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speciation_and_plasticity [2013/02/14 11:00] – [Step 2: Ecological plasticity and the evolution of reproductive isolation] mkopp | speciation_and_plasticity [2019/03/21 09:21] (current) – external edit 127.0.0.1 | ||
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===== Background and general question ===== | ===== Background and general question ===== | ||
- | * Speciation is a key topic in evolutionary biology (e.g. Coyne and Orr), and one in which mathematical modeling has for a long time played | + | * Speciation |
- | * Traditionally, | + | * The reason is that speciation |
- | * Another | + | * Here, we propose to develop mathematical models that will shed light on a topic of much recent |
- | * Plasticity | + | * A **species** is most commonly defined as a group inter-fertile individuals that cannot reproduce with members of other species (Mayr 1942). Thus, understanding speciation requires understanding the evolution of reproductive isolation. |
- | * Recently, plasticity has been advertised by some as a centerpiece of an " | + | * According to the traditional view, speciation almost always requires a geographic barrier separating the range of an ancestral species (allopatric speciation). Two independently evolving subpopulations will then diverge between the nascent species (allopatric speciation) and become more and more incompatible, |
- | * General thrust: Plasticity | + | * However, there is mounting evidence for the opposing view that speciation is also without a strict geographic barrier (parapatric or sympatric speciation). Such " |
- | * Wrt speciation, plasticity is thought to facilitate phenotypic/ | + | |
+ | * **Phenotypic plasticity** | ||
+ | * Recently, plasticity has been advertised by some as a centerpiece of an " | ||
+ | * The main argument is that plasticity | ||
+ | * In the context | ||
* However, many proposed scenarios rely on verbal models, and many details remain unclear. This is particularly true for scenarios involving plasticity in an ecological adaptation trait (but see Thibert-Plante and Hendry 2011). | * However, many proposed scenarios rely on verbal models, and many details remain unclear. This is particularly true for scenarios involving plasticity in an ecological adaptation trait (but see Thibert-Plante and Hendry 2011). | ||
* Open questions include: | * Open questions include: | ||
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* Under what conditions does plasticity facilitate or impede the evolution of reproductive isolation in the presence of gene flow? | * Under what conditions does plasticity facilitate or impede the evolution of reproductive isolation in the presence of gene flow? | ||
* If plastic traits themselves contribute to RI, what are the interactions between the evolution of environmentally and genetically induced reproductive barriers (see Fitzpatrick 2012)? | * If plastic traits themselves contribute to RI, what are the interactions between the evolution of environmentally and genetically induced reproductive barriers (see Fitzpatrick 2012)? | ||
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===== Outline of project ===== | ===== Outline of project ===== | ||