21 Percent of World’s Plants Could Disappear
One in five of the world's plants is currently at risk of disappearing forever. That is what a report by the Royal Botanic Gardens in London says.
The report is one of the first to try to describe all the plants known to science. It says scientists have so far identified 391,000 plants. And, it says, more than 80,000 of those are in danger of becoming extinct.
Why are plants disappearing?
The plants are endangered by growing populations and clearing land for agriculture and urban development.
Steve Bachman is a researcher with the Royal Botanical Gardens.
"There's a lot of mouths to feed in the world now and that's growing, and we need the land. So basically the land's natural habitat is being converted so that we can have soya plantations, crops, livestock, and as a result, that's really causing species to lose their habitat."
Plants are also threatened by logging and climate change.
Scientists say governments should do more to create protected areas.
Kathy Willis is director of science at the Royal Botanic Gardens. She says scientists need to identify which areas are important to conserve, or protect, for their diversity.
Willis also says scientists need to identify which areas should be developed.
Some plants are stars – but most do not get much attention
Even while some plants are disappearing, scientists are discovering others. Each year, scientists identify about 2,000 new plants.
Last year, a specialist discovered a new plant in Brazil while viewing photographs posted on Facebook by a fan of flowers. The plant is a 1.5 meter insect-eating sundew.
What are sundews?
They are one type of carnivorous plant. In other words, they trap and eat insects for food. These kinds of insect-eating plants are very popular on the Internet.
But other plants do not get the same amount of attention.
Scientists says a general lack of interest in plants creates problems. Botany — the study of plants — is just not one of the more popular subjects in school.
Kathy Willis says people should study botany because plants are so important to humans.
"It's very rarely taught as 'this is a really important discipline because plants underpin all aspects of our human well being,' from climate regulation, through to food and fiber and fuels."
But collecting and recording data on plants is a very difficult job. So difficult that botanists find it almost impossible to document all the plants that are becoming extinct.
I'm Anne Ball.
1.One in five 五分之一
Nearly one in five Americans lives with a disability.
2.so far 目前
Now, I have so far merely made assertions.
3.in danger 垂危
I grasped that I was in danger.
4.at risk 处于...危险
Were those patients now at risk?
1.The plants are endangered by growing populations and clearing land for agriculture and urban development.
urban development 城市发展
He submitted his proposal for urban development to the city council.
The directions of urban development have been marked out.
2.Plants are also threatened by logging and climate change.
climate change 气候变化
We are all victims of climate change.
There is no solution to the question of climate change without forestry.
全球五分之一的植物物种正面临灭绝风险 。这是英国皇家植物园所发布的报告内容 。
这是有关世界植物现状的第一份全球性报告 。报告中记录了迄今为止科学家们已经发现的植物约39.1万株 。其中约8万种植物面临灭绝的危险 。
“世界上人口众多且仍在不断增长，我们急需土地 。所以一些土地被不断开垦出来，我们种植大豆、农作物、放牧牲畜，结果导致其他的物种失去赖以生存的环境 。”
凯茜·威利斯教授是皇家植物园的科学主管 。她表示，为了保护物种多样性，科学家需尽快确定哪些地方是重点保护区域 。
虽然有些植物在逐渐消失，但科学家发现了其他的植物品种 。每年新发现的植物物种达到2000个 。
去年，一位专家看到Face book上网友分享的一株植物图片后，最终在巴西发现了这种植物 。这种茅膏菜属大型食虫植物最高可达1.5米 。
茅膏菜是一种食虫植物 。换句话说，它们诱捕昆虫做食物 。这些以昆虫为食的植物在互联网上非常受欢迎 。
缺乏对植物的研究兴趣是主要原因 。所谓植物学，不应只是学堂上一门受欢迎的课程而已 。
然而，收集植物并记录相关数据不是件容易的差事 。植物学家称几乎不可能将所有濒临灭绝的植物全部登记在册 。