Ecology and Evolutionary Biology Commons^™

Native Gardens In Southern California, Center For Urban Resilience

Module 10: Garden Ecology

No abstract provided.

Ecology, W. S. Lynn, Eric G. Strauss

Center for Urban Resilience Scholarship

No abstract provided.

Material Recycling And The Myth Of Landfill Diversion, Trevor Zink

Management Faculty Works

Proponents of material recycling typically point to two environmental benefits: disposal (landfill/incinerator) reduction and primary production displacement. However, in this paper we mathematically demonstrate that, without displacement, recycling can delay but not prevent any existing end-of-life material from reaching final disposal. The only way to reduce the amount of material ultimately landfilled or incinerated is to produce less in the first place; material that is not made needs not be disposed. Recycling has the potential to reduce the amount of material reaching end of life solely by reducing primary production. Therefore, the “dual benefits” of recycling are in fact one, …

The Value Of Urban Parklands: A User Study Of The Baldwin Hills, Michele Romolini, Eric Strauss, Sarah Bruce-Eisen, Emily Simso

Center for Urban Resilience Scholarship

This report provides the results of a two-year research study by the Loyola Marymount University Center for Urban Resilience (CURes) to examine park visitation and user behavior and attitudes in the Baldwin Hills Parklands. Supported by the Baldwin Hill Conservancy through California Proposition 84 funding, the goal of this study was to better understand how individuals are using and interacting with the Baldwin Hills Parklands. It is the first large-scale, multi-year, field-based attendance survey and multifaceted analysis of visitors’ experiences in the Parklands, consisting of a pilot and four comprehensive field seasons.

Building on a pilot phase in 2014, 38 …

California Horn Snail Exhibit A Bimodal Size Distribution And Size-Associated Dispersal Patterns, Isai L. Lopez

Honors Thesis

The California Horn Snail (Cerithideopsis californica) is an important primary intermediate host in the life cycle of a variety of parasitic species that have extensive effects on ecological food webs. As such, parasite load in the California Horn Snail can serve as an important tool in assessing the effectiveness of restoration projects. The goal of the study was to investigate the population dynamics of the California Horn Snail in Ballona Wetlands, California, the only major coastal salt marsh in Los Angeles County. This study evaluated the spatial dispersion, size distribution, and density of C. californica collected from the …

Toward Estimating Displaced Primary Production From Recycling: A Case Study Of U.S. Aluminum, Trevor Zink

Management Faculty Works

Recycling materials from end-of-life products has the potential to create environmental benefit by displacing more harmful primary material production. However, displacement is governed by market forces and is not guaranteed; if full displacement does not occur, the environmental benefits of recycling are reduced or eliminated. Therefore, quantifying the true “displacement rate” caused by recycling is essential to accurately assess environmental benefits and make optimal environmental management decisions. Our 2016 article proposed a market-based methodology to estimate actual displacement rates following an increase in recycling or reuse. The current article demonstrates the operation, utility, and challenges of that methodology in the …

Photosynthetic Characterization Of Invasive Plant Diversity In Los Angeles County From 1830-2010, Lauren E. Pangburn, Erich Eberts, Victor Carmona-Galindo

Honors Thesis

The increase in atmospheric CO₂ levels due to climate change may greatly impact invasive plant species, which are non-native organisms that spread unchecked in space and negatively impact native organisms. The success of these invasives may be related to specific traits, such as their photosynthetic pathway. We acquired the specimen information for invasive species registered in the Consortium for California Herbaria of the University of California Berkeley to evaluate the community dynamics of 1,000 invasive species in Los Angeles County. We found that both diversity and richness of invasive plant species has increased over a period of 180 years. …

Network Governance For Large‐Scale Natural Resource Conservation And The Challenge Of Capture, R. P. Bixler, D. M. Wald, L. A. Ogden, K. M. Leong, Michele Romolini

Center for Urban Resilience Scholarship

Large‐scale natural resource conservation initiatives are increasingly adopting a network governance framework to respond to the ecological, social, and political challenges of contemporary environmental governance. A network approach offers new modes of management that allow resource managers and others to transcend a single institution, organization, resource, or landscape and engage in conservation that is multi‐species and multi‐jurisdictional. However, there are challenges to network governance in large‐scale conservation efforts, which we address by focusing on how special interests can capture networks and shape the goals, objectives, and outcomes of initiatives. The term “network capture” is used here to describe an array …

