The State of the Hudson 2009

The State of the Hudson 2009

Date: 2009
Creator: New York (State). Hudson River Estuary Program.
Description: This report describes the environmental quality of the Hudson River and its watershed, including issues such as pollution, population growth, and biodiversity. The report also describes the habitats of estuaries, watersheds, and rivers in general.
Contributing Partner: UNT Libraries
Great Lakes Restoration Initiative Action Plan

Great Lakes Restoration Initiative Action Plan

Date: February 21, 2010
Creator: United States. Council on Environmental Quality.
Description: This action plan articulates the most significant ecosystem problems for the Great Lakes, and describes efforts to address them. The five areas are toxic substances, invasive species, health and pollution, wildlife and habitat preservation and restoration, and finally a component that covers accountability and evaluation.
Contributing Partner: UNT Libraries
Invasive Species: Obstacles Hinder Federal Rapid Response to Growing Threat

Invasive Species: Obstacles Hinder Federal Rapid Response to Growing Threat

Date: July 24, 2001
Creator: United States. General Accounting Office.
Description: A letter report issued by the General Accounting Office with an abstract that begins "Invasive species--harmful, nonnative plants, animals, and microorganisms--are widespread throughout the United States, causing billions of dollars of damage annually to crops, rangelands, and waterways. An important part of pest control is quick action to eradicate or contain a potentially damaging invasive species. Federal rapid response to invasive species varies: species that threaten agricultural crops or livestock are far more likely to elicit a rapid response than those primarily affecting forestry or other natural areas, including rangelands and water areas. A major obstacle to rapid response is the lack of a national system to address invasive species. Other obstacles to rapid response include the need for additional detection systems to identify new species; improved partnerships among federal, state, and local agencies; and better technologies to eradicate invasive species. The Invasive Species Council's Management Plan makes several recommendations for improving rapid response, including developing a program of coordinated rapid response and pursuing increases in discretionary spending to support the program. A concerted effort to improve the rapid response is clearly needed. If properly implemented, the Council's recommendations will go a long way toward developing a national system to ...
Contributing Partner: UNT Libraries Government Documents Department
Invasive Species: Progress and Challenges in Preventing Introduction into U.S. Waters Via the Ballast Water in Ships

Invasive Species: Progress and Challenges in Preventing Introduction into U.S. Waters Via the Ballast Water in Ships

Date: September 9, 2005
Creator: United States. Government Accountability Office.
Description: Testimony issued by the Government Accountability Office with an abstract that begins "Numerous invasive species have been introduced into U.S. waters via ballast water discharged from ships and have caused serious economic and ecologic damage. GAO reported in 2002 that at least 160 nonnative aquatic species had become established in the Great Lakes since the 1800s--one-third of which were introduced in the past 30 years by ballast water and other sources. The effects of such species are not trivial; the zebra mussel alone is estimated to have caused $750 million to $1 billion in costs between 1989 and 2000. Species introductions via ballast water are not confined to the Great Lakes, however. The environment and economy of the Chesapeake Bay, San Francisco Bay, Puget Sound, and other U.S. waters have also been adversely affected. The federal government has been taking steps since 1990 to implement programs to prevent the introduction of invasive species from ships' ballast water discharges. However, species introductions are continuing. This testimony discusses the legislative and regulatory history of ballast water management and identifies some of the issues that pose challenges for the federal government's program for preventing the introduction of invasive species via ships' ballast water."
Contributing Partner: UNT Libraries Government Documents Department
Invasive Species: Clearer Focus and Greater Commitment Needed to Effectively Manage the Problem

Invasive Species: Clearer Focus and Greater Commitment Needed to Effectively Manage the Problem

Date: October 22, 2002
Creator: United States. General Accounting Office.
Description: A letter report issued by the General Accounting Office with an abstract that begins "Harmful invasive species--nonnative plants and animals that are spreading throughout the United States--have caused billions of dollars in damage to natural areas, businesses, and consumers. In 2001, the federal government issued a National Invasive Species Management Plan to focus attention on invasive species and coordinate a national control effort involving the 20 or so federal agencies that are responsible for managing them. This report discusses the economic impacts of invasive species, implementation of the management plan, and coordination of U.S. and Canadian efforts to control invasive species, including those introduced to the Great Lakes via the ballast water of ships."
Contributing Partner: UNT Libraries Government Documents Department
Widespread climate-related impacts are occurring now and are expected to increase

Widespread climate-related impacts are occurring now and are expected to increase

Date: 2009
Creator: U.S. Global Change Research Program
Description: This map shows current and projected effects of climate change on various regions of the United States.
Contributing Partner: UNT Libraries
Influence of Sediment Exposure and Water Depth on Torpedograss Invasion of Lake Okeechobee, Florida

Influence of Sediment Exposure and Water Depth on Torpedograss Invasion of Lake Okeechobee, Florida

Access: Use of this item is restricted to the UNT Community.
Date: December 2006
Creator: Smith, Dian H.
Description: Torpedograss (Panicum repens) was first observed in Lake Okeechobee in the 1970s and appears to have displaced an estimated 6,400 ha of native plants, such as spikerush (Eleocharis cellulosa), where inundation depths are often less than 50 cm. Two series of studies evaluated substrate exposure and water depth influences on torpedograss establishment and competitiveness. Results revealed that fragments remain buoyant for extended periods and so facilitate dispersal. Once anchored to exposed substrate fragments can readily root and establish. Subsequently, torpedograss thrives when subjected to inundations to 75 cm and survives prolonged exposure to depths greater than 1 m. These findings suggest that fluctuating water levels contribute to torpedograss dispersal and colonization patterns and that low water levels increase marsh area susceptible to invasion. The competition study found that spikerush grown in monoculture produces significantly more biomass when continually inundated to shallow depths (10 to 20 cm) than when subjected to drier conditions (-25 cm) or greater inundations (80 cm). In contrast, torpedograss establishes more readily on exposed substrate (-25 to 0 cm) compared to inundate substrates. During the first growing season biomass production increases as substrate exposure interval increases. However, during the second year, established torpedograss produces more biomass when ...
Contributing Partner: UNT Libraries
Assessing Habitat Preference of Invasive American Minks (Neovison vison) Using Trap-Cameras in Navarino Island, Chile

Assessing Habitat Preference of Invasive American Minks (Neovison vison) Using Trap-Cameras in Navarino Island, Chile

Date: August 2013
Creator: Crego, Ramiro D. & Jiménez, Jaime E.
Description: Poster presented at the 2013 Ecological Society of America (ESA) Annual Meeting. This poster discusses research on assessing habitat preference of invasive American minks (Neovison vison) using trap-cameras in Navarino Island, Chile.
Contributing Partner: UNT College of Arts and Sciences
Our Planet, Volume 16, Number 2 : Nature's Capital and the Millenium Development Goals

Our Planet, Volume 16, Number 2 : Nature's Capital and the Millenium Development Goals

Date: 2005
Creator: Lean, Geoffrey
Description: Our Planet is a periodical magazine published by the United Nations Environment Programme. This issue is devoted to nature's contributions to biodiversity, recreation, sustainability, and sanitation.
Contributing Partner: UNT Libraries
Tunza: The UNEP Magazine for Youth, Volume 7, Number 3, 2009

Tunza: The UNEP Magazine for Youth, Volume 7, Number 3, 2009

Date: 2009
Creator: Lean, Geoffrey
Description: Tunza is a UNEP magazine for and by young people. This issue is devoted to threatened species, habitats, and the International Year of Biodiversity.
Contributing Partner: UNT Libraries
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