Author Archives: richard telford

About richard telford

Ecologist with interests in quantitative methods and palaeoenvironments

Chironomid vs pollen: Holocene climate change in southern Europe

Pollen-inferred summer temperature reconstruction from southern Europe show a cool early Holocene summers and a warmer late Holocene summer (Davis et al 2003, Mauri et al 2015). In contrast,  warm early Holocene summers are reconstructed elsewhere in Europe and most … Continue reading

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Resilience workshop in Finse: deadline soon

At the end of March, there is a workshop on Measuring Components of Resilience in Long-term Ecological Datasets The workshop is at Finse, high in the mountains between Bergen and Oslo. Along with debate about how ecosystem resilience can estimated … Continue reading

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2016 in numbers

Highest temperature: 120 °C At least that is what the (possibly broken) thermometer in the wood-fired sauna near Tallinn read when I was taken there and beaten with a viht by PhD students Annika and Agata. After a quick plunge … Continue reading

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Performance of chironomid-temperature transfer functions

Chrironomid (non-biting midges) are sensitive to temperature (Eggermont and Heiri 2011), and because their head-capsules preserve well in lake sediments, their fossil assemblages can be use to reconstruct past temperature with a transfer function trained on the chironomid-temperature relationship in … 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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The breakpoint is broken and other tales from the comment on Lyons et al

A few weeks ago, Nature finally published the comment I wrote with colleagues on Lyons et al (2016). In this post, I explore some of the details that did not fit into the constraints of a 1200 word comment, and … Continue reading

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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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