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Articles 1 - 30 of 277
Full-Text Articles in Ecology and Evolutionary Biology
Lake Mead National Recreation Area Monitoring And Evaluation Of Sensitive Wildlife: Quarterly Progress Report, Period Ending December 31, 2008, Margaret N. Rees
Lake Mead National Recreation Area Monitoring And Evaluation Of Sensitive Wildlife: Quarterly Progress Report, Period Ending December 31, 2008, Margaret N. Rees
Wildlife Monitoring
Project 1. Relict Leopard Frog Monitoring, Management, and Research
- All milestones and deliverables associated with the MSHCP project are on schedule
- Completion of 2008 monitoring survey efforts
- Coordination is ongoing to identify potential translocation sites, including assisting efforts to identify a potential site in the western Grand Canyon
- RLFCT meeting hosted and minutes of meeting drafted
- Annual report provided to RLFCT, final draft in review
- Sampling for the amphibian chytrid fungus conducted at many sites
Project 2. Bald Eagle Winter Monitoring and Evaluation
- All MSHCP milestones and deliverables are on schedule
- Planning and coordination of the 2009 Eagle Count conducted …
Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, October 1, 2008 To December 31, 2008, Margaret N. Rees
Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, October 1, 2008 To December 31, 2008, Margaret N. Rees
Vegetation Monitoring
Executive Summary
- The Weed Sentry program surveyed over 62 miles of federal land by vehicle and foot in Clark County for incipient populations of exotic plants.
- New weed monitoring botanists and botany assistant joined the staff during this period.
- Vegetation staff presented four presentations at the Natural Areas Association annual conference in Nashville, TN and eight poster presentations at the “wildfires and invasive plants in American deserts” meeting in Reno, NV.
- Several new Brassica tournefortii experiments were initiated.
Joint Fire Science Program – Lake Mead National Recreation Area: Revegetating Burned Arid Lands: Identifying Successful Native Species Using Trait And Competition Analysis, Quarterly Progress Report, October 1 — December 31, 2008, Margaret N. Rees
Fire Science
• Presented poster at Natural Areas Conference in Nashville, TN
• Initiated granivory study at Goodsprings.
• Outplanted 2376 plants for Experiment 1 at Lake Mead nursery.
• Presented poster at Wildfires and Invasive Plants in American Deserts conference in Reno, NV.
• Submitted manuscript covering our distance from road - microsite invasibility study to Journal of Arid Environments.
Limnological Assistance For The Lake Mead National Recreation Area In Meeting The Challenge Of The Water 2025 Initiative: Quarterly Report, Period Ending December 31, 2008, Margaret N. Rees
Limnological Studies
Project 1: Technical input has been provided at four advisory team meetings attended this quarter.
Project 2: A formal report titled, Surface Water Monitoring for Indicator Bacteria in High-use Sites of the Lake Mead National Recreation Area, has been prepared; an accompanying poster presentation for the Lake Mead Science Symposium is in preparation.
