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2014

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Articles 241 - 270 of 621

Full-Text Articles in Ecology and Evolutionary Biology

Book Review: The Iowa Lakeside Laboratory: A Century Of Discovering The Nature Of Nature. Michael J. Lannoo., Bonnie S. Bowen Jun 2014

Book Review: The Iowa Lakeside Laboratory: A Century Of Discovering The Nature Of Nature. Michael J. Lannoo., Bonnie S. Bowen

The Prairie Naturalist

Iowa Lakeside Laboratory (a.k.a. Lakeside Lab) is one of several biological field stations that were established in the early 1900s and that have active educational and research programs today. Michael Lannoo’s account of the history of Lakeside Lab was initiated at the centennial celebration of the lab in 2009. Lannoo’s own connection with Iowa Lakeside Laboratory began as a student at Iowa State University and continues today as a member of the Lakeside Lab summer faculty and as Associate Director of Academics and Research. In his book, Lannoo describes field stations, and Lakeside Lab in particular, as educational institutions that …


Book Reviews: Video Surveillance Of Nesting Birds. Edited By Christine A. Ribic, Frank R. Thompson Iii, And Pamela J. Pietz., Marissa A. Ahlering Jun 2014

Book Reviews: Video Surveillance Of Nesting Birds. Edited By Christine A. Ribic, Frank R. Thompson Iii, And Pamela J. Pietz., Marissa A. Ahlering

The Prairie Naturalist

Observations and studies of nests have been a central component of ornithology since its inception. Until recently, studies of nesting ecology were limited to human observation, making some types of information nearly impossible to obtain, such as nocturnal behavior, or difficult to study with adequate sample sizes, such as provisioning behaviors or cause of nest failure. The use of video photography to study the nesting biology of birds has exploded in the past decade, and the most recent volume of Studies in Avian Biology, Video Surveillance of Nesting Birds, has done a nice job of summarizing the history of camera …


Mate Replacement And Alloparental Care In Ferruginous Hawk (Buteo Regalis), Shubham Datta, Will M. Inselman, Jonathan A. Jenks, Kent C. Jensen, Christopher C. Swanson, Robert W. Klaver, Indrani Sasmal, Troy W. Grovenburg Jun 2014

Mate Replacement And Alloparental Care In Ferruginous Hawk (Buteo Regalis), Shubham Datta, Will M. Inselman, Jonathan A. Jenks, Kent C. Jensen, Christopher C. Swanson, Robert W. Klaver, Indrani Sasmal, Troy W. Grovenburg

The Prairie Naturalist

Alloparental care (i.e., care for unrelated offspring) has been documented in various avian species (Maxson 1978, Smith et al. 1996, Tella et al. 1997, Lislevand et al. 2001, Literak and Mraz 2011). A male replacement mate that encounters existing broods has options, which include alloparental care or infanticide. Infanticide may be beneficial in some species (Rohwer 1986, Kermott et al. 1990), but in long-lived avian species, like the ferruginous hawk (Buteo regalis) that do not renest within a season, infanticide might be detrimental. Adoption and rearing success likely provide direct evidence of competence of replacement mates as potential parents for …


Multi-Scale Habitat Use Of Male Ruffed Grouse In The Black Hills National Forest, Cassandra L. Mehls, Kent C. Jensen, Mark A. Rumble, Michael C. Wimberly Jun 2014

Multi-Scale Habitat Use Of Male Ruffed Grouse In The Black Hills National Forest, Cassandra L. Mehls, Kent C. Jensen, Mark A. Rumble, Michael C. Wimberly

The Prairie Naturalist

Ruffed grouse (Bonasa umbellus) are native upland game birds and a management indicator species (MIS) for aspen (Populus tremuloides) in the Black Hills National Forest (Black Hills). Our objective was to assess resource selection of male ruffed grouse to identify the most appropriate scale to manage for aspen and ruffed grouse in the Black Hills. During spring 2007 and 2008, we conducted drumming surveys throughout the central and northern Black Hills to locate used and unused sites from which we compared habitat characteristics at increasing spatial scales. Aspen with >70% overstory canopy cover (OCC) was important to the occurrence of …


