新闻 > 社会
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China

蜜蜂若灭绝人类只能活四年?并非耸人听闻

2017-09-19 15:27:41   新华社

总体数量有所上升,但是物种多样性急降

刁青云表示,其实单从数量上来说,国内蜜蜂整个群体数量可能应该是上升的,因为得益于国内人工养殖家蜂数量的增长。人工饲养蜜蜂整体是可控的,既可以灵活移动,也能训练其进行特定的采集活动。2014年联合国粮农组织(FAO)给出的数据显示,中国人工饲养蜂群数量为907万,近几年仍呈上升趋势。

但由于缺乏更多的持续性检测类项目,野生蜜蜂的种群数量上就难以做出一个确切统计。朱朝东介绍,在我国,有多达1342个蜜蜂物种被记述,实际物种数量可能会更多。不过,中国野生蜜蜂的生存状况并不容乐观,很多野生蜜蜂的物种在被人发现之前,就可能已经灭绝。

朱朝东表示,蜜蜂物种丰富,很多人遇到蜜蜂就担心被蜇这种忧虑是根本不必要的,大部分蜜蜂物种对访花更感兴趣。少量蜜蜂种类还会像杜鹃鸟一样,在别的物种的巢穴内形成盗寄生现象。

朱朝东所在的研究组近年来一直在对西双版纳的橡胶林和江西的油茶林进行传粉昆虫多样性监测与研究工作。他们发现橡胶林的成林里,蜜蜂多样性要远远少于河边和天然林;地表植被被过度清除的油茶林,也不利于传粉蜜蜂的生存和繁衍。

即使在全世界范围内,蜜蜂物种种群数量也呈一个整体下降的趋势,朱朝东向北京科技报|“科学加”客户端记者分享了2016年世界自然保护联盟(IUCN)发布的濒危物种红色名录,其中31个种类的蜜蜂赫然在目:包括30种熊蜂(Bombus)和1种切叶蜂(Megachile),其中极危3种,濒危1种,易危4种,无危18种,数据缺乏5种。

▲周氏啮小蜂,是姬小蜂科啮小蜂属的一种优势寄生蜂,对美国白蛾等有害生物“情有独钟”,目前常被用于生物防治(图片来自网络)

杀虫剂、化肥、花期集中都导致蜜蜂减少

刁青云表示,全世界蜜蜂生存都面临着巨大威胁,首当其冲的是环境气候发生的巨大变化。无论是空气水体的污染还是二氧化碳的大量排放导致温度升高,这些因素都对野生传粉蜜蜂和植物之间的物候产生影响,从而导致发生时段不匹配;也会对它们的水源、食源,甚至是生长发育造成了巨大的影响。

其次城市化占地进程加快,人工植被的大量种植也会造成蜜蜂生存环境的流失、断裂和退化。

上一页4/7下一页
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China

相关阅读

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
分享到:
0 0
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China

美图推荐

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China

为您推荐

加载更多>>
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170919/31470361_4.html
Server: cms-9-53
Date: 2024/12/04 04:02:59

Powered by China
China