Project 3: A draft document titled, “Interagency Monitoring Action Plan (I-MAP): Quagga Mussels in Lakes Mead and Mohave” has been presented to an interagency core group to review and input. Six oral presentations related to quagga mussels are in preparation by this group for the Lake Mead …
Applying Marine Protected Area Design Models In Large Estuarine Systems, Roman Zajac, Amanda E. Neely
Applying Marine Protected Area Design Models In Large Estuarine Systems, Roman Zajac, Amanda E. Neely
Biology and Environmental Science Faculty Publications
Several types of design models are currently being used to develop marine protected areas (MPAs) for conservation of coastal and pelagic ecosystems. However, few studies have applied these models in large estuaries which have unique characteristics that need to be considered in MPA design, including strong physical, chemical and biological gradients and significant human impacts. We explored how one design model, MARXAN, can be applied to estuarine systems by developing MPA design scenarios for Long Island Sound, an estuary in the northeastern USA. Using sedimentary texture as a proxy for habitats, we modeled and tested several scenarios where conservation goals …
Early Post-Fire Recovery On A Heavily Visited Mojave Desert Burn: Red Rock Canyon Near Las Vegas, Nevada, Scott R. Abella, E. Cayenne Engel, Christina L. Lund, Jessica E. Spencer
Early Post-Fire Recovery On A Heavily Visited Mojave Desert Burn: Red Rock Canyon Near Las Vegas, Nevada, Scott R. Abella, E. Cayenne Engel, Christina L. Lund, Jessica E. Spencer
Fire Science Presentations
Wildfire has become widespread in southwestern USA deserts. In a record 2005 fire season in the Mojave Desert, for example, more than 385,000 hectares burned (Brooks and Matchett 2006). This burned area is approximately 3% of the entire Mojave Desert. Fueled in large part by exotic annual grasses, these fires burned desert ecosystems thought to have only burned infrequently historically. Burns now occupy significant portions of desert landscapes, posing prominent management challenges. Improving our understanding of plant recovery on desert burns is important for evaluating future fire hazard, whether natural revegetation will meet management objectives, and for planning active revegetation …
Using A Diverse Seed Mix To Establish Native Plants On A Sonoran Desert Burn, Scott R. Abella, John L. Gunn, Mark L. Daniels, Judith D. Springer, Susan E. Nyoka
Using A Diverse Seed Mix To Establish Native Plants On A Sonoran Desert Burn, Scott R. Abella, John L. Gunn, Mark L. Daniels, Judith D. Springer, Susan E. Nyoka
Fire Science Presentations
- Revegetating burned areas is a formidable challenge facing resource managers in southwestern United States arid lands.
- Natural revegetation of desert burns by native species may be slow, or dominated by exotic annual grasses that perpetuate a frequent-fire regime.
- Resource managers may have several reasons for actively revegetating burns with native species, such as for providing competition with exotic species, minimizing soil erosion and dust pollution, and improving aesthetics.
- The use of native species in revegetation has been limited by a lack of available seed and by findings that native desert species are difficult to establish (e.g., Bainbridge and Virginia 1990, …
Post-Fire Plant Recovery In The Mojave And Sonoran Deserts Of Western North America, Scott R. Abella, Public Lands Institute, Department Of Environmental Studies, University Of Nevada, Las Vegas
Post-Fire Plant Recovery In The Mojave And Sonoran Deserts Of Western North America, Scott R. Abella, Public Lands Institute, Department Of Environmental Studies, University Of Nevada, Las Vegas
Fire Science Presentations
Fire is thought to have been generally rare historically in the Mojave and Sonoran Deserts. However, invasion by exotic grasses (e.g., Schismus spp.) has increased fuel continuity, promoting fire in these deserts. Succession and recovery are not well understood processes in deserts, nonetheless for a novel disturbance like fire. In addition to helping build theories of desert succession and recovery, information on post-fire recovery has numerous practical implications (e.g., determining whether active revegetation is needed). Systematic reviews provide a means for obtaining literature using reproducible search criteria. This approach facilitates a balanced appraisal of available information, synthesizes scattered literature, and …
Distribution Patterns Of Sciurus Niger (Eastern Fox Squirrel) Leaf Nests Within Woodlots Across A Suburban/Urban Landscape, Carmen M. Salsbury
Distribution Patterns Of Sciurus Niger (Eastern Fox Squirrel) Leaf Nests Within Woodlots Across A Suburban/Urban Landscape, Carmen M. Salsbury
Scholarship and Professional Work - LAS
