woolly mammoths died for want of a few herbs - best dehydrated food
by：IKE Food Machinery 2020-02-08
Kathryn brashkett is a super food for Dunnett.
When climate change takes away the best food and Colon of the mammoth, the mammoth may starve to death;
Perhaps surprisingly, given their size and the cold climate of life, it is believed that the mammoth survived by the food of grassland grass.
But this is not the whole story.
A study of frozen stomach contents and frozen DNA in the soil throughout the Arctic shows that ice
Older animals mainly eat a richer plant called.
At first glance, the difference seems negligible.
For are flowering herbs, and modern examples include Clover.
However, although the grass is difficult to digest and the nutrition is relatively low, they have a high protein content.
By carefully examining the plant DNA found in samples of permanent frozen layers excavated at 200 sites in the Arctic, Eske Willerslev of the University of Copenhagen, Denmark, and his colleagues were able to portray the scenery from 50,000 years ago to today.
They found that in the beginning, the far north was covered with abundant forests.
In addition, the intestinal contents of some large animals living in the area, such as mammo elephants and long-haired elephants, show that these nutritious wild flowers are an important part of their diet (
Nature, DOI and colon cancer. 10.
"Technically, this is a great achievement," said Adrian Lister of the Natural History Museum in London . ".
But Forbes did not last long.
"About 20,000 years ago, during the peak of the ice age, the environment became very, very cold and dry, and we saw a big drop --
"In the diversity of Forbes," says flesleff . ".
"They still dominate the ecosystem, but their diversity has declined.
"The real killer was at the end of the Ice Age 12,000 years ago.
Grass and shrubs begin to replace branches-changes in this landscape coincide with the reduction of the iconic ice --age megafauna.
Since forbs are stimulated by stepping on their feet, the reduction of forbs from 20,000 years ago may lead to a feedback cycle in which, the decrease in the number of animals will lead to a decline in plant diversity in food supply and a further decrease in the number of animals.
Willerslev said: "Our research does change the general concept that you have a huge grassland before the last warming period, which is to maintain the diversity of mammals.
"In fact, it is a prairie of all kinds of forests, which may be crucial.
The theory also explains why reindeer are the only big ice cubes.
The age of animal survival.
Today, reindeer chew grass and salsa in the summer and live in low-lying environments
Winter energy Moss.
The decline of Forbes will pass.