PERSPECTIVE: MODELS OF SPECIATION: WHAT HAVE WE LEARNED IN 40 YEARS?
نویسندگان
چکیده
منابع مشابه
Perspective: models of speciation: what have we learned in 40 years?
Theoretical studies of speciation have been dominated by numerical simulations aiming to demonstrate that speciation in a certain scenario may occur. What is needed now is a shift in focus to identifying more general rules and patterns in the dynamics of speciation. The crucial step in achieving this goal is the development of simple and general dynamical models that can be studied not only num...
متن کاملWhat we have also learned: adaptive speciation is theoretically plausible.
A recent Perspectives article by Gavrilets (2003) on the theory of speciation ignored advances in understanding processes of adaptive speciation, in which the splitting of lineages is an adaptation caused by frequency-dependent selection. Adaptive, or sympatric, speciation has been modeled since the 1960s, but the large amount of attention from both empirical and theoretical biologists that ada...
متن کاملWhat Have We Learned?
FIVE YEARS AFTER THE INSTITUTE of Medicine (IOM) reported that as many as 98 000 people die annually as the result of medical errors and called for a national effort to make health care safe, it is time to assess our progress. Is health care safer now? And, if not, why not? The IOM’s report, To Err Is Human: Building a Safer Health System, galvanized a dramatically expanded level of conversatio...
متن کاملWhat Have We Learned from 40 Years of Supporting Research and Capacity Building?
From the beginning of the 20th century, the industrialized ‘‘North’’ made incredible improvements in public health that reduced the threat of infectious diseases and increased overall health. Unfortunately, this was not the case in many other countries [1]. By the 1970s, major diseasecontrol initiatives in lowand middleincome countries, which were driven vertically by donors, were having mixed ...
متن کاملPathophysiology of Ischemia/Reperfusion-induced Myocardial Injury: What We Have Learned From Preconditioning and Postconditioning?
Organ damage after reperfusion of previously viable ischemic tissues is defined as ischemia/reperfusion injury. The pathophysiology of ischemia/reperfusion injury involves cellular effect of ischemia, reactive oxygen species and inflammatory cascade. Protection against ischemia/reperfusion injury may be achieved by preconditioning or postconditioning. In this review, we discuss basic mechan...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Evolution
سال: 2003
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.0014-3820.2003.tb00233.x