日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

Global EditionASIA 中文雙語Fran?ais
China
Home / China / Environment

Expedition goes deep to safeguard Shuanghe Cave

By Zhao Yimeng | China Daily | Updated: 2023-12-19 20:02
Share
Share - WeChat
Students and teachers from Beijing Forestry University explore the Shuanghe Cave in Guizhou province in November. GENG GUOBIAO/FOR CHINA DAILY

Beijing Forestry University students and teachers recently took part in a "crossover expedition" in Asia's longest cave in Guizhou province, conducting experiments with experts to better understand and protect its rare ecosystem.

A previous survey of Shuanghe Cave conducted by an international team of experts that was released in September this year, showed it to be 409.9 kilometers long and 912 meters deep.

Zhou Wenlong, deputy director of the Guizhou Institute of Mountain Resources and an official with the Geological Society of China's Committee on Speleology, said during 35 years of scientific expeditions in Shuanghe Cave, international experts have discovered 40 giant panda fossils and geological relics of celestite.

"It is the longest dolomite cave with the largest celestine area in the world," Zhou said, adding that the cave is described as a "karst natural cave museum".

Zhou also led the students' crossover expedition to the cave in late November. He said they conducted simple experiments with diluted hydrochloric acid to examine the chemical dissolution of carbonate rocks in the karst landscape.

Li Hanqing, a postgraduate student who participated in the expedition, wrote about the experience in her journal.

"We can see that water plays an indispensable role in the formation of caves. Water promotes the development of caves, and also erodes caves," Li said.

"A unique landscape is formed in the cave thanks to the participation of water and carbon dioxide. First, a type of rock 'soda straw' is generated. Then stalactites and stalagmites are formed, and later connected to become stone column."

Although the eight university students and teachers are not experts in the field of speleology, they still found something familiar in the caves — lampenflora, autotrophic life-forms present in natural and artificial caves.

Installed lighting in show caves — those open to the public for observation — can cultivate plants, which can grow if they have enough artificial light and moisture.

Zhou said lampenflora is a big problem for researchers as it changes the appearance of show caves and leaves visitors with the wrong impression of natural caves.

Acids secreted by lampenflora can also cause damage to rocks, disturbing a cave's ecology, he added.

"I hope these students and teachers can try fixing the problem of light plants through their forestry studies," Zhou said.

1 2 Next   >>|
Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 婷婷激情综合五月天 | 9久久9久久精品 | 91av久久 | 日本高清视频在线三级 | 成人高清| 精品欧美乱码久久久久久1区2区 | 日本一区免费在线观看 | 欧美ol丝袜高跟秘书在线播放 | 国产一级免费在线视频 | 操人视频在线观看 | 亚洲精品久久久久久无码AV | 欧美日韩性高爱潮视频 | 亚洲人成人 | 黄色免费高清网站 | 99热久久国产精品免费看 | 欧美成人一区二区三区 | 27xxoo无遮挡动态视频 | 国产精品高潮呻吟久久av黑人 | 在线看免电影网站 | 国产在线午夜 | 中文字幕欧美在线 | 精品午夜寂寞影院在线观看 | 91精品国产综合久久久蜜臀粉嫩 | 草草网 | 久久88香港三级 | 22eee在线播放成人免费视频 | A片好大好紧好爽视频 | av毛片在线免费看 | 午夜影院在线视频 | 日本在线播放一区二区 | 国产精品视频播放 | 日日拍夜夜嗷嗷叫视频 | 在线亚洲成人 | 久久久久久久综合日本亚洲 | 大香萑75久久精品免费 | 天堂最新资源在线 | 91色综合 | 国产精品久久久久久久久久免费 | 国产毛片视频在线 | 亚洲综合国产一区二区三区 | 久草资源总站 |