The perception that anthropogenic stressors cause jellyfish blooms is widespread within the
scientific literature and media but robust evidence in support of these claims appears scarce …

Effective monitoring of populations and communities is a prerequisite for ecosystem-based
management of marine areas. However, monitoring programs often neglect important …

Increasing anthropogenic CO 2 concentration in the atmosphere is altering sea water
carbonate chemistry with unknown biological and ecological consequences. Whereas some …

Extensive changes in plankton ecosystems around the British Isles over the last 60 years,
including production, biodiversity and species distributions, have had effects on fisheries …

Gelatinous zooplankton, including cnidarians, ctenophores, and tunicates
(appendicularians, pyrosomes, salps and doliolids), are often overlooked by scientific …

Environmental gradients have emerged as important barriers to structuring populations and
species distributions. We set out to test whether the strong salinity gradient from the marine …

Pelagic cnidarians have been observed stranding annually in the Tetouanise Sea, a site of
intense human recreation in northwest Morocco. The abundance and size of jellyfish …

Robust time-series of direct observations of jellyfish abundance are not available for many
ecosystems, leaving it difficult to determine changes in jellyfish abundance, the possible …

Abstract Max Egon Thiel's chapter on the ecology of rhizostomes in his review up to 1970
covered a bewildering variety of topics, many of which are the focus of other chapters in this …

The scyphozoan Pelagia noctiluca reproduces by direct development without a benthic
stage. Typically, this jellyfish is found offshore with a holoplanktonic lifecycle, vertical …