate change.
The best defense, according to the report's authors, is a good offense in the form of wildlife monitoring to detect how these diseases are moving so health professionals can learn and prepare to mitigate their impact.
The 6.6 magnitude Tibet earthquake, with an epicentre 80 km (50 miles) west of Lhasa, killed at least nine people, state media reported, revising down an earlier estimated death toll of at least 30.
LAT: 79.83
LON: -115.23
MAG: 5.8
DEPTH km: 10.0
REGION: Arctic Ocean
A Global picture of recent seismic activity can be seen here.