Hibernation
In zoology, hibernation is the term used to describe the hibernation of certain animals at the same temperature (almost all mammals ), which are interrupted by numerous waking phases, during the cold season. In contrast to hibernation, the core body temperature does not decrease during hibernation.
The reaction of extra-tropical plants to the hostile environmental conditions prevailing during winter, in particular the lack of liquid water, is referred to as hibernation in gardening and botany . Hibernation refers to seeds or buds , it is called dormancy or dormancy .
Zoological hibernation
The hibernation in the zoological sense occurs in some mammals and denotes a hibernation interrupted by a few short waking phases . During the waking phase, small amounts of food can be ingested and urine and feces can be given off. During the resting phase the metabolic activity of the animals is reduced, but the normal core body temperature is maintained. Winter dormancy is observed in brown bears , raccoon dogs , raccoons , badgers and squirrels , for example .
See also
Horticultural hibernation
In the horticultural sense, the hibernation of the non-tropical vegetation denotes the shedding of the foliage of the deciduous trees or the death of the above-ground parts of the "hardy" perennial herbaceous plants . Winter cereals shot up and bloom in spring only after vernalization in the winter cold spell.
End of hibernation
Most plants need a cold period of 3–5 weeks at 0.5–5 ° C to overcome hibernation. The more the actual temperature deviates from this, the longer this time span increases. Inhibitors like abscisic acid are slowly broken down during rest .
Demarcation
When forced retirement is called the state for fulfillment of the refrigerant need before the end of winter, when outside factors prevent extrusion.
See also
Individual evidence
- ^ Neil A. Campbell, Jane B. Reece: Biologie, Munich 2009, p. 1.167
- ↑ Herder-Lexikon der Biologie, Volume Spini-Zz, page 443, keyword Winterruhe , Spektrum-Verlag, Heidelberg, Berlin, Oxford 1994.
- ↑ Herder-Lexikon der Biologie, Volume Spini-Zz, page 443, keyword Winterruhe , Spektrum-Verlag, Heidelberg, Berlin, Oxford 1994.
- ↑ Heinz Jansen: Horticultural plant production: Basics of cultivation under glass and plastics . Ulmer, Stuttgart 1998, ISBN 978-3-8252-1278-0 , p. 189.