Population dynamics of the foraminiferan Glabratella ornatissima (Cushman) in Northern California

Relationship between benthic foraminifera and food resources in South San Francisco Bay, California, USA

“…Foraminiferal populations have been shown to increase in response to blooms in primary production (Lee et al 1966, Lee & Muller 1973, Erskian & Lipps 1987, Alve & Murray 1994. In South San Francisco Bay, I found that both total foraminiferal standing crop and the standing crops of individual taxa (and to a lesser extent, total biovolume) exhibit seasonal cycles similar to those of sediment organic matter levels.…”

“…Previous studies have documented links between benthic foraminiferal populations and cycles in food supply and/or levels of organic matter, and have found evidence that benthic foraminifera are efficient at quickly exploiting food resources, both in shallow and deep water environments (Buzas 1969, Lee & Muller 1973, Arnal et al 1980, Erskian & Lipps 1987, Alve & Murray 1994, Kitazato & Ohga 1995, Ohga & Kitazato 1997, Altenbach & Struck 2001, Murray 2001). Foraminiferal populations have been shown to increase in response to blooms in primary production (Lee et al 1966, Lee & Muller 1973, Erskian & Lipps 1987, Alve & Murray 1994.…”

“…Other workers have suggested that measuring sediment chlorophyll may be the best proxy for food supply (Buzas 1969, Erskian & Lipps 1987, Altenbach & Sarnthein 1989, Murray & Alve 2000. Some workers have measured multiple potential food resources including sediment amino acids (Kroencke et al 2000).…”

Pulsating Patches History and Analyses of Spatial, Seasonal, and Yearly Distribution of Living Benthic Foraminifera

“…However, Murray (2000) performed a one-way ANOVA on the standing crop and found no differences between years. Erskian and Lipps (1987) followed populations of Glabratella ornatissima on algae and in sediments near the Bodega Marine Laboratory in northern California. Single observations were made weekly from 1975 to 1977 on algae as well as within the sediment.…”

“…Agamont densities were high in the winter of 1976 and spring of 1977, with much higher population densities in 1977. Wilson and Dawe (2006) reanalyzed the data of Erskian and Lipps (1987) quantitatively by time series analysis. A plot of two-year time series indicated maximum abundances differed between years, but 12 month seasonality could be confi rmed only provisionally.…”