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Articles 1 - 30 of 137
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At-Home Yogurt Making To Investigate Microbiology Concepts: A Remote Biology Laboratory, Tatiana Kuzmenko, Jacqueline Raetz-Vigon, Demian A. Willette
At-Home Yogurt Making To Investigate Microbiology Concepts: A Remote Biology Laboratory, Tatiana Kuzmenko, Jacqueline Raetz-Vigon, Demian A. Willette
Biology Faculty Works
The global COVID-19 pandemic has forced many educators to move their courses to the online environment with little time to adjust. It especially affected undergraduate biology laboratory courses that rely on on-campus facilities to provide students with meaningful laboratory-type experiences. Here we describe a multisession, at-home, and hands-on laboratory activity that utilizes yogurt culturing to explore microbiology concepts. We also summarize the findings of 219 undergraduate students who successfully performed this lab remotely. In small virtual groups, students learned how to make yogurt at home, formulate a testable hypothesis, run an experiment on conditions necessary for yogurt fermentation, analyze experimental …
Seagrasses Under Times Of Change - Editorial, Gidon Winters, Mirta Teichberg, Hauke Reuter, Inés G. Viana, Demian A. Willette
Seagrasses Under Times Of Change - Editorial, Gidon Winters, Mirta Teichberg, Hauke Reuter, Inés G. Viana, Demian A. Willette
Biology Faculty Works
No abstract provided.
Sustainable Seafood Using Octopus As A Model, Ian G. Gleadall, Warwick H.H. Sauer, Hassan Moustahfid, Cheryl L. Ames, Demian A. Willette
Sustainable Seafood Using Octopus As A Model, Ian G. Gleadall, Warwick H.H. Sauer, Hassan Moustahfid, Cheryl L. Ames, Demian A. Willette
Biology Faculty Works
The global catch of octopus and squid shows annual variability and demand is likely to increase for both locally-supplied and imported products. However, the vulnerability of seafood resources is now well known, the reliability of fisheries catch data is still unclear, management of cephalopod stocks is mostly rudimentary, and there is uncertainty and concern about their sustainability among fisheries managers, the fishing industry, retailers, researchers and consumers. Here, a new project is presented which aims to address and resolve ways to enhance the effectiveness of seafood sustainability in general, with the aid of a freely accessible identification and traceability tool …
Plant-Derived Drug Discovery In An Introductory Biology Laboratory Course, Tatiana Kuzmenko, Ashwarya Sharma, Demian A. Willette
Plant-Derived Drug Discovery In An Introductory Biology Laboratory Course, Tatiana Kuzmenko, Ashwarya Sharma, Demian A. Willette
Biology Faculty Works
Hands-on, inquiry-based laboratory activities are excellent opportunities to introduce first-year undergraduate students to the lab environment and to catalyze new interest in topics they may not yet know or be as enthusiastic about studying. We describe a multisession introductory laboratory activity that couples the research areas of medicinal drug discovery and plant biology. Selecting from a diversity of native California plants and broadly recognized medicinal plants, students learn and apply an assortment of basic phytochemical assays, analyze preliminary data, and then formulate hypothesis-driven follow-up experiments. Working in small groups, students develop shared project management and collaboration skills, and present activity …
From Coast To Coast To Coast: Ecology And Management Of Eelgrass Systems Across Canada, Sarah Joy Bittick
From Coast To Coast To Coast: Ecology And Management Of Eelgrass Systems Across Canada, Sarah Joy Bittick
Biology Faculty Works