Making Nature Whole: A History Of Ecological Restoration. William R. Jordan Iii And George M. Lubick., Daryl D. Smith Jun 2014

Making Nature Whole: A History Of Ecological Restoration. William R. Jordan Iii And George M. Lubick., Daryl D. Smith

The Prairie Naturalist

Ecological restoration—the process of assisting the recovery of ecosystems that have been degraded, damaged, or destroyed—is being incorporated into the fabric of our society. The practice of ecological restoration of natural areas developed and grew in the twentieth century in response to widespread human disturbance of natural communities. Undoubtedly, this type of restoration will continue to increase in importance in the coming decades given the extensive alteration of ecosystems that is occurring and that is showing no signs of abating.

As indicated in the promotional material for Making Nature Whole, Jordan and Lubick have provided a seminal publication for the …


Notes: Bed-Site Selection By Neonatal White-Tailed Deer In Central North Dakota, Brian A. Schaffer, Jonathan A. Jenks, Troy W. Grovenburg, William F. Jensen Jun 2014

Notes: Bed-Site Selection By Neonatal White-Tailed Deer In Central North Dakota, Brian A. Schaffer, Jonathan A. Jenks, Troy W. Grovenburg, William F. Jensen

The Prairie Naturalist

Understanding bed-site selection and vegetation characteristics provides valuable information for population management (Verme 1977, Huegel et al. 1985a, Nelson and Woolf 1987). Predation and other natural-caused mortalities of white-tailed deer (Odocoileus virginianus) neonates are most likely to occur within the first 60 days of life; a time period when selected habitat characteristics are vital to survival (Verme 1977, Hue- gel et al. 1985a, Nelson and Woolf 1987, Grovenburg et al. 2010). Prior to the study of Grovenburg et al. (2010), limited research had been completed on the bed-site selection of neonatal white-tailed deer in the grasslands of the Northern Great …


Paleoparasitological Studies On Mummies Of The Joseon Dynasty, Korea, Min Seo, Adauto Araújo, Karl J. Reinhard, Jong Yil Chai, Dong Hoon Shin Jun 2014

Paleoparasitological Studies On Mummies Of The Joseon Dynasty, Korea, Min Seo, Adauto Araújo, Karl J. Reinhard, Jong Yil Chai, Dong Hoon Shin

Karl Reinhard Publications

Paleoparasitology is the application of conventional or molecular investigative techniques to archeological samples in order to reveal parasitic infection patterns among past populations. Although pioneering studies already have reported key paleoparasitological findings around the world, the same sorts of studies had not, until very recently, been conducted in sufficient numbers in Korea. Mummified remains of individuals dating to the Korean Joseon Dynasty actually have proved very meaningful to concerned researchers, owing particularly to their superb preservation status, which makes them ideal subjects for paleoparasitological studies. Over the past several years, our study series on Korean mummies has yielded very pertinent …


Temporal Variations In The Abundance And Composition Of Biofilm Communities Colonizing Drinking Water Distribution Pipes, John J. Kelly, Nicole Minalt, Alessandro Culotti, Marsha Pryor, Aaron Packman May 2014

Temporal Variations In The Abundance And Composition Of Biofilm Communities Colonizing Drinking Water Distribution Pipes, John J. Kelly, Nicole Minalt, Alessandro Culotti, Marsha Pryor, Aaron Packman

Biology: Faculty Publications and Other Works

Pipes that transport drinking water through municipal drinking water distribution systems (DWDS) are challenging habitats for microorganisms. Distribution networks are dark, oligotrophic and contain disinfectants; yet microbes frequently form biofilms attached to interior surfaces of DWDS pipes. Relatively little is known about the species composition and ecology of these biofilms due to challenges associated with sample acquisition from actual DWDS. We report the analysis of biofilms from five pipe samples collected from the same region of a DWDS in Florida, USA, over an 18 month period between February 2011 and August 2012. The bacterial abundance and composition of biofilm communities …


