The accumulation of dieldrin and its effects on species composition of benthic algal communities were studied in laboratory
streams. Effects of dieldrin on photosynthetic and respiratory
rates of the blue-green alga Phormidium retzii were determined using
a Gilson Differential Respirometer.
Dieldrin concentrations ranging from 0.05 to 7.0 ppb were
maintained...
The abundance of algal species and their parasites
was monitored weekly for two years in a sewage lagoon
at the Corvallis Airport, Oregon. During the cooler
months, Euglena species were dominant followed by a
Chlamydomonas assemblage in the spring and a
predominantly Scenedesmus assemblage in the summer and
fall. Parasites...
Due to the development, Japan lost more than half of seaweed beds
because of reclamations, water brake constructions and water pollution
after the WWII. As a result, coastal fisheries production decreased from 2
million metric tons to 1.5 million metric tons. Building a forest in the sea
has been paid...
Clinocardium nuttallii from Yaquina Bay, Oregon, were found to
harbor an algal symbiont in the siphon, mantle and occasionally
the foot tissues. Approximately 35 percent of the population in the
study area was infected to some degree with the alga; however, no
cockles under two years of age were infected....
The nature and magnitude of experimental errors due to ⁶⁵Zn
adsorption by inorganic surfaces was examined in a laboratory system
designed to measure ⁶⁵Zn uptake by marine phytoplankton. In the pH
range, 6.3±.1 to 7.5±.1, a precipitate formed in the algal nutrient
medium selected for the system. To this seawater-base...
