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Articles 4141 - 4170 of 6144

Full-Text Articles in Biodiversity

Spawning Salmon Disrupt Trophic Coupling Between Wolves And Ungulate Prey In Coastal British Columbia, Chris T. Darimont, Paul C. Paquet, Thomas E. Reimchen Sep 2008

Spawning Salmon Disrupt Trophic Coupling Between Wolves And Ungulate Prey In Coastal British Columbia, Chris T. Darimont, Paul C. Paquet, Thomas E. Reimchen

Nonindigenous Pests and Biological Invasions Collection

Background: As a cross-boundary resource subsidy, spawning salmon can strongly affect consumer and ecosystem ecology. Here we examine whether this marine resource can influence a terrestrial wolf-deer (Canis lupus-Odocoileus hemionus) predator-prey system in coastal British Columbia, Canada. Data on resource availability and resource use among eight wolf groups for three seasons over four years allow us to evaluate competing hypotheses that describe salmon as either an alternate resource, consumed in areas where deer are scarce, or as a targeted resource, consumed as a positive function of its availability. Faecal (n = 2203 wolf scats) and isotopic analyses (n = 60 …


A Case Study Of A Successful Lake Rehabilitation Project In South-Central Nebraska, Peter J. Spirk, Brad Newcomb, Keith D. Koupal Sep 2008

A Case Study Of A Successful Lake Rehabilitation Project In South-Central Nebraska, Peter J. Spirk, Brad Newcomb, Keith D. Koupal

The Prairie Naturalist

Cottonmill Lake, a 17.4 ha impoundment located in Buffalo County, Nebraska, was a fishery dominated by common carp (Cyprinus carpio). As a result of the poor sportfish populations, angler participation in May and June of 1993 was low (503 ± 210 angler hours) and angler catch rates for all fish species (0.5 ± 0.4 fish/angler hour) was less than desired. In 1995, before rehabilitation, bluegill (Lepomis macrochirus) trap net catch per unit effort (CPUE) was 1.5 ± 0.9, largemouth bass (Micropterus salmoides) catch per hour of electrofishing was 8.0 ± 0.5, and channel catfish (Ictalurus punctatus) …


The Prairie Naturalist. Volume 40, No. 3/4 September/December 2008, The Great Plains Natural Science Society Sep 2008

The Prairie Naturalist. Volume 40, No. 3/4 September/December 2008, The Great Plains Natural Science Society

The Prairie Naturalist

WINTERKILL AND BIOMASS OF THE PAINTED TURTLE IN A SOUTH DAKOTA WETLAND. S. G. Platt, Z. Fast Horse, W. Cross, S. Mannel, and T. R. Rainwater

NON-BLACKBIRD AVIAN OCCURRENCE AND ABUNDANCE IN NORTH DAKOTA SUNFLOWER FIELDS. O. A. Schaaf, G. M. Linz, C. Ooetkott, M. W. Lutman, and W. J. Bleier

USING LOCAL KNOWLEDGE AND REMOTE SENSING TO MAP KNOWN AND POTENTIAL PRAIRIE-CHICKEN DISTRIBUTION IN KANSAS. M. E. Houts, R. O. Rodgers, R. D. Applegate, and W. H. Busby

A CASE STUDY OF A SUCCESSFUL LAKE REHABILITATION PROJECT IN SOUTH-CENTRAL NEBRASKA. P. J. Spirk, B. A. Newcomb, and K. O. …


Non-Blackbird Avian Occurrence And Abundance In North Dakota Sunflower Fields, Dionn A. Schaaf, George M. Linz, Curt Doetkott, Mark W. Lutman, William J. Bleier Sep 2008

Non-Blackbird Avian Occurrence And Abundance In North Dakota Sunflower Fields, Dionn A. Schaaf, George M. Linz, Curt Doetkott, Mark W. Lutman, William J. Bleier

The Prairie Naturalist

Sunflower fields are well-documented as foraging habitat for fallmigrating blackbirds (Family Icteridae). There is, however, a paucity of information on the use of sunflower fields by non-blackbirds. We assessed non-blackbird use of 12 ripening sunflower fields in the Prairie Pothole Region of central North Dakota. From mid-August to mid-October 2000, we counted 4,129 individual birds, consisting of 22 families and 61 species, in the sample fields and within 5 m of the field edges. We saw the largest number of birds from 18 September to 27 September. The Family Emberizidae (sparrows) accounted for 26% of the species and 20% of …


Winterkill And Biomass Of The Painted Turtle In A South Dakota Wetland, Steven G. Platt, Zannita Fast Horse, Warren Cross, Sylvio Mannel, Thomas R. Rainwater Sep 2008

Winterkill And Biomass Of The Painted Turtle In A South Dakota Wetland, Steven G. Platt, Zannita Fast Horse, Warren Cross, Sylvio Mannel, Thomas R. Rainwater

The Prairie Naturalist

Winterkill occurs when drought conditions expose hibernating turtles to desiccation and lethaly cold temperatures. Winterkill is thought to represent a major source of mortality in northern populations of the painted turtle (Chrysemys picta), but few field observations are available. We herein reported on catastrophic winterkill among western painted turtle (C. pieta bellii) at Limestone Butte Lake (LBL) in western South Dakota during the winter of 2003-2004. Additionally, we used the carcasses of winterkilled turtles (n = 86) to estimate the standing crop biomass of the painted turtle at LBL (0.6 kg/ha). This was the only estimate …


Using Local Knowledge And Remote Sensing To Map Known And Potential Prairie-Chicken Distribution In Kansas, Michael E. Houts, Randy D. Rodgers, Roger D. Applegate, William H. Busby Sep 2008

Using Local Knowledge And Remote Sensing To Map Known And Potential Prairie-Chicken Distribution In Kansas, Michael E. Houts, Randy D. Rodgers, Roger D. Applegate, William H. Busby

The Prairie Naturalist

The greater prairie-chicken (Tympanuchus cupido) and lesser prairie-chicken (Tympanuchus pallidicinctus) have experienced considerable fluctuations in their range and distribution over time. Having current range maps would help wildlife managers and policy makers with decisions regarding prairie-chicken habitat. To create an updated and accurate map of the Kansas prairie-chicken range, a two-pronged approach was implemented. First, a map of potential habitat was created by using known habitat preferences and avoidance factors. Second, a preliminary map showing the distribution of greater and lesser prairie-chickens was created and mailed to regional experts for comments and edits. The returned edits …


Nest Site Preference And Nesting Success Of Upland Sandpiper On Grazing Systems In East Central North Dakota-, Blane A. Klemek Sep 2008

Nest Site Preference And Nesting Success Of Upland Sandpiper On Grazing Systems In East Central North Dakota-, Blane A. Klemek

The Prairie Naturalist

require ranchers to move their cattle throughout the range from one paddock to another, thereby allowing formerly grazed paddocks to regenerate. This is beneficial in a number of ways: overgrazing is reduced, cattle weight-gains are improved, suitable nesting cover for ground nesting birds is produced, and the overall health of the grassland is enhanced (Sedivec and Barker 1991). The objectives of my study were to investigate nesting success of the upland sandpiper as a function of grazing regime. Specifically, I was interested in comparing nesting success between RGS and non-rotational grazing systems (NRGS) and to examine relationships between nest site …


Semi-Melanistic White-Tailed Deer In Northern Wisconsin, Christopher N. Jacques, Keith R. Mccaffery, Jonathan Jenks, John T. Baccus Sep 2008

Semi-Melanistic White-Tailed Deer In Northern Wisconsin, Christopher N. Jacques, Keith R. Mccaffery, Jonathan Jenks, John T. Baccus

The Prairie Naturalist

Melanistic color morphs of white-tailed deer (Odocoileus virginianus) are differentiated from other recognized color morphs by having uniform black hairs on the dorsal surface with subdued black hairs on the ventral surface, dark face and ears, a distinctive mid-dorsal stripe extending from the head to the apex of the tail, and a tail with black dorsally and white ventrally (Baccus and Posey 1999). Melanism results from the overproduction of the skin pigment melanin and is considered rare in white-tailed deer populations (Severinghaus and Cheatum 1956, Sauer 1984, Smith et al. 1984). Semi-melanistic deer have the same dark pelage …


The Prairie Naturalist 2008, Volume 40: Reviewers, Author Index, & Subject Index Sep 2008

The Prairie Naturalist 2008, Volume 40: Reviewers, Author Index, & Subject Index

The Prairie Naturalist

No abstract provided.


A New Species Of Genus Laboulbenia (Laboulbeniales) On Craspedophorus Formosanus (Coleoptera, Carabidae) From Taiwan, With A Note On Laboulbenia Asiatica, Katsuyuki Terada, Meng-Hao Hsu, Wen-Jer Wu Aug 2008

A New Species Of Genus Laboulbenia (Laboulbeniales) On Craspedophorus Formosanus (Coleoptera, Carabidae) From Taiwan, With A Note On Laboulbenia Asiatica, Katsuyuki Terada, Meng-Hao Hsu, Wen-Jer Wu

Aliso: A Journal of Systematic and Floristic Botany

Laboulbenia taiwaniana sp. nov. on Craspedophorus formosanus is described from Taiwan and illustrated with photographs. It is characterized by a long, asymmetrical perithecium with an oblique apex and a pale-colored lower wall, a slender, evenly tapered receptacle with cylindrical cell I and II and trapezoidal cell IV, well developed appendages with black septa concentrated in the basal portion of the appendage system, and especially by black septa on the distal end of cell g. Laboulbenia asiatica, which was described from an Asian carabid---"Casnonia sp."---in 1899 and was illustrated in 1908 by Thaxter, is reviewed and compared …


Laboulbeniales On Semiaquatic Heteroptera. A New Species Of Triceromyces (Ascomycota, Laboulbeniales) On Microvelia (Heteroptera, Veliidae) From Spain, Sergio Santamaria Aug 2008

Laboulbeniales On Semiaquatic Heteroptera. A New Species Of Triceromyces (Ascomycota, Laboulbeniales) On Microvelia (Heteroptera, Veliidae) From Spain, Sergio Santamaria

Aliso: A Journal of Systematic and Floristic Botany

A new species of fungal genus Triceromyces (Laboulbeniales) is described: Triceromyces benjaminii. The description is based on several thalli found on the insect host Microvelia pygmaea (Heteroptera, Veliidae), collected in two localities from SE Spain. Characteristics of male and female thalli of this dioecious species are discussed and compared with other dioecious taxa. The characteristics of male thalli require some adjustment in generic limits. This is the first species of Triceromyces known to parasitize a species of Microvelia, a semiaquatic heteropteran genus. The new species is described and illustrated with line drawings and photographs. A table collates information …


The Genus Prolixandromyces (Laboulbeniales) In The Old World Prolixandromyces (Laboulbeniales), Alex Weir Aug 2008

The Genus Prolixandromyces (Laboulbeniales) In The Old World Prolixandromyces (Laboulbeniales), Alex Weir

Aliso: A Journal of Systematic and Floristic Botany

Two new species of Prolixandromyces (Laboulbeniales) parasitic on Rhagovelia (Heteroptera: Veliidae) are described and illustrated: Prolixandromyces benjaminii from the Philippine Islands and P. lanceolatus from Africa (Madagascar, Malawi, Nigeria, Sierra Leone, and South Africa) and Asia (Indonesia: Sulawesi, Sumba, Timor; Malaysia: Selangor; and Sri Lanka). In order to accommodate these species the circumscription of Prolixandromyces is emended. The new taxa are compared with the one known species from the Old World, P. triandrus from Spain, and with the five known New World taxa.


New Species Of Cucujomyces (Laboulbeniales) On Chilean Leiodidae, Walter Rossi, Alex Weir Aug 2008

New Species Of Cucujomyces (Laboulbeniales) On Chilean Leiodidae, Walter Rossi, Alex Weir

Aliso: A Journal of Systematic and Floristic Botany

Four new species of Cucujomyces (Laboulbeniales) parasitic on Leiodidae (Coleoptera) from Chile are described and illustrated: Cucujomyces dasypelatis on Dasypelates nebulosus, C. gratiellae on Hydnodietus brunneus, C. neohydnobii on Neohydnobius argentinicus, and C. newtonii on Metahydnobius spp. The new taxa are compared with other known species of Cucujomyces. Morphological variation encountered in one of the new species, C. gratiellae, encompasses attributes of both Cucujomyces and Balazucia, necessitating Balazucia to be placed in synonymy under Cucujomyces. On the basis of this, two new combinations, Cucujomyces bilateralis and C. japonicus, are proposed.


Paddlefish Egg Deposition In The Lower Yellowstone River, Montana And North Dakota, Shannon E. Miller, Dennis L. Scarnecchia, Steven R. Fain Aug 2008

Paddlefish Egg Deposition In The Lower Yellowstone River, Montana And North Dakota, Shannon E. Miller, Dennis L. Scarnecchia, Steven R. Fain

The Prairie Naturalist

We used passive egg collectors during May, June, and July of2003 and 2004 in the lower 50 river kiiometers (rkm) of the Yellowstone River, eastern Montana and western North Dakota, to detect egg deposition by spawning paddle fish (Polyodon spathula). Sampling yielded 292 eggs (46 in 2003 and 246 in 2004). All egg collections in 2003 occurred on the descending limb of the spring hydrograph but 99% of egg collections in 2004 occurred before the spring hydrograph began to descend. Catch-per-unit-effort (CPUE) in 2004 was about four times that of 2003. A combination of river conditions, in addition …


Fish Distributions And Nutrient Cycling In Streams: Can Fish Create Biogeochemical Hotspots, Peter B. Mcintyre, Alexander S. Flecker, Michael J. Vanni, James M. Hood, Brad W. Taylor, Steven A. Thomas Aug 2008

Fish Distributions And Nutrient Cycling In Streams: Can Fish Create Biogeochemical Hotspots, Peter B. Mcintyre, Alexander S. Flecker, Michael J. Vanni, James M. Hood, Brad W. Taylor, Steven A. Thomas

Dartmouth Scholarship

Rates of biogeochemical processes often vary widely in space and time, and characterizing this variation is critical for understanding ecosystem functioning. In streams, spatial hotspots of nutrient transformations are generally attributed to physical and microbial processes. Here we examine the potential for heterogeneous distributions of fish to generate hotspots of nutrient recycling. We measured nitrogen (N) and phosphorus (P) excretion rates of 47 species of fish in an N-limited Neotropical stream, and we combined these data with population densities in each of 49 stream channel units to estimate unit- and reach-scale nutrient recycling. Species varied widely in rates of N …


Mitochondrial Genomes Reveal An Explosive Radiation Of Extinct And Extant Bears Near The Miocene-Pliocene Boundary, Johannes Krause, Tina Unger, Aline Nocon, Anna-Sapfo Malaspinas, Sergios-Orestis Kolokotronis, Mathias Stiller, Leopoldo Soibelzon, Helen Spriggs, Paul H. Dear, Adrian W. Briggs, Sarah C. E. Bray, Stephen J. O'Brien, Gernot Rabeder, Paul Matheus, Alan Cooper, Montgomery Slatkin, Svante Paabo, Michael Hofreiter Jul 2008

Mitochondrial Genomes Reveal An Explosive Radiation Of Extinct And Extant Bears Near The Miocene-Pliocene Boundary, Johannes Krause, Tina Unger, Aline Nocon, Anna-Sapfo Malaspinas, Sergios-Orestis Kolokotronis, Mathias Stiller, Leopoldo Soibelzon, Helen Spriggs, Paul H. Dear, Adrian W. Briggs, Sarah C. E. Bray, Stephen J. O'Brien, Gernot Rabeder, Paul Matheus, Alan Cooper, Montgomery Slatkin, Svante Paabo, Michael Hofreiter

Biology Faculty Articles

Background: Despite being one of the most studied families within the Carnivora, the phylogenetic relationships among the members of the bear family (Ursidae) have long remained unclear. Widely divergent topologies have been suggested based on various data sets and methods.

Results: We present a fully resolved phylogeny for ursids based on ten complete mitochondrial genome sequences from all eight living and two recently extinct bear species, the European cave bear (Ursus spelaeus) and the American giant short-faced bear (Arctodus simus). The mitogenomic data yield a well-resolved topology for ursids, with the sloth bear at the basal …


Wpa News 81 (2008), World Pheasant Association Jul 2008

Wpa News 81 (2008), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (Summer 2008), number 81

Published by the World Pheasant Association


Endangered Species Bulletin – Summer 2008, Volume 33, No. 2 Jul 2008

Endangered Species Bulletin – Summer 2008, Volume 33, No. 2

Endangered Species Bulletin

Table of Contents:
Restoring a Vital Partnership
Apache Leader Promotes Tribal Conservation Rights
A Shared Responsibility
Tribal Wildlife Grants
Hoopa Tribe Leads in Fisher Conservation
Restoring Endangered Species on the Pueblo of Santa Ana
Penobscot Indian Nation Aids River Restoration
Traditional Ecological Knowledge
The Fox People Care for a Rabbit
Mill Creek Restoration Project Departments
Partners for Pollinators
Partners for Fish and Wildlife
Focus on Hatcheries
USGS Research News
Children in Nature
Listing Actions


Guidelines For Re-Establishing Grey Partridges Through Releasing, Francis Buner, N. J. Aebischer Jul 2008

Guidelines For Re-Establishing Grey Partridges Through Releasing, Francis Buner, N. J. Aebischer

Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials

In the UK, numbers of grey partridges have declined by over 75% during the last 20 years, and in many parts of the country the species has become locally extinct. Concerns over the magnitude of the decline led the UK Government to place the species on the short list of the UK Biodiversity Action Plan (BAP) for which the Game & Wildlife Conservation Trust was appointed lead partner in 1996. The Grey Partridge Species Action Plan’s targets are to restore numbers from 65,000 pairs in 2005 to 90,000 pairs nationally by 2010, and to expand its 1990 range. Over the …


Slides: The Big Questions, Doug Kenney Jun 2008

Slides: The Big Questions, Doug Kenney

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Doug Kenney, Natural Resources Law Center, University of Colorado Law School

7 slides


Slides: The Urbanizing West: Limits To Water, Limits To Growth, Lora A. Lucero Jun 2008

Slides: The Urbanizing West: Limits To Water, Limits To Growth, Lora A. Lucero

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Lora A. Lucero, AICP, American Planning Association

18 slides


Slides: Protecting Biodiversity Through Ecosystem Services, Barton "Buzz" Thompson Jun 2008

Slides: Protecting Biodiversity Through Ecosystem Services, Barton "Buzz" Thompson

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Barton “Buzz” Thompson, Perry L. McCarty Director, Woods Institute for the Environment, Stanford University Law School

14 slides


Bridging The Governance Gap: Strategies To Integrate Water And Land Use Planning, Sarah Bates Van De Wetering, University Of Montana (Missoula). Public Policy Research Institute Jun 2008

Bridging The Governance Gap: Strategies To Integrate Water And Land Use Planning, Sarah Bates Van De Wetering, University Of Montana (Missoula). Public Policy Research Institute

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

16 pages.

Includes bibliographical references

"2007"

"Collaborative Governance Report 2"


Slides: Adapting Western Water Policy For Resilience Under Climate Change, Bonnie G. Colby Jun 2008

Slides: Adapting Western Water Policy For Resilience Under Climate Change, Bonnie G. Colby

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Dr. Bonnie G. Colby, Professor of Resource Economics & Hydrology, University of Arizona Department of Agriculture & Resource Economics

22 slides


Slides: Linking Growth, Land Use And Water, Jim Holway Jun 2008

Slides: Linking Growth, Land Use And Water, Jim Holway

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Jim Holway, Global Institute of Sustainability, Civil and Environmental Engineering, Arizona Water Institute, Arizona State University

29 slides


Slides: Beyond Rethinking: Redoing Western Water Law, Janet Neuman Jun 2008

Slides: Beyond Rethinking: Redoing Western Water Law, Janet Neuman

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Professor Janet Neuman, Lewis & Clark Law School

17 slides


Slides: Threats To Biological Diversity: Global, Continental, Local, J. Michael Scott Jun 2008

Slides: Threats To Biological Diversity: Global, Continental, Local, J. Michael Scott

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: J. Michael Scott, U.S. Geological Survey, Idaho Cooperative Fish and Wildlife Research Unit, University of Idaho

38 slides


Slides: Rethinking Western Water Law: Whatever Happened To The Public Interest?, Mark Squillace Jun 2008

Slides: Rethinking Western Water Law: Whatever Happened To The Public Interest?, Mark Squillace

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Mark Squillace, Director, Natural Resources Law Center, University of Colorado Law School

15 slides


Slides: Global Warming And The Endangered Species Act, Kieran Suckling Jun 2008

Slides: Global Warming And The Endangered Species Act, Kieran Suckling

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Kieran Suckling, Center for Biological Diversity

15 slides


Rethinking Western Water Law: Instream Flows, Reed D. Benson Jun 2008

Rethinking Western Water Law: Instream Flows, Reed D. Benson

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Reed D. Benson, University of New Mexico School of Law

1 page.