Advertisement

Oecologia

, Volume 92, Issue 3, pp 450–456 | Cite as

Size-specific reproductive parameters in red algae: a comparative analysis for two sympatric species from Central Chile

  • Patricio A. Camus
Original Papers
  • 42 Downloads

Abstract

Ahnfeltia durvillaei and Gymnogongrus furcellatus, two intertidal red algae from central Chile, often grow sympatrically and their gametophytic phases are dominant in the field, but recruitment is low. A shortterm comparative analysis of the reproductive behavior of their gametophytes was carried out to determine quantitative levels of reproduction and their degree of functional similarity. Size, rather than age, was evaluated as predictor of fecundity. Both species showed the same qualitative patterns, although maintaining quantitative differences. Reproductive plants were recorded throughout the size range, and fecundity increased continuously and directly with size. A size-independent threshold in reproductive effort was found for each species, and the variance of effort values decreased inversely with size. Vertical, size-specific life tables revealed low dependence of survivorship with size, and reproductive values exhibited a maximum at the same size class for both species. This last pattern, and a negative relationship found between fecundity and survivorship, suggest the existence of costs or trade-offs operating at the phenotypic level, but they would not be supported in a selective context.

Key words

Algal life history Size Fecundity Maximization Trade-off 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Begon M, Mortimer M (1986) Population Ecology. A unified study of animals and plants, 2nd edn. Blackwell Scientific Publications, OxfordGoogle Scholar
  2. Begon M, Harper JL, Townsend CR (1986) Ecology: individuals, populations and communities. Blackwell Scientific Publications, OxfordGoogle Scholar
  3. Chapman ARO (1986) Age versus stage: an analysis of age- and size-specific mortality and reproduction in a population of Laminaria longicruris Pyl J Exp Mar Biol Ecol 97:113–122Google Scholar
  4. Clayton MN (1988) Evolution and life histories of brown algae. Bot Mar 31:379–387Google Scholar
  5. De Wreede RE, Klinger T (1988) Reproductive strategies in algae. In: Lovett-Doust J, Lovett-Doust L (eds) Plant reproductive ecology: patterns and strategies. Oxford University Press, Oxford, pp 267–284Google Scholar
  6. Guiry MD (1987) The evolution of life history types in the Rhodophyta: an appraisal. Cryptog Algol 8:1–12Google Scholar
  7. Gunnill FG (1980) Demography of the intertidal brown alga Pelvetia fastigiata in southern California, USA. Mar Biol 59:169–197Google Scholar
  8. Hannach G, Santelices B (1985) Ecological differences between the isomorphic phases of two species of Iridaea (Rhodophyta: Gigartinales). Mar Ecol Prog Ser 22:291–303Google Scholar
  9. Hoffmann AJ, Camus PA (1989) Sinking rates and viability of spores from benthic algae in central Chile. J Exp Mar Biol Ecol 126:281–291Google Scholar
  10. Hughes TP, Connell JH (1987) Population dynamics based on size or age? a reef-coral analysis. Am Nat 129:818–829Google Scholar
  11. Istock C (1967) The evolution of complex life cycles phenomena: an ecological perspective. Evolution 21:592–605Google Scholar
  12. Lubchenco J, Cubit J (1980) Heteromorphic life histories of certain marine algae as adaptations to variations in herbivory. Ecology 61:676–687Google Scholar
  13. Luxoro C, Santelices B (1989) Additional evidence for ecological differences among isomorphic reproductive phases of Iridaea laminarioides (Rhodophyta: Gigartinales). J Phycol 25:206–212Google Scholar
  14. Maggs CA (1988) Intraspecific life history variability in the Florideophycidae (Rhodophyta). Bot Mar 31:465–490Google Scholar
  15. Maggs CA, Cheney DP (1990) Competition studies of marine macroalgae in laboratory culture. J Phycol 26:18–24Google Scholar
  16. Nisbet RM, Bence JR (1989) Alternative dynamic regimes for canopy-forming kelp: a variant on density-vague population regulation. Am Nat 134:377–408Google Scholar
  17. Partridge L, Harvey PH (1989) The ecological context of life history evolution. Science 241:1449–1455Google Scholar
  18. Pease CM, Bull JJ (1988) A critique of methods for measuring life history trade-offs. J Evol Biol 1:293–303Google Scholar
  19. Russell G (1986) Variation and natural selection in marine macroalgae. Oceanogr Mar Biol Annu Rev 24:309–377Google Scholar
  20. Santelices B (1990) Patterns of reproduction, dispersal and recruitment in seaweeds. Oceanogr Mar Biol Annu Rev 28:177–276Google Scholar
  21. Santelices B, Camus PA, Hoffmann AJ (1989) Ecological studies for harvesting and culturing Gymnogongrus furcellatus (Rhodophyta, Gigartinales) in central Chile. J Appl Phycol 1:171–181Google Scholar
  22. SAS Institute Inc (1982) SAS user's guide: statistics, 1982 edn North CarolinaGoogle Scholar
  23. Searles RB (1980) The strategy of red algal life history. Am Nat 115:113–120Google Scholar
  24. Sibly RM (1989) What evolution maximizes. Funct Ecol 3:129–135Google Scholar
  25. Siegel S, Castellan NJ (1988) Non-parametric statistics for the behavioral sciences. McGraw-Hill, New YorkGoogle Scholar
  26. Slocum C (1980) Differential susceptibility to grazers of an intertidal alga: advantages of heteromorphic generations. J Exp Mar Biol Ecol 46:99–110Google Scholar
  27. Statgraphics (1988) User's guide reference, 3rd edn. STS IncGoogle Scholar
  28. Stearns SC (1989) Trade-offs in life history evolution. Funct Ecol 3:259–268Google Scholar
  29. Strathmann RR (1990) Why life stories evolved differently in the sea. Am Zool 30:197–207Google Scholar
  30. Tilman D (1990) Constraints and trade-offs: toward a predictive theory of competition and succession. Oikos 58:3–15Google Scholar

Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Patricio A. Camus
    • 1
  1. 1.Departamento de Ecología, Facultad de Ciencias BiológicasP. Universidad Católica de ChileSantiagoChile

Personalised recommendations