L773:0171 8630
Sökning: L773:0171 8630 > (2005-2009) > Small-scale disturb...
- Cervin, Gunnar,1967Gothenburg University,Göteborgs universitet,Institutionen för marin ekologi,Department of Marine Ecology (författare)
Small-scale disturbance in a stable canopy dominated community: implications for macroalgal recruitment and growth
- Artikel/kapitelEngelska2005
Förlag, utgivningsår, omfång ...
- 2005
Nummerbeteckningar
- LIBRIS-ID:oai:gup.ub.gu.se/59248
- https://gup.ub.gu.se/publication/59248URI
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- Språk:engelska
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- SwePubSwePub
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- The long-living species Ascophyllum nodosum dominates the mid-shore of sheltered rocky sites in NW Europe, forming near-monospecific stands. We aimed to determine the effects of small-scale disturbance on such shores, through manipulative experiments over a long period (almost 7 yr). We tested the general hypothesis that small-scale disturbance allows co-existence of Fucus canopy (F. vesiculosus, F serratus) and promotes recruitment of Ascophyllum itself. Two factorial experiments were established to determine the interactive effects of the Ascophyllum canopy with: (1) the red algal turf which covers approximately 90% of the substratum at the experimental sites, and (2) the dominant grazer, the limpet Patella vulgata, which maintains small patches of open substratum free from turf. Disturbance to plots 25 x 25 cm resulted in significant changes to the understorey community. Removal of limpets led to high levels of Ascophyllum and Fucus recruitment, irrespective of the presence of the canopy. In the presence of limpets recruitment of fucoids was negligible. In contrast, removal of turf alone led to high Fucus spp. but not Ascophyllum recruitment. Loss of the canopy and a consequent degradation of the turf was required to promote Ascophyllum recruitment. Despite high recruitment in some treatments beneath an intact canopy, low growth rates in shade prevented development of mature plants. Loss of the overlying Ascophyllum canopy was followed by development of a mixed F serratus/F. vesiculosus canopy that was still present nearly 7 yr after manipulation. Ascophyllum recruits, while showing enhanced growth in the absence of the canopy, were too slow-growing to form a canopy.
Ämnesord och genrebeteckningar
- NATURVETENSKAP Biologi Ekologi hsv//swe
- NATURAL SCIENCES Biological Sciences Ecology hsv//eng
- NATURVETENSKAP Biologi hsv//swe
- NATURAL SCIENCES Biological Sciences hsv//eng
- Ascophyllum nodosum
- Fucus spp.
- canopy disturbance
- recruitment
- interspecific competition
- rocky shores
- SEAWEED ASCOPHYLLUM-NODOSUM
- SUBSTRATUM TYPE
- INTERTIDAL COMMUNITY
- SPATIAL VARIATION
- ALGAL ASSEMBLAGE
- KELP FOREST
- SHORE
- MAINE
- ZONE
- POPULATIONS
Biuppslag (personer, institutioner, konferenser, titlar ...)
- Åberg, Per,1959Gothenburg University,Göteborgs universitet,Institutionen för marin ekologi,Department of Marine Ecology(Swepub:gu)xabepe (författare)
- Jenkins, S. R. (författare)
- Göteborgs universitetInstitutionen för marin ekologi (creator_code:org_t)
Sammanhörande titlar
- Ingår i:Marine Ecology-Progress Series305, s. 31-400171-8630
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- Cervin, Gunnar, ...
- Åberg, Per, 1959
- Jenkins, S. R.
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