Physical Sciences and Mathematics Commons^™

Plant Community Composition And Structure Monitoring In Scotts Bluff National Monument, 2013 Annual Report, Isabel Ashton, Michael Prowatzke

United States National Park Service: Publications

Introduction

During the last century, much of the prairie within the Northern Great Plains has been plowed for cropland, planted with non-natives to maximize livestock production, or otherwise developed, making it one of the most threatened ecosystems in the United States. Within Nebraska, greater than 77% of the area of native mixed grass prairie has been lost since European settlement (Samson and Knopf 1994). The National Park Service (NPS) plays an important role in preserving and restoring some of the last pieces of intact prairies within its boundaries. The stewardship goal of the NPS is to “preserve ecological integrity and …

Missouri National Recreational River 2012 Resource Brief, Isabel W. Ashton, Michael Prowatzke, Kara Paintner

United States National Park Service: Publications

Includes brief information on plant community monitoring, water quality monitoring, and weather and climate monitoring for the Missouri National Recreational River in the United States for 2012.

Assessment Of A Rotenone Application Event At Mormon Island West Lake In Central Nebraska, Keith D. Koupal, Brian C. Peterson, Casey W. Schoenebeck

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Fisheries managers applied rotenone to Mormon Island West in August of 2010 to renovate a fish community that was hypothesized to be unbalanced (i.e., dominated with gizzard shad and common carp) based on standardized survey results. We estimated species-specific biomass following the lake renovation to provide a baseline biomass estimate for a sand pit lake and to evaluate the effectiveness of standardized sampling gears. Gizzard shad (Dorosoma cepedianum) were abundant in all sampling gears, but mostly stock-size (>175 mm total length) and larger individuals were caught in gill and trap nets and sub-stock (≤175 mm total length) …

Agate Fossil Beds National Monument 2012 Resource Brief, Marcia Wilson, Kara Paintner, Isabel Ashton, Michael Prowatzke

United States National Park Service: Publications

Includes brief information on plant community monitoring, aquatic invertebrate monitoring, weather and climate monitoring at Agate Fossil Beds National Monument in Nebraska, USA from 2012.

Scotts Bluff National Monument 2012 Resource Brief, Isabel W. Ashton, Michael Prowatzke, Kara Paintner

United States National Park Service: Publications

Includes brief information on plant community monitoring, air quality monitoring, and weather and climate monitoring at Scotts Bluff National Monument in Nebraska, USA in 2012.

Field Guide For Nebraska Aquatic Invasive Species (Fg-26)

School of Natural Resources: Faculty Publications

No abstract provided.

Field Guide For Nebraska Invasive Plants (Fg-27)

School of Natural Resources: Faculty Publications

What are Invasive Species: Invasive species are non-native organisms introduced into new ecosystem whose introduction and ability to spread causes environmental or economic harm, or harm to human health. Once established, these species cause irreparable harm, including: introducing disease; competing with native specics; changing the physical characteristics of natural areas; and negatively impacting local and national economies.

Invasive Species Regulations: This guide identifies federal and state-listed noxious weeds. Federal noxious weeds are regulated by the U.S. Department of Agriculture; State noxious weeds are regulated by the Nebraska Department of Agriculture Animal and Plant Health Noxious Weed Program. Aquatic invasive …

Correction Of Location Errors For Presence-Only Species Distribution Models, Trevor Hefley, David M. Baasch, Andrew J. Tyre, Erin E. Blankenship

School of Natural Resources: Faculty Publications

1. Species distribution models (SDMs) for presence-only data depend on accurate and precise measurements of geographical and environmental covariates that influence presence and abundance of the species. Some data sets, however, may contain both systematic and random errors in the recorded location of the species. Environmental covariates at the recorded location may differ from those at the true location and result in biased parameter estimates and predictions from SDMs.

2. Regression calibration is a well-developed statistical method that can be used to correct the bias in estimated coefficients and predictions from SDMs when the recorded geographical location differs from the …

Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2012 Annual Report, Isabel W. Ashton, Stephen K. Wilson, Daniel J. Swanson, Michael Prowatzke, Phil Graeve

United States National Park Service: Publications

Executive Summary

Agate Fossil Beds National Monument (AGFO) plays a vital role in protecting and managing some of the last remnants of native mixed-grass prairie in the region. The Northern Great Plains Inventory & Monitoring Network (NGPN) and Fire Ecology Program (FireEP) surveyed 12 long-term monitoring plots in Agate Fossil Beds National Monument in 2012 as part of an effort to better understand the condition of plant communities in the park. We measured plant diversity and cover, looked for the presence of exotic species that may be newly invading the park, and evaluated the amount of human and natural disturbance …