seananderson.bsky.social
Assistant Prof at Georgia Tech. Computational biology đ¤ field biology. Evolutionary ecology đ¤ evolutionary genetics. Thinking about how one species splits into two. https://seanasanderson.github.io/
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Iâd hope you donât leave out what relatedness means among extant species and how to read a tree
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The quarters Iâve spent at kinkoâs xerox could have bought one, perhaps two diet cokes
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And yet you never respond to mine
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Laphamâs Quarterly had a great issue on this not long ago, might find some good things in there
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The jacket is fire
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Fantastic photos
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That's cool as hell
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Brutal, Iâm sorry to hear it
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Thanks! Itâs a very cool result
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It looks from this video that the bacteria took longer to break through the first barrier (0-to-1 concentration) than the others. Is that what the study found (i.e. going from no resistance to some resistance was the rate-limiting step)?
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Really great pics, that place looks awesome
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Please read on and, as always, we welcome any feedback!
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We then highlight new empirical approaches to distinguish sorting from displacement and survey the mixed evidence to-date. We finally suggest key priorities for future research into the hypothesized role of species sorting as a generator of major biodiversity patterns.
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Via the logic of coexistence and assembly theories, we distinguish the types of allopatry-derived trait differences that will likely promote sympatry from those that likely will not, and we discuss biogeographic consequences of the latter.
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We define ecological and reproductive species sorting as analogous to ecological and reproductive character displacement, and we synthesise âdifferential fusionâ and the âTempleton effectâ within this framework.
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We consider what factors might dictate when one or both occur and how best to tell them apart with data. We also highlight similarities between displacement and sorting as well as the blurred line between them.
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We work to synthesize the two viewpoints by thinking in some depth about species sorting among speciating taxa -- a context in which traits are not fixed and speciation is not necessarily complete, a context in which both displacement and sorting are possible.
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We find that evolutionary ecology and speciation literatures typically invoke character displacement, while the community ecology literature canonically assumes that speciation & trait evolution are complete and thus invokes filtering processes like species sorting instead
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Importantly, the two processes are not mutually exclusive. Elevated trait differences in sympatry can result from displacement within pairs, sorting among pairs, or a combination of the two.
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Thus, in species sorting, elevated trait differences are a prerequisite for sympatry rather than an evolutionary response to it. Species sorting is then a pre-adaptation counterpart to character displacement.
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In both character displacement and species sorting, there are limits to ecological and/or reproductive similarity in sympatry. In character displacement, those limits drive adaptive divergence between taxa in sympatry. Under species sorting, they tend to prevent sympatry in the first place.
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A related hypothesis is that the outcome of secondary contact is non-random with respect to those traits. Pairs that, by chance, are more adequately differentiated upon secondary contact establish incipient sympatry at a higher rate. This bias is often called 'species sorting'.
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Sympatric pops or species are often more distinct in ecological or reprod've traits than those in allopatry. The earliest treatise on the pattern (Brown & Wilson '56) focused on secondary contact among speciating taxa and emphasized character displacement (including reinforcement) in sympatry
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From the wording here, it sounds like the dataset itself, not the residuals, were binomially distributed. If so, then a model with binomially distributed errors wouldnât necessarily do best?
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Congrats man!