Index Catalog // ScholarsArchive@OSU

The ecological consequences of the reduction of species diversity : experimental approaches

Creator:: Allison, Gary William
Abstract:: The influence of loss of diversity on community dynamics and ecosystem functioning has recently received considerable attention. Although study of biodiversity has a long history within ecology, empirical investigations exploring consequences of loss have been rare. Because many factors confound diversity comparisons, experimental manipulations of diversity offer the most direct...
Resource Type:: Dissertation
Full Text:: diversity : experimental approaches AN ABSTRACT OF THE THESIS OF Gary William Allison for the degree of

Marine herbivore-plant interactions : the feeding ecology of the sea slug Placida dendritica

Creator:: Trowbridge, Cynthia D.
Abstract:: The feeding ecology of a common temperate mesoherbivore, the oligophagous sea slug Placida dendritica (Gastropoda: Opisthobranchia: Ascoglossa), was examined from April 1985 to June 1989. Along the central coast of Oregon, Placida consumed three host species: the low intertidal green algae Codium setchellii, C. fragile, and Bryopsis corticulans. Individual slugs...
Resource Type:: Dissertation
Full Text:: significance of my results. Mark Wilson broadened my perspective of plant ecology during a formative period

Grazing, nutrients, and marine benthic algae : insights into the drivers and protection of diversity

Creator:: Guerry, Anne D., 1973-
Abstract:: Two of the most powerful ways in which humans have altered ecosystems are by increasing productivity and changing the densities of important consumers. The bottom-up effects of productivity and the top-down effects of consumers have been identified as primary determinants of biological diversity, though the links between them remain unclear....
Resource Type:: Dissertation
Full Text:: . Species diversity of seed-eating desert rodents in sand dune habitats. Ecology 54:775-787. Chang, F. H

Biodiversity : illustrations of some concepts, causes, and consequences

Creator:: Russell, Roland B.
Abstract:: 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...
Resource Type:: Dissertation
Full Text:: ecology in terrestrial plant systems (Diaz and Cabido 2001, Lavorel and Gamier 2002, Cornelissen et al

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:: algal diversity and abundance patterns in tidepools along gradients of potential productivity

Phytoplankton shading of marine benthic macrophytes: Implications for intertidal community structure

Creator:: Kavanaugh, Maria T.
Abstract:: Previous observations of light levels and phytoplankton abundances along the Oregon coast demonstrated that phytoplankton attenuated light sufficiently to potentially limit the growth of intertidal macrophytes and therefore structure local intertidal communities. Inspired by this observation, in spring 2004, I initiated a study to quantify the direct and indirect benthic...
Resource Type:: Masters Thesis
Full Text:: diversity to different canopy treatments also differed between sites. Diversity of understory algae was

Population and community ecology of the red alga Rhodomela larix (Turner) C. Agardh, on the central Oregon coast

Creator:: D'Antonio, Carla Marie, 1956-
Abstract:: Aspects of the life history and ecology of the intertidal turf-forming alga Rhodomela larix (Turner) C. Agardh were examined over a two year period at several sites on the Oregon coast. Rhodomela occurred over a broad tidal range and exhibited different growth and morphology characteristics with respect to tidal height....
Resource Type:: Masters Thesis
Full Text:: Population and community ecology of the red alga Rhodomela

The effects of biomechanical and ecological factors on population and community structure of wave-exposed, intertidal macroalgae

Creator:: Blanchette, Carol A.
Abstract:: I examined the biomechanical factors that influence the sizes of intertidal macroalgae by studying a population of Fucus gardneri at Fogarty Creek Point, OR. I constructed a mathematical model to predict optimal sizes and probabilities of survival for Fucus under conditions of high and low wave exposure. Predicted optimal sizes...
Resource Type:: Dissertation
Full Text:: understory species diversity. Limpets played a keystone role by grazing Postelsia, the competitive

Early succession in beds of the red alga, Iridaea cornucopiae Post. & Rupr. (Gigartinaceae) : alternate pathways

Creator:: Olson, Annette M.
Abstract:: Multiple successional sequences have been observed following disturbance in communities on marine hard substrata. Observations of the turf-forming alga, Iridaea cornucopiae Post. & Rupr. (Gigartinaceae), suggest that I. cornucopiae may assume its dominance by its ability to vegetatively pre-empt space. High limpet densities in the natural community, suggest that I....
Resource Type:: Masters Thesis
Full Text:: my advisor, Jane Lubchenco, for the opportunity to study intertidal ecology and for her guidance

Linkages between mangrove forests and coral reefs : quantifying disturbance effects and energy flow between systems

Creator:: Granek, Elise F.
Abstract:: Interface habitats are considered valuable natural systems, tightly linked to adjacent habitats through the flow of matter and energy. However, there is limited research on mechanisms of connectivity such as movement of organisms and particulate matter and ways in which anthropogenic disturbance to interface habitats may affect immediate and adjacent...
Resource Type:: Dissertation
Full Text:: algal biomass and diversity to determine what effects physical changes have on the primary producer

Linking marine communities and ecosystems : invertebrates mediate nutrient availability in intertidal communities