Distribution And Dynamic Habitat Use Of Young Bull Sharks Carcharhinus Leucas In A Highly Stratified Northern Gulf Of Mexico Estuary, J. Marcus Drymon, Matthew J. Ajemian, Sean P. Powers May 2014

Distribution And Dynamic Habitat Use Of Young Bull Sharks Carcharhinus Leucas In A Highly Stratified Northern Gulf Of Mexico Estuary, J. Marcus Drymon, Matthew J. Ajemian, Sean P. Powers

University Faculty and Staff Publications

Understanding how animals alter habitat use in response to changing abiotic conditions is important for effective conservation management. For bull sharks (Carcharhinus leucas), habitat use has been widely examined in the eastern and western Gulf of Mexico; however, knowledge of their movements and the factors influencing them is lacking for populations in the more temperate north-central Gulf of Mexico. To examine how changes in hydrographic conditions affected the presence of young bull sharks in Mobile Bay, Alabama, thirty-five sharks were fitted with internal acoustic transmitters and monitored with an acoustic monitoring array consisting of thirty-three receivers between June …


Joint Phenotypes, Evolutionary Conflict And The Fundamental Theorem Of Natural Selection, David C. Queller May 2014

Joint Phenotypes, Evolutionary Conflict And The Fundamental Theorem Of Natural Selection, David C. Queller

Biology Faculty Research

Multiple organisms can sometimes affect a common phenotype. For example, the portion of a leaf eaten by an insect is a joint phenotype of the plant and insect and the amount of food obtained by an offspring can be a joint trait with its mother. Here, I describe the evolution of joint phenotypes in quantitative genetic terms. A joint phenotype for multiple species evolves as the sum of additive genetic variances in each species, weighted by the selection on each species. Selective conflict between the interactants occurs when selection takes opposite signs on the joint phenotype. The mean fitness of …


Environmental Flow Regime Recommendations For The Promotion Of Salicaceae Seedling Recruitment In California’S Central Valley, Nicholas J. Torrez May 2014

Environmental Flow Regime Recommendations For The Promotion Of Salicaceae Seedling Recruitment In California’S Central Valley, Nicholas J. Torrez

Master's Projects and Capstones

Rivers around the world are being degraded due to alteration of natural flow regimes caused by the creation of dams and diversions to serve human needs for water. Alteration to natural flow regime affects a river’s flow magnitude, frequency, duration, timing, and rate of change of flow. These changes have major repercussions on the processes that drive riparian ecosystems. Repercussions to river processes are manifested in the degradation of riparian forest health. This is evident in the rivers of California’s Central Valley, where altered flow regimes are present in all of its major rivers. As a result, Salicaceae spp. are …


Use Of Coastal Islands By Seabirds: A Tool To Guide Future Marine Protected Areas In California, Dana A. Page May 2014

Use Of Coastal Islands By Seabirds: A Tool To Guide Future Marine Protected Areas In California, Dana A. Page

Master's Projects and Capstones

Seabird breeding colonies on islands off the coast of California offer a unique tool to help guide marine spatial planning. The life histories of seabirds can be used to develop locations of ecological importance along the coast of California. Tracking methodologies and habitat modeling related to seabird habitat utilization can be used to inform management approaches which can aid in the expansion of marine protected areas (MPAs). Protecting ocean habitats will help mitigate impacts of climate change and ensure the ecosystem services provided by marine environments. Areas within the Monterey Bay National Marine Sanctuary were analyzed to locate candidate MPA …


Comparative Biology Of Three Species Of Costa Rican Haeterini, Laura Alexander May 2014

Comparative Biology Of Three Species Of Costa Rican Haeterini, Laura Alexander

LSU New Orleans Theses and Dissertations

Documenting life history characteristics of populations, especially of herbivorous insects such as butterflies, is fundamental to the ecological study of tropical rainforests. However, we know relatively little about tropical forest butterflies. Here, I combine information gathered using the mark-release-recapture (MRR) approach with manipulative and observational experiments in a natural environment to explore aspects of the population biology of three closely-related species of Costa Rican fruit-feeding understory butterflies (Cithaerias pireta, Dulcedo polita, and Pierella helvina), specifically: vertical stratification, attraction to and persistence in fruit-baited traps, relative abundance and distribution, movement patterns, probabilities of recapture and daily survival, …


