Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Temporal variation in the abundance of the 15 species that are present in every year of the time series; (b) rank abundance plot where values for first-ranked species disregarding species identity, second-ranked species, third-ranked species, etc. have been averaged across the time series. Grey bars show the 95% confidence limits around these mean values.