To determine habitat characteristics that influence Sciurus niger (Eastern Fox Squirrel) abundance and distribution within a suburban/urban landscape in the midwestern United States, I documented the density and placement of fox squirrel leaf nests in 20 woodlots in the Indianapolis metropolitan area, Marion County, IN. The woodlots varied in size (0.94 to 19.5 ha), approximate age, shape, and degree of isolation from other woodlots and suitable squirrel habitat in the surrounding area. Only 8.0% of nests were located in a tree with another nest, and nests were randomly distributed in all but one woodlot, where they were uniformly dispersed. Nest …
Geographic Variation In Malarial Parasite Lineages In The Common Yellowthroat (Geothlypis Trichas), K. M. Pagenkopp, John Klicka, K. L. Durrant, J. C. Garvin, R. C. Fleischer
Geographic Variation In Malarial Parasite Lineages In The Common Yellowthroat (Geothlypis Trichas), K. M. Pagenkopp, John Klicka, K. L. Durrant, J. C. Garvin, R. C. Fleischer
Ornithology Program (HRC)
Our current understanding of migration routes of many birds is limited and researchers have employed various methods to determine migratory patterns. Recently, parasites have been used to track migratory birds. The objective of this study was to determine whether haemosporidian parasite lineages detect significant geographic structure in common yellowthroats (Geothlypis trichas). We examined liver tissue or blood from 552 birds sampled from multiple locations throughout the continental United States, southern Canada, and the Bahamas. We found a 52.7% overall prevalence of haematozoan infection. We identified 86.1% of these infections to genus: 81% were Plasmodium; 5% were Haemoproteus …
Biological Invasions And Biocultural Diversity: Linking Ecological And Cultural Systems, Jeanine Pfeiffer, Robert Voeks
Biological Invasions And Biocultural Diversity: Linking Ecological And Cultural Systems, Jeanine Pfeiffer, Robert Voeks
Faculty Publications
Study of the ecological and economic effects of invasive species has paralleled their progressively pervasive influence worldwide, yet their cultural impacts remain largely unexamined and therefore unrecognized. Unlike biological systems, where the ecological consequences of biological invasions are primarily negative, from an ethnoscientific standpoint, invasive species' impacts on cultural systems span a range of effects. Biological invasions affect cultural groups in myriad, often unpredictable and at times contradictory ways. This review groups case studies into a conceptual matrix suggesting three categorically different cultural impacts of invasive species. Culturally impoverishing invasive species precipitate the loss or replacement of culturally important native …
Effects Of Olfactory And Visual Predators On Nest Success And Nest-Site Selection Of Waterfowl In North Dakota, Jennifer Borgo
Effects Of Olfactory And Visual Predators On Nest Success And Nest-Site Selection Of Waterfowl In North Dakota, Jennifer Borgo
Green Canyon Environmental Research Area, Logan Utah
No abstract provided.
Individuals And Populations: How Biology's Theory And Data Have Interfered With The Integration Of Development And Evolution, David S. Moore
Individuals And Populations: How Biology's Theory And Data Have Interfered With The Integration Of Development And Evolution, David S. Moore
Pitzer Faculty Publications and Research
Research programs in quantitative behavior genetics and evolutionary psychology have contributed to the widespread belief that some psychological characteristics can be “inherited” via genetic mechanisms. In fact, molecular and developmental biologists have concluded that while genetic factors contribute to the development of all of our traits, non-genetic factors always do too, and in ways that make them no less important than genetic factors. This insight demands a reworking of the Modern Evolutionary Synthesis, a theory that defined evolution as a process involving changes in the frequencies of genes in populations, and that envisioned no role for experiential factors now known …
The Role Of Causal Processes In The Neutral And Nearly Neutral Theories, Michael R. Dietrich, Roberta L. Millstein
The Role Of Causal Processes In The Neutral And Nearly Neutral Theories, Michael R. Dietrich, Roberta L. Millstein
Dartmouth Scholarship
The neutral and nearly neutral theories of molecular evolution are sometimes characterized as theories about drift alone, where drift is described solely as an outcome, rather than a process. We argue, however, that both selection and drift, as causal processes, are integral parts of both theories. However, the nearly neutral theory explicitly recognizes alleles and/or molecular substitutions that, while engaging in weakly selected causal processes, exhibit outcomes thought to be characteristic of random drift. A narrow focus on outcomes obscures the significant role of weakly selected causal processes in the nearly neutral theory.
