Ocean Acidification

Attrill et al. (2007) in their paper ‘‘Climate-related increases in jellyfish frequency suggest a more gelatinous future for the North Sea’’ present data showing the occurrence of nematocysts in continuous plankton recorder (CPR) samples collected over more than 40 yr. They suggest that, contrary to previous work examining a shorter period (Lynam et al. 2004), cnidarian nematocysts ‘‘most likely to be from scyphozoans’’ have increased, especially since the mid- 1980s. However, several problems with their analyses make it difficult to evaluate their conclusions.



Haddock S. H. D. Reconsidering evidence for potential climate-related increases in jellyfish. Limnology and Oceanography 53(6): 2759–2762. Article.