Abstract
This study was designed to investigate spatial and temporal variation in Gelidium canariensis populations at two shores in northern Gran Canaria during two years. Spatial scales ranged from some hundred meters (distance between shores), 10 to 30 m (distance between plots) to less than 3 m (distance between quadrats). Gelidium individuals were defined as distinct Gelidium clumps. The results show a significant difference in size of clumps between shores, but not on the smaller spatial scales. No significant temporal variation was found. There was no significant temporal or spatial variation in standing crop or density (counts made in quadrats where Gelidium was present, rather than counts for the total shore). Sporophytic and gametophytic clumps were also distinguished by identifying reproductive structures in the field. The total proportion of sporophytes was larger than the proportion of gametophytes, but at a smaller scale there could be a shift in dominance. The survival rate of clumps was similar between shores with a mean survival rate of 85%, but there was a significant difference in recruitment between shores. The results indicate a stable population structure.
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References
Åberg P (1989) Distinguishing between genetic individuals in Ascophyllum nodosumpopulations on the Swedish west coast. Br. phycol. J. 24: 183-190.
Åberg P (1990) Measuring size and choosing category size for a transition matrix study of the seaweed Ascophyllum nodosum. Mar. Ecol. Progr. Ser. 63: 281-287.
Åberg P, Pavia H (1997) Temporal and multiple scale spatial variation in juvenile and adult abundance of the brown alga Ascophyllum nodosum. Mar. Ecol. Progr. Ser. 158: 111-119.
Betancort-Villalba MJ, Gonzalez-Henriquez MN (1991) Estudio preliminar sobre la biologia de las poblaciones de Gelidium canariensis(Grunow) Seoane en Gran Canaria. Acta Botanica Malacitana 16: 51-58.
Bhattacharya D (1985) The demography of fronds of Chondrus crispusStackhouse. J. exp. mar. Biol. Ecol. 91: 217-231.
De Wreede RE, Green LG (1990) Patterns of gemetophyte dominance of Iridaea splendens(Rhodophyta) in Vancouver Harbour, Vancouver, British Columbia, Canada. J. appl. Phycol. 2: 27-34.
Harper JL (1977) Population Biology of Plants. Academic Press, London: 892 pp. Kays S, Harper JL (1974) The regulation of plant and tiller density in a grass sward. J. Ecol. 62: 97-105.
Kays S, Harper JL (1974) The regulation of plant and tiller density in grass sward. J. Ecol. 62: 97-105.
Lazo ML, Greenwell M, McLachlan J (1989) Population structure of Chondrus crispusStackhouse (Gigartinaceae, Rhodophyta) along the coast of Prince Edward Island, Canada: distribution of gametophytic and sporophytic fronds. J. exp. mar. Biol. Ecol. 12: 45-58.
Lindegardh M, André C, Jonsson PR (1995) Analysis of the spatial variability in abundance and age structure of two infaunal bivalves, Cerastoderma eduleand C. lamarcki, using hierarchical sampling programs. Mar. Ecol. Progr. Ser. 116: 85-97.
Lindgren A, Åberg P (1996) Proportion of life cycle stages of Chondrus crispusand its population structure: a comparison between a marine and an estuarine environment. Bot. mar. 39: 263-268.
May G (1986) Life history variations in a predominantly gametophytic population of Iridaea cordata(Gigartinaceae, Rhodophyta). J. Phycol. 22: 448-455.
Santelices B (1988) Synopsis of biological data on the seaweed genera Gelidiumand Pterocladia(Rhodophyta) FAO Fisheries Synopsis 145.
Santelices B (1990) Patterns of reproduction, dispersal and recruitment in seaweeds. Oceanogr. Mar. Biol. Annu. Rev. 28: 177-276.
Santos R (1994) Frond dynamics of the commercial seaweed Gelidium sesquipedale: effects of size and of frond history. Mar. Ecol. Progr. Ser. 107: 295-305.
Santos R, Duarte P (1996) Fecundity, spore recruitment and size in Gelidium sesquipedale(Gelidiales, Rhodophyta). Hydrobiologia 326/327: 223-228.
Sosa PA, Garcia-Reina G (1993) Genetic variability of Gelidium canariensis(Rhodophyta) determined by isozyme electrophoresis. J. Phycol. 29: 118-124.
Underwood AJ (1997) Experiments in Ecology: Their Logical Design and Interpretation Using Analysis of Variance. Cambridge University Press, Cambridge, 504 pp.
Winer BJ, Brown DR, Michels KM (1991) Statistical Principles in Experimental Design. McGraw-Hill, New York, 1057 pp.
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Lindgren, A., Bouza, N., Åberg, P. et al. Spatial and temporal variation in distribution of Gelidium canariensis (Rhodophyta) from natural populations of the Canary Islands. Journal of Applied Phycology 10, 273–278 (1998). https://doi.org/10.1023/A:1008065810904
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DOI: https://doi.org/10.1023/A:1008065810904