Seagrass meadows are among the most productive and diverse marine ecosystems, providing essential structure, functions, and services. They are also among the most impacted by human activities and in urgent need of better management and protection. In Canada, eelgrass (Zostera marina) meadows are found along the Atlantic, Pacific, and Arctic coasts, and thus occur across a wide range of biogeographic conditions. Here, we synthesize knowledge of eelgrass ecosystems across Canada’s coasts, highlighting commonalities and differences in environmental conditions, plant, habitat, and community structure, as well as current trends and human impacts. Across regions, eelgrass life history, phenology, and general species …
A Functional Genomics Screen Identifying Blood Cell Development Genes In Drosophila By Undergraduates Participating In A Course-Based Research Experience, Cory Evans
Biology Faculty Works
Undergraduate students participating in the UCLA Undergraduate Research Consortium for Functional Genomics (URCFG) have conducted a two-phased screen using RNA interference (RNAi) in combination with fluorescent reporter proteins to identify genes important for hematopoiesis in Drosophila. This screen disrupted the function of approximately 3500 genes and identified 137 candidate genes for which loss of function leads to observable changes in the hematopoietic development. Targeting RNAi to maturing, progenitor, and regulatory cell types identified key subsets that either limit or promote blood cell maturation. Bioinformatic analysis reveals gene enrichment in several previously uncharacterized areas, including RNA processing and export and vesicular …
Characterizing Industrial And Artisanal Fishing Vessel Catch Composition Using Environmental Dna And Satellite-Based Tracking Data, Demian A. Willette, Gabriela Navarrete-Forero, Zachary Gold, Apollo Marco D. Lizano, Leonardo Gonzalez-Smith, Giovanna Sotil
Characterizing Industrial And Artisanal Fishing Vessel Catch Composition Using Environmental Dna And Satellite-Based Tracking Data, Demian A. Willette, Gabriela Navarrete-Forero, Zachary Gold, Apollo Marco D. Lizano, Leonardo Gonzalez-Smith, Giovanna Sotil
Biology Faculty Works
The decline in wild-caught fisheries paired with increasing global seafood demand is pushing the need for seafood sustainability to the forefront of national and regional priorities. Validation of species identity is a crucial early step, yet conventional monitoring and surveillance tools are limited in their effectiveness because they are extremely time-consuming and require expertise in fish identification. DNA barcoding methods are a versatile tool for the genetic monitoring of wildlife products; however, they are also limited by requiring individual tissue samples from target specimens which may not always be possible given the speed and scale of seafood operations. To circumvent …
Inconclusive Evidence Of Sexual Reproduction Of Invasive Halophila Stipulacea: A New Field Guide To Encourage Investigation Of Flower And Fruit Production Throughout Its Invasive Range, Fee O.H. Smulders, Kelcie L. Chiquillo, Demian A. Willette, Paul H. Barber, Marjolijn J.A. Christianen
Inconclusive Evidence Of Sexual Reproduction Of Invasive Halophila Stipulacea: A New Field Guide To Encourage Investigation Of Flower And Fruit Production Throughout Its Invasive Range, Fee O.H. Smulders, Kelcie L. Chiquillo, Demian A. Willette, Paul H. Barber, Marjolijn J.A. Christianen
Biology Faculty Works
The dioecious seagrass species Halophila stipulacea reproduces mainly through fast clonal growth, underlying its invasive behavior. Here, we provide morphological evidence to show that the first findings of fruits in the Caribbean were misidentified. Consequently, H. stipulacea reproduction is likely still only asexual in the Caribbean. Therefore, we introduce an identification key of H. stipulacea reproductive structures to encourage careful identification and quantification throughout its invasive range. Until large-scale seed production in invaded habitats is reported, the apparent low rate of sexual reproduction needs to be considered in current studies investigating the invasion capacity of this species.
The Tropical Seagrass Halophila Stipulacea: Reviewing What We Know From Its Native And Invasive Habitats, Alongside Identifying Knowledge Gaps, Gidon Winters, Sven Beer, Demian A. Willette, Inés G. Viana, Kelcie L. Chiquillo, Pedro Beca-Carretero, Betty Villamayor, Tomás Azcárate-García, Rachamim Shem-Tov, Bridget Mwabvu, Luciana Migliore, Alice Rotini, Michelle A. Oscar, Jonathan Belmaker, Inbal Gamliel, Ana Alexandre, Aschwin H. Engelen, Gabriele Procaccini, Gil Rilov
The Tropical Seagrass Halophila Stipulacea: Reviewing What We Know From Its Native And Invasive Habitats, Alongside Identifying Knowledge Gaps, Gidon Winters, Sven Beer, Demian A. Willette, Inés G. Viana, Kelcie L. Chiquillo, Pedro Beca-Carretero, Betty Villamayor, Tomás Azcárate-García, Rachamim Shem-Tov, Bridget Mwabvu, Luciana Migliore, Alice Rotini, Michelle A. Oscar, Jonathan Belmaker, Inbal Gamliel, Ana Alexandre, Aschwin H. Engelen, Gabriele Procaccini, Gil Rilov
Biology Faculty Works
Halophila stipulacea is a small tropical seagrass, native to the Red Sea, Persian Gulf, and the Indian Ocean. It invaded the Mediterranean Sea 150 years ago as a Lessepsian migrant, but so far has remained in insulated, small populations across this basin. Surprisingly, in 2002 it was reported in the Caribbean Sea, where within less than two decades it spread to most of the Caribbean Island nations and reaching the South American continent. Unlike its invasion of Mediterranean, in the Caribbean H. stipulacea creates large, continuous populations in many areas. Reports from the Caribbean demonstrated the invasiveness of H. stipulacea …
Seasonally Specific Changes In Migration Phenology Across 50 Years In The Black-Throated Blue Warbler, Kristen M. Covino
Seasonally Specific Changes In Migration Phenology Across 50 Years In The Black-Throated Blue Warbler, Kristen M. Covino
Biology Faculty Works
The availability of detailed information that encompasses the geographic range of a species, spans a long-term temporal range, and yields individual information (e.g., age and sex), is a principle challenge in ecology. To this end, the North American Bird Banding Laboratory maintains a unique and underutilized dataset that can be used to address core questions of phenological change in migratory birds. We used records from 1966 to 2015 to quantify how the timing of migration has shifted in a long-distance migrant, the Black-throated Blue Warbler (Setophaga caerulescens). Additionally, we examined age and sex differences in the timing of migratory movements. …
Inaccurate And Biased Global Media Coverage Underlies Public Misunderstanding Of Shark Conservation Threats And Solutions, Sarah Joy Bittick
Inaccurate And Biased Global Media Coverage Underlies Public Misunderstanding Of Shark Conservation Threats And Solutions, Sarah Joy Bittick
Biology Faculty Works
Sharks are a taxon of significant conservation concern and associated public interest. The scientific community largely supports management policies focusing on sustainable fisheries exploitation of sharks, but many concerned members of the public and some environmental advocates believe that sustainable shark fisheries cannot and do not exist and therefore support total bans on all shark fisheries and/or trade in shark products. The belief that sustainable shark fisheries cannot and do not exist persists despite scientific evidence showing that they can and do, and are important to livelihoods. Additionally, many concerned members of the public are only aware of one threat …
Investigating Los Angeles' Urban Roadway Network From A Biologically-Formed Perspective, Sophia Deen, Tatiana Kuzmenko, Demian A. Willette, Hossein Asghari
Investigating Los Angeles' Urban Roadway Network From A Biologically-Formed Perspective, Sophia Deen, Tatiana Kuzmenko, Demian A. Willette, Hossein Asghari
Biology Faculty Works
The evolution of networks is constrained by spatial properties of the environment; a characterization that is true in both biological and built networks. Hence built networks such as urban streets can be compared to biological networks to reveal differences in efficiency and complexity. This study assessed foraging networks created by the slime-mold Physarium polycephalum on proportional 3D-printed topographic maps of metropolitan city of Los Angeles, California. Rapidly-generated isomorphic solutions were found to be consistently and statistically shorter than existing roadways in system length. Slime mold also allocated resources to supporting key nodes, analogous to how heavy traffic flows through major …
Humanity’S Best Friend: A Dog-Centric Approach To Addressing Global Challenges, Eric Strauss
Humanity’S Best Friend: A Dog-Centric Approach To Addressing Global Challenges, Eric Strauss
Biology Faculty Works
No other animal has a closer mutualistic relationship with humans than the dog (Canis familiaris). Domesticated from the Eurasian grey wolf (Canis lupus), dogs have evolved alongside humans over millennia in a relationship that has transformed dogs and the environments in which humans and dogs have co-inhabited. The story of the dog is the story of recent humanity, in all its biological and cultural complexity. By exploring human-dog-environment interactions throughout time and space, it is possible not only to understand vital elements of global history, but also to critically assess our present-day relationship with the natural world, and to begin …
Incorporating Physiology Into Species Distribution Models Moderates The Projected Impact Of Warming On Mediterranean Marine Species, Inbal Gamliel, Yehezkel Buba, Tamar Guy-Haim, Tal Garval, Demian A. Willette, Gil Rilov, Jonathan Belmaker
Incorporating Physiology Into Species Distribution Models Moderates The Projected Impact Of Warming On Mediterranean Marine Species, Inbal Gamliel, Yehezkel Buba, Tamar Guy-Haim, Tal Garval, Demian A. Willette, Gil Rilov, Jonathan Belmaker
Biology Faculty Works
Species distribution models (SDMs) correlate species occurrences with environmental predictors, and can be used to forecast distributions under future climates. SDMs have been criticized for not explicitly including the physiological processes underlying the species response to the environment. Recently, new methods have been suggested to combine SDMs with physiological estimates of performance (physiology-SDMs). In this study, we compare SDM and physiology-SDM predictions for select marine species in the Mediterranean Sea, a region subjected to exceptionally rapid climate change. We focused on six species and created physiology-SDMs that incorporate physiological thermal performance curves from experimental data with species occurrence records. We …
Spring Migration Of Blackpoll Warblers Across North America, Kristen M. Covino
Spring Migration Of Blackpoll Warblers Across North America, Kristen M. Covino
Biology Faculty Works
The awe-inspiring seasonal migrations of birds between breeding and wintering grounds has long attracted the interest of casual naturalists and professional ornithologists alike. Although new technologies improve our ability to follow individual migrants throughout their annual cycle, the scale and detail provided by banding records remain incredibly valuable. The focus of avian migration studies is often the most physiologically challenging migratory feats that sometimes leaves certain species or seasons relatively understudied. The Blackpoll Warbler (Setophaga striata) is well-known for its transoceanic migratory flight during fall migration, the season in which it is best studied, yet the details of its spring …
Expression-Based Cell Lineage Analysis In Drosophila Through A Course-Based Research Experience For Early Undergraduates, Cory J. Evans
Expression-Based Cell Lineage Analysis In Drosophila Through A Course-Based Research Experience For Early Undergraduates, Cory J. Evans
Biology Faculty Works
A variety of genetic techniques have been devised to determine cell lineage relationships during tissue development. Some of these systems monitor cell lineages spatially and/or temporally without regard to gene expression by the cells, whereas others correlate gene expression with the lineage under study. The GAL4 Technique for Real-time and Clonal Expression (G-TRACE) system allows for rapid, fluorescent protein-based visualization of both current and past GAL4 expression patterns and is therefore amenable to genome-wide expression-based lineage screens. Here we describe the results from such a screen, performed by undergraduate students of the University of California, Los Angeles (UCLA) Undergraduate Research …
A Rapidly Expanding Alga Acts As A Secondary Foundational Species Providing Novel Ecosystem Functions In The South Pacific, Sarah Joy Bittick
A Rapidly Expanding Alga Acts As A Secondary Foundational Species Providing Novel Ecosystem Functions In The South Pacific, Sarah Joy Bittick
Biology Faculty Works
Foundation species facilitate associated communities and provide key ecosystem functions, making anthropogenically driven phase-shifts involving these species critically important. One well documented such phase-shift has been from coral to algal domination on tropical reefs. On South Pacific coral reefs, the macroalga Turbinaria ornata has expanded its range and habitat but, unlike algae that often dominate after phase-shifts, T. ornata is structurally complex and generally unpalatable to herbivores. Therefore, it may serve a foundational role on coral reefs, such as providing habitat structure to more palatable primary producers and corresponding trophic support to fishes. We predicted increasing T. ornata density would …
Dna Barcoding Cannot Discriminate Between Sardinella Tawilis And S. Hualiensis (Clupeiformes: Clupeidae), Alison Faye O. Chan, Adrian U. Luczon, Ian Kendrick C. Fontanilla, Perry S. Ong, Mudjekeewis D. Santos, Demian A. Willette, Jonas P. Quilang
Dna Barcoding Cannot Discriminate Between Sardinella Tawilis And S. Hualiensis (Clupeiformes: Clupeidae), Alison Faye O. Chan, Adrian U. Luczon, Ian Kendrick C. Fontanilla, Perry S. Ong, Mudjekeewis D. Santos, Demian A. Willette, Jonas P. Quilang
Biology Faculty Works
Sardinella tawilis, the only known freshwater sardinella in the world, is endemic to Taal Lake, Philippines. Previous studies found the Taiwan sardinella, S. hualiensis, to be morphologically very similar to S. tawilis and identified it as the marine sister species of S. tawilis. In this study, DNA barcoding using the mitochondrial cytochrome c oxidase I (COI) gene was carried out to analyze species demarcation in the Sardinella genus, focusing primarily on the relationship between S. tawilis and S. hualiensis. The neighbour-joining (NJ) tree that was constructed using Kimura 2-parameter (K2P) model showed a single clade for the two species with …
Accurate Measurement Of Main Aerosol Constituents From Heated Tobacco Products (Htps): Implications For A Fundamentally Different Aerosol, Hovik J. Gasparyan
Accurate Measurement Of Main Aerosol Constituents From Heated Tobacco Products (Htps): Implications For A Fundamentally Different Aerosol, Hovik J. Gasparyan
Biology Faculty Works
ISO 4387 Standard determines the main aerosol constituents (total particulate matter, water, nicotine, and nicotine-free-dry-particulate matter, referred to as “tar”) in cigarette mainstream smoke (ISO, 2000). Heated Tobacco Products (also called Tobacco Heating Products or Heat-not-Burn Products) are designed to form aerosol by heating tobacco rather than burning like in combustible cigarettes. In this study we have evaluated the suitability of ISO 4387 Standard to be adapted for quantifying main aerosol constituents for HTP aerosol. HTP emissions have much higher levels of water and humectants (e.g., glycerol) in dynamic equilibria between gaseous and particulate phases. Several modifications to ISO 4387 …
Patterns Of Uncertainty In Life-History And Extinction Risk For Arctic Vertebrates, Sarah Joy Bittick
Patterns Of Uncertainty In Life-History And Extinction Risk For Arctic Vertebrates, Sarah Joy Bittick
Biology Faculty Works
Conserving Arctic wildlife will be challenging given the ongoing environmental changes in the region. In addition, there is a lack of fundamental biological information for many Arctic species, including a dearth of knowledge surrounding conservation threats and the risk of extinction. In this study, we gather all available data on research effort and life-history traits to assess the current state of scientific knowledge surrounding 389 Arctic vertebrate species. We also quantify patterns of species evaluation by the IUCN Red List, a global database of conservation risk used to measure success and prioritize resources in many conservation programs. We find that …
Informing Canada’S Commitment To Biodiversity Conservation: A Science-Based Framework To Help Guide Protected Areas Designation Through Target 1 And Beyond, Sarah Joy Bittick
