Skip to main content

Mercury can lead to extinction of Arctic bird

Threats from various sources have contributed to a 70 per cent decline in the bird’s population in Canada

An ivory gull (Photo: Abigor/flickr)An ivory gull (Photo: Abigor/flickr)Mercury pollution has risen nearly 50-fold in the feathers of a breed of Arctic bird over the past 130 years, says a BBC report that quotes a few scientists.
The researchers, according to the report, analysed feather samples of the ivory gull (Pagophila eburnea) from the Canadian Arctic and western Greenland from 1877 to 2007. They found the bird had been exposed to mercury for decades. Scavenging on the carcasses of whales, seals and other mammals killed by predators such as polar bears was the primary source of mercury consumption.
Days before this, in January, the very rare Arctic bird was spotted in US' Quincy, bringing many bird watchers to the city.
Meanwhile, in a study published in PLOS One, it has been highlighted that since ivory gulls avoid flying over open water, scientists suggest birds may vary their migration route with the variations in sea ice formations. Breeding populations of the bird are presently found in Svalbard (Norway), Greenland (Denmark) and Russia [18], as well as the Canadian high Arctic.
"The ivory gull is an endangered seabird that spends its entire year in the Arctic environment. In the past three decades, threats from various sources have contributed to a 70 per cent decline in Canada," says the study.

Popular posts from this blog

El Nino may make a comeback in 2017, but unlikely to affect southwest monsoon (downtoearth,)

In 2016, the world witnessed the strongest El Nino on record, which resulted in above average temperatures. The year experiences record-breaking heat for nine consecutive months. It had also ruined the Indian monsoon for two years. After two successive droughts in 2014 and 2015, last year witnessed erratic rainfall both in terms of geographical spread and time. Thanks to El Nino, the southwest monsoon in 2014 and 2015 witnessed a deficit of 11 and 14 per cent respectively.

While the 2016 monsoon season in India saw 97 per cent rainfall, it was far less than the 106 per cent that the India Meteorological Department (IMD) had forecast in July. The lesser-than-expected rainfall, especially in the second half of the monsoon season, has been attributed to the absence of a strong La Nina phenomenon in the equatorial Pacific Ocean that is known to help the Indian monsoon.

According to a recent forecast by the National Oceanic and Atmospheric Administration (NOAA), there’s a 50 per cent chan…

Current Affairs MCQ for UPSC Exams – 21 December 2016

Q.1- Which of the following is/are correct regarding Nirbhaya missile?

1. It is a cruise missile
2. It is hypersonic in speed
A. 1 only
B. 2 only
C. Both
D. None

Q.2- Khanjar-III is military exercise between which of the following countries?

A. India and Russia
B. Russia and China
C. India and Kyrgyzstan
D. Russia and Afghanistan

Q.3- UPI has been in news recently, what is the full form of UPI?

A. Unified Payment Interchange
B. Unified Payment Interface
C. Unified process interchange
D. Unified process interface
 .
.
.
.

.
.
.
.
.
.
.
.
.
.
.
.
.
.

.
.
.
.
.
.
.
.
.
.
Answer  1-A, 2 -C, 3-B

Indian Polity Elections (MCQ )

1. Who of the following has the responsibility of the registration of voters
a) Individual voters
b) Government
c) Election commission
d) Corporations


2. Democracy exists in India, without peoples participation and co operation democracy will fail. This implies that
a) Government should compel people to participate and cooperate with it
b) People from the government
c) People should participate and cooperate with the government
d) India should opt for the presidential system


3. Which of the following are not the functions of the election commission
1) Conduct of election for the post of the speaker and the deputy speaker, Lok sabha and the deputy chairman, Rajya sabha
2) Conduct of elections to the state legislative assemblies
3) Deciding on all doubts and disputes arising out of elections

a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 2

4. Which of the following electoral systems have not been adopted for various elections in India
1) System of direct elections on the basis of adult suffrage
2…