Arthropod Abundance And Diversity In Restored Longleaf Pine Savannas At Abita Creek Flatwoods Preserve, Cara B. Nighohossian May 2014

Arthropod Abundance And Diversity In Restored Longleaf Pine Savannas At Abita Creek Flatwoods Preserve, Cara B. Nighohossian

LSU New Orleans Theses and Dissertations

The objective of this study is to determine whether changes in arthropod community structure in restored longleaf pine savannas corresponds to differences in vegetation structure often associated with burn frequency. Longleaf pine savannas are fire-maintained ecosystems characteristic of the southeastern United States and have experienced severe declines (around 97%) since European settlement. Changes in fire regime have been instrumental in the declines. Restoration of these ecosystems has involved reinstitution of periodic burnings to promote and maintain vegetative characteristics of the savannas. This study investigates trends in arthropod communities from areas heavily invaded by hardwood shrubs against those dominated by longleaf …


Harvest Incentives: A Tool For Managing Aquatic Invasive Species, Bob Wiltshire, Nathan Stone, Marshall Meyers, Bill Hyatt, Lori Williams, Jason Goldberg, Susan Pasko, Leah Elwell May 2014

Harvest Incentives: A Tool For Managing Aquatic Invasive Species, Bob Wiltshire, Nathan Stone, Marshall Meyers, Bill Hyatt, Lori Williams, Jason Goldberg, Susan Pasko, Leah Elwell

National Invasive Species Council

Conclusion

The success of any harvest incentive program to address aquatic invasive species will depend upon numerous biological, socioeconomic, and legal considerations. Programs that encourage harvest may be a successful management tool in targeting small, distinct populations; in high priority areas within a larger invasion; or they may play a supplementary role within larger control programs. Their use, however, will require careful review, planning, and monitoring to ensure success and that they do not unintentionally lead to further spread of invasive species, cause additional harm to native species, or waste valuable resources.


Dissolved Nutrient Ratios And Concentrations Affect Fungal Reproduction And Community Structure Associated With Submerged Leaf Litter And Wood, Jennifer Fitzgerald May 2014

Dissolved Nutrient Ratios And Concentrations Affect Fungal Reproduction And Community Structure Associated With Submerged Leaf Litter And Wood, Jennifer Fitzgerald

Electronic Theses and Dissertations

Litter-associated fungi are important intermediaries in carbon and energy flow in streams. They can obtain nitrogen (N) and phosphorus (P) from both the substrate and the water column. I tested the effects of dissolved nutrients (dissolved inorganic nitrogen (DIN) 40-975 µg/L, soluble reactive phosphorus (SRP) 2-135 µg/L, N:P ratios 2:1, 16:1, 128:1) on fungi associated with leaf litter (maple and rhododendron) and wood in streamside channels at Coweeta Long Term Ecological Research site, North Carolina. This study addressed two main questions: (1) will fungal reproduction (sporulation rate of aquatic hyphomycetes) peak at a dissolved N:P ratio similar to nutrient stoichiometry …


Turtle Town: Creating A Self-Sustainable Ecosystem Using An Ecological Approach To Turtle Aquarium Design, Sheena K. O'Donnell May 2014

Turtle Town: Creating A Self-Sustainable Ecosystem Using An Ecological Approach To Turtle Aquarium Design, Sheena K. O'Donnell

Undergraduate University Honors Capstones

Typical pet turtle tank setups do not utilize the complete nutrient cycle seen in a functional natural ecosystem. This dysfunction results in waste and nutrient buildup, which is currently managed by water changes and regular tank cleaning. This type of maintenance can be costly and time-consuming -- not to mention unpleasant and hazardous to the aquarium owner's health. This study tested the effectiveness of using plants as part of a proposed ecological tank design to minimize waste buildup by utilizing nutrients. Wastewater from a dirty turtle tank was transferred to a tank setup containing three plants (Experimental Batch 1), while …


