Cold-blooded in the Ice Age: “refugia within refugia”, inter-and intraspecific biogeographic diversification of European whipsnakes (Squamata, Colubridae, Hierophis )

Zoology ◽  
2018 ◽  
Vol 127 ◽  
pp. 84-94 ◽  
Author(s):  
Marcello Mezzasalma ◽  
Mirko Di Febbraro ◽  
Fabio Maria Guarino ◽  
Gaetano Odierna ◽  
Danilo Russo
Author(s):  
Petar Zhelev

During the Ice Age the southern parts of Europe, including Balkans, remained practically unaffected by glaciations and served as refugia for many plant and animal species. However, even within the framework of each glacial refugia, the conditions were not homogeneous and isolated “hot spots” appeared that had led to “refugia within refugia”. The territory of Balkan Peninsula could be subdivided into different zones, which are of different importance from the point of view of formation of the present day biodiversity. Tree species are particularly suitable for studies of inter-glacial and post-glacial migrations, due to their important ecological role in shaping the environmental conditions. Today, studying of these issues is greatly facilitated by introducing of genetic markers, allowing precise tracing of post-glacial migrations. The topic is less studied in the Balkan Peninsula, even though the region is considered one of the most important European refugia. A brief review of the more important studies in this respect is presented and the prospects and importance of such studies is discussed.


Nature ◽  
2005 ◽  
Author(s):  
Mark Peplow
Keyword(s):  

Author(s):  
W.P. De Lange

The Greenhouse Effect acts to slow the escape of infrared radiation to space, and hence warms the atmosphere. The oceans derive almost all of their thermal energy from the sun, and none from infrared radiation in the atmosphere. The thermal energy stored by the oceans is transported globally and released after a range of different time periods. The release of thermal energy from the oceans modifies the behaviour of atmospheric circulation, and hence varies climate. Based on ocean behaviour, New Zealand can expect weather patterns similar to those from 1890-1922 and another Little Ice Age may develop this century.


2008 ◽  
Vol 35 (2) ◽  
pp. 306-318 ◽  
Author(s):  
C. LAVERS ◽  
M. KNAPP

Khutū was a material derived from an animal used by Medieval Asian peoples in the manufacture of knife handles and as an alexipharmic. Al-Bīrūnī (973–1048) made extensive enquiries into the origin of khutū but reached no definite conclusion. Literary scholars in the first half of the twentieth century identified the walrus and narwhal as probable sources, but in ignoring aspects of the literature on khutū’s appearance and provenance left a number of questions unanswered. We clarify and extend this research and identify further clues to the identity of khutū. We concur that walrus ivory was one source of khutū, suggest that the remains of “Ice Age” mammals may have influenced development of the medieval literature on khutū more than previous investigators realized, and offer a new hypothesis of khutū’s origin.


2004 ◽  
Vol 83 (2) ◽  
pp. 228-230
Author(s):  
Richard Tipping
Keyword(s):  

2013 ◽  
Vol 6 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Anastasia Gornostayeva ◽  
◽  
Dmitry Demezhko ◽  
◽  
Keyword(s):  

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