Metazooplankton dynamics in the Salton Sea, California, 1997–1999

Contaminants in tilapia (Oreochromis mossambicus) from the Salton Sea, California, in relation to human health, piscivorous birds and fish meal production

“…If sustainable, large scale harvesting of fish could potentially help alleviate the eutrophic state of the lake by allowing substantial amounts of phosphorus to be removed from the ecosystem (Gonzá lez et al, 1998;Costa-Pierce & Riedel, 2000). Benefits in the short term could be decreased bird and fish die-offs, increased production of zooplanktonic and zoobenthic populations utilized as food by these vertebrate populations (Detwiler et al, 2002;Tiffany et al, 2001;Watts et al, 2001), reduction in odors produced by the Sea, and increased value of the Sea for sport fishing and other recreational activities. Such benefits were among the goals described in the Salton Sea Reclamation Act of 1998 .…”

Role of the polychaete Neanthes succinea in phosphorus regeneration from sediments in the Salton Sea, California

“…The development of a large phytoplankton biomass and the high water temperatures during spring and summer months (March-August) lead to widespread anoxia and the subsequent formation of hydrogen sulfide in bottom waters below about 10 m (Watts et al, 2001). During strong windstorms, the mixing of these anoxic, hydrogen sulfide-rich bottom waters into overlying water causes mass mortality of plankton, benthic macroinvertebrates, and fish (Detwiler et al, 2002;Riedel et al, 2002;Tiffany et al, 2002). From fall (September-October) to late winter (December-January), declining water temperatures and increasing oxygen concentrations due to increased mixing allow the recolonization of profundal sediments by macroinvertebrates (Detwiler et al, 2002).…”

Ciliate plankton dynamics and survey of ciliate diversity in the Salton Sea, California, 1997–1999

“…Firstly, a 32-L Schindler trap with a mesh of 55 µm was used to quantitatively collect individuals > 55 µm in length at 2 m depth intervals. This trap also collected metazoan zooplankters such as rotifers, copepods and invertebrate larvae, as reported in Tiffany et al (2002). Secondly, for small ciliates and phytoplankton, integrated water samples were collected for the 0-3 m, 3-6 m and 6-9 m depth strata with a PVC tube collector.…”

“…Procedures for enumerations of large protozoan species were as described in Tiffany et al (2002). Briefly, the entire fixed sample from 32 liters was concentrated down to ca.…”

“…One of these ( Figs 3A, B) suddenly appeared in mid-lake plankton in September 1998 and again in late July through mid-October 1999, during times when the entire water column was anoxic, sulfide levels were high, and other ciliates, metazoo-and phytoplankters were absent or scarce ( Fig. 2D; Tiffany et al 2002Tiffany et al , 2007a. During both these periods, large patches of bright green water, indicating the presence of gypsum crystals that form during these events, were observed by satellite at our stations (Tiffany et al 2007b).…”