Author Archives: richard telford

About richard telford

Ecologist with interests in quantitative methods and palaeoenvironments

Odd ordination of the day

Your challenge is to identify half a dozen unexpected features in this Detrended Constrained Correspondence Analysis from Larocque-Tobler (2010). Bonus points if you can interpret the last two sentences of the caption.

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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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Pollen Spikes

Relative pollen abundance data can be difficult to interpret. If percent Pinus increases, it could be because pine trees became more common, or because other species became rarer. Pollen concentration (or ideally influx rates) can help resolve what is happening. … Continue reading

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All the pollen

“And some things that should not have been forgotten were lost. History became legend. Legend became myth. And for two and a half thousand years, the metadata passed out of all knowledge.” A couple of months ago, Eric Grimm gave … Continue reading

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Forthcoming quantitative palaeoecology PhD and Postdoc positions in Bergen

There are vacancies for a 3-year PhD position and a 3-year post-doctoral fellow position at the University of Bergen’s Department of Biology within the Ecological and Environmental Change Research Group as part of the European Research Council funded project Humans … Continue reading

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There is a memory in the dirt at the bottom of the sea

There is a memory in the dirt at the bottom of the sea. It is in the number of different sorts of small dead animals which we can use to find out how warm or cold the sea was in … Continue reading

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Abstract abstracts

So I am searching through the Web of Science for papers reporting 11 yr (Schwabe) cycles in palaeoproxy data (especially tree-rings) when I find this title, which looks promising: LUNI-SOLAR 18.6-YEAR AND SOLAR-CYCLE 10-11-YEAR SIGNALS IN CHINESE DRYNESS WETNESS INDEXES … Continue reading

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