蜜蜂如何驱散蜂箱内部的热量 Honey bees, especially the young, are highly sensitive to temperature and to protect developing bees, adults work together to maintain temperatures within a narrow range. Recently published research led by Philip T. Starks, a biologist at Tufts University s School of Arts and Sciences, is the first to show that worker bees dissipate excess heat within a hive in process similar to how humans and other mammals cool themselves through their blood vessels and skin. This study shows how workers effectively dissipate the heat absorbed via heat-shielding, a mechanism used to thwart localized heat stressors, says Starks. The research is published in the June 10 edition of the journal Naturwissenschaften, which appeared online April 24. This discovery also supports the theoretical construct of the bee hive as a superorganism -- an entity in which its many members carry out specialized and vital functions to keep the whole functioning as a unit. Young bees develop within wax cells. For healthy development, the youngsters must be maintained between 32 degrees Celsius, or 89.6 degrees Fahrenheit, and 35 degrees Celsius, or 95 degrees Fahrenheit. In contrast, adults can withstand temperatures as high as 50 degrees Celsius, or 122 degrees Fahrenheit Previous research has shown that workers bees, among other duties, control the thermostat essential to the hive s survival. When temperatures dip, worker bees create heat by contracting their thoracic muscles, similar to shivering in mammals. To protect the vulnerable brood when it s hot, workers fan the comb, spread fluid to induce evaporative cooling, or -- when the heat stress is localized -- absorb heat by pressing themselves against the brood nest wall .
英语四级阅读是否好赌竟由遗传基因决定
英语四级考试仔细阅读练习28含24
英语四级深度阅读的答案
英语四级仔细阅读原文出处
英语四级阅读南极洲科研考察
英语四级快速阅读的答案及解析
英语四级深度阅读答案
四级阅读选词填空的试题及答案
英语四级仔细阅读sectionB答案
12月四级阅读怎样面对强势的人说不
四级快速阅读答案
英语四级考试仔细阅读练习66含65
英语四级考试仔细阅读练习32含28
英语四级阅读从颜色洞察人的性格
英语四级仔细阅读部分Section
英语四级阅读总结和反省每天工作的必要性
英语四级考试仔细阅读练习40含36
英语四级考试仔细阅读练习12含8
英语四级快速阅读答案
12月四级阅读世界传统医药日传统中医知多少
英语四级阅读备考材料
英语四级仔细阅读答案及解析
英语的四级阅读答案
12月四级阅读怎样跟朋友借钱避免伤感情
英语四级考试仔细阅读练习56含53
英语四级考试仔细阅读练习8含5
英语四级考试仔细阅读练习64含63
英语四级考试仔细阅读练习24含20
英语四级阅读个税起征点提至3500
英语四级快速阅读原文的出处
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |