Category Archives: Uncategorized

OxCal and R

OxCal is perhaps the most powerful of the three main Bayesian age-depth modelling procedures, with many many options and the potential for building far more complicated than your typical palaeolimnologist needs to use. Unlike Bchron and Bacon, OxCal is not … Continue reading

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There is no scientific misconduct …

The youngest patient was two years old when she died three months after Professor Paolo Macchiarini’s experimental surgery to replace her trachea. Since then, Macchiarini has been accused of scientific malpractice. An external investigation found that he reported in a … Continue reading

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Czarny Staw Gąsienicowy

Whenever I see a lake, especially one as beautiful as Czarny Staw Gąsienicowy in the High Tatras, I wonder about what hypotheses could be tested with a sediment core. The lake, in a glacial cirque 1624 m a.s.l., is 51 … Continue reading

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A comment on Lyons et al is published

Alas it is not the comment that I helped write. But hopefully that will be published soon. To recap, Lyons et al (2016)  report that that the proportion of species pairs that are aggregated (i.e. co-occur) rather than segregated began … Continue reading

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Nei, de er ikke geiter

I knew they were not ibex or ibis, so I assumed they were goats, high (at least it felt high) in the Tatra Mountains. Later I was asked if I had seen any chamois. No. But I I had seen… … Continue reading

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Mountain detour on the way to Białowieża

I am on my way to Białowieża Forest in eastern Poland to meet with collaborators on the KlimaVeg project and start analysing some of the project data. I have taken a detour to the Tatra Mountains, a compact calcareous range … 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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Skiing before breakfast

Because I can. This week I’m attending a workshop on measuring resilience, resistance, sensitivity, recovery rates in the palaeoecological record at the Finse Research Station.

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