The Role Of Nitrogen And Phosphorus In The Growth, Toxicity, And Distribution Of The Toxic Cyanobacteria, Microcystis Aeruginosa, James Parrish May 2014

The Role Of Nitrogen And Phosphorus In The Growth, Toxicity, And Distribution Of The Toxic Cyanobacteria, Microcystis Aeruginosa, James Parrish

Master's Projects and Capstones

Microcystis aeruginosa is among the most common harmful algal-blooming species in the world. Potent microcystins released by M. aeruginosa have been linked to liver failure and death in aquatic mammals, like the endangered California sea otter, and provide a serious public health risk to humans. Once characterized as a freshwater problem, M. aeruginosa is expanding on a global scale, making persistent returns in freshwater, brackish, and coastal marine ecosystems. Though commonly observed dominating aquatic ecosystems in low N:P atomic ratios less than 44:1, the reliability of N:P ratios as a tool for managing and predicting M. aeruginosa blooms is explored …


Role Model Fathers Or Deadbeat Dads? A Study Of Peromyscus Paternal Behavior, Taylor Wapshott May 2014

Role Model Fathers Or Deadbeat Dads? A Study Of Peromyscus Paternal Behavior, Taylor Wapshott

Senior Theses

Paternal behavior is a largely understudied and poorly understood topic, especially in mammalian species. Many current mammalian models for paternal behavior use a comparative approach, taking advantage of natural differences in behavior between closely related species. This study compared paternal behavior in two rodent species, namely Peromyscus maniculatus (BW) and Peromyscus polionotus (PO). PO rodents have been shown to be monogamous, but there have been no studies of their paternal behavior at this time. 10 PO males and 12 BW males were filmed in their home cage for a 10 minute period following initial disturbance of their nest and removal …


An Examination Of The Phylogenetic Diversity Of Green Algae (Chlorophyceae) That Symbiose With Spotted Salamanders (Ambystoma Maculatum) In The Egg Stage., Crystal Xue May 2014

An Examination Of The Phylogenetic Diversity Of Green Algae (Chlorophyceae) That Symbiose With Spotted Salamanders (Ambystoma Maculatum) In The Egg Stage., Crystal Xue

Honors Scholar Theses

In 1909, the species Oophila amblystomatis Lambert ex Wille was described for green algae that symbiose with salamanders in the egg stage (Wille). There are two hypotheses about the source of algae: 1) that algae enter from the surrounding water once the egg clutch is laid in a pond, and 2) that they are acquired from the maternal reproductive tract. We developed a third hypothesis developed to account for the salamander reproductive cycle. Male salamanders lay spermatophores, which are protein-filled capsules, on plant matter in and around ponds. Spermatophores are exposed to the environment before use by females in internal …


Water Water Everywhere: Analyzing Long Island's Water Issues And Finding Solutions For A Sustainable Future, Anthony T. Becker May 2014

Water Water Everywhere: Analyzing Long Island's Water Issues And Finding Solutions For A Sustainable Future, Anthony T. Becker

2014 Student Theses

Over three million people call Long Island their home. With access to beautiful landscapes, world-renowned beaches, and proximity to New York City, it is no wonder that so many proudly call this geographic stretch of glacial till their home. However, throughout the years our actions do not necessarily reflect this affection we have to our home. Years of sprawl and human infestation across the island have resulted in widespread environmental degradation. Specifically, the water we drink and the beaches we enjoy have become endangered. I plan on studying the urban ecology of how intensified population growth led to the eutrophication …


Morphometric Studies On Subadult Liza Subviridis And Sillago Sihama From Sonmiani Bay (Miani Hor), Balochistan, Pakistan, Muhammad A. Gondal, Naureen A. Qureshi, Noor U. Saher May 2014

