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Physical Sciences and Mathematics Commons

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Articles 1 - 5 of 5

Full-Text Articles in Physical Sciences and Mathematics

Accelerated Erosion Of Saltmarshes Infested By The Non-Native Burrowing Crustacean Sphaeroma Quoianum, Timothy Mathias Davidson, Catherine E. De Rivera Nov 2010

Accelerated Erosion Of Saltmarshes Infested By The Non-Native Burrowing Crustacean Sphaeroma Quoianum, Timothy Mathias Davidson, Catherine E. De Rivera

Environmental Science and Management Faculty Publications and Presentations

Lateral erosion of saltmarshes is affected by many abiotic and biotic factors. While abiotic factors are typically regarded as primary drivers of erosion, biotic influences such as burrowing or bioturbating taxa can also extensively modify the physical structure of this marine habitat. Many estuaries on the Pacific coast of North America have been invaded by populations of the burrowing non-native isopod Sphaeroma quoianum, which are thought to exacerbate the erosion of saltmarshes. We conducted a mensurative experiment to examine the relationship between populations of S. quoianum and lateral erosion rate of saltmarshes in Coos Bay, Oregon, USA. After 1 …


The Effectiveness Of Vertebrate Passage And Prevention Structures: A Study Of Boeckman Road In Wilsonville, Catherine E. De Rivera, Leslie L. Bliss-Ketchum Sep 2010

The Effectiveness Of Vertebrate Passage And Prevention Structures: A Study Of Boeckman Road In Wilsonville, Catherine E. De Rivera, Leslie L. Bliss-Ketchum

Environmental Science and Management Faculty Publications and Presentations

One of the most obvious impacts roads have on the natural world is direct mortality to individual animals that attempt to cross roads. A less obvious but likely more important impact of roads on many species is habitat fragmentation. The ability for individuals to travel between subpopulations is the key to genetic diversity as well as ultimately the survival of the species. Considering these impacts and management goals to increase habitat connectivity, increased attention has been given to creating road design that reduces wildlife collisions. Most studies, however, have been in other countries or regions and most focus on connectivity …


Complex Interactions Between Regional Dispersal Of Native Taxa And An Invasive Species, Angela L. Strecker, Shelley E. Arnott Apr 2010

Complex Interactions Between Regional Dispersal Of Native Taxa And An Invasive Species, Angela L. Strecker, Shelley E. Arnott

Environmental Science and Management Faculty Publications and Presentations

In the event of an environmental disturbance, dispersal of native taxa may provide species and genetic diversity to ecosystems, increasing the likelihood that there will be species and genotypes present that are less vulnerable to the disturbance. This may allow communities to maintain functioning during a disturbance and may be particularly important when the perturbation is novel to the system, such as the establishment of an invasive species. We examined how dispersal of native species may influence crustacean zooplankton communities in freshwater lakes invaded by the invertebrate predator, Bythotrephes longimanus. Using large enclosures, we experimentally tested the effect of …


Predicting Global Change Effects On Forest Biomass And Composition In South-Central Siberia, Eric J. Gustafson, Anatoly Z. Shvidenko, Brian R. Sturtevant, Robert M. Scheller Apr 2010

Predicting Global Change Effects On Forest Biomass And Composition In South-Central Siberia, Eric J. Gustafson, Anatoly Z. Shvidenko, Brian R. Sturtevant, Robert M. Scheller

Environmental Science and Management Faculty Publications and Presentations

Multiple global changes such as timber harvesting in areas not previously disturbed by cutting and climate change will undoubtedly affect the composition and spatial distribution of boreal forests, which will, in turn, affect the ability of these forests to retain carbon and maintain biodiversity. To predict future states of the boreal forest reliably, it is necessary to understand the complex interactions among forest regenerative processes (succession), natural disturbances (e.g., fire, wind, and insects), and anthropogenic disturbances (e.g., timber harvest). We used a landscape succession and disturbance model (LANDIS-II) to study the relative effects of climate change, timber harvesting, and insect …


Forest Restoration In A Mixed-Ownership Landscape Under Climate Change, Catherine Ravenscroft, Robert M. Scheller, David J. Mladenoff, Mark A. White Mar 2010

Forest Restoration In A Mixed-Ownership Landscape Under Climate Change, Catherine Ravenscroft, Robert M. Scheller, David J. Mladenoff, Mark A. White

Environmental Science and Management Faculty Publications and Presentations

The article presents a study regarding forest management associated with climate change. It mentions that preservation endeavors and restoration schemes should diminish current threats like unsuited forest management and development while integrating possible effects of climate change. It also stresses that an adaptive approach to management can be the most efficient strategy of forest restoration given the doubts of climate change impacts.