New’s
title: Hellbenders need help!
Date
of publication: February the 6th, 2015
Source
of information: Student Society for Science
Scientific field: Animals, environment and pollution.
Extract:
Recent studies have estimated that threats to these giant amphibians could spell trouble
for everyone. This threats include habitat destruction, pollution and climate
change.
As a result,
populations in many areas are shrinking or even disappearing. In recent years,
biologists have been finding fewer and fewer young hellbenders in many wilds
rivers. Toxic chemicals and removing water for fracking or other uses can make problems worse.
Critical
appraisal:
This article reveals
the enormous problematic related to the giant amphibians called hellbenders.
In the first place, I’d like to say that
hellbenders have already disappeared from some of the streams because humans
have ruined their habitats in many places.
Secondly,
I think that we should take more care of our planet. I believe that we should
leave our world as pure as we can because future generations don’t deserve to
live in such a contaminated world.
Luckily,
amid this reality there are many biologist investigated the reasons for
disappeared. In 2011 they get hellbenders to reproduce at the zoo and lab
studies also examine DNA to see how
closely related different animals are and if there are any signs of inbreeding.
Glossary:
-Inbreeding:
The mating of animals that are too closely related, genetically. It is the
opposite of genetic diversity. Animals that are inbred tend to become weak or
sickly and often cannot reproduce successfully.
- DNA:
A long, double-stranded and spiral-shaped molecule inside most living cells
that carries genetic instructions. In all living things, from plants and
animals o microbes, these instructions tell cells which molecules to make.
- Amphibians:
A group of animals that includes frogs, salamanders ans caecilians. Amphibians
have backbones and can breathe through their skin.
-Fracking : the cracking open of
underground rocks by introducing liquid
at high pressure, especially to extract natural gas. Those cracks are then held
open by sand that been added to the fracking fluid.
Written by Lidia Figueras
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