Index Catalog // ScholarsArchive@OSU

Top-down and Bottom-up Controls of Adelges tsugae in the Pacific Northwest Inform Its Biological Control in Eastern North America

Creator:: Rose, Alexander
Abstract:: The hemlock woolly adelgid (Hemiptera: Adelgidae: Adelges tsugae; HWA) is an invasive and damaging pest on hemlock in eastern North America. HWA is native to the Pacific Northwest, where it does not damage hemlock. In support of classical biological control of HWA in eastern North America, abundances of native predators...
Resource Type:: Masters Thesis
Full Text:: of Master of Science in Forest Ecosystems and Society presented on May 11, 2017. Title: Top-down

The Roles of Large Top Predators in Coastal Ecosystems: New Insights from long Term Ecological Research

Creator:: Rosenblatt, Adam E., Heithaus, Michael R., Mather, Martha E., Matich, Philip, Nifong, James C., Ripple, William J., and Silliman, Brian R.
Abstract:: Abstract: During recent human history, human activities such as overhunting and habitat destruction have severely impacted many large top predator populations around the world. Studies from a variety of ecosystems show that loss or diminishment of top predator populations can have serious consequences for population and community dynamics and ecosystem...
Resource Type:: Article
Full Text:: actions have affected all four processes, top-down processes have been particularly strongly altered

Large Predators Limit Herbivore Densities in Northern Forest Ecosystems

Creator:: Ripple, William J. and Beschta, Robert L.
Abstract:: There is a lack of scientific consensus about how top-down and bottom-up forces interact to structure terrestrial ecosystems. This is especially true for systems with large carnivore and herbivore species where the effects of predation versus food limitation on herbivores are controversial. Uncertainty exists whether top-down forces driven by large...
Resource Type:: Article
Full Text:: Abstract 9 There is a lack of scientific consensus about how top-down and bottom-up forces 10 interact

Estimating heterotrophic respiration at large scales: challenges, approaches, and next steps

Creator:: Bond-Lamberty, Ben, Epron, Daniel, Harden, Jennifer, Harmon, Mark E., Hoffman, Forrest, Kumar, Jitendra, David McGuire, Anthony, and Vargas, Rodrigo
Abstract:: Heterotrophic respiration (HR), the aerobic and anaerobic processes mineralizing organic matter, is a key carbon flux but one impossible to measure at scales significantly larger than small experimental plots. This impedes our ability to understand carbon and nutrient cycles, benchmark models, or reliably upscale point measurements. Given that a new...
Resource Type:: Article
Full Text:: and time. We argue that DFTs should be initially informed by top- down expert opinion, but ultimately

Challenges to stakeholder participation in coastal resource management : Allen, Northern Samar, Philippines

Creator:: Ulrich, Donald R.
Abstract:: Collaborative management of subsistence fisheries in the Philippines requires policies that devolve authority to the local level. This involves creating mechanisms to hold managers accountable for creating opportunities for active participation by fisher folk communities. The Philippines has created a comprehensive national framework for the co-management of coastal resources at...
Resource Type:: Masters Thesis
Full Text:: management strategy in the Philippines has created smaller, dispersed top-down processes in Allen that

(Re)claiming forestry : a case study of women's empowerment

Creator:: Redmore, Lauren E.
Abstract:: Nonindustrial private forest (NIPF) owners control a significant portion of forestland nationwide. Even though women own or manage NIPF lands, we know very little about how women manage forestland and what barriers women face in forest management. In addition, while there are several forestry organizations available to NIPF owners, few...
Resource Type:: Masters Thesis
Full Text:: traditional top-down model of knowledge diffusion to a more holistic approach where university, extension

A comparison of shark and wolf research reveals similar behavioral responses by prey

Creator:: Wirsing, Aaron J. and Ripple, William J.
Abstract:: Marine and terrestrial ecologists rarely exchange information, yet comparing research from both sides of the land–sea boundary holds great potential for improving our understanding of ecological processes. For example, by comparing the interaction between tiger sharks (Galeocerdo cuvier) and dugongs (Dugong dugon) to that between gray wolves (Canis lupus) and...
Resource Type:: Article
Full Text:: , Frid A, Wirsing AJ, et al. 2007. State-dependent risk-taking by green sea turtles mediates top-down

The Rise of the Mesopredator

Creator:: Prugh, Laura R., Stoner, Chantal J., Epps, Clinton W., Bean, William T., Ripple, William J., Laliberte, Andrea S., and Brashares, Justin S.
Abstract:: Apex predators have experienced catastrophic declines throughout the world as a result of human persecution and habitat loss. These collapses in top predator populations are commonly associated with dramatic increases in the abundance of smaller predators. Known as “mesopredator release,” this trophic interaction has been recorded across a range of...
Resource Type:: Article
Full Text:: frequently occurs when top- down control of predators is removed.We begin by defining mesopredator release

Master Negotiators and Creative Problem Solvers: A Survey of South African Women & Water-Use Case Studies

Creator:: Kirwan, Christina E. M.
Abstract:: Through a desk-top analysis, this research shows that South African women have gained and utilize specialized skills, behaviors, and adaptations through their daily activities which are useful when applied to water resource management. Further, South African women are shown to build and draw on social capital as a way to...
Resource Type:: Capstone Project
Full Text:: Solvers: A Survey of South African Women & Water-Use Case Studies. Abstract: Through a desk-top

Transgenic poplars with reduced lignin show impaired xylem conductivity, growth efficiency and survival

Creator:: Voelker, Steven L., Lachenbruch, Barbara, Meinzer, Frederick C., Kitin, Peter, and Strauss, Steven H.
Abstract:: We studied xylem anatomy and hydraulic architecture in 14 transgenic insertion events and a control line of hybrid poplar (Populus spp.) that varied in lignin content. Transgenic events had different levels of down‐regulation of two genes encoding 4‐coumarate:coenzyme A ligase (4CL). Two‐year‐old trees were characterized after growing either as free‐standing...
Resource Type:: Article

ScholarsArchive@OSU

Top-down and Bottom-up Controls of Adelges tsugae in the Pacific Northwest Inform Its Biological Control in Eastern North America

The Roles of Large Top Predators in Coastal Ecosystems: New Insights from long Term Ecological Research

Large Predators Limit Herbivore Densities in Northern Forest Ecosystems

Estimating heterotrophic respiration at large scales: challenges, approaches, and next steps

Challenges to stakeholder participation in coastal resource management : Allen, Northern Samar, Philippines

(Re)claiming forestry : a case study of women's empowerment

A comparison of shark and wolf research reveals similar behavioral responses by prey

The Rise of the Mesopredator

Master Negotiators and Creative Problem Solvers: A Survey of South African Women & Water-Use Case Studies

Transgenic poplars with reduced lignin show impaired xylem conductivity, growth efficiency and survival

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search