Showing papers by "Pejman Rohani published in 2003"
TL;DR: It is shown that ecological interference is particularly strong when fatal infections permanently remove susceptibles, which has important consequences for understanding the multi-strain dynamics of pathogens such as dengue and echoviruses.
Abstract: An important issue in population biology is the dynamic interaction between pathogens. Interest has focused mainly on the indirect interaction of pathogen strains, mediated by cross immunity1,2,3,4. However, a mechanism has recently been proposed for ‘ecological interference’ between pathogens through the removal of individuals from the susceptible pool after an acute infection. To explore this possibility, we have analysed and modelled historical measles and whooping cough records. Here we show that ecological interference is particularly strong when fatal infections permanently remove susceptibles. Disease interference has substantial dynamical consequences, making multi-annual outbreaks of different infections characteristically out of phase. So, when disease prevalence is high and is associated with significant mortality, it might be impossible to understand epidemic patterns by studying pathogens in isolation. This new ecological null model has important consequences for understanding the multi-strain dynamics of pathogens such as dengue and echoviruses.
168 citations
TL;DR: Using a well-studied laboratory system, it is shown that a general rule for the dynamics of generalist natural enemies, when periodic, they exhibit single generation cycles (SGCs) similar to single species systems, is contradicted when the authors consider resource age-structure.
Abstract: The dynamical consequences of multiple-species interactions remain an elusive and fiercely debated topic. Recently, Murdoch and colleagues proposed a general rule for the dynamics of generalist natural enemies: when periodic, they exhibit single generation cycles (SGCs), similar to single species systems. This contrasts markedly with specialists, which tend to show classic (longer period) consumer–resource cycles. Using a well-studied laboratory system, we show that this general rule is contradicted when we consider resource age-structure.
17 citations
01 Jan 2003
TL;DR: In this paper, it was shown that the general rule for the dynamics of generalist natural enemies exhibits a single generation cycle (SGC) similar to single species systems, which contrasts markedly with specialists, which tend to show classic (longer period) consumer resource cycles.
Abstract: The dynamical consequences of multiple-species interactions remain an elusive and fiercely debated topic. Recently, Murdoch and colleagues proposed a general rule for the dynamics of generalist natural enemies: when periodic, they exhibit single generation cycles (SGCs), similar to single species systems. This contrasts markedly with specialists, which tend to show classic (longer period) consumer‐resource cycles. Using a wellstudied laboratory system, we show that this general rule is contradicted when we consider resource age-structure.
13 citations