首页
登录
职称英语
Honeybee populations declined by 13.6% over the winter, according to a surve
Honeybee populations declined by 13.6% over the winter, according to a surve
游客
2023-08-09
65
管理
问题
Honeybee populations declined by 13.6% over the winter, according to a survey of beekeepers across England. Losses were most severe in the north-east, where the survey recorded a loss rate of 17.1%.
Experts worry that the declines will affect plant productivity. There are also concerns that the declines, along with drought conditions in some area, will mean less English honey this year.
Martin Smith, president of the British Beekeepers Association, which carried out the survey, said: "If this was measured against similar losses in livestock, it would be seen as disastrous and there would be great concern on the knock-on impact of food prices."
Beekeepers are puzzled by the decline because the cold winter and early spring should have favoured bees. They stay "clustered" tightly in their hives when it is cold and dry, saving energy for spring foraging when the temperature rises about 12°C.
However, there is good news that the rate of colony loss has slowed. Four years ago, one in three hives was wiped out.
Beekeepers suspect that poor nutrition is a likely cause of weakness in adult bees that makes them succumb to diseases spread by a parasitic mite.
"The varroa mite is the number one reason why people lose bees, so the government needs to increase research to cure diseases caused by varroa," said Smith. "But a colony that has a good source of pollen and nectar will go into winter more strongly and better able to fend off disease."
The association is calling on everyone who has a garden, small, to plant bee-friendly plants this summer. "It is really important that there are flowering nectar-rich plants around in August, September and October to provide the nutrition that’s needed so the bees can top up their stores of honey in the hive to see them through winter," said Smith.
A campaign being launched next week to save all bees, spearheaded by Sam Roddick and Neal’ s Yard Remedies, pins the blame for the decline on pesticide. It will start a petition to hand to Downing Street in October to ban the use of a class of pesticides that has been implicated in bee deaths across the world.
Roddick said, "These neonicotinoid pesticides penetrate the plant and indiscriminately attack the nervous system of insects that feed off them, disorientating bees, impairing their foraging ability and weakening their immune system, causing bee Aids. On current evidence, Italy, Germany and Slovenia have banned some varieties. In the UK, it’s up to the people to show the government that if there is any doubt that they are contributing to bee deaths, we need to ban them."
A spokesman for the government’s National Bee Unit said: "The UK has a robust system for assessing risks from pesticides and all evidence shows neonicotinoids do not pose an unacceptable risk when products are used correctly, but we will not hesitate to act if presented with any new evidence." [br] According to the bee experts, which is not the possible cause of the decline of bee populations in this passage?
选项
A、The cold weather.
B、The poor nutrition of bees.
C、The varroa mites.
D、The neonicotinoid pesticides.
答案
A
解析
细节题。文章第四段提到Beekeepers are puzzled by the decline because thecold winter and early spring should have favoured bees.(蜂农们对蜜蜂数量的下降感到很迷惑,因为寒冬季早春应该有利于蜜蜂的生存),可见在经验丰富的养蜂专家看来,寒冷的天气并非蜜蜂数量下降可能的原因。故选择A项。B、C、D三项文章均有提到。
转载请注明原文地址:https://tihaiku.com/zcyy/2909809.html
相关试题推荐
应运而生appearaccordingly
据相关资料显示,到去年年底,中国智能手机市场已成为全球智能手机出货量(shipment)第一的市场。Accordingtorelateddata,by
依据inaccordancewith;baseon;accordingto
[originaltext]Thewintergift-givingseasonisresponsiblefortwentypercento
WhyhascrimeintheU.S.declinedsodramaticallysincethe1990s?Econom
WhyhascrimeintheU.S.declinedsodramaticallysincethe1990s?Econom
UsingFacebookmakespeoplesadder,atleastaccordingtosomeresearch.But
UsingFacebookmakespeoplesadder,atleastaccordingtosomeresearch.But
UsingFacebookmakespeoplesadder,atleastaccordingtosomeresearch.But
AccordingtoareportfromtheHarvardSchoolofPublicHealth,manyeveryda
随机试题
TaskOneForquestions13-17,matchtheextractswiththehotel,listedA-H.F
Thefollowingisaletterrecommendingaproduct.Afterreadingit,youarerequ
Doyouthink__________________(有可能在本周内完成这项工作吗)?itpossibletofinishthework
Theitalicizedpartinthesentence"Manypeopleobservedtheshipleavingtheh
[originaltext]W:Dad,canIgotoamoviewithSharon?M:Yeah,sure,butwait.
有关带状疱疹特点的叙述哪项是正确的A.非病毒感染 B.疱疹无规律性分布 C.
大调式中的不稳定音级包括( )等。A.第Ⅰ级 B.第Ⅲ级 C.第Ⅳ级 D
心包摩擦音和胸膜摩擦音的鉴别要点是A.有无心脏病史 B.呼吸是否增快 C
下列不属于糖皮质激素的药理作用的是()A.抗炎作用 B.免疫抑制 C.
根据《安全生产法》,关于企业安全生产管理机构和安全生产管理人员配备的说法,正确的
最新回复
(
0
)