Hello All, I am investigating changes in the biodiversity of British vegetation over the Holocene and to this end I am implementing DCA to analyse turnover in a Holocene pollen sequence.
I have run decorana() in vegan on my pollen dataset and extracted the sample scores from DCA1, which give a rough approximation of ecological change/turnover over the pollen sequence. I want to, however, have these results in standard deviation units, a bit like Felde <https://link.springer.com/article/10.1007/s00334-019-00726-5 <https://link.springer.com/article/10.1007/s00334-019-00726-5>> and Correa-Metrio <http://www.scielo.org.mx/pdf/bsgm/v66n1/v66n1a11.pdf <http://www.scielo.org.mx/pdf/bsgm/v66n1/v66n1a11.pdf>> have done. To achieve this, I think I need to calculate the euclidean distance between contiguous samples in terms of their ordination on the DCA rescaled ecological space, however, I can’t work out how to achieve this, i.e. ending up with SD units, myself. Any advice you may be able to provide re. this calculation would be greatly received! Best wishes, Jonny — Jonathan Gordon Leverhulme Trust Funded PhD Student Leverhulme Centre for Anthropocene Biodiversity, University of York Twitter <https://twitter.com/jonathordon> LinkedIn <https://www.linkedin.com/in/jonathan-gordon-752272142/> [[alternative HTML version deleted]] _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
