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Filtering by: Subject Insects Degree Field Environmental Sciences

Diversity and community structure of aquatic insects in isolated montane desert streams

Creator:

Bogan, Michael T.

Abstract:

Local aquatic insect diversity and community structure is the result of multiple local and regional factors, and observed patterns depend upon the spatial and temporal scale under examination. Isolated stream systems in arid regions represent a new challenge in understanding the drivers of diversity and community structure, as most studies...

Resource Type:

Masters Thesis

Full Text:

aquatic insect diversity and community structure is the result of multiple local and regional factors
An evaluation of biological control of Linaria dalmatica with Mecinus janthinus in Oregon

Creator:

Park, Alexander

Abstract:

Dalmatian toadflax (Linaria dalmatica) has become a prolific invasive plant of rangelands in Oregon since its arrival in the early 20th century. In 2001, the Oregon Department of Agriculture initiated a release program promoting the distribution of the stem-boring weevil, Mecinus janthinus as classical biological control agent to reduce densities...

Resource Type:

Masters Thesis
Biotic barriers to colonizing new hosts by the cinnabar moth Tyria jacobaeae (L.)(Lepidoptera: Arctiidae)

Creator:

Karacetin, Evrim

Abstract:

The cinnabar moth (Tyria jacobaeae (L.), Lepidoptera: Arctiidae) is an icon in population ecology and biological control that has recently lost its shine based on evidence that (1) it is less effective than alternatives (such as the ragwort flea beetle Longitarsus jacobaeae (Waterhouse) (Coleoptera: Chrysomelidae) for controlling ragwort Senecio jacobaea...

Resource Type:

Dissertation

Full Text:

hosts by this phytophagous insect and thereby mitigate risk of biological control to nontarget plant