Abstract
The overgrowth interactions and spatial relationships amongst 7 interacting bryozoan species in the coastal waters of Bombay were studied. All interspecific encounters involved overgrowth, there being a total absence of ties. On the other hand, in intraspecific encounters, occurrence of ties was quite high. It was observed that a superior overgrowth of any species did not determine its relative abundance. None of the 7 species studied won in all its overgrowth interactions with the others. It was further observed that the success of cheilostome species to dominate over the others did not depend on their ability to grow over through any one particular encounter angle. Ranking of competitive overgrowth abilities amongst the 7 species studied did not form a simple hierarchial sequence but instead formed a competitive network.
Similar content being viewed by others
References
Abugov R 1982 Species diversity and phasing of disturbance;Ecology 63 289–293
Buss L W 1980 Bryozoan overgrowth interactions—the interdependence of competition for space and food;Nature (London) 281 475–477
Buss L W 1981 Group living, competition and evolution of cooperation in a sessile invertebrate;Science 213 1012–1014
Buss L W and Jackson J B C 1979 Competitive networks: nontransitive competitive relationships in cryptic coral reef environments;Am. Nat. 113 223–234
Dayton P K 1971 Competition, disturbance and community organization: The provision and subsequent utilization of space in a rocky intertidal community;Ecol. Monogr. 41 351–389
Jackson J B C 1979 Overgrowth competition between encrusting cheilostome ectoprocts in a Jamaican cryptic reef environment;J. Anim. Ecol. 48 805–823
Jackson J B C and Winston J E 1982 Ecology of cryptic coral reef communities I. Distribution and abundance of major groups of encrusting organisms;J. Exp. Mar. Biol. Ecol. 57 135–147
Osman R W 1977 The establishment and development of a marine epifaunal community;Ecol. Monogr. 47 37–63
Rubin J A 1982 The degree of intransitivity and its measurement in an assemblage of encrusting cheilostome bryozoa;J. Exp. Mar. Biol. Ecol. 60 119–128
Winston J E and Jackson J B C 1984 Ecology of cryptic coral reef communities IV. Community development and life histories of encrusting cheilostome bryozoa;J. Exp. Mar. Biol. Ecol. 76 1–21
Woodin S A and Jackson J B C 1979 Interphyletic competition amongst marine benthos;Am. Zool. 19 1029–1043
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Karande, A.A., Swami, B.S. Overgrowth competitions amongst encrusting cheilostomes. Proc. Indian Acad. Sci. (Anim. Sci.) 97, 141–149 (1988). https://doi.org/10.1007/BF03179941
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF03179941