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A note on the population genetic consequences of delayed larval development in insects Genet. Mol. Biol.
Salles,Marcos Mattoso de; Otto,Paulo A..
Observations by Dobzhansky's group in the 1940s suggesting that the presence of recessive genotypes could account for lower larval developmental rates in Drosophila melanogaster were not confirmed at the time and all subsequent investigations on this subject focused on the analysis of ecological models based on competition among pre-adult individuals. However, a paper published in this journal in 1991 eventually confirmed the finding made by Dobzhansky and his co-workers. In this report, we provide a theoretical analysis of the population genetic effects of a delay in the rate of larval development produced by such a genetic mechanism.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Difference and differential equations; Drosophila; Dynamic systems; Larval development; Population genetics.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300019
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Robustness, vulnerability, and adaptive capacity in small-scale social-ecological systems: The Pumpa Irrigation System in Nepal Ecology and Society
Cifdaloz, Oguzhan; ASU School of Human Evolution and Social Change; Ogu@asu.edu; Regmi, Ashok; ASU School of Human Evolution and Social Change; Ashok.Regmi@gmail.com; Anderies, John M; ASU School of Human Evolution and Social Change; School of Sustainability; m.anderies@asu.edu; Rodriguez, Armando A; Intelligent Embedded Systems Laboratory (IeSL), ASU Fulton School of Engineering; aar@asu.edu.
Change in freshwater availability is arguably one of the most pressing issues associated with global change. Agriculture, which uses roughly 70% of the total global freshwater supply, figures prominently among sectors that may be adversely affected by global change. Of specific concern are small-scale agricultural systems that make up nearly 90% of all farming systems and generate 40% of agricultural output worldwide. These systems are experiencing a range of novel shocks, including increased variability in precipitation and competing demands for water and labor that challenge their capacity to maintain agricultural output. This paper employs a robustness-vulnerability trade-off framework to explore the capacity of these small-scale systems to cope...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive capacity; Agriculture; Dynamic systems; Food security; Freshwater availability; Global change; Small-scale irrigation systems; Mathematical model; Nepal; Robustness; Social-ecological systems; Vulnerability.
Ano: 2010
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The Cost of Restoration as a Way of Defining Resilience: a Viability Approach Applied to a Model of Lake Eutrophication Ecology and Society
Martin, Sophie; Cemagref; sophie.martin@cemagref.fr.
Multiple stable states or alternative equilibria in ecological systems have been recognized since the 1960s in the ecological literature. Very often, the shift between alternative states occurs suddenly and the resource flows from these systems are modified. Resilience is the capacity of a system to undergo disturbance and maintain its functions and controls. It has multiple levels of meaning, from the metaphorical to the specific. However, most studies that explore resilience-related ideas have used resilience as a metaphor or theoretical construct. In a few cases, it has been defined operationally in the context of a model of a particular system. In this paper, resilience is defined consistently with the theoretical uses of the term, in the context of...
Tipo: Peer-Reviewed Reports Palavras-chave: Dynamic systems; Ecosystem models; Eutrophication; Lake ecosystem; Resilience; Time of crisis.
Ano: 2004
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