Preliminary Report: A Survey Of Aggressive Behaviors In The American Coot (Fulica Americana) At Ballona Wetlands, California, Victor D. Carmona-Galindo, Mariele Anne Courtois, Kiara Cerda

Biology Faculty Works

Understanding interspecific and intraspecific aggression is important for wildlife management and sustainability of populations. The objective of this study was to evaluate whether there is a difference in number of occurrences of interspecific aggression between American coots (Fulica americana) and mallard ducks (Anas platyrhynchos) and intraspecific aggression among American coots in the Ballona wetland habitat of Southern California. Trends in literature describe coots as highly aggressive toward other coots year-round and toward other bird species during the breeding season. Because we conducted observations outside the breeding season, we hypothesized that more instances of intraspecific aggression would …

Networks And Landscapes: A Framework For Setting Goals And Evaluating Performance At The Large Landscape Scale, R.P. Bixler, S. Johnson, K. Emerson, T. Nabatchi, M. Reuling, C. Curtin, Michele Romolini, J.M. Grove

Center for Urban Resilience Scholarship

The objective of large landscape conservation is to mitigate complex ecological problems through interventions at multiple and overlapping scales. Implementation requires coordination among a diverse network of individuals and organizations to integrate local‐scale conservation activities with broad‐scale goals. This requires an understanding of the governance options and how governance regimes achieve objectives or provide performance evaluation across both space and time. However, empirical assessments measuring network‐governance performance in large landscape conservation are limited. We describe a well‐established large landscape conservation network in North America, the Roundtable on the Crown of the Continent, to explore the application of a social–ecological performance …

Graduate Students Navigating Social-Ecological Research: Insights From The Long-Term Ecological Research Network, S. Record, P. F. B. Ferguson, E. Benveniste, R. A. Graves, V. W. Pfeiffer, Michele Romolini, C. E. Yorke, B. Beardmore

Center for Urban Resilience Scholarship

Interdisciplinary, collaborative research capable of capturing the feedbacks between biophysical and social systems can improve the capacity for sustainable environmental decision making. Networks of researchers provide unique opportunities to foster social-ecological inquiry. Although insights into interdisciplinary research have been discussed elsewhere, they rarely address the role of networks and often come from the perspectives of more senior scientists. We have provided graduate student perspectives on interdisciplinary degree paths from within the Long-Term Ecological Research (LTER) Network. Focusing on data from a survey of graduate students in the LTER Network and four self-identified successful graduate student research experiences, we examined the …

Stewardship Mapping And Assessment Project: A Framework For Understanding Community-Based Environmental Stewardship, E. S. Svendsen, L. K. Campbell, D. R. Fisher, J. J. T. Connolly, M. L. Johnson, N. F. Sonti, D. H. Locke, L. M. Westphal, C. Leblanc Fisher, J. M. Grove, Michele Romolini, D. J. Blahna, K. L. Wolf

Center for Urban Resilience Scholarship

The Stewardship Mapping and Assessment Project (STEW-MAP) is designed to answer who, where, why, and how environmental stewardship groups are caring for our urbanized landscapes. This report is intended to be a guide for those who wish to start STEW-MAP in their own city. It contains step-by-step directions for how to plan and implement a STEW-MAP project. STEW-MAP is both an empirical study of a city’s or region’s civic environmental stewardship resources and a publicly available online database to help support environmental stewardship broadly in these cities. The project adds a social layer of information to biophysical and urban geographic …

By Any Other Name: Image Advertising And The Commercial Speech Doctrine In Jordan V. Jewel, Kelly Miller

Loyola of Los Angeles Entertainment Law Review

This Comment focuses on the commercial speech doctrine as applied to modern advertising strategies, specifically, corporate image advertising. It centers on the recent litigation between basketball superstar Michael Jordan and a Chicago-area grocery chain, Jewel-Osco. When Michael Jordan was inducted into the Basketball Hall of Fame, Jewel-Osco was invited to submit a congratulatory ad for a commemorative issue of Sports Illustrated devoted exclusively to Jordan’s career and accomplishments. Because Jordan had spent the bulk of his storied professional basketball career with the Chicago Bulls, the ad seemed a natural fit. