Loading...
  • spiny
  • June 12, 2013 - In the race against climate change and ocean acidification, some sea urchins may still have a few tricks up their spiny sleeves, suggesting that adaptation will likely play a large role for the sea creatures as the carbon content of the ocean increases. (cbd.int)
  • otter
  • The intense grazing pressure exerted by urchins is an important link in a trophic cascade often observed along the west coast of North America in which sea otter predation influences urchin abundance, which in turn influences kelp devastation. (wikipedia.org)
  • Is that sea otter stealing your lunch -- or making it? (phys.org)
  • One specialist feeder on sea urchins is the sea otter. (jrank.org)
  • carbon dioxide
  • Sea urchins convert aqueous carbon dioxide using a catalytic process involving nickel into the calcium carbonate portion of the test. (wikipedia.org)
  • To observe the potential effects of future increased levels of carbon dioxide in ocean water, the researchers bred generations of purple sea urchins in conditions mimicking projected environment of the ocean in near the end of the century. (innovations-report.com)
  • Sea urchins can soak up tonnes of carbon dioxide (CO2) from the air and help in the battle against global warming, according to a new discovery. (medindia.net)
  • crabs
  • Sea urchins are also preyed upon by crabs and a wide range of fish , such as parrot fishes, which are specialized at chewing hard materials such as corals. (jrank.org)
  • Researchers
  • The researchers used the experiment to compare the proportion of invasive seaweeds in the environment and the amount actually consumed (present in sea urchin stomach contents). (phys.org)
  • To find out whether consumption by the sea urchins could control the invasion by these two species, the team of researchers placed large numbers of sea urchins into cages (12 sea urchins/m2) and monitored how the invasive seaweeds developed. (phys.org)
  • Researchers at the University of Gothenburg have shown that sea urchins see with their entire body despite having no eyes at all. (phys.org)
  • Researchers extracted the urchins' mouthpieces, scanned them and analyzed the structures at school of medicine at UC San Diego. (i4u.com)
  • The researchers decided to investigate whether the newcomer worms were eating sea urchins-somehow. (discovermagazine.com)
  • barren
  • An urchin barren is an area of the subtidal where the population growth of sea urchins has gone unchecked, causing destructive grazing of kelp beds or kelp forests (specifically the giant brown bladder kelp, Macrocystis). (wikipedia.org)
  • There is a theory that both sea urchin barrens and kelp-beds represent alternative stable states, meaning that an ecosystem can exist under multiple states, each with a set of unique biotic and abiotic conditions (i.e. barren except for urchins or flourishing with kelp). (wikipedia.org)
  • rocky
  • These diverse ecosystem effects of red urchins highlight their importance as ecosystem engineers in temperate rocky reef ecosystems. (wikipedia.org)
  • However, the sea provides a more turbulent environment when it encounters a rocky reef. (redorbit.com)
  • cages
  • The sea urchins only controlled the expansion of C. racemosa in the cages in places where the invasion was still at a very early stage", Cebrián points out. (phys.org)
  • spine
  • For years, scientists have been interested in the chemical composition of the sea urchin spine, but there has been no investigation of how they respond to mechanical stress. (redorbit.com)
  • The spine is both strong and lightweight, and has mechanical characteristics that suit the sea urchin´s needs. (redorbit.com)
  • despite
  • Despite their apparently formidable suit of armor, sea urchins are frequently eaten by seabirds, many of which drop the urchins from a height to break the hard outer test. (jrank.org)
  • populations
  • It is a key interaction between the two principal populations of mesodermal cells in the sea urchin embryo, PMCs and secondary mesenchyme cells (SMCs), that regulates SMC fates and the process of skeletogenesis. (wikipedia.org)
  • The movement of bearded fireworms into the Italian coasts could reduce sea urchin populations and upset the balance between ecosystem types. (discovermagazine.com)
  • underside
  • I stood in the foyer where, under the confused stares of a bartender and bellhop, I plunged a butter knife into the orifice on the underside of the sea urchin. (seriouseats.com)
  • In these urchins, the upper surface of the body is slightly domed, but the underside is flat, while the sides are devoid of tube feet. (wikipedia.org)
  • undergo
  • Skeletogenesis begins in the early sea urchin blastula (9-10 hours post fertilization) when the primary mesenchyme cells (PMCs), the sole descendants of the large micromere daughter cells, undergo an epithelial-mesenchymal transition (EMT) and break away from the apical layer, thus entering the blastocoel, forming a cell cluster at the vegetal pole. (wikipedia.org)
  • Wild sea urchins are today harvested in the sea by divers and undergo raw enhancement before they are sold. (nofima.no)
  • spherical
  • This is most apparent in the "regular" sea urchins, which have roughly spherical bodies with five equally sized parts radiating out from their central axes. (wikipedia.org)