The Intertidal Ecology of Some Localities on the Atlantic Coast of France

Evans, Ronald G.

doi:10.2307/2257088

Cited by 23 publications

(10 citation statements)

References 19 publications

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“…The work of the Stephensons also served to direct attention away from tides and tidal levels, with which many ecologists of the day were preoccupied (Colman, 1933;Doty, 1946;Evans, 1957). Even in more recent textbooks on shore ecology a disproportionate amount of space is sometimes devoted to defining the terminology of the many levels on the shore that the tide reaches throughout the year.…”

Section: Universal Zonation Schemes For Rocky Shoresmentioning

confidence: 99%

Intertidal Ecology

Raffaelli¹,

Hawkins²

1996

339

253

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Section: Universal Zonation Schemes For Rocky Shoresmentioning

confidence: 99%

Intertidal Ecology

Raffaelli¹,

Hawkins²

1996

339

253

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“…Competition might therefore be involved, and the abundance or restriction of P. vulgata to tidal levels largely above these two species in south-western France (Evans, 1957) and on the north coast of Spain (Fischer-Piette & Gaillard, 1959) appear to support this. But an increasing effect of heat or desiccation towards the south is also implicit in the species' increasing depression to low tide levels and avoidance of a southerly aspect along the west coast of Spain and Portugal (Fischer-Piette & Gaillard, !959)-Even on the north coast of Spain one of us (J.R.L.)…”

Section: Recruitment Fluctuations and Geographical Distributionmentioning

confidence: 99%

Annual fluctuations in the recruitment of Patella vulgata L.

Bowman

Lewis

1977

J. Mar. Biol. Ass.

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Fluctuations in the annual recruitment of Patella vulgata at Robin Hood's Bay over 7 years have been analysed in relation to annual variations in gonad cycles and environmental conditions. Evidence to date suggests that short periods of low air temperatures during the first few weeks after settlement of spat in the late autumn exert the greatest influence upon the level of recruitment. Not only are the time and severity of autumnal frosts highly variable from one year to another, but gonad ripening and first spawning, determined respectively by summer temperatures and rough seas, can also vary independently by up to 7 weeks. Although an early reproductive season is more likely than not to lead to successful recruitment, success or failure appears to depend less upon the time of spawning than on the chance occurrence of frost within 4-5 weeks of this variable event. Thereafter the severity of mid-winter conditions appears to be irrelevant.Regional data from the northern half of the British Isles are less detailed than those from Robin Hood's Bay, especially about the exact spawningtime in some areas. Nevertheless there has been no instance of poor recruitment that does not appear to accord with a frost-control hypothesis. Continuing work in these areas suggests that lack of spawning synchrony and a tendency to re-ripen could complicate future interpretation.In sub-habitats where limpet life-spans are long, several years of above-average recruitment at Robin Hood's Bay have resulted in high adult densities persisting during years of poor recruitment. Where longevity is less, the adult densities respond more closely or irregularly to recruitment fluctuations.On the basis of the frost-controlled fluctuations, of preliminary data on gonad cycles in northern Norway and Portugal, and on the local distribution towards the species' southern limit in Portugal it is tentatively suggested that geographical limits are set, to the north, by spat intolerance of low temperature and, to the south, by inability of juveniles to withstand heat/desiccation during their first summer after settlement. I N T R O D U C T I O NIn an attempt to identify the causes of the natural population fluctuations on British rocky coasts, an exploratory programme on the recruitment fluctuations of certain 'key species' has been operating for several years. The choice of species and the emphasis upon their recruitment have been discussed elsewhere (Lewis, 1976) and were justified as the most economical means of gaining the ability to (a) 'explain' major changes in the general character of rocky shore communities, and (b) make predictions about natural events against which to detect regional or temporal consequences of man-made changes in water quality. Mussels, barnacles and limpets are being studied but it is the last with which most interpretative progress appears to have been made, and this paper is concerned solely with Patella vulgata L. It is, however, essentially a preliminary report in a continuing study and it illustrates the practical and int...

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“…Dieser beschreibt den Prozentsatz der in zwei zu vergleichenden Proben gemeinsam verkommenden Arten: Is = (2NAB/NA + Ns)100. (Crisp & Southward, 1958;Evans, 1957;, den franz6sischen Kanalk(isten (Evans, 1957) und Norwegen (Brattegard, 1966) . …”

Section: Qualitative )~Hnlichkeitsanalyseunclassified

Die Makrofauna und ihre Verteilung im Nordost-Felswatt von Helgoland

Janke

1986

Helgolander Meeresunters

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Macrofauna and its distribution in the northeastern rocky intertidal zone of the island of Helgoland. The macrofauna and its distribution in the sheltered, rocky intertidal zone of Helgoland (North Sea) was studied at 9 vertically and/or morphologically different stations from March to September in 1984. Seasonal variations in the communities were described based on each species' "conspicuousness". A total of 172 species was found. The macrofauna shows a zoned pattern, but also the different substrata, for example, affect its distribution. The number of species increases from the upper intertidal to the upper subhttoral zone from 23 to 133 species. The upper intertidal is characterized by Littonna saxatilis, Chaetogammarus marinus and Hyale nilssonii. Typical and abundant species of the middle and lower intertidal are Flustrellidra hispida, Littorina mariae/obtusata, Littorina Iittorea, Mytilus edutis and Spirorbis spirorbis. The upper sublittorat zone is characterized by Gibbula cineraria and increasing species numbers of Bryozoa, Nemertini and Opisthobranchia. Only few species (e.g. Dynamena pumila, Laomedea flexuosa, Polydora ciliata, Pabricia sabella, Jaera albifrons, Carcinus maenas) occur in the entire intertidal zone. In comparison to other very sheltered shores in Great Britain, which are also dominated by Fucaceae, the macrofauna in the Helgoland intertidal zone lacks several littoral species, such as Patella spp., Monodonta lineata, Gibbula umbilicalis, Littorina neritoides, Chthamalus spp., whereas Littorina littorea and Cibbula cineraria are highly abundant. EINLEITUNG

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The Intertidal Ecology of Some Localities on the Atlantic Coast of France

Cited by 23 publications

References 19 publications

Intertidal Ecology

Intertidal Ecology

Annual fluctuations in the recruitment of Patella vulgata L.

Die Makrofauna und ihre Verteilung im Nordost-Felswatt von Helgoland

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