Download Migration of Organisms: Climate Geography Ecology by Ashraf M. T. Elewa (auth.), Dr. Ashraf M. T. Elewa (eds.) PDF

By Ashraf M. T. Elewa (auth.), Dr. Ashraf M. T. Elewa (eds.)

In the common-sense, migration is taken into account via many authors as a mechanism for heading off negative environments by means of relocating to expectedly extra auspicious destinations at diversified occasions. In different phrases, migration could characterize the seasonal stream of organisms from position to put because of the switch within the environmental stipulations. as a result, vital questions come up to brain, why perform a little animals migrate? How may migration impact the gene pool? no matter what are the solutions, the price of migration is the ability required to maneuver to another place and the excessive threat of loss of life because of this stream.

The editor provides an appropriate number of issues, to accomplish the aim of this booklet, that's explaining the migration of organisms via many examples of alternative teams of marine and non-marine organisms, starting from micro-invertebrates to massive vertebrates (mammals), and targeting a number of features that aren't accrued together.

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Additional resources for Migration of Organisms: Climate Geography Ecology

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13), Asymmetricythere yousefi Bassiouni 1971 (sp. 15), Acanthocythereis projecta Bassiouni 1969b (sp. 16), Krithe bartonensis (Jones 1857) (sp. 17), Reticulina heluanensis MTB (Bassiouni 1969b) (sp. 18), Cytherella rayanensis Elewa 1999 (sp. 21), Cativella qurnensis Bassiouni 1969b (sp. 22). This biofacies is mostly distributed in the Qarara Formation of section 5. The base of this formation signifies turbulent water conditions (presence of shallow water species as Schizocythere fadlensis Cronin and Khalifa 1979 and Martinicythere samalutensis samalutensis Bassiouni 1969d together with deep water ones such as Krithe bartonensis (Jones 1857)).

21-22; Boukhary et al. 1982, p. 62, pl. 2, figs. 7-8; Aref 1982, p. 179, pl. 22, figs. 7-8; Elewa 1994, p. 156, pl. 4, figs. 4-6; Elewa 1997, p. 373, fig. 20: 9, 10. - Male carapaces are more elongate and with a more acute postero-dorsal end than female carapaces. - The Maghagha Formation; the middle Eocene of sections 3, 4 of the study area. - middle Eocene (early to late Lutetian; P10-14). Loxoconcha blanckenhorni Bassiouni and Luger 1990 (Fig. 9-3) 48 Ashraf M. T. Elewa Loxoconcha blanckenhorni Bassiouni and Luger 1990, p.

Guernet et al. 1991, pl. 1, figs. 6, 8. - The figured specimens of Guernet et al. (1991, pl. 1, figs. 6, 8) as Schizocythere sp. seems to represent Schizocythere fadlensis Cronin and Khalifa. - The Qarara Formation; the middle Eocene of section 5 of the study area. - middle Eocene (late Lutetian). Subfamily Trachyleberidinae Sylvester-Bradley 1948 Paleoecology and paleogeography of Eocene ostracods from the Nile Valley 49 Genus Trachyleberis Brady 1898 Trachyleberis nodosus Bassiouni 1969b (Fig.

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