casper
The Living Force
I'll be back again to the question of the C: how good you are at skiing?
(Skiing on snow or water?)
Quote:
Where are the emperor penguins survived the last ice age
The study of how climate change affected the imperial penguins in the last 30 000 years reveals that most likely only three populations survived the last ice age. Ross Sea near Antarctica, it is assumed, there is a shelter of one of these populations.
It seems that the Ross Sea was a haven of emperor penguins thousands of years ago during the last ice age, when most of Antarctica was uninhabited because of the amount of ice.
The findings published 1.3. in the journal Global Change Biology suggest that, in contrast to the current climatic conditions that are optimal for the imperial penguins, climatic conditions in the past were too extreme for the survival of large populations.
A team of scientists and scientists from the University of Southampton, Oxford and Tasmania investigate the genetic diversity between the present and ancient population of emperor penguins in Antarctica to assess how they have changed over time.
This species is known for its good adaptation to icy conditions and inhabited in sea ice during the Arctic winter when temperatures regularly drop below 30 ° C. However, a team of scientists and researchers found that the conditions of the last ice age were extremely unfavorable to the imperial penguins and that their population was about seven times lower than today and is divided into three.
Gemma Clucas, PhD student at the University of Southampton (Earth science and oceans) and one of the leading authors of the study, explains: "Since it was about twice as much ice at sea during the last ice age, the penguins were able to dwell only on several locations around Antarctica. Distance from the open ocean, where the penguins fed, until a stable ice, where they were bred, was probably too high. The three populations that survived were successful because they lived in the vicinity of polynyas - areas of the ocean where due to the effects of wind and current no sea ice. "
One of these polynyas, which is to protect the population of emperor penguins during the last ice age, there was likely to Diana Ross Sea. It was discovered that the emperor penguins, which settled in the Diana Ross Sea genetically different from other emperor penguins across Antarctica.
Jane Younger, PhD student at the Australian Institute of Marine and Antarctic science and the other lead author of the research, said: "Our research suggests that the populations were isolated during the last ice age and points to the fact that the Ross Sea might be important shelter emperor penguins, and other species. "
There is a possibility that, from all areas of Antarctica, Ross Sea latter was affected by climate change. In the last two decades in the Diana Ross Sea extent of sea ice has increased, although it is due to climate change could be expected to be reduced. However, it is envisaged that this will change by the end of the century.
Dr Tom Hart University of Oxford and one of the organizers of this study adds to the interesting fact that the Ross Sea functioned as a refuge separate population and highlights to why this can not be particularly protected.
(Skiing on snow or water?)
Quote:
Where are the emperor penguins survived the last ice age
The study of how climate change affected the imperial penguins in the last 30 000 years reveals that most likely only three populations survived the last ice age. Ross Sea near Antarctica, it is assumed, there is a shelter of one of these populations.
It seems that the Ross Sea was a haven of emperor penguins thousands of years ago during the last ice age, when most of Antarctica was uninhabited because of the amount of ice.
The findings published 1.3. in the journal Global Change Biology suggest that, in contrast to the current climatic conditions that are optimal for the imperial penguins, climatic conditions in the past were too extreme for the survival of large populations.
A team of scientists and scientists from the University of Southampton, Oxford and Tasmania investigate the genetic diversity between the present and ancient population of emperor penguins in Antarctica to assess how they have changed over time.
This species is known for its good adaptation to icy conditions and inhabited in sea ice during the Arctic winter when temperatures regularly drop below 30 ° C. However, a team of scientists and researchers found that the conditions of the last ice age were extremely unfavorable to the imperial penguins and that their population was about seven times lower than today and is divided into three.
Gemma Clucas, PhD student at the University of Southampton (Earth science and oceans) and one of the leading authors of the study, explains: "Since it was about twice as much ice at sea during the last ice age, the penguins were able to dwell only on several locations around Antarctica. Distance from the open ocean, where the penguins fed, until a stable ice, where they were bred, was probably too high. The three populations that survived were successful because they lived in the vicinity of polynyas - areas of the ocean where due to the effects of wind and current no sea ice. "
One of these polynyas, which is to protect the population of emperor penguins during the last ice age, there was likely to Diana Ross Sea. It was discovered that the emperor penguins, which settled in the Diana Ross Sea genetically different from other emperor penguins across Antarctica.
Jane Younger, PhD student at the Australian Institute of Marine and Antarctic science and the other lead author of the research, said: "Our research suggests that the populations were isolated during the last ice age and points to the fact that the Ross Sea might be important shelter emperor penguins, and other species. "
There is a possibility that, from all areas of Antarctica, Ross Sea latter was affected by climate change. In the last two decades in the Diana Ross Sea extent of sea ice has increased, although it is due to climate change could be expected to be reduced. However, it is envisaged that this will change by the end of the century.
Dr Tom Hart University of Oxford and one of the organizers of this study adds to the interesting fact that the Ross Sea functioned as a refuge separate population and highlights to why this can not be particularly protected.