Creator:: Bracken, Matthew E.
Abstract:: While community ecologists have traditionally focused on local-scale processes, it has become apparent that a broader perspective, which explores the community-level ramifications of material fluxes within and between ecosystems, is necessary to effectively evaluate bottom-up influences on community structure and dynamics. In this dissertation, I employed ecosystem principles to understand...
Resource Type:: Dissertation
Full Text:: with Bruce sent me in new and exciting directions. Jane's global perspectives on ecology have helped

Evolutionary and ecological interactions affecting seaweeds

Creator:: Olson, Annette M.
Abstract:: The term "interaction" in evolutionary biology and ecology describes the relationships among variables in two classes of causal models. In the first, "interaction" refers to the influence of a single putatively causal variable on a variable of interest. In the second class of models, the term applies when a third...
Resource Type:: Dissertation
Full Text:: Abstract approved: Jane Lubchenco The term "interaction" in evolutionary biology and ecology describes

Ecological subsidies to rocky shore communities : setting the stage for community dynamics in the Northeast Pacific

Creator:: Krenz, Christopher
Abstract:: This dissertation focuses on the importance of pelagic subsidies in the Northeast Pacific to rocky shore community regulation. My results document the patterns of pelagic subsidy supply, determine if those subsidies are correlated with community structure, and examine if community regulation differs between areas of high- and low-subsidies. Understanding how...
Resource Type:: Dissertation
Full Text:: teaching me about the wonderful world of community ecology and inspiring me with his work ethic and

Effects of environmental stress on intertidal mussel reproduction

Creator:: Petes, Laura E.
Abstract:: Environmental stress can negatively affect the ability of organisms to reproduce. Energetic trade-offs exist in all organisms, and under stress, energy may be allocated away from reproduction and towards physiological defense and repair mechanisms. The rocky intertidal environment is ideal for investigating the influence of environmental stress, as organisms are...
Resource Type:: Dissertation
Full Text:: a Physiological Ecology “Dream Team.” I would like to thank my graduate committee for the

Patterns and dynamics of context-dependency in the marine rocky intertidal

Creator:: Berlow, Eric Layani
Abstract:: As ecologists are being called upon to predict the consequences of human perturbations to natural communities, an important goal is to understand what factors drive variability or consistency in nature. In the rocky intertidal of San Juan Island, Washington, a comparative experimental approach was used to investigate spatial and temporal...
Resource Type:: Dissertation
Full Text:: summarize all of community ecology in a one-page flow chart. Bruce McCune has expanded my thinking by

Diverse consumer guilds in intertidal communities of Oregon and the Republic of Panama and their effects on prey assemblages

Creator:: Gaines, Steven D.
Abstract:: Low intertidal communities of Oregon and Panama have many predator and herbivore species. This diversity of consumers is important to the organization of both communities because of qualitative differences among the consumer species in their ability to circumvent specific prey defenses. In Oregon, the red alga Iridaea cordata is protected...
Resource Type:: Dissertation
Full Text:: communities of Oregon and Panama have many predator and herbivore species. This diversity of consumers is

Oceanographic influences on rocky intertidal communities : coastal upwelling, invertebrate growth rates, and keystone predation

Creator:: Sanford, Eric (Eric David)
Abstract:: The influence of large-scale processes on natural communities has become one of the central issues of modern ecology. I combined field and laboratory studies to investigate the effects of variation in coastal upwelling on rocky intertidal communities along the central Oregon coast. I examined whether the growth of intertidal barnacles...
Resource Type:: Dissertation
Full Text:: on natural communities has become one of the central issues of modern ecology. I combined field and

Selective agents influencing the morphology of coralline algae

Creator:: Padilla, Dianna
Resource Type:: Masters Thesis
Full Text:: . TABLE OF CONTENTS Page I. GENERAL INTRODUCTION 1 II. CHAPTER 1. The Role of Morphology in the Ecology

ScholarsArchive@OSU

The ecological consequences of the reduction of species diversity : experimental approaches

Marine herbivore-plant interactions : the feeding ecology of the sea slug Placida dendritica

Grazing, nutrients, and marine benthic algae : insights into the drivers and protection of diversity

Biodiversity : illustrations of some concepts, causes, and consequences

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

Phytoplankton shading of marine benthic macrophytes: Implications for intertidal community structure

Population and community ecology of the red alga Rhodomela larix (Turner) C. Agardh, on the central Oregon coast

The effects of biomechanical and ecological factors on population and community structure of wave-exposed, intertidal macroalgae

Early succession in beds of the red alga, Iridaea cornucopiae Post. & Rupr. (Gigartinaceae) : alternate pathways

Linkages between mangrove forests and coral reefs : quantifying disturbance effects and energy flow between systems

Linking marine communities and ecosystems : invertebrates mediate nutrient availability in intertidal communities

Evolutionary and ecological interactions affecting seaweeds

Ecological subsidies to rocky shore communities : setting the stage for community dynamics in the Northeast Pacific

Effects of environmental stress on intertidal mussel reproduction

Patterns and dynamics of context-dependency in the marine rocky intertidal

Diverse consumer guilds in intertidal communities of Oregon and the Republic of Panama and their effects on prey assemblages

Oceanographic influences on rocky intertidal communities : coastal upwelling, invertebrate growth rates, and keystone predation

Selective agents influencing the morphology of coralline algae

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