The study related the density of herbivores to the length and density of Prionitis spp. in Oregon’s coastal tidepools. Oregon’s coastal rocky intertidal tidepools contain a variety of species interactions, including algal grazing by herbivores. The red branched algae Prionitis spp. is found throughout the rocky intertidal in the low...
Phytoplankton dynamics in Auke Bay, Alaska, were studied during
summer, 1969. Nitrate, chlorophyll a, particulate organic carbon,
phytoplankton and zooplankton species composition and hydrographic
and meteorological data were collected and analyzed.
Nitrate input into Auke Bay through freshwater runoff was negligible.
A bloom of Thalassiosira aestivalis formed the spring bloom...
Zooplankton samples taken during daylight periods in a fast flushing estuary on the Central Oregon coast were analyzed for Brachyuran and Anomuran larvae and also for benthic gammaridean amphipods and Myscidacea. Several larval stages of Pinnixa littoralis, Hemigrapsus oregonensis, Pachycheles spp., Cancer oregonensis and Pagurus granosimanus were sufficiently abundant for...
I begin my talk by identifying the fish species that inhabit the California
Current Large Marine ecosystem (CCLME). Next, I categorize these
species into predator-prey and forage and non-forage fishes. I then present
the current catches, landed values, payment to labour (wages), capital
(profit) and payment to the resource owners...
This paper is aimed at determining the impact of the variability of marine environment conditions on the
capture of a vessel that exploit the red seabream fishery of the Strait of Gibraltar. This paper estimates
first and second order elasticities of a Translog approximation of a Stochastic Distance Functions of...
Careful analysis and thoughtful synthesis will be necessary for expanding the envelope of
ecological understanding. This work is my attempt at communicating both of these, in relation
to three questions about our understanding of the structure and dynamics of biological diversity.
These questions focus on a) advancing our understanding of...
Observations were made of salinity, temperature, nitrate +
nitrite, phosphate, silicate, total available nitrogen, and chlorophyll
a in nine areas of the Alaskan Inside Passage during April of 1971.
In general all properties indicated the water to be well mixed throughout
this area. The conservative properties were particularly uniform.
The...
An impounded estuary was employed to study primary productivity, community respiration, and community structure as they
related to seasonal and temporal succession, salinity, and water
temperature. Plankton metabolism was studied by means of the
light-and dark-bottle technique. Benthic community metabolism
was determined by using the "diurnal oxygen curve" method.
Four...
Long-term, naturally occurring cycles can cause significant shifts in marine
ecosystems referred to as regime shifts. While the new regime can be as
diverse and ecologically acceptable as that which it replaced, individual
species may completely disappear or be greatly depressed when a regime
shift occurs. In this work we...
