Marine Biological Station, University of Liverpool, Port Erin, Isle of Man, Great Britain.
SURVIVAL OF FUCOID EMBRYOS IN THE INTERTIDAL ZONE DEPENDS UPON DEVELOPMENTAL STAGE AND MICROHABITAT1
Version of Record online: 27 OCT 2004
Journal of Phycology
Volume 27, Issue 2, pages 179–186, April 1991
How to Cite
Brawley, S. H. and Johnson, L. E. (1991), SURVIVAL OF FUCOID EMBRYOS IN THE INTERTIDAL ZONE DEPENDS UPON DEVELOPMENTAL STAGE AND MICROHABITAT. Journal of Phycology, 27: 179–186. doi: 10.1111/j.0022-3646.1991.00179.x
Received 16 July 1990. Accepted 17 December 1990.
We thank I. R. Davison, M. Denny, R. T. Paine, D. Stoner, and the reviewers for comments on earlier versions of the manuscript, the National Science Foundation (S.H.B.) and the Office of Naval Research (L.E.J.) for support of this work, J. Connor and the Monterey Bay Aquarium for providing irradiance data, and M. Denny for a topographic map of our field site.
- Issue online: 27 OCT 2004
- Version of Record online: 27 OCT 2004
- benthic community structure;
- fucoid development;
- intertidal zone;
- post-settlement survival;
Embryos of the fucoid alga Pelvetia fastigiata (J. Ag.) DeToni were outplanted into the intertidal zone to assess survival during the physical stress brought about by emersion during a single low tide. Survival varied among microhabitats. Under the adult Pelvetia canopy, survival of 6-h-, 24-h-, 48-h-, and 1-wk-old embryos was nearly 100%. Almost all embryos of all ages died in exposed habitats on bare rock or within habitats where the Pelvetia canopy was removed experimentally. However, within red algal turfs, where most juvenile Pelvetia occur, survival was unusually age specific: 24- to 48-h-old embryos survived poorly compared to younger (6 h old) or older embryos (1 wk old). Survival patterns reflected microhabitat temperatures during the experiments. The fate of young post-settlement stages must be studied at these fine temporal and spatial scales to understand the organization of intertidal communities.