The Seasons: Life and Its Rhythms |
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Page 167
... caves offer an environment worthy of study . After all , only a very few yards and twists from the entrance of a cave is a dark world , unaware of the passage of night and day , and largely unaware of seasonal change , of warmth and ...
... caves offer an environment worthy of study . After all , only a very few yards and twists from the entrance of a cave is a dark world , unaware of the passage of night and day , and largely unaware of seasonal change , of warmth and ...
Page 168
... cave it never fell below 77 % and at the end of this cave – steps which had no stream running through it - humidity never fell below 96 % . In other words the end of this short shaft only varied its temperature by 3 ° F ( 1-6 ° C ) ...
... cave it never fell below 77 % and at the end of this cave – steps which had no stream running through it - humidity never fell below 96 % . In other words the end of this short shaft only varied its temperature by 3 ° F ( 1-6 ° C ) ...
Page 311
... cave - dwelling , 168 , 185-6 ; by hibernating , 239 ; colour as adaptation , 282-7 aestivation , 253-5 Afghanistan ... cave , 167–8 basophil cells , 210 bat : fruit , 185 ; Mexican free - tailed , 222 ; Hebri- dean , 216 bats : arrested ...
... cave - dwelling , 168 , 185-6 ; by hibernating , 239 ; colour as adaptation , 282-7 aestivation , 253-5 Afghanistan ... cave , 167–8 basophil cells , 210 bat : fruit , 185 ; Mexican free - tailed , 222 ; Hebri- dean , 216 bats : arrested ...
Contents
List of Diagrams | 9 |
The Calendar | 17 |
The Basic Rhythms | 51 |
Copyright | |
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activity adaptation aestivation animals annual Antarctica Arctic Arctic circle astronomical autumn average axis basic basking shark behaviour bird migration birds breeding season cause cave climate cold continents cool-temperate cycle dark daylength desert despite Earth effect eggs environment equator example exist extremely fact ferret flower gland growth heat hibernation hormone human hypothalamus ice age inches insects land latitude leaf lemming less light living long day plants mammals metabolism migration miles million monsoon month moon nest night normal northern hemisphere oestrogen orbit organisms oxygen palolo worm period pituitary pituitary gland plants polar poles pressure rain rainfall regions rhythm round the sun sexual short day plants similar situation snow snow buntings southern species spring square miles summer surface temperate world temperature torpor trees trigger tropical warm warmer warmth weather winds winter zeitgebers zone