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Articles 241 - 270 of 365
Full-Text Articles in Aquaculture and Fisheries
Inventory Of The Central Mixed-Grass Prairie Ecoregion Of Kansas And Nebraska, Hillary Loring, Mike Bullerman, Kelly Kindscher
Inventory Of The Central Mixed-Grass Prairie Ecoregion Of Kansas And Nebraska, Hillary Loring, Mike Bullerman, Kelly Kindscher
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
An inventory of potential high quality mixed-grass prairie ranches and large properties within the Central Mixed-Grass Prairie Ecoregion of Kansas and Nebraska was conducted in the spring and summer of 1999. Emphasis during the inventory was placed on identification of relatively intact landscapes. Significant ranches within those untilled landscapes were visited. An interview of the owners or managers of those properties was coupled with a survey of the vegetation. Assessments of quality were based on species composition, continuity of ground cover, observations of livestock impact, and viability of the community types present.
The objectives of this study were to:
1) …
1999 Nebraska Central Mixedgrass Prairie Rapid Ecological Assessment, Mike Bullerman
1999 Nebraska Central Mixedgrass Prairie Rapid Ecological Assessment, Mike Bullerman
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This document has been prepared in partial fulfillment of the 1999 Central Mixedgrass Prairie ecoregion [CMGP] Rapid Ecological Assessment [REA] contract between the Nebraska Chapter of The Nature Conservancy [TNC] and Michael J. Bullerman [“contractor”]. The contract provided for the survey of selected untilled landscapes within the Nebraska portion of the CMGP ecoregion, excluding the Sandhills. The objectives of this study were to:
1) Identify relatively intact CMGP landscapes within the state of Nebraska,
2) Determine the ecological condition, threats, unique features, and conservation potential of these landscapes,
3) Determine land use practices implemented by landowners,
4) Determine landowner attitudes …
Inventory For Endangered, Threatened And Rare Plant And Animal Species Within The Floodplain Corridor Of The Middle Loup River Basin In Nebraska, Michael I. Fritz, Gerry Steinauer
Inventory For Endangered, Threatened And Rare Plant And Animal Species Within The Floodplain Corridor Of The Middle Loup River Basin In Nebraska, Michael I. Fritz, Gerry Steinauer
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This survey was conducted by Nebraska Natural Heritage Program of the Nebraska Game and Parks Commission with funding received from the U.S. Department of the Interior, Bureau of Reclamation, Grand Island office. This agreement was entered into on April 16, 1996. The objective of the agreement was to conduct a survey of a portion of the Loup River basin floodplain corridor for rare plant communities and plant and animal species. This is the final report of that survey. This report includes not only data collected directly as a result of field survey work associated with the project but also previous …
1997 Inventory For Spiranthes Diluvialis Sheviak In Western Nebraska: A Final Report, Volume Ii, Terri Hildebrand
1997 Inventory For Spiranthes Diluvialis Sheviak In Western Nebraska: A Final Report, Volume Ii, Terri Hildebrand
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This study resulted from an agreement between Nebraska Game and Parks Commission (NGPC) and the United States Fish and Wildlife Service (USFW). After the 1996 discovery of Spiranthes diluvialis, in western Nebraska, NGPC was seeking to determine the extent of the Nebraska population. Information on the wet meadow community of orchid occurrence in Nebraska and eastern Wyoming was needed. This report includes descriptions of communities inventoried, Spiranthes diluvialis populations, and additional species monitored by Nebraska and Wyoming Natural Heritage programs.
Between May and September 1997, potential Spiranthes diluvialis habitat was inventoried for occurrences of the orchid. For all sites …
Species Delineation And The Identification Of Evolutionarily Significant Units: Lessons From The Freshwater Mussel Genus Potamilus (Bivalvia: Unionidae), Kevin J. Roe, Charles Lydeard
Species Delineation And The Identification Of Evolutionarily Significant Units: Lessons From The Freshwater Mussel Genus Potamilus (Bivalvia: Unionidae), Kevin J. Roe, Charles Lydeard
Kevin J. Roe
Accurate identification of biological entities is critical to the timely and efficient preservation of biodiversity. Concepts that define segments of biological diversity--species and evolutionarily significant units (ESUs)--should reflect our current knowledge of the biological world. Conflation of different hierarchical definitions of taxa has the potential to obscure distinct biological entities in need of protection. The concept of the ESU has been criticized because it includes within its definition distinct biological entities that otherwise would be recognized as species. Herein we evaluate several versions of the evolutionary significant unit concept and provide as a case study an analysis of geographic variation …
1997 Inventory For Spiranthes Diluvialis Sheviak In Western Nebraska: A Final Report, Volume I, Terri Hildebrand
1997 Inventory For Spiranthes Diluvialis Sheviak In Western Nebraska: A Final Report, Volume I, Terri Hildebrand
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This study resulted from an agreement between Nebraska Game and Parks Commission (NGPC) and the United States Fish and Wildlife Service (USFW). After the 1996 discovery of Spiranthes diluvialis, in western Nebraska, NGPC was seeking to determine the extent of the Nebraska population. Information on the wet meadow community of orchid occurrence in Nebraska and eastern Wyoming was needed. This report includes descriptions of communities inventoried, Spiranthes diluvialis populations, and additional species monitored by Nebraska and Wyoming Natural Heritage programs.
The 1996 discovery of Spiranthes diluvialis in Nebraska by Hazlett merited the need for further inventory for the species …
1998 Southeast Nebraska Tallgrass Praire Inventory: Johnson, Gage, And Jefferson Counties, Final Report, Robert F. Steinauer
1998 Southeast Nebraska Tallgrass Praire Inventory: Johnson, Gage, And Jefferson Counties, Final Report, Robert F. Steinauer
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This report is prepared as a requirement of the 1998 Southeast Nebraska Prairie Survey contract between the Platte/Rainwater Basin Project Office of the Nature Conservancy and Robert F. Steinauer. The original contract called for the examination of Johnson County south of Highway 136, and Gage County east of Beatrice. Due to the scarcity of prairies in these areas, the survey region was expanded to include northern Johnson County, and southern Jefferson County.
Prairies in these areas were identified using infrared and black and white photos, driving on county and within grassland roads, and conversations with landowners. Heritage Program “Site Survey …
Terrestrial Natural Communities Of Nebraska - Version I, Gerry Steinauer, Steven B. Rolfsmeier
Terrestrial Natural Communities Of Nebraska - Version I, Gerry Steinauer, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The Nebraska Natural Heritage Program has been collecting information and data including published literature, field observations and vegetation plot data over the last 10 years of development of Nebraska’s natural community classification. The classification contains 27 wetland and 36 upland communities including forest, woodland, shrubland, herbaceous, and sparsely vegetated (e.g. rock outcrop) types. The community types were distinguished primarily on plant species composition and to a lesser extent on soils, hydrology and geographic location. The classification contains descriptions of each community type that include dominant species, soils, range, and other ecological information. The classification is designed to be flexible enough …
Changes In Reproductive Morphology And Physiology Observed In The Amphipod Crustacean, Melita Nitida Smith, Maintained In The Laboratory On Polluted Estuarine Sediments, John T. Tanacredi Ph.D., B. Borowsky, P. Aitken-Ander
Changes In Reproductive Morphology And Physiology Observed In The Amphipod Crustacean, Melita Nitida Smith, Maintained In The Laboratory On Polluted Estuarine Sediments, John T. Tanacredi Ph.D., B. Borowsky, P. Aitken-Ander
Faculty Works: CERCOM
An earlier study showed that the amphipod crustacean Melita nitida Smith maintained on sediments dosed with waste crankcase oil developed physiological and morphological abnormalities. Most notably, mature females developed abnormal setae along the edges of their brood plates. The present study was conducted to determine whether similar abnormalities might be induced in animals maintained on polluted field sediments containing petroleum by-products among other toxic substances. In the laboratory, heterosexual pairs were maintained on three sediments taken from Jamaica Bay (New York) plus one control sediment and one toxic substratum (Ulva lactuca (L.) thalli). The results mirrored the results of …
Identification Of A Fish Host Of The Inflated Heelsplitter Potamilus Inflatus( Bivalvia: Unionidae) With A Description Of Its Glochidium, Kevin J. Roe, Andrew M. Simons, Paul Hartfield
Identification Of A Fish Host Of The Inflated Heelsplitter Potamilus Inflatus( Bivalvia: Unionidae) With A Description Of Its Glochidium, Kevin J. Roe, Andrew M. Simons, Paul Hartfield
Kevin J. Roe
A survey of the fishes of the lack Warrior River was undertaken to determine fish host(s) of the federally threatened inflated heelsplitter, Potamilus inflatus. Seven hundred-twenty individual fishes representing 30 species were examined; mussel glochidia were found on 10 individual fishes representing nine species. Potamilus inflatus glochidia were only found infesting one freshwater drum (Aplodinotus grunniens), which is concordant with previous findings for the genus Potamilus. The morphology of P. inflatus glochidia is described and compared to P. purpuratus.
1997 Rapid Ecological Assessment Northern Great Plains Steppe Ecoregion: Western And Central South Dakota, Northwestern Nebraska, Eastern Wyoming, A Final Report, Terri Hildebrand
1997 Rapid Ecological Assessment Northern Great Plains Steppe Ecoregion: Western And Central South Dakota, Northwestern Nebraska, Eastern Wyoming, A Final Report, Terri Hildebrand
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
In an effort to gain a more complete understanding of existing vegetative communities of the Northern Great Plains Steppe Ecoregion, rapid ecological assessment was undertaken throughout the ecoregion during the field season of 1997. Field office personnel of The Nature Conservancy and private contractors evaluated previously delineated regions in accordance with methodology determined in May of 1997. The following document presents results of the rapid ecological assessments performed by Hildebrand Contracting. The purpose of this document is to provide The Nature Conservancy with information to help determine the vegetative features of regions sampled. The specific areas and boundaries for evaluation …
Rare And Endangered Plants At Gateway National Recreation Area: A Case For Protection Of Urban Natural Areas, Richard Stalter, Michael D. Byer, John T. Tanacredi Ph.D.
Rare And Endangered Plants At Gateway National Recreation Area: A Case For Protection Of Urban Natural Areas, Richard Stalter, Michael D. Byer, John T. Tanacredi Ph.D.
Faculty Works: CERCOM
The diversity of native plant species in urban environments is usually overlooked when biodiversity levels are considered. Inventories of native plants reveal many to be rare species surviving the harsh conditions encountered in urban ecosystems. Knowledge of their existence and an inventory of their distribution will assist in maintaining these populations. Protection strategies for rare plant species are outlined for urban National Parks.
A Tribal Perspective On Esa Reform, Ted Strong
A Tribal Perspective On Esa Reform, Ted Strong
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
4 pages.
How The Regulated Community Views Regulation To Protect Living Resources: The Endangered Species Act, Biological Diversity, And Ecosystem Management, Steven P. Quarles
How The Regulated Community Views Regulation To Protect Living Resources: The Endangered Species Act, Biological Diversity, And Ecosystem Management, Steven P. Quarles
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
21 pages.
Contains footnotes.
Reform Of The Endangered Species Act: Overview Of Administrative Reforms [Congressional Hearing Material Submitted By Bruce E. Babbitt, Secretary, Department Of Interior], Dinah Bear
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
31 pages.
The Endangered Species: The Urban Water Utility Perspective, Chips Barry
The Endangered Species: The Urban Water Utility Perspective, Chips Barry
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
24 pages.
Habitat Based, Multi-Species Hcps: Lessons From The Northwest, James A. Kraft
Habitat Based, Multi-Species Hcps: Lessons From The Northwest, James A. Kraft
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
9 pages.
Columbia River Salmon: Are Any Of The Esa Tools Adequate For The Job?, John M. Volkman
Columbia River Salmon: Are Any Of The Esa Tools Adequate For The Job?, John M. Volkman
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
32 pages.
Contains footnotes.
Upper Colorado River Fish: A Recovery Program That Is Working – Myth Or Reality?, James S. Lochhead
Upper Colorado River Fish: A Recovery Program That Is Working – Myth Or Reality?, James S. Lochhead
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
24 pages (includes 1 map).
Contains 2 pages of references.
The Esa, Water Rights, And Regulatory Takings, Barton H. Thompson, Jr.
The Esa, Water Rights, And Regulatory Takings, Barton H. Thompson, Jr.
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
28 pages.
