Show simple item record

dc.contributor.authorLittler, Mark M.
dc.contributor.authorLittler, Diane S.
dc.date.accessioned2020-09-03T11:17:47Z
dc.date.available2020-09-03T11:17:47Z
dc.identifier.urihttps://scholar.oxy.edu/handle/20.500.12711/9300
dc.description.abstractA localized storm on 9 May 1977 produced deluge-level quantities of rain (2.56 cm within 3 h) causing flooding of the rocky shoreline at Corona del Mar, California. Unlike the patterns observed throughout 1975 and 1976 and at a comparable site 40 km to the north during the same time period, the sea urchin Strongylocentrotus purpuratus experienced a significant decrease in cover (from about 2.0% to less than 0.1%, P < 0.05, ANOVA) in the lower intertidal zone (MLLW to +0.3 m) and disappeared entirely within the +0.3 to +0.6 m interval. Belt transects documented an average of 90.5% mortality, whereas a census of the total area between the two permanent transect lines revealed 93.6% of the S. purpuratus to be dead. A biotically similar area beyond the periphery of the region flooded (20 m north of the north transect line) experienced only 1.1% mortality of S. purpuratus. Ephemeral macrophytes characteristic of disturbed environments, Ulva californica/ Enteromorpha sp. (combined) and Ectocarpaceae, increased significantly in mean overall cover (14.6% and 8.9%, respectively) following the flood, as did newly recruited barnacles. However, the majority of persistent macrophytes, such as Hydrolithon decipiens, blue-green algal crusts, and Gelidium coulteri/pusillum, showed slight (but not significant) declines in mean cover (1.3%, 7.8%, and 5%, respectively). Therefore, stochastic events can have highly-localized species-specific catastrophic effects on intertidal populations which may set in motion subsequent changes to overall community structure that would be difficult to understand if a program of infrequent sampling was used.
dc.subjectStochastic Processes
dc.subjectRocky-Intertidal
dc.subjectBiotas
dc.subjectFlash Flood
dc.subjectCorona del Mar
dc.subjectCalifornia
dc.titleEffects of Stochastic Processes on Rocky-Intertidal Biotas: An Unusual Flash Flood near Corona del Mar, California
dc.title.alternativeEffects of Stochastic Processes on Rocky-Intertidal Biotas
dc.typearticle
dc.abstract.formatonep
dc.source.beginpage95
dc.source.issuescas/vol86/iss2
dc.source.issue2
dc.identifier.legacyhttps://scholar.oxy.edu/scas/vol86/iss2/5
dc.source.endpage106
dc.source.peer_reviewedTRUE
dc.source.statuspublished
dc.source.volume86
dc.source.journaltitleScas: Bulletin of the Southern California Academy of Sciences


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record