Preliminary Analysis Of The Ecology And Geography Of The Asian Nuthatches (Aves: Sittidae), Shaily Menon, Zafar-Ul Islam, Jorge Soberon, A. Townsend Peterson
Preliminary Analysis Of The Ecology And Geography Of The Asian Nuthatches (Aves: Sittidae), Shaily Menon, Zafar-Ul Islam, Jorge Soberon, A. Townsend Peterson
Peer Reviewed Publications
We explored distributions of Asian nuthatch species in ecological and geographic space using ecological niche modeling based on occurrence data associated with specimens and observations. Nuthatches represent a well-defined clade occurring throughout the Northern Hemisphere, but are most diverse in southern Asia where 15 of the 24 species occur and where the lineage is believed to have evolved. Species richness was focused in a narrow east-west band corresponding to the forested parts of the Himalayas with a maximum number of nine species predicted present in these foci. The distributional predictions have a mid-elevation focus with highest species diversity between 1,000 …
Faecal-Centric Approaches To Wildlife Ecology And Conservation; Methods, Data And Ethics, C. T. Darimont, T. E. Reimchen, H. M. Bryan, P. C. Paquet
Faecal-Centric Approaches To Wildlife Ecology And Conservation; Methods, Data And Ethics, C. T. Darimont, T. E. Reimchen, H. M. Bryan, P. C. Paquet
Ethics and Conservation Biology Collection
Abundant and commonly encountered in the field, wildlife faeces have long attracted scientists. Recent advances in molecular techniques, however, especially when coupled with creative study designs, can now yield a great variety of high quality data. Herein, we review the opportunities and challenges of faecal-centric approaches to address ecological and conservation questions using wolves of coastal British Columbia, Canada, as a case system. We begin by discussing methodological considerations, which should have broad applicability to any wildlife study system. We then summarize the extensive and unique variety of data that has emerged from our ‘facts from faeces’ approach with wolves, …
Food Resources Of Carnaby’S Black-Cockatoo (Calyptorhynchus Latirostris) In The Gnangara Sustainability Strategy Study Area, Leonie E. Valentine, William Stock
Food Resources Of Carnaby’S Black-Cockatoo (Calyptorhynchus Latirostris) In The Gnangara Sustainability Strategy Study Area, Leonie E. Valentine, William Stock
Research outputs pre 2011
Carnaby’s Black-Cockatoo is an endangered species, with less than 50% of the original population remaining (Garnett and Crowley 2000). A major threatening process includes habitat fragmentation and the removal of critical feeding resources (Cale 2003). The GSS study area in an important foraging area during the non-breeding season for Carnaby’s Black-Cockatoo. Both native banksia woodlands and pine plantations have been recognised as an important food resource (Perry 1948; Saunders 1974b; Saunders 1980). Expanding urban populations and agricultural development has resulted in the removal of approximately 50% of native vegetation in the GSS study area. Within the remnant vegetation, the energetics, …
Unintended Facilitation Between Marine Consumers Generates Enhanced Mortality For Their Shared Prey, F. Joel Fodrie, Matthew D. Kenworthy, Sean P. Powers
Unintended Facilitation Between Marine Consumers Generates Enhanced Mortality For Their Shared Prey, F. Joel Fodrie, Matthew D. Kenworthy, Sean P. Powers
University Faculty and Staff Publications
We manipulated predator densities and prey vulnerability to explore how interactions between two predators affect overall mortality of their shared prey. Our threemember study system included eastern oysters (Crassostrea virginica) and two of its major consumers: southern oyster drills (Stramonita haemastoma) and stone crabs (Menippe adina). Field experiments demonstrated that drills and crabs foraging together generated higher than expected oyster mortality based on each species operating independently, even though crabs also killed some drills. In subsequent laboratory trials, we experimentally mimicked the handling of oysters by foraging crabs and confirmed that crabs facilitated drills by breeching oyster valves, thereby granting …
How Does A Riverine Setting Affect The Lifestyle Of Shellmound Builders In Brazil?, Sabine Eggers, C. C. Petronilho, K. Brandt, C. Jericó-Daminello, J. Filippini, Karl Reinhard
How Does A Riverine Setting Affect The Lifestyle Of Shellmound Builders In Brazil?, Sabine Eggers, C. C. Petronilho, K. Brandt, C. Jericó-Daminello, J. Filippini, Karl Reinhard
Karl Reinhard Publications
