Scott Collins, the president of the Ecological Society of America, announced today on Twitter that all ESA journals will now consider papers for publication that have previously been posted on preprint servers like arXiv. We look forward to discussing preprints headed to ESA journals here on Haldane’s Sieve.
[Update] See also here.
Haldane's Sieve 
Very glad to see this policy change. Way to go ESA!