Index Catalog // ScholarsArchive@OSU

Bottom-up regulation of a pelagic community through spatial aggregations - not biomass

Creator:: Benoit-Bird, Kelly J. and McManus, Margaret A.
Abstract:: The importance of spatial pattern in ecosystems has long been recognized. However, incorporating patchiness into our understanding of forces regulating ecosystems has proven challenging. We used a combination of continuously sampling moored sensors complemented by shipboard sampling to measure the temporal variation, abundance, and vertical distribution of four trophic levels...
Resource Type:: Article
Full Text:: Bottom-up regulation of a pelagic community through spatial aggregations - not biomass

Bottom-up and top-down forces in tidepools : the influence of nutrients, herbivores, and wave exposure on community structure

Creator:: Nielsen, Karina Johanna
Abstract:: The relationship between nutrients and community structure is poorly understood in open-coast habitats. I created a system of artificial tidepools, of identical age and physical dimensions, at two sites that differed in wave exposure, and manipulated nutrient levels and the abundance of herbivores. Using these unique field mesocosms, I explored...
Resource Type:: Dissertation
Full Text:: ABSTRACT A simple food-chain model of community structure was used to evaluate the roles of bottom-up

A critical scale in plankton aggregations across coastal ecosystems

Creator:: Benoit-Bird, Kelly J., Shroyer, Emily L., and McManus, Margaret A.
Abstract:: We examined the characteristics of biological patches at four different locations to assess the relationship of patch vertical scale, amplitude, and persistence. In contrast to patches of larger animals, we found that the majority of coherent aggregations of plankton at each site were vertically compressed, with most smaller than 5m...
Resource Type:: Article
Full Text:: . J., and M. A. McManus (2012), Bottom-up regulation of a pelagic community through spatial

Bio-physical interactions of small pelagic fish schools and zooplankton prey in the California Current System over multiple scales

Creator:: Kaltenberg, Amanda May
Abstract:: Small pelagic fish represent a critical trophic link between plankton and large predators in marine upwelling ecosystems such as the California Current System. Populations of these fish are highly variable over time and are characterized by extreme fluctuations in abundance, which have significant ecosystem impacts. The causes driving this instability...
Resource Type:: Dissertation
Full Text:: pelagic fish at various temporal and spatial scales (i.e., daily, weekly patterns of wind-driven

Intertidal Ecology along the Western Coastlines of the Pacific : Upwelling and Bottom-up Effects in Chile and Oregon

Creator:: Murphy, Christina A.
Abstract:: The coastal regions of Chile and Oregon are some of the most productive ecosystems in the world. The intertidal communities of both areas have been well studied, but much remains to be learned about how those communities are structured over large scales. Here, I explore the upwelling regimes and the...
Resource Type:: Honors College Thesis
Full Text:: . A. (1992). "Community Regulation - under What Conditions Are Bottom-up Factors Important on Rocky

Upland Habitat Conservation Areas - San Juan County Best Available Science Synthesis, Chapter 4

Creator:: Adamus, Paul R. and Earth Design Consultants, Inc.
Abstract:: This document provides definitions and a general overview of streams and lakes of San Juan County (SJC) and then describes impacts to these water bodies and strategies for determining widths of buffers that protect their functions. It similarly provides definitions and a general overview of SJC upland (terrestrial) habitats, describes...
Resource Type:: Technical Report
Full Text:: .................................................................................................................... 88 iii Appendices 4‐A. Occurrence of SJC Wildlife Species by Island 4‐B. Occurrence of

Wetlands - San Juan County Best Available Science Synthesis, Chapter 2

Creator:: Adamus, Paul R. and Fralich, Richard
Abstract:: This document partially addresses the Wetlands component of San Juan County’s Critical Areas Ordinance (CAO). Drawing from a foundation in best available science, it describes important functions performed by the County's wetlands, effects of various activities on those functions, and strategies for protecting wetland functions from impacting activities, with an...
Resource Type:: Technical Report
Full Text:: to County regulation requires a site visit by a qualified wetland professional, and for each of the

Disentangling bottom-up and top-down effects on survival during early ocean residence in a population of Chinook salmon (Oncorhynchus tshawytscha)

Creator:: Miller, Jessica A., Teel, David J., Baptista, Antonio, and Morgan, Cheryl A.
Abstract:: We evaluated the relative importance of "bottom-up" (production-limited) and "top-down" (predator-mediated) processes during early marine residence in a population of Chinook salmon (Oncorhynchus tshawytscha) from the upper Columbia River, USA. We examined length, mass, and condition index of age-0 juveniles collected in the ocean during June and September across 11...
Resource Type:: Article
Full Text:: Disentangling bottom-up and top-down effects on survival during early ocean residence in a population of Chinook

A Critical Time Window for Organismal Interactions in a Pelagic Ecosystem

Creator:: Benoit-Bird, Kelly J. and McManus, Margaret A.
Abstract:: To measure organismal coherence in a pelagic ecosystem, we used moored sensors to describe the vertical dynamics of each step in the food chain in shelf waters off the west shore of Oahu, Hawaii. Horizontally extensive, intense aggregations of phytoplankton, zooplankton, and micronekton exhibited strong diel patterns in abundance and...
Resource Type:: Article
Full Text:: is tied physically [11,12,13] or computationally [14]. However, even a description of spatial

Variation in the maturity schedule of English sole and its influence on calculating the F₃₅ ̳% target fishing rate

Creator:: Al-Jufaily, Saud M.
Resource Type:: Masters Thesis
Full Text:: latitude, depth, and bottom type had significant effects on the growth rate of English sole. On a

ScholarsArchive@OSU

Bottom-up regulation of a pelagic community through spatial aggregations - not biomass

Bottom-up and top-down forces in tidepools : the influence of nutrients, herbivores, and wave exposure on community structure

A critical scale in plankton aggregations across coastal ecosystems

Bio-physical interactions of small pelagic fish schools and zooplankton prey in the California Current System over multiple scales

Intertidal Ecology along the Western Coastlines of the Pacific : Upwelling and Bottom-up Effects in Chile and Oregon

Upland Habitat Conservation Areas - San Juan County Best Available Science Synthesis, Chapter 4

Wetlands - San Juan County Best Available Science Synthesis, Chapter 2

Disentangling bottom-up and top-down effects on survival during early ocean residence in a population of Chinook salmon (Oncorhynchus tshawytscha)

A Critical Time Window for Organismal Interactions in a Pelagic Ecosystem

Variation in the maturity schedule of English sole and its influence on calculating the F₃₅ ̳% target fishing rate

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