The contact of inland and coastal prehistoric groups in Brazil is believed to have been restricted to regions with no geographical barrier, as is the case in the Ribeira de Iguape valley. The inland osteological collection from the riverine shellmound Moraes (5800–4500 BP) represents a unique opportunity to test this assumption for this region. Despite cultural similarities between riverine and coastal shellmounds, important ecological and site distribution differences are expected to impact on lifestyle. The purpose of this study is thus to document and interpret health and lifestyle indicators in Moraes in comparison to coastal shellmound groups. Specifically we test …
Rui: The Role Of Dissolved Organic Material In Regulating Primary Production In Prairie Saline Lakes, Jasmine E. Saros
Rui: The Role Of Dissolved Organic Material In Regulating Primary Production In Prairie Saline Lakes, Jasmine E. Saros
University of Maine Office of Research Administration: Grant Reports
Grasslands and converted grasslands (i.e. agricultural land) cover extensive areas in semi-arid regions of the world. Lakes situated in grasslands are usually saline and have high concentrations of dissolved organic matter (DOM). We hypothesize that DOM plays a critical role in regulating algal production in prairie saline lakes by binding nutrients and making them less available to algae. To explore this hypothesis, we will survey a suite of chemical and biological parameters in lakes from three areas in the central and northern Great Plains (ND, SD, NE). A series of experiments will be conducted in Years 2 and 3 to …
Grades 9-10 Energy Sources, Roxana Estrada
Grades 9-10 Energy Sources, Roxana Estrada
Science
This is a science lesson for students in ninth and tenth grade on Energy Sources that can be used in an ecology class. Through this lesson students will be able to make decisions and acknowledge that that their activities had a profound impact on the physical and living environment and students will be able to explain the most common energy sources. Students will be tiered by ability and within their groups they will choose between two topics based on interest.
Lifestyle Of Shellmound Builders In Brazil (Galley Proofs), Sabine Eggers, C. C. Petronilho, K. Brandt, J. Filippini, Karl J. Reinhard
Lifestyle Of Shellmound Builders In Brazil (Galley Proofs), Sabine Eggers, C. C. Petronilho, K. Brandt, J. Filippini, Karl J. Reinhard
School of Natural Resources: Faculty Publications
The contact of inland and coastal prehistoric groups in Brazil is believed to have been restricted to regions with no geographical barrier, as is the case in the Ribeira de Iguape valley. The inland osteological collection from the riverine shellmound Moraes (5800–4500 BP) represents a unique opportunity to test this assumption for this region. Despite cultural similarities between riverine and coastal shellmounds, important ecological and site distribution differences are expected to impact on lifestyle. The purpose of this study is thus to document and interpret health and lifestyle indicators in Moraes in comparison to coastal shellmound groups. Specifically we test …
Spots Of Adult Male Red-Spotted Newts Are Redder And Brighter Than In Females: Evidence For A Role In Mate Selection?, Andrew K. Davis, Kristine L. Grayson
Spots Of Adult Male Red-Spotted Newts Are Redder And Brighter Than In Females: Evidence For A Role In Mate Selection?, Andrew K. Davis, Kristine L. Grayson
Biology Faculty Publications
As aquatic adults, eastern red-spotted newts (Notophthalmus v. viridescens) are generally green with two rows of dorsal spots, which vary in number between individuals and range in colour from orange to red. The function of these spots is unknown, but it is possible that they serve as sexual ornamentations and we examined this hypothesis by testing for sexual dimorphism in spot characteristics. We used an image analysis approach that has been used previously with this and other amphibian species to compare the number, size and colour – redness (hue score) and brightness – of spots in 100 male …
Adaptive Management Report For The Clark County, Nevada Multiple Species Habitat Conservation Plan, Desert Conservation Program
Adaptive Management Report For The Clark County, Nevada Multiple Species Habitat Conservation Plan, Desert Conservation Program
Publications (C)
The Desert Conservation Program administers an incidental take permit for desert tortoise and 77 other species. The permit was issued in 2001 by the United States Fish and Wildlife Service in accordance with the Endangered Species Act. Compliance with the permit requires implementation of the Clark County Multiple Species Habitat Conservation Plan. This plan requires an adaptive management program and a biennial report by an independent science advisor to assess the status of the plan and make recommendations for future funding. The 2008 Adaptive Management Report reviews current data on land use trends, habitat loss, species status, plan implementation, programmatic …
Abiotic Controls On The Tropic Status Of Oligotrophic Water, Stephen A. Norton
Abiotic Controls On The Tropic Status Of Oligotrophic Water, Stephen A. Norton
University of Maine Office of Research Administration: Grant Reports
This research will investigate how the elements aluminum (Al) and phosphorus (P), both originally from soil, interact in water moving through soil pores to downstream lakes in ways that prevent P from being biologically available to algae in surface waters. This causes oligotrophic conditions (i.e., water with very low nutrient concentrations). Solid aluminum hydroxide will adsorb and can permanently capture P from the water if the acidity is low. Changes in the acidity of surface waters from "acid rain", climate change, or other factors should induce changes in the interaction between Al and P, and thus changes in the biological …
The Lobster Bulletin, Fall 2008, Lobster Institute, University Of Maine
The Lobster Bulletin, Fall 2008, Lobster Institute, University Of Maine
Lobster Bulletin
The Lobster Bulletin newsletter includes research updates, and information on lobsters and the lobster industry. The Lobster Institute at the University of Maine is dedicated to protecting and conserving the lobster resource, and enhancing lobstering as an industry and a way of life.
Headlines in the Fall 2008 Special Edition announcing the MTAF Challenge issue include:
- The MTAF Challenge
- Heannsler Family Helps to Meet MTAF Challenge
- Research Report: Gifts of Property: How they work and How They Can Benefit the Donor
- Basil & Harriet Heannsler Help the Lobster Institute Meet the MTAF Challenge With a Gift of Property
Familiarity With Breeding Habitat Improves Daily Survival In Colonial Cliff Swallows, Charles R. Brown, Mary Bomberger Brown, Kathleen R. Brazeal
Familiarity With Breeding Habitat Improves Daily Survival In Colonial Cliff Swallows, Charles R. Brown, Mary Bomberger Brown, Kathleen R. Brazeal
School of Natural Resources: Faculty Publications
One probable cost of dispersing to a new breeding habitat is unfamiliarity with local conditions such as the whereabouts of food or the habits of local predators, and consequently immigrants may have lower probabilities of survival than more experienced residents. Within a breeding season, estimated daily survival probabilities of cliff swallows, Petrochelidon pyrrhonota, at colonies in southwestern Nebraska, USA, were highest for birds that had always nested at the same site, followed by those for birds that had nested there in some (but not all) past years. Daily survival probabilities were lowest for birds that were naive immigrants to …
When To Be A Dear Enemy: Flexible Acoustic Relationships Of Neighbouring Skylarks, Alauda Arvensis, Elodie Briefer, Fanny Rybak, Thierry Aubin
When To Be A Dear Enemy: Flexible Acoustic Relationships Of Neighbouring Skylarks, Alauda Arvensis, Elodie Briefer, Fanny Rybak, Thierry Aubin
Ethology Collection
Numerous territorial species are less aggressive towards neighbours than strangers. This tolerance towards neighbouring conspecifics, termed the ‘dear enemy’ effect, seems to be a flexible feature of the relationship between neighbours, and has been shown to disappear in some species after experimental or natural modifications of the context. However, the maintenance over time of this singular relationship has been poorly studied. In this study, we followed the change of dear enemy relationships during the breeding season in a territorial songbird with a complex song, the skylark. We examined in the field the response of territory owners to playbacks of neighbour …
Red-Cockaded Woodpeckers And Hurricanes, Zoe Hoyle
Red-Cockaded Woodpeckers And Hurricanes, Zoe Hoyle
Faculty Publications
No abstract provided.
Mojave Applied Ecology Notes Fall 2008, Alice Miller, Joshua Hoines, Scott R. Abella
Mojave Applied Ecology Notes Fall 2008, Alice Miller, Joshua Hoines, Scott R. Abella
Mojave Applied Ecology Notes
Effects of wildfires in Joshua Tree National Park, Blackbrush masting volunteer seed collection effort, new book chapter on Mojave revegetation, Natural Areas Association presentations.