We present the evolution of oceanographic conditions off the western coast of South America between 1996 and 1999, including the cold periods of 1996 and 1998–1999 and the 1997–1998 El Niño, using satellite observations of sea level, winds, sea surface temperature (SST), and chlorophyll concentration. Following a period of cold...
The evolution of oceanographic conditions in the upwelling region off northern Chile
(18°–24°S) between 1996 and 1998 (including the 1997–1998 El Niño) is presented using
hydrographic measurements acquired on quarterly cruises of the Chilean Fisheries Institute, with
sea surface temperature (SST), sea level, and wind speeds from Arica (18.5°S), Iquique...
A major goal of the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) has been to understand the impacts of climate change and variability on the coastal ecosystems of the inner shelf of the California Current Large Marine System in particular, and other marine and even nonmarine systems more generally....
Terrestrial land use activities present cross-ecosystem threats to riverine and marine species and processes. Specifically, pesticide runoff can disrupt hormonal, reproductive, and developmental processes in aquatic organisms, yet non-point source pollution is difficult to trace and quantify. In Oregon, U.S.A., state and federal forestry pesticide regulations, designed to meet regulatory...
Climate change affects public land ecosystems and services throughout the American West and these effects
are projected to intensify. Even if greenhouse gas emissions are reduced, adaptation strategies for public lands
are needed to reduce anthropogenic stressors of terrestrial and aquatic ecosystems and to help native species
and ecosystems survive...
Predatorprey interactions are a primary structuring force vital to the resilience of marine communities and sustainability of the worlds oceans. Human influences on marine ecosystems mediate changes in species interactions. This generality is evinced by the cascading effects of overharvesting top predators on the structure and function of marine ecosystems....
Relieving phosphorus loading is a key management tool for controlling Lake Erie eutrophication. During the
1960s and 1970s, increased phosphorus inputs degraded water quality and reduced central basin hypolimnetic
oxygen levels which, in turn, eliminated thermal habitat vital to cold-water organisms and contributed to the
extirpation of important benthic macroinvertebrate...
A 38-day, 5990-cast microstructure study on the equator performed
during the onset of the 1991-1993 El Nino shows the effect on small-scale activity
at 140°W of an equatorial Kelvin wave. By using two ships, data were taken
continuously from November 4 to December 12, 1991, near the National Oceanic
and...
dependence and regulation of relatively large local populations? If so, what are the causative mechanisms and their implications? We conducted an eight-year multigeneration study of population dynamics of bicolor damselfish (Stegastes partitus) inhabiting four large coral reefs in the Bahamas. After a four-year baseline period, it was clear that two...
Direct demographic density dependence is necessary for population regulation and is a central concept in ecology, yet has not been studied in many invasive species, including any invasive marine fish. The red lionfish (Pterois volitans) is an invasive predatory marine fish that is undergoing exponential population growth throughout the tropical...