I’ve just gone through and put some new papers into my Research page. I’ve been busy over the past little while and it seems to be paying off. Here are some of my latest papers, with brief summaries for your enjoyment:
- Although pollen richness has acted as a proxy for vegetation richness in the literature, our paper shows that this may not be the case. Taphonomic processes, from release of the pollen to deposition and preservation in lake sediments, appear to degrade the signal of plant richness to the point that there is no significant relationship between plant species richness and pollen taxonomic richness. The supplementary material includes all the R code and a sample of the raw data (we could not freely share some of the data) used to perform the analysis.
Combourieu-Nebout N, Peyron O, Bout-Roumazeilles V, Goring S, Dormoy I, Joannin S, Sadori L, Siani G, and Magny M. 2013. Holocene vegetation and climate changes in central Mediterranean inferred from a high-resolution marine pollen record (Adriatic Sea). Climate of the Past Discussions, 9:1969-2014. [Link]
- Another great paper on Holocene and late-Glacial change in the Mediterranean, part of a Special Series in Climate of the Past. This paper uses multiple proxies, including the use of clay mineral fractions to match climate signals from pollen to sediment transport into the Adriatic from the Po River watershed, sediment blown from the Sahara and sediment transported down the Apennines. This paper further examines shifts in seasonal precipitation in the central Mediterranean associated with changes in insolation during the Holocene and broader scale shifts in the relative influences of major climate systems in the region.
Gill JL, McLauchlan KK, Skibbe AM, Goring S, Williams JW. Linking abundances of the dung fungus Sporormiella to the density of Plains bison: Implications for assessing grazing by megaherbivores in the paleorecord. Journal of Ecology. Early view: [Link]
- Three great papers in a row! This paper uses modern pollen traps in the Konza Prairie LTER to examine the relationship between Sporormiella pollen and bison grazing. This is an important link to make because Sporormiella has been used to indicate the presence of megafauna such as mammoths and mastadons in the late-glacial. The declining signal of Sporormiella at Appleman Lake, IN was a key feature in the onset of non-analogue vegetation at the site in the late-Glacial (Gill et al., 2009). This paper provides an explicit link between the theoretical potential of the spore as an indicator of megafaunal presence and the degree of grazing at sites.