Informing Canada’S Commitment To Biodiversity Conservation: A Science-Based Framework To Help Guide Protected Areas Designation Through Target 1 And Beyond, Sarah Joy Bittick
Biology Faculty Works
Biodiversity is intrinsically linked to the health of our planet—and its people. Yet, increasingly, human activities are causing the extinction of species, degrading ecosystems, and reducing nature’s resilience to climate change and other threats. As a signatory to the Convention on Biological Diversity, Canada has a legal responsibility to protect 17% of land and freshwater by 2020. Currently, Canada has protected ∼10% of its terrestrial lands, requiring a marked increase in the pace and focus of protection over the next three years. Given the distribution, extent, and geography of Canada’s current protected areas, systematic conservation planning would provide decision-makers with …
Breaking Boundaries In Computing In Undergraduate Courses, Kam D. Dahlquist, John David N. Dionisio, Ran Libeskind-Hadas, Anna E. Bargagliotti
Breaking Boundaries In Computing In Undergraduate Courses, Kam D. Dahlquist, John David N. Dionisio, Ran Libeskind-Hadas, Anna E. Bargagliotti
Biology Faculty Works
An important question in undergraduate curricula is that of incorporating computing into STEM courses for majors and non-majors alike. What does it mean to teach “computing” in this context? What are some of the benefits and challenges for students and instructors in such courses? This paper contributes to this important dialog by describing three undergraduate courses that have been developed and taught at Harvey Mudd College and Loyola Marymount University. Each case study describes the course objectives, implementation challenges, and assessments.
Delivering On Seafood Traceability Under The New U.S. Import Monitoring Program, Demian A. Willette, Samantha H. Cheng
Delivering On Seafood Traceability Under The New U.S. Import Monitoring Program, Demian A. Willette, Samantha H. Cheng
Biology Faculty Works
The United States is the world’s largest fish importer. Recent reports, however, indicate that 25–30% of wild-caught seafood imported into the US is illegally caught, heightening concerns over the country’s significant role in driving Illegal, Unreported, and Unregulated (IUU) fishing. In January 2017, NOAA enacted the Seafood Import Monitoring Program in an effort to combat IUU fishing through mandating improved seafood traceability requirements. This program requires reporting of fisheries data from harvest to arrival at the US border. Given the role of the US as a major global importer of seafood, this regulation could be a transformative action on fisheries …
A Tale Of Two Algal Blooms: Negative Effects Of Two Dominant Genera On Seagrass And Its Epiphytes, Sarah Joy Bittick
A Tale Of Two Algal Blooms: Negative Effects Of Two Dominant Genera On Seagrass And Its Epiphytes, Sarah Joy Bittick
Biology Faculty Works
Recent evidence suggests macroalgal blooms may play a role in the worldwide decline in seagrass, but the shape of the functional relationship between seagrass health and dominant bloom-forming macroalgae is poorly characterized. We tested whether the impact of varying abundances of two cosmopolitan bloom-forming macroalgal genera caused linear/quasi-linear or sudden threshold changes in measures of eelgrass, Zostera marina, meadow health. We conducted two caging experiments in a shallow Z. marina bed (∼1 m depth) in Bodega Harbor, California, USA where we maintained six densities within the range of natural abundances of macroalgae, Ulva (0-4.0 kg m-2) and Gracilariopsis (0-2.0 kg …
Rethinking Solutions To Seafood Fraud, Demian A. Willette, Samantha H. Cheng, Jerry A. Greenberg, Paul H. Barber
Rethinking Solutions To Seafood Fraud, Demian A. Willette, Samantha H. Cheng, Jerry A. Greenberg, Paul H. Barber
Biology Faculty Works
No abstract provided.
Re: Edna To Identify Rare Species In Fisheries By-Catch., Demian A. Willette, Gabriella Navarrete Forego, Apollo Marco Lizano, Giovanna Sotil
Re: Edna To Identify Rare Species In Fisheries By-Catch., Demian A. Willette, Gabriella Navarrete Forego, Apollo Marco Lizano, Giovanna Sotil
Biology Faculty Works
No abstract provided.
