Science, Том 314,Выпуски 5796-5801John Michels (Journalist) American Association for the Advancement of Science, 2006 |
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Стр. 103
... rates . Such estimates are currently unavailable even for most large groups with a good fossil record and may not be feasible for groups lacking a fossil record without assuming stochastically constant extinction rates ( 22 ) , an ...
... rates . Such estimates are currently unavailable even for most large groups with a good fossil record and may not be feasible for groups lacking a fossil record without assuming stochastically constant extinction rates ( 22 ) , an ...
Стр. 105
... rates . These data must again be treated cautiously , owing to the severe undersampling of the tropics , but the presence of so many last occurrences at high latitudes constrains potential patterns and suggests that tropical extinction ...
... rates . These data must again be treated cautiously , owing to the severe undersampling of the tropics , but the presence of so many last occurrences at high latitudes constrains potential patterns and suggests that tropical extinction ...
Стр. 121
... rate declined to background be- tween speciation events but was assumed to be " recharged " by successive events of specia- tion , the phenomenon becomes indistinguish- able from punctuational change . Elevated rates associated with ...
... rate declined to background be- tween speciation events but was assumed to be " recharged " by successive events of specia- tion , the phenomenon becomes indistinguish- able from punctuational change . Elevated rates associated with ...
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