Community- and population-level changes in diatom size structure in a subarctic lake over the last two centuries.

ABSTRACT: Climate change over the last two centuries has been associated with significant shifts in diatom community structure in lakes from the high arctic to temperate latitudes. To test the hypotheses that recent climate warming selects for species of smaller size within communities and a decrease in the average size of species within populations, we quantified the size of individual diatom valves from 10 depths in a sediment core covering the last ∼200 years from a pristine subarctic lake. Over the last ∼200 years, changes in the relative abundance of species of different average size and changes in the average valve size of populations of species contribute equally to the changes in community size structure, but are often opposite in sign, compensating for one another and moderating temporal ch

SUBMITTER: Kerrigan EA 

PROVIDER: S-EPMC4493642 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature