Estimating Nitrogen Fixation Rates, Importance, And Short-Term Efficiency In Small, Temperate Reservoirs Using Delta15n Techniques,
2014
University of Arkansas, Fayetteville
Estimating Nitrogen Fixation Rates, Importance, And Short-Term Efficiency In Small, Temperate Reservoirs Using Delta15n Techniques, Bryant Christopher Baker
Graduate Theses and Dissertations
Nitrogen (N2) fixation can give certain species of cyanobacteria a competitive advantage in lake and reservoir phytoplankton. These species of cyanobacteria, along with others that cannot fix N2, can form toxic compounds that impair water quality when present in high concentrations. N2 fixation rates may be substantial in small (< 1.0 km2), temperate reservoirs since these systems experience thermal stratification and often nitrogen (N) limitation throughout a substantial proportion of the year. However, the effects of N2 fixation on N cycling, alleviation of short-term N limitation, and water quality are not well-understood. A mesocosm experiment and ecosystem-scale observational study were conducted to 1) determine the efficiency of N2 fixation under varying N relative to phosphorus (P) supply, 2) examine the effects of N2 fixation on autotrophic biomass accumulation and microcystin production, and 3) measure N2 fixation rates and importance to autotrophic N demand and zooplankton N assimilation. Results of the mesocosm experiment indicated that N2 fixation was increased at low N:P supply under high P. However, N2 fixation was inefficient at alleviating N limitation when fixed N was the primary source of N. Additionally, microcystin production occurred only at high N:P supply when N2 fixation was low, indicating that reducing external N inputs may have a positive effect on water quality. Results of whole-reservoir determination of N2 fixation using seston δ15N natural abundances indicated that N2 fixation rates throughout the warm season were substantial and influenced by water temperature. Annual N2 fixation rates ranged from 2.2 - 6.6 g N m-2 yr-1, and contributed up to 19% of the annual autotrophic N demand. Zooplankton were assimilating fixed N in most of the study reservoirs, representing a possible mechanism of ecosystem fixed N retention. Collectively, these results suggest that N2 fixation plays a substantial role in N cycling in small, temperate reservoirs, but likely cannot alleviate short-term N limitation.
Long-Term Effects Of Broiler Litter Application Rate On Runoff, Leaching, And Soil Respiration From A Captina Silt Loam,
2014
University of Arkansas, Fayetteville
Long-Term Effects Of Broiler Litter Application Rate On Runoff, Leaching, And Soil Respiration From A Captina Silt Loam, Richard Mcmullen
Graduate Theses and Dissertations
Producers in regions with intense broiler (Gallus gallus) production take advantage of the plant nutrients contained in broiler litter (BL) to enhance yields of forage grasses. However, application of BL to pasture lands in karst regions, like the Ozark Highlands, can potentially reduce water quality if BL-derived contaminants enter surface or groundwater via runoff or drainage. Additionally, BL applications stimulate carbon dioxide (CO2) release from the soil to the atmosphere and may contribute to global warming. The objectives of this study were to determine long-term trends in runoff and soil leachate water quality and to evaluate soil respiration …
Runnins River And Burr’S Pond 2013,
2014
Bridgewater State University
Runnins River And Burr’S Pond 2013
Watershed Access Lab Projects
No abstract provided.
Runnins River Biosurvey- 2013sy,
2014
Bridgewater State University
Water Analysis Of Abbott Run, North Attleboro, Ma,
2014
Bridgewater State University
Water Analysis Of Abbott Run, North Attleboro, Ma
Watershed Access Lab Projects
No abstract provided.
Cambodia, Kingdom Of Water....Or Is It?,
2014
Bridgewater State University
Cambodia, Kingdom Of Water....Or Is It?, Jennifer Mendell
Watershed Access Lab Projects
No abstract provided.
Extream Ecology: A Water Quality Assessment Of The Rumford River,
2014
Bridgewater State University
Extream Ecology: A Water Quality Assessment Of The Rumford River
Watershed Access Lab Projects
No abstract provided.
The Agawam River - A Healthier River System - 10 Years Later,
2014
Bridgewater State University
The Agawam River - A Healthier River System - 10 Years Later
Watershed Access Lab Projects
No abstract provided.
U.S. Drought Monitor, April 29, 2014,
2014
United States National Oceanic and Atmospheric Administration, National Climatic Data Center
U.S. Drought Monitor, April 29, 2014, Richard R. Heim Jr.
United States Agricultural Commodities in Drought Archive
Drought map of the United States for April 29, 2014 (4/29/14) plus: United States crop areas experiencing drought (map), an approximate percentage of crop located in drought by state (bar graph), and the percentage of crop area located in drought during the past 52 weeks (line graph) for corn, soybeans, hay, cattle, and winter wheat.
Management And Climate Contributions To Satellite-Derived Active Fire Trends In The Contiguous United States,
2014
University of California - Irvine
Management And Climate Contributions To Satellite-Derived Active Fire Trends In The Contiguous United States, Hsiao-Wen Lin, Jessica L. Mccarty, Dongdong Wang, Brendan M. Rogers, Douglas C. Morton, G. James Collatz, Yufang Jin, James T. Randerson
Michigan Tech Research Institute Publications
Fires in croplands, plantations, and rangelands contribute significantly to fire emissions in the United States, yet are often overshadowed by wildland fires in efforts to develop inventories or estimate responses to climate change. Here we quantified decadal trends, interannual variability, and seasonality of Terra Moderate Resolution Imaging Spectroradiometer (MODIS) observations of active fires (thermal anomalies) as a function of management type in the contiguous U.S. during 2001–2010. We used the Monitoring Trends in Burn Severity database to identify active fires within the perimeter of large wildland fires and land cover maps to identify active fires in croplands. A third class …
Tapping The Apocalypse & Healing With Intention,
2014
University of San Francisco
Tapping The Apocalypse & Healing With Intention, Julianne E. Henderson Ms.
Creative Activity and Research Day - CARD
When crisis strikes, practical skills and strategies are critical to one's survival. However, one's positive mentality, relationship with and knowledge of his or her environment, and capacity for compassion when faced with an apocalyptic landscape are just as likely to boost their morale. Maintaining an optimistic consciousness assists human beings with survival, regardless of what level of adversity we face. This research project combines an important skill, which is knowing how to heal oneself naturally with what Nature provides, with the power of our consciousness to determine our success, strength, and overall capacity for withstanding the hurricanes of change.
U.S. Drought Monitor, April 22, 2014,
2014
United States National Oceanic and Atmospheric Administration, National Climatic Data Center
U.S. Drought Monitor, April 22, 2014, Richard R. Heim Jr.
United States Agricultural Commodities in Drought Archive
Drought map of the United States for April 22, 2014 (4/22/14) plus: United States crop areas experiencing drought (map), an approximate percentage of crop located in drought by state (bar graph), and the percentage of crop area located in drought during the past 52 weeks (line graph) for corn, soybeans, hay, cattle, and winter wheat.
U.S. Drought Monitor, April 15, 2014,
2014
National Drought Mitigation Center
U.S. Drought Monitor, April 15, 2014, Brian Fuchs
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for April 15, 2014 (4/15/14) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
U.S. Drought Monitor, April 8, 2014,
2014
National Drought Mitigation Center
U.S. Drought Monitor, April 8, 2014, Brian Fuchs
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for April 8, 2014 (4/8/14) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
Port Of Gloucester, Ma: Groundfish Port Recovery And Revitalization Plan By The City Of Gloucester,
2014
University of Massachusetts Boston
Port Of Gloucester, Ma: Groundfish Port Recovery And Revitalization Plan By The City Of Gloucester, Urban Harbors Institute, University Of Massachusetts Boston, City Of Gloucester, Massachusetts
Urban Harbors Institute Publications
This plan represents another step forward by the City of Gloucester to confront the challenge of declining groundfish stocks and subsequent management measures which have had a profound effect on the fishing industry, the community, and its economy. The plan’s strategies include both short-term recommendations to address the immediate direct impacts on harvesters, fresh fish processors, and associated support businesses, as well as longer-term proposals to bolster and support the industry as it recovers, and proposals to create new economic opportunities built upon Gloucester’s maritime assets, skills, and intellectual capital, and old and new partnerships. The Plan lays out the …
Climate Change In Northern New Hampshire: Past, Present And Future,
2014
University of New Hampshire - Main Campus
Climate Change In Northern New Hampshire: Past, Present And Future, Cameron P. Wake, C. Keeley, Elizabeth A. Burakowski, Peter Wilkinson, Katharine Hayhoe, Anne Stoner, Julie Labrance
The Sustainability Institute Publications
EARTH’S CLIMATE CHANGES. It always has and always will. However, an extensive and growing body of scientific evidence indicates that human activities—including the burning of fossil fuel (coal, oil, and natural gas) for energy, clearing of forested lands for agriculture, and raising livestock—are now the primary force driving change in the Earth’s climate system. This report describes how the climate of northern New Hampshire has changed over the past century and how the future climate of the region will be affected by a warmer planet due to human activities.
U.S. Drought Monitor, April 1, 2014,
2014
Western Regional Climate Center
U.S. Drought Monitor, April 1, 2014, David Simeral
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for April 1, 2014 (4/1/14) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
Climate Change In Southern New Hampshire: Past, Present And Future,
2014
University of New Hampshire - Main Campus
Climate Change In Southern New Hampshire: Past, Present And Future, Cameron P. Wake, Elizabeth A. Burakowski, Peter Wilkinson, Katharine Hayhoe, Anne Stoner, C. Keeley, Julie Labranche
The Sustainability Institute Publications
EARTH’S CLIMATE CHANGES. It always has and always will. However, an extensive and growing body of scientific evidence indicates that human activities—including the burning of fossil fuel (coal, oil, and natural gas) for energy, clearing of forested lands for agriculture, and raising livestock—are now the primary force driving change in the Earth’s climate system. This report describes how the climate of southern New Hampshire has changed over the past century and how the future climate of the region will be affected by a warmer planet due to human activities.
Determining The Dynamics Of Agricultural Water Use: Cases From Asia And Africa,
2014
International Water Management Institute
Determining The Dynamics Of Agricultural Water Use: Cases From Asia And Africa, Lisa-Maria Rebelo, Robyn Johnston, Poolad Karimi, Peter G. Mccornick
Daugherty Water for Food Global Institute: Faculty Publications
Across Africa and Asia, water resources are being affected by a complex mixture of social, economic, and environmental factors. These include climate change and population growth, food prices, oil prices, financial disruptions, and political fluctuations. The need to produce more food will have one of the largest impacts on water and will continue to reshape the patterns of agricultural water use in major food-growing regions. With this increasing demand on water for agriculture, from large-scale irrigation to intensification of rainfed systems, it is becoming increasingly important to ensure that water resources decision-making has access to information that captures the spectrum …
Identifying High Crime Areas Using Spatial Analysis,
2014
University of Southern Maine
Identifying High Crime Areas Using Spatial Analysis, Elisa Trepanier
Thinking Matters Symposium Archive
Crime incident locations and trends are examined spatially using GIS to produce maps that pinpoint high crime areas or Hot Spots Crime mapping aids police departments by identifying areas to allocate limited resources where and when they are most needed. This project introduces the availability of GIS technology to smaller police departments as a tool to assist in the development of crime prevention strategies. In this model crime incident reports for Windham, Maine are geocoded and patterns of motor vehicle and structure burglaries analyzed for date, time and location of incident. An addressing protocol is followed to protect victim privacy …
