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Könyv Evolutionary Ecology and the Transition to Multicellularity Cristian A. Solari

Evolutionary Ecology and the Transition to Multicellularity

Hydrodynamics and the Volvocalean Green Algae as a Model System to Explain the Evolution of Multicellularity and Cellular Differentiation

Szerző: Cristian A. Solari
Nyelv: Angol
Kötés: Puha kötésű
Kiadó: VDM Verlag Dr. Mueller E.K.
Elérhetőség: Beszállítói készleten
Küldés 14-21 napon belül
19 542 Ft
The fitness of any evolutionary unit can be understood in terms of its two basic components: fecundi...

Információk a könyvről

Szerző
Cristian A. Solari
Nyelv
Angol
Kötés
Könyv - Puha kötésű
Kiadva
2008
oldal
88
EAN
9783836492478
ISBN
3836492474
Enbook ID
07092599
Kiadó
VDM Verlag Dr. Mueller E.K.
Súly
127
Méretek
152 x 229 x 5

Teljes leírás

The fitness of any evolutionary unit can be understood in terms of its two basic components: fecundity and viability. The trade-offs between these fitness components drive the evolution of many life-history traits in extant multicellular lineages. Here, I show that the emergence of individuality at a higher level during the uni-multicellular transition can also be a consequence of these trade-offs. I argue that germ-soma separation evolved as a means to counteract the increasing costs of larger multicellular colonies. Volvocalean green algae are uniquely suited for studying this transition since they range from unicells to undifferentiated colonies, to multicellular individuals with germ-soma separation. In these flagellated organisms, the increase in cell specialization observed as colony size increases can be explained in terms of increased motility requirements. Standard hydrodynamics is used to analyze motility in the Volvocales as colony size increases. The results of my work show that the evolution of multicellularity and germ-soma separation are the expected outcome of reducing the cost of reproduction in order to realize the benefits associated with increasing size.

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