Spatial coexistence of mussel-associated, free-ranging polychaetes in a subtropical intertidal habitat

Mutsunori Tokeshi, L. Romero, J. Tarazona

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Pseudonereis gallapagensis and Halosydna johnsoni coexist in the mussel bed habitat of a rocky shore in Peru. There are 2 mussel beds: the Semimytilus algosus bed which extends widely between the low and mid intertidal, and the Perumytilus purpuratus bed which occurs as a narrow band in the mid-high intertidal. Despite seasonal fluctuations in total population density, the density of large polychaete individuals was stable and the total population biomass was of similar magnitude in the 2 species. Size-frequency distributions followed a similar pattern through the year, with recruitment of young seen in the austral spring. Different size groups of Halosydna had similar levels of dispersion throughout the year, but Pseudonereis showed a wide variation in dispersion among size groups, with large sizes demonstrating more strongly aggregated patterns. Overlap in space between the species was smaller than that within either of the species. Interspecifically, the pair involving larger size groups tended to have lower values of spatial overlap. The Semimytilus bed supported more population biomass of both polychaete species than the Perumytilus bed, though the density of Pseudonereis was not significantly different between the 2 habitats. Large individuals (of Pseudonereis, in particular) were scarce in the Perumytilus bed. The mussel bed is a complex habitat with varying sizes of interstitial space, which is considered to buffer competitive interactions between individuals of different mobility and body sizes and to enhance coexistence of the free-ranging polychaetes. from Authors

Original languageEnglish
Pages (from-to)681-692
Number of pages12
JournalJournal of Animal Ecology
Volume58
Issue number2
DOIs
Publication statusPublished - Jan 1 1989
Externally publishedYes

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group size
Polychaeta
coexistence
mussels
habitat
polychaete
habitats
biomass
Peru
rocky shore
population density
buffers
body size
seasonal variation

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Spatial coexistence of mussel-associated, free-ranging polychaetes in a subtropical intertidal habitat. / Tokeshi, Mutsunori; Romero, L.; Tarazona, J.

In: Journal of Animal Ecology, Vol. 58, No. 2, 01.01.1989, p. 681-692.

Research output: Contribution to journalArticle

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