A note on the behaviour of<i>Patina pellucida</i>in Britain and Norway

Kain, Joanna M.; Svendsen, Per

doi:10.1080/00364827.1969.10411147

Cited by 24 publications

(17 citation statements)

References 3 publications

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“…In the Isle of Man, however, it also eats cavities in the holdfast, sometimes weakening it, while in Norway it is not found below the stipe (Kain & Svendsen, 1969).…”

Section: Grazingmentioning

confidence: 94%

The biology of Laminaria hyperborea. VI. Some Norwegian populations

Kain

Jones

1971

J. Mar. Biol. Ass.

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Marine Biological Station, Port Erin, Isle of Man (Text-figs. 1-12)Laminaria hyperborea and its competitors have been observed in sites around Espegrend (near Bergen) and Tromso and compared with Isle of Man populations. In Norway conditions differ mainly in having smaller tidal ranges, a greater range of exposure to wave action and lower minimum temperatures. Surface irradiance is similar in the summer but lower in the winter while transmittance is similar in the summer but may be greater in the winter near Espegrend.Passing from highly exposed to very sheltered sites near Espegrend the upper and lower limits of L. hyperborea were raised from 5 to O m and 32 to 26 m respectively. The Alaria and L. digitata above it were correspondingly reduced. The lower part of the L. hyperborea zone became / . cucullata and this was mixed with L. saccharina. Near Tromse L. hyperborea was sparse and unsuccessful, compared with L. digitata and L. saccharina.The progressive fresh weight production by individual plants of L. hyperborea in various populations near Espegrend and the Isle of Man was calculated to be similar under a variety of conditions except at 33 m where it was low and in a strong current where it was high. In Norway the establishment of the species was possible under a wider range of conditions than in the Isle of Man. The stipe lengths in forest conditions were predominantly either short or long with few intermediates. The stipe weight/length relationship was the same under different conditions. The frond/stipe ratio was markedly different in / . hyperborea and / . cucullata, the latter having larger fronds and smaller stipes.The growth and reproduction cycle is probably similar in north Norway and the Isle of Man.

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“…In the Isle of Man, however, it also eats cavities in the holdfast, sometimes weakening it, while in Norway it is not found below the stipe (Kain & Svendsen, 1969).…”

Section: Grazingmentioning

confidence: 94%

The biology of Laminaria hyperborea. VI. Some Norwegian populations

Kain

Jones

1971

J. Mar. Biol. Ass.

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“…Two forms of the species exist; the annual 597 pellucida form is found solely on the blade, while the laevis form migrates downwards where it 598 grazes the stipe, and excavates the base of the stipe within the holdfast where it can persist for 2 599 years (Graham and Fretter, 1947;McGrath and Foley, 2005). As such, this species may cause 600 considerable mortality of host kelps due to the weakening of the holdfast (Kain and Svendsen, 1969). 601…”

Section: Biological Regulation 527mentioning

confidence: 99%

The role of kelp species as biogenic habitat formers in coastal marine ecosystems

Teagle

Hawkins

Moore

et al. 2017

Journal of Experimental Marine Biology and Ecology

437

329

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26Kelps are ecologically important primary producers and ecosystem engineers, and play a central role 27 in structuring nearshore temperate habitats. They play an important role in nutrient cycling, energy 28 capture and transfer, and provide biogenic coastal defence. Kelps also provide extensive substrata 29 for colonising organisms, ameliorate conditions for understorey assemblages, and provide three-30 dimensional habitat structure for a vast array of marine plants and animals, including a number of 31 commercially important species. Here, we review and synthesise existing knowledge on the 32 functioning of kelp species as biogenic habitat providers. We examine biodiversity patterns 33 associated with kelp holdfasts, stipes and blades, as well as the wider understorey habitat, and 34 search for generality between kelp species and biogeographic regions. Environmental factors 35 influencing biogenic habitat provision and the structure of associated assemblages are considered, 36 as are current threats to kelp-dominated ecosystems. Despite considerable variability between 37 species and regions, kelps are key habitat-forming species that support elevated levels of 38 biodiversity, diverse and abundant assemblages and facilitate trophic linkages. Enhanced 39 appreciation and better management of kelp forests are vital for ensuring sustainability of ecological 40 goods and services derived from temperate marine ecosystems. 41

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“…The epi-phytic meiofaunal assemblage is dynamic and there is evidence of both temporal and spatial partitioning amongst species (Boaden 1996, Williams 1996 that depend on the range of habitats provided by F. serratus for feeding, reproduction and avoidance of predation and adverse conditions (Alldredge & King 1980). Some species are seasonal dwellers on F. serratus plants (Kain & Svendsen 1979, Crothers 1985, while others are known to remain through all of their life history stages (Williams 1992).…”

Section: Introductionmentioning

confidence: 99%

Hyperoxic boundary layers inhabited by the epiphytic meiofauna of Fucus serratus

Irwin

Davenport²

2002

Mar. Ecol. Prog. Ser.

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Opto-chemical microsensors were used to gather information about oxygen levels close to the thallus surface of Fucus serratus L. Oxygen tensions as high as 560% air saturation were recorded at the seaweed surface in seawater under static conditions at a light intensity of 229.5 µmol photon m -2 s -1. This level of oxygen supersaturation was restricted to a thin layer directly above the seaweed surface and a steep oxygen gradient was observed through the boundary layer, which extended to a distance of 1 to 2 mm in a static water body. Although remaining considerably elevated relative to the oxygen tension in the surrounding water, oxygen tensions at the seaweed surface were reduced under flow conditions. The thickness of the oxygen-supersaturated boundary layer decreased to less than 1 mm under flow conditions. However, flow rate itself did not have a significant effect on oxygen tensions at the seaweed surface or on the depth of the boundary layer. A rapid reaction of oxygen tension within the boundary layer was observed in response to initiation or cessation of flow. In darkness, under static conditions, the oxygen tension at the seaweed surface decreased to as little as 40% air saturation. Under these conditions, oxygen tension increased through the boundary layer, reaching levels similar to the surrounding water in less than 1 mm. These data indicate that small epiphytic animals (copepods, nematodes etc.) encounter highly hyperoxic conditions during daytime, even when there is water flow over seaweed. They are therefore exposed to the possibility of hyperoxic/free radical damage, even though living in an apparently benign environment.

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A note on the behaviour ofPatina pellucidain Britain and Norway

Cited by 24 publications

References 3 publications

The biology of Laminaria hyperborea. VI. Some Norwegian populations

The biology of Laminaria hyperborea. VI. Some Norwegian populations

The role of kelp species as biogenic habitat formers in coastal marine ecosystems

Hyperoxic boundary layers inhabited by the epiphytic meiofauna of Fucus serratus

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