Těšíte se na nové druhy? Jistě přijdou, ale chce to trpělivost...: Evoluční paradox čtvrtohor

Title:

Těšíte se na nové druhy? Jistě přijdou, ale chce to trpělivost...: Evoluční paradox čtvrtohor

Creator:

Pokorný, Petr

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f34a9eab-9566-4b9c-81fc-9d9487e303f8
uuid:f34a9eab-9566-4b9c-81fc-9d9487e303f8

Type:

article, model:article, and TEXT

Description:

Looking forward new species? Patience, please... Global environmental changes that swept the Earth over Quaternary period have no analogues in the last 250 millions of years. These have caused enormous and repeated changes in life histories of many species. Theoretical models speak about enhanced evolutionary rate in this period due to allopatric speciation and genetic drift. Nevertheless, comparison of speciation frequencies over entire geological history (based on "moleculary clock" and fossil data) shows different pattern. Ther is no extraordinary evolutionary radiation during Quaternary observable. The solution of this dilemma probably resides in temporal scaling: Quaternary changes last too short to promote observable evolutionary changes in the level of species and above. Timing is everything in this story.

Language:

Czech

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Vesmír | 2011 Volume:90 (141) | Number:12

Harvested from:

CDK

Metadata only:

false