Tag Archives: Larocque-Tobler et al (2015)

Air temperature, lake temperature

I’m interested in lake temperatures because I want to go swimming. I’m also interested because some palaeolimnological proxies, for example chironomids, are probably most sensitive to water temperature but are calibrated against and used to reconstruct air temperature. The stronger … Continue reading

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why would anyone not trust the author????

I have already shown that ordinations of the Lake Żabińskie fossil assemblages are weirder than you ever imagined possible. Now it is time to look at figure 2 of Larocque-Tobler et al (2015) which shows an ordination of the chironomid … Continue reading

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73 lakes become 78

I have detailed many curious aspects of the remarkable Lake Żabińskie August air-temperature reconstruction by Larocque-Tobler et al (2015). This posts describes yet more – this time in Supplementary Data Figure 1 which shows a redundancy analysis (a type of … Continue reading

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The Humpty Dumpty theory of palaeoecology

“When I use a proxy,” Humpty Dumpty said, in rather a scornful tone, “it means just what I choose it to mean – neither more nor less.” “The question is,” said Alice, “whether you can make a proxy mean so … Continue reading

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Replicating the Lake Żabińskie reconstruction

Having shown that the archived chironomid data from Lake Żabińskie are strange in several ways and have bad reconstruction diagnostics, I want to see how well I can replicate the August air-temperature reconstuction. First, I need to build the transfer … Continue reading

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Low calibration set counts in LT15

Larocque-Tobler et al (2015) promised that, for their chironomid calibration set   At least 50 head capsules (Heiri et al., 2001 and Larocque et al., 2001) were mounted. A cursory examination of the data shows that this is unlikely to … Continue reading

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The missing rare taxa at Żabińskie

“rarity is the attribute of a vast number of species of all classes, in all countries.” Charles Darwin In any census of any species-rich community, the rarest taxa are likely to be represented by a single individual. This can be … Continue reading

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