Morphometric Studies On Subadult Liza Subviridis And Sillago Sihama From Sonmiani Bay (Miani Hor), Balochistan, Pakistan, Muhammad A. Gondal, Naureen A. Qureshi, Noor U. Saher

Journal of Bioresource Management

Length-weight relationship of Liza subviridis and Sillago sihama (Family: Mugilidae; Class: Pisces and Family: Sillaginidae; Class: Pisces) in subadults sampled from Somiani Bay Balochistan, Pakistan during 2002, 2003 and 2006 was analyzed. Liza subviridis showed positive allometry (3.23) in 2002, and negative allometry during 2003 (2.95) and 2006 (1.95). Sub adults of Sillago sihama showed positive allometry during 2002 (3.10) and 2003 (3.13). An isometric condition (3.02) was observed in the samples of Sillago sihama collected from Bhaira in 2006.


On Individual, Sex And Age Differentiation Of Indian House Crow (Corvus Splendens) Call: A Preliminary Study In Potohar, Pakistan, Waqas Hameed, Inayat Ullah, Safia Janjua, Fakhar -I- Abbas, Afsar Mian May 2014

On Individual, Sex And Age Differentiation Of Indian House Crow (Corvus Splendens) Call: A Preliminary Study In Potohar, Pakistan, Waqas Hameed, Inayat Ullah, Safia Janjua, Fakhar -I- Abbas, Afsar Mian

Journal of Bioresource Management

Considering importance of acoustics studies in population biology, 500 calls of the Indian House Crow (Corvus splendens) were recorded in morning - mid-afternoon hours (January-February, 2009) from 23 sites of urban areas of Potahar (Punjab, Pakistan). Calls were recorded using Sony CFS 1030 S sound records (sampling rate = 48 KHz) and edited using Sound Analysis Pro (Version 1.02). software using FFT method rate 50%, data window 9.27 ms, advanced window 1.36 ms. Through editing of calls, we selected 60 (37 ♂♂, 17 ♀♀, 6 Juvenile ♂♂) good quality spectrograms for detailed analysis. Spectrograms were characterized by rapid frequency modulations …


Review: Pollination, Pollinated And Pollinators Interaction In Pakistan, Mohammad Irshad, Elizabeth Stephen May 2014

Review: Pollination, Pollinated And Pollinators Interaction In Pakistan, Mohammad Irshad, Elizabeth Stephen

Journal of Bioresource Management

The agriculture sector is important in the overall economy and export earnings of Pakistan. Pollination is an essential ecosystem service that depends on symbiosis between species, the pollinated and the pollinator. Animal mediated pollination contributes to the sexual production of over 90% species of modern angiosperms. Effective pollination results in increased crop production, quality improvement and more seed production. Many fruits, vegetables, edible oil crops, stimulant crops and nuts are highly dependent on bee pollination. Worldwide value of pollinators is €153 billion (217 billion US dollars). The production value of pollinated dependent crop in Pakistan is quantified to be 1.59 …


Research Note: Contribution To Mushroom Flora Of Rawalpindi-Islamabad, Pakistan, Kishwar Sultana, Naveeda Riaz, Gulshan Irshad, Ali Nauman Khan May 2014

Research Note: Contribution To Mushroom Flora Of Rawalpindi-Islamabad, Pakistan, Kishwar Sultana, Naveeda Riaz, Gulshan Irshad, Ali Nauman Khan

Journal of Bioresource Management

Seven hymenomycetous fungi (mushrooms) were collected from the twin cities area during July 2008. These were identified as the members of the order Agaricales, class Basidiomycetes. They belong to five genera: *Clitocybe fragrans, *Collybia cookie, *Coprinus radians, *Coprinus sterculinus, *Volvariella bingensis, Volvariella parvula, and Termitomyces microcarpus. Five of them, marked with asterisk were reported for the first time from Pakistan.


Diagnostic Accuracy Of C-Reactive Protein In Neonatal Sepsis, Sidra Younis, Muhammad Ali Sheikh, Amjad Ali Raza May 2014

Diagnostic Accuracy Of C-Reactive Protein In Neonatal Sepsis, Sidra Younis, Muhammad Ali Sheikh, Amjad Ali Raza

Journal of Bioresource Management

Sepsis is the most common cause of neonatal mortality and is responsible for 30-50% of total neonatal deaths each year in developing countries. The objective of the study was to determine the diagnostic accuracy of C-reactive protein (CRP) in neonatal sepsis. Fifty nine consecutive patients with risk factors and clinical features suggestive of CRP sepsis were selected as per operational definition and fulfilling the inclusion and exclusion criteria. Detailed physical examination was carried out. Blood sample for culture and CRP was taken from all the patients. Results of blood culture and CRP were noted down in the performa. Statistical analysis …


Macro-Invertebrate Assemblages Among Wild Rice (Zizania Palustris) In Lake Bemidji, Beltrami County, Minnesota, Angela J. Bergo May 2014

Macro-Invertebrate Assemblages Among Wild Rice (Zizania Palustris) In Lake Bemidji, Beltrami County, Minnesota, Angela J. Bergo

Honors Capstones

Capstone submitted as a graduation requirement for the BSU Honors Program.


The State Of The Upper Bay Of Panama Wetlands: Ecological Significance, Environmental Policy, Urbanization, And Social Justice, Madeline A. Price May 2014

The State Of The Upper Bay Of Panama Wetlands: Ecological Significance, Environmental Policy, Urbanization, And Social Justice, Madeline A. Price

Celebration

I conducted this research while studying abroad with SIT Panama: Tropical Ecology, Marine Ecosystems, and Biodiversity Conservation. This is a multidisciplinary investigation of the Upper Bay of Panama wetlands, a 49,000 hectare region east of Panama City that features mangrove, intertidal mudflat, and grassland habitat internationally recognized as a stopover site for two million shorebirds every migration season. However, with economic pressure to increase urban development in the area, this land’s protected status under the Ramsar convention was suspended for a year in April 2012. By compiling scientific studies, news articles, photographs, and interviews with local conservationists and community members, …


El Niño-Southern Oscillation Is Linked To Decreased Energetic Condition In Long-Distance Migrants, Kristina Paxton, Emily B. Cohen, Zoltán Németh, Frank R. Moore May 2014

El Niño-Southern Oscillation Is Linked To Decreased Energetic Condition In Long-Distance Migrants, Kristina Paxton, Emily B. Cohen, Zoltán Németh, Frank R. Moore

Faculty Publications

Predicting how migratory animals respond to changing climatic conditions requires knowledge of how climatic events affect each phase of the annual cycle and how those effects carry-over to subsequent phases. We utilized a 17-year migration dataset to examine how El Niño-Southern Oscillation climatic events in geographically different regions of the Western hemisphere carry-over to impact the stopover biology of several intercontinental migratory bird species. We found that migratory birds that over-wintered in South America experienced significantly drier environments during El Niño years, as reflected by reduced Normalized Difference Vegetation Index (NDVI) values, and arrived at stopover sites in reduced energetic …


Level Of Uv-B Radiation Influences The Effects Of Glyphosate-Based Herbicide On Fitness Of The Spotted Salamander, Nicholas A. Levis May 2014

Level Of Uv-B Radiation Influences The Effects Of Glyphosate-Based Herbicide On Fitness Of The Spotted Salamander, Nicholas A. Levis

Masters Theses & Specialist Projects

Numerous causes have been implicated in contributing to amphibian population declines since the 1980's, with habitat modification, ultraviolet radiation (UV-B) and environmental contaminants (such as glyphosate-based herbicide) being among the most common. This study identifies the effects of a generic glyphosate-based herbicide (GLY- 4 Plus) on mortality, immune function, body condition, and morphological plasticity of larvae of the spotted salamander (Ambystoma maculatum) under conditions that reflect open and closed canopy light regimes. Larval salamander responses to glyphosate-based herbicide varied depending on UV-B conditions. In general, it appears that an open canopy (i.e. greater UV-B exposure) may confer fitness benefits. In …