日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

Make me your Homepage
left corner left corner
China Daily Website

Threats stem from lack of statistics, over-harvesting

Updated: 2012-12-17 07:48
By Li Yao and Daqiong ( China Daily)

First Person | Daniel Winkler

Threats stem from lack of statistics, over-harvesting

Editor's note: Daniel Winkler, a German ecologist, has researched caterpillar fungus and its economic effects on China for 15 years. A study he conducted in 2005 with Losang Dradul of the China Tibetology Research Center motivated authorities in the Tibet autonomous region to introduce a licensing system for fungus harvesting and to keep track of the yearly output.

Over-harvesting and poor statistical tracking of caterpillar fungus are major challenges for the sustainable management of the medicinal resource.

Many rural Tibetans rely on this fungus for their incomes, and if anything happens to it, they will face big problems.

Collectors should realize old, low-value caterpillar fungus is better off left in the ground to spread spores for the next year. But at the moment, hundreds of thousands of people are going into the mountains to collect as much as they can. They can't find everything, but not much is left, and if the situation remains unchecked, the resource will be depleted sooner or later.

Authorities should shorten the harvest season and further limit the number of collectors - for example, only two members should come from each household.

If these restrictions are to work, the key is education. Officials need to work with community leaders to raise awareness to protect the resource so they can benefit for many years to come.

I visited Tibetan communities with collection rights in Yushu prefecture, Qinghai province, with representatives from the China branch of the World Wildlife Fund for Nature. I showed images to villagers to explain the fruiting stages of caterpillar fungus and the different market values.

It only took a few minutes to convince them that the mushroom needs spores to reproduce, contrary to local belief that it just grows by itself every year.

Policymakers should regulate the market to put people off old, low-value caterpillar fungus, which shrinks substantially after it's dried. Then collectors will have the incentive to give up collecting it.

The price rose by 900 percent between 1998 and 2008, when it then dropped 20 percent due to the financial crisis. The rise in price over the past four years is not as high as before, but harvests have fluctuated, as abundant production depends on sufficient rain and snowfall.

There are several research institutes in China devoted to genetic studies and artificial cultivation of caterpillar fungus, which is good news for Tibetan collectors who face serious competition and a price collapse.

However, more resources should be used to find out how to manage the collection of a natural product in a sustainable way, rather than learn how to cultivate artificial ones.

Daniel Winkler was talking to Li Yao and Daqiong.

(China Daily 12/17/2012 page4)

 
...
...
主站蜘蛛池模板: 一区二区视频免费观看 | 欧美亚洲图区 | 波多野结衣在线观看一区二区 | 中文字幕亚洲专区 | 国产精品成人在线视频 | 欧洲在线观看 | 免费一级全黄少妇性色生活片 | 日批动态图| 国产xxx在线观看 | 天堂视频在线观看免费 | 精品久久久久久久久久久久久 | 亚洲黄色免费网站 | 欧美午夜网站 | 8x8x华人在线观看 | 久久久久久久精 | 天天爱天天操 | 不卡欧美| 久久亚洲视频 | 亚洲更新最快 | 欧美hdse| 在线观看 | 爆操老女人| 在线观看国产日韩 | 国产成人av网站 | 亚洲伊人网站 | 亚洲综合成人网 | 亚洲欧美自偷自拍 | 黄色av一区二区 | 久久久人人人 | 99久久婷婷国产综合精品草原 | 欧美v日韩 | 天天狠狠 | av综合网站 | 黄色成人在线播放 | 精品91一区二区三区 | 国产91高清 | 91精品国产亚洲 | 天天综合亚洲 | 亚洲免费视频观看 | 特级毛片在线 | 天天做天天爱天天爽综合网 |