Contains 2 pages of references.
The Enigma Of The Blind Salamander And Groundwater Pumping: Lessons From The Edwards Aquifer, Texas, Charles R. Shockey
The Enigma Of The Blind Salamander And Groundwater Pumping: Lessons From The Edwards Aquifer, Texas, Charles R. Shockey
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
39 pages (includes illustrations and maps).
Contains footnotes.
A Comparison: Lessons From The Columbia Basin And The Upper Colorado Basin Fish Recovery Efforts, Mary Christina Wood
A Comparison: Lessons From The Columbia Basin And The Upper Colorado Basin Fish Recovery Efforts, Mary Christina Wood
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
47 pages.
Contains 5 pages of references.
Water Rights, Contract Rights, And The Endangered Species Act, Brian E. Gray
Water Rights, Contract Rights, And The Endangered Species Act, Brian E. Gray
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
12 pages.
Contains references.
The Endangered Species Act: Tramping On Tribal Rights?, Robert S. Pelcyger
The Endangered Species Act: Tramping On Tribal Rights?, Robert S. Pelcyger
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
32 pages.
Contains footnotes.
The Endangered Species Act—Economic Impacts: The Perception And The Numbers, Jon A. Souder
The Endangered Species Act—Economic Impacts: The Perception And The Numbers, Jon A. Souder
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
13 pages (includes illustrations).
Contains 2 pages of references.
An Overview Of The Endangered Species Act, Michael J. Brennan
An Overview Of The Endangered Species Act, Michael J. Brennan
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
25 pages.
Landscape Scale Habitat Conservation Plans: The California Experience, Lindell L. Marsh
Landscape Scale Habitat Conservation Plans: The California Experience, Lindell L. Marsh
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
24 pages.
Contains 3 pages of references.
Agenda: Biodiversity Protection: Implementation And Reform Of The Endangered Species Act, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Biodiversity Protection: Implementation And Reform Of The Endangered Species Act, University Of Colorado Boulder. Natural Resources Law Center
Biodiversity Protection: Implementation and Reform of the Endangered Species Act (Summer Conference, June 9-12)
Conference organizers and/or faculty included University of Colorado School of Law professors Betsy Rieke, David H. Getches, Michael A. Gheleta and Charles F. Wilkinson.
All across the country--in Congress, in state legislatures and in urban and rural communities--people are discussing why we should or should not protect biodiversity and how best to do so. Since the Endangered Species Act is up for reauthorization, a variety of reform proposals are being debated. Speakers--including natural resource scholars, experts from the private and nonprofit sectors, and government officials--will examine the rationale for biodiversity protection, the legal framework of the Endangered Species Act, and …
Irrigation, Power, And Salmon: The Case For Voluntary Water Transfers In The Columbia Basin, Eric Kuhner
Irrigation, Power, And Salmon: The Case For Voluntary Water Transfers In The Columbia Basin, Eric Kuhner
Center for Urban Studies Publications and Reports
This paper begins with a brief history of water law in the west, illustrating the roots of conflict over water allocation. A more detailed examination of activities in the Columbia Basin follows, describing the many parties affected by issues of water use and the overlapping institutional structures that govern the river and its water.
Sources of pressure to change the current pattern of water use are then considered. These include requirements to protect endangered salmon runs and the change over time in the relative values of water for power production and irrigation. This section demonstrates how changes in the value …
1996 Ecological Evaluation Cunningham Creek Potential Research Natural Area, A Final Report, Terri Hildebrand
1996 Ecological Evaluation Cunningham Creek Potential Research Natural Area, A Final Report, Terri Hildebrand
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The Cunningham Creek potential Research Natural Area (RNA) is located approximately 27.2 km (17 miles) east-southeasterly of Crawford, Nebraska or 40 km (25 miles) southwesterly of Chadron, Nebraska. Located on the Pine Ridge District of the Nebraska National Forest, the site is included in the Pine Ridge ecosystem of western Nebraska. Four hundred hectares (1000 acres) consisting of deciduous woodlands, pine forests, and upland prairies are located in the survey area. Inclusions of wet meadows, oak woodland, and aquatic systems intermingle in the deciduous woodland. Cattle grazing and recreation are the primary uses of the area. The purpose of this …