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Life Sciences

2005

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The University of Maine

Articles 1 - 5 of 5

Full-Text Articles in Physical Sciences and Mathematics

Minerva 2005, The Honors College Dec 2005

Minerva 2005, The Honors College

Minerva

This issue of Minerva includes an article on the development of HON 170: Currents & Contexts; a discussion of the Honors College's "Last Lecture Series;" a reflection on the legacy of former Honors Program Director, Robert Thomson; and an article on the visual art found around the Honors College complex.

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Collaborative Research: Toward Environmental Genomics: Can We Estimate Bacterial Diversity In The Ocean?, Daniel L. Distel Nov 2005

Collaborative Research: Toward Environmental Genomics: Can We Estimate Bacterial Diversity In The Ocean?, Daniel L. Distel

University of Maine Office of Research Administration: Grant Reports

Environmental genomics, wherein the total genomic diversity of a natural community may be sampled and analyzed in an ecological context, remains an elusive goal. This is due, at least in part, to (I) a lack of reliable estimates of total community diversity and (II) a lack of information regarding the exact phylogenetic, genomic and ecological units measured by commonly used diversity estimators. Although ribosomal RNA approaches have provided the first steps towards diversity estimation, and are widely used as a proxy for unique bacterial types in natural populations, the genomic unit a ribotype measures remains largely unexplored. It is generally …

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Implications Of Spatial Autocorrelation And Dispersal For The Modeling Of Species Distributions, Volker Bahn Aug 2005

Implications Of Spatial Autocorrelation And Dispersal For The Modeling Of Species Distributions, Volker Bahn

Electronic Theses and Dissertations

Modeling the geographical distributions of wildlife species is important for ecology and conservation biology. Spatial autocorrelation in species distributions poses a problem for distribution modeling because it invalidates the assumption of independence among sample locations. I explored the prevalence and causes of spatial autocorrelation in data from the Breeding Bird Survey, covering the conterminous United States, using Regression Trees, Conditional Autoregressive Regressions (CAR), and the partitioning of variance. I also constructed a simulation model to investigate dispersal as a process contributing to spatial autocorrelation, and attempted to verify the connection between dispersal and spatial autocorrelation in species' distributions in empirical …

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Digital Vertical Aerial Camera System For High-Resolution Site Inspections In Conservation Easment Monitoring, Kenton Williams Jan 2005

Digital Vertical Aerial Camera System For High-Resolution Site Inspections In Conservation Easment Monitoring, Kenton Williams

Electronic Theses and Dissertations

A three-level satellite to ground monitoring scheme for conservation easement monitoring has been implemented in which high-resolution imagery serves as an intermediate step for inspecting high priority sites. A digital vertical aerial camera system was developed to fulfill the need for an economical source of imagery for this intermediate step. A method for attaching the camera system to small aircraft was designed, and the camera system was calibrated and tested. To ensure that the images obtained were of suitable quality for use in Level 2 inspections, rectified imagery was required to provide positional accuracy of 5 meters or less to …

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U.S. Forest Ownership: Historic And Global Perspective, Lloyd C. Irland Jan 2005

U.S. Forest Ownership: Historic And Global Perspective, Lloyd C. Irland

Maine Policy Review

Mainers once enjoyed the sense that the state’s vast forested lands would forevermore be a feature of the state’s landscape and cultural heritage. However, this sensibility has been threatened by fragmentation and sprawl and rapid changes in ownership. According to Lloyd Irland, Maine is not unique. The U.S. is facing a crisis of sustainability in forests and rural communities. Irland provides a brief history of forest ownership in the U.S. and analyzes some global trends to help to explain this crisis. He suggests Mainers look to experiences elsewhere in the nation and world to come up with a new mix …

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