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Bull kelp is a common name for the brown alga Nereocystis luetkeana which is a true kelp in the family Laminariaceae. Species in the genus Durvillaea are also sometimes called "bull kelp", but this is just a shortening of the common name southern bull kelp .
Nereocystis (Greek, 'mermaid's bladder') is a monotypic genus of subtidal kelp containing the species Nereocystis luetkeana. [1] Some English names include edible kelp, bull kelp, bullwhip kelp, ribbon kelp, bladder wrack, and variations of these names. [2]
Just one example is the giant bull kelp Nereocystis luetkeana, which have evolved to change blade shape in order to increase drag in water and interception of light when exposed to certain environments. Bull kelp are not unique in this adaptation; many kelp species have evolved a genetic plasticity for blade shapes for different water flow ...
A substantial die off of Durvillaea bull kelp occurred along the Kaikōura coastline following the 2016 Kaikōura earthquake, which caused uplift up to 6 metres. [17] [4] [43] [44] [45] The loss of Durvillaea kelp caused ecological disturbance, significantly affecting the biodiversity of the local intertidal community.
Durvillaea antarctica, also known as cochayuyo and rimurapa, [1] is a large, robust species of southern bull kelp found on the coasts of Chile, southern New Zealand, and Macquarie Island.
The species can be confused with Durvillaea amatheiae, which has an overlapping geographic distribution. [1] [2] D. potatorum has a shorter, wider stipe with more limited lateral blade development, whereas D. amatheiae has a shorter, narrow stipe and typically prolific lateral blade development.
This species is chocolate brown in colour and is darker than all other bull kelp species. [4] [5] It has a branched stipe. [3] The species is non-buoyant and does not have 'honeycomb' in its fronds. [3] [4] The holdfast becomes large and spreads like a plate on rocky substrates. [6]
Durvillaea incurvata is a large, robust species of southern bull kelp endemic to Chile. Description. Durvillaea incurvata has unbranched stipes, ...