Clinical Implications Of Augmenter Of Liver Regeneration In Cancer: A Systematic Review, Deepa V. Dabir
Clinical Implications Of Augmenter Of Liver Regeneration In Cancer: A Systematic Review, Deepa V. Dabir
Biology Faculty Works
Background/Aim: Hepatocellular carcinoma is a substantial healthcare burden with high prevalence and poor prognosiS. As such, efforts are continually made to uncover molecules relevant in cancer biology, that are exploitable as targets for therapy. The mitochondrion is the powerhouse of the cell and exhibits altered functionality in the malignant state, including aberrant regulation of apoptosis and cellular respiration. Augmenter of liver regeneration (ALR) is a multifunctional mitochondrial protein that demonstrates antioxidative and anti-apoptotic properties and plays a key role in liver regeneration. Materials and Methods: The present study systematically reviews the available literature on the role of ALR in cancer. …
Osm1 Facilitates The Transfer Of Electrons From Erv1 To Fumarate In The Redox-Regulated Import Pathway In The Mitochondrial Intermembrane Space, Deepa V. Dabir
Osm1 Facilitates The Transfer Of Electrons From Erv1 To Fumarate In The Redox-Regulated Import Pathway In The Mitochondrial Intermembrane Space, Deepa V. Dabir
Biology Faculty Works
Prokaryotes have aerobic and anaerobic electron acceptors for oxidative folding of periplasmic proteins. The mitochondrial intermembrane space has an analogous pathway with the oxidoreductase Mia40 and sulfhydryl oxidase Erv1, termed the mitochondrial intermembrane space assembly (MIA) pathway. The aerobic electron acceptors include oxygen and cytochrome c, but an acceptor that can function under anaerobic conditions has not been identified. Here we show that the fumarate reductase Osm1, which facilitates electron transfer from fumarate to succinate, fills this gap as a new electron acceptor. In addition to microsomes, Osm1 localizes to the mitochondrial intermembrane space and assembles with Erv1 in a …
Effect Of Fuel Deposition Rate On Departure Fuel Load Of Migratory Songbirds During Spring Stopover Along The Northern Coast Of The Gulf Of Mexico, Kristen M. Covino
Effect Of Fuel Deposition Rate On Departure Fuel Load Of Migratory Songbirds During Spring Stopover Along The Northern Coast Of The Gulf Of Mexico, Kristen M. Covino
Biology Faculty Works
Migrants are generally assumed to minimize their overall migration time by adjusting their departure fuel loads (DFL) in relation to anticipated and experienced fuel deposition rates (FDRs). We utilized a 21-yr long migration banding station dataset to examine the relationship between FDR and DFL during spring migration in six Nearctic-Neotropical migratory songbird species during stopover along the northern coast of the Gulf of Mexico (GOM) following trans-gulf flight. Estimates of fuel stores, stopover durations, and FDRs from our long term migration data set were combined to determine DFL. We expected and found that migrants across all six species adjust their …
Simultaneous Synergist, Antagonistic, And Additive Interactions Between Multiple Local Stressors All Degrade Algal Turf Communities On Coral Reefs, Sarah Joy Bittick
Simultaneous Synergist, Antagonistic, And Additive Interactions Between Multiple Local Stressors All Degrade Algal Turf Communities On Coral Reefs, Sarah Joy Bittick
Biology Faculty Works
1. Ecological communities are subjected to multiple anthropogenic stressors at both global and local scales that are increasing in number and magnitude. Stressors can interact in complex ways and are classified as additive, synergistic or antagonistic; the nature of the interaction is key to predicting changes and understanding community resilience. Coral reefs are among the most impacted communities and have shifted from coral to algal-dominated states, and overfishing, nutrient enrichment and sedimentation are local stressors that often cooccur and may support degraded algal states. Short algal turfs are abundant benthic space holders on healthy reefs that may be pushed by …