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Showing posts with label Ecology. Show all posts
Showing posts with label Ecology. Show all posts

Jun 11, 2018

[CA] Chitrangudi Bird Sanctuary and Karaivetti Bird Sanctuary


In a bid to conserve wildlife habitats in the State, the Union Ministry of Environment, Forest and Climate Change has proposed to declare areas around the Chitrangudi Bird Sanctuary in Ramanathapuram District and Karaivetti Bird Sanctuary in Ariyalur District as Eco – Sensitive Zones (ESZ)
New Eco – Sensitive Zones (ESZ) in Tamil Nadu
Chitrangudi Bird Sanctuary
Karaivetti Bird Sanctuary
In Ramanathapuram District
In Ariyalur District
4.7 sq. km
5.5 sq. km
About 11000 birds belonging to 43 species are known to visit the sanctuary during the peak season.
The sanctuary is also home to pelicans, painted storks, Eurasian spoon bills, white ibis, among others.
The birds flock to the sanctuary from October to February
The Bar Headed Geese, the highest-flying bird in the world having its breeding ground in Ladakh and Tibet, arrive in Karaivetti by Feb – end and remain until May before flying back
About 50000 – 60000 birds frequent the fresh water feeding ground in Ariyalur District annually

Jan 25, 2016

[CA - Notes] Dinosaur fossils found in Kutch region of Gujarat

Dinosaur Fossils in India

A team of Indo-German geologists and paleontologists have found fossils of a 135-million-year old herbivorous dinosaur in Kutch, Gujarat, possibly the oldest such fossil found this century. The fossil belonged to the time when India and Madagascar were one landmass and the Himalayas yet to form.
Gujarat is considered to be home to one of the largest collection of dinosaur remains in India. A large number of dinosaurs eggs have been discovered at Balasinor, 100 km from Ahmedabad, and fossils have been found near the Narmada banks too. The Kutch Basin, it is believed, was inundated by seawater during the Jurassic period and these repeated over millennia to throw up an extremely varied bio-geography.
The most recent dinosaur fossils from India in this millennium is the “Rajasaurus Narmadensis”, a 30-feet-long, carnivorous and stocky animal, which was discovered from the Narmada Valley Basin in Kheda, Gujarat.
What is Jurassic era?

The so-called Jurassic era spanned 250-145 million years during which herbivorous dinosaurs flourished and laid the ground for beasts, such as the Tyrannosaurus Rex. These flourished during the Cretaceous period —145 to 65 million years ago — after which the double blows of a meteor strike and overflowing volcanoes are said to have destroyed these animals.

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Jan 7, 2016

[CA - Notes] Snowflake Corals

Snowflake Coral
Scientists have recently discovered the presence of several colonies of an invasive species of snowflake coral off the coast of Thiruvananthapuram and Kanyakumari. These fast growing alien species have been discovered at a depth of 10 metres off Kovalam, a beach town by the Arabian Sea in Thiruvananthapuram. Scientists have warned that these invasive species of snowflake coral could pose a serious threat to the marine ecology of the region.
About Snowflake Coral:
·       The snowflake coral or branched pipe coral is a species of soft coral in the family Clavulariidae. The snowflake coral is a colonial soft coral with a tangled, bushy growth form. Its hollow branches go up to 30 centimetres in length, forming a creeping stolon.
·       Native to the tropical western Atlantic Ocean, it has spread to other areas of the world such as Hawaii. In 1972, it was first reported as an invasive species in Hawaii. Since then, it has spread to countries like Australia, Thailand, Indonesia and the Philippines.
·       Being a shade-loving species, snowflake coral grows on hard surfaces, away from direct sunlight. These include caves, overhangs, ledges and under piers.
·       Because of its capacity to dominate space and crowd out other marine organisms, snowflake coral is considered as an invasive species.

·       In India, it was reportedly seen from Andaman and Nicobar Islands, Gulf of Mannar (Tamil Nadu), Gulf of Kutch (Gujarat) and Goa.




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