Plastic Variation in the Phyletic Lineages of Cactophilic Drosophila meridionalis and Relation to Hosts as Potential for Diversification

2021 ◽  
Author(s):  
Dora Yovana Barrios-Leal ◽  
Rogério P. Mateus ◽  
Cintia Graziela Santos ◽  
Maura Helena Manfrin
Keyword(s):  
Cactophilic Drosophila

Specialization and performance trade‐offs across hosts in cactophilic Drosophila species

2021 ◽  
Author(s):  
Santiago Bouzas ◽  
María F. Barbarich ◽  
Eduardo M. Soto ◽  
Julián Padró ◽  
Valeria P. Carreira ◽  
...  
Keyword(s):  
Drosophila Species ◽  
Cactophilic Drosophila ◽  
Trade Offs ◽  
And Performance

A holocenic and dynamic hybrid zone between two cactophilic Drosophila species in a coastal lowland plain of the Brazilian Atlantic Forest

2021 ◽  
Author(s):  
Dora Yovana Barrios‐Leal ◽  
Rodolpho S. T. Menezes ◽  
João Victor Ribeiro ◽  
Luiz Bizzo ◽  
Fabio Melo de Sene ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Hybrid Zone ◽  
Drosophila Species ◽  
Brazilian Atlantic Forest ◽  
Cactophilic Drosophila ◽  
Coastal Lowland ◽  
Dynamic Hybrid

Evolution of water balance in the genusDrosophila

2001 ◽  
Vol 204 (13) ◽  
pp. 2331-2338 ◽  
Author(s):  
Allen G. Gibbs ◽  
Luciano M. Matzkin
Keyword(s):  
Water Balance ◽  
Water Loss ◽  
The Body ◽  
The Other ◽  
Arid Environments ◽  
Physiological Mechanisms ◽  
Dehydration Tolerance ◽  
Cactophilic Drosophila ◽  
Adaptive Mechanisms ◽  
The World

SUMMARYFruit flies of the genus Drosophila have independently invaded deserts around the world on numerous occasions. To understand the physiological mechanisms allowing these small organisms to survive and thrive in arid environments, we performed a phylogenetic analysis of water balance in Drosophila species from different habitats. Desert (cactophilic) species were more resistant to desiccation than mesic ones. This resistance could be accomplished in three ways: by increasing the amount of water in the body, by reducing rates of water loss or by tolerating the loss of a greater percentage of body water (dehydration tolerance). Cactophilic Drosophila lost water less rapidly and appeared to be more tolerant of low water content, although males actually contained less water than their mesic congeners. However, when the phylogenetic relationships between the species were taken into account, greater dehydration tolerance was not correlated with increased desiccation resistance. Therefore, only one of the three expected adaptive mechanisms, lower rates of water loss, has actually evolved in desert Drosophila, and the other apparently adaptive difference between arid and mesic species (increased dehydration tolerance) instead reflects phylogenetic history.

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