Research Publications: UM-SG-RS-2013-11


Environmental and historical imprints on beta diversity: insights from variation in rates of species turnover along gradients.




Fitzpatrick, MC; Sanders, NJ; Normand, S; Svenning, JC; Ferrier, S; Gove, AD; Dunn, RR


Proceedings of the Royal Society B-Biological Sciences
280 ( 1768 )




A common approach for analysing geographical variation in biodiversity involves using linear models to determine the rate at which species similarity declines with geographical or environmental distance and comparing this rate among regions, taxa or communities. Implicit in this approach are weakly justified assumptions that the rate of species turnover remains constant along gradients and that this rate can therefore serve as a means to compare ecological systems. We use generalized dissimilarity modelling, a novel method that accommodates variation in rates of species turnover along gradients and between different gradients, to compare environmental and spatial controls on the floras of two regions with contrasting evolutionary and climatic histories: southwest Australia and northern Europe. We find stronger signals of climate history in the northern European flora and demonstrate that variation in rates of species turnover is persistent across regions, taxa and different gradients. Such variation may represent an important but often overlooked component of biodiversity that complicates comparisons of distance-decay relationships and underscores the importance of using methods that accommodate the curvilinear relationships expected when modelling beta diversity. Determining how rates of species turnover vary along and between gradients is relevant to understanding the sensitivity of ecological systems to environmental change.

Related Research Project(s) Funded by Maryland Sea Grant:

Maryland Sea Grant Topic(s):

'Related Research Project(s)' link to details about research projects funded by Maryland Sea Grant that led to this publication. These details may include other impacts and accomplishments resulting from the research.

'Maryland Sea Grant Topic(s)' links to related pages on the Maryland Sea Grant website.

The Blue Crab: Callinectes Sapidus

An essential resource for researchers, students, and managers.  Get your copy today!

pile of cooked crabs

5825 University Research Court, Suite 1350 | College Park, MD 20740 | Phone: (301) 405-7500 | Fax: (301) 314-5780 | Contact Us

  • Twitter
  • Facebook
  • YouTube
  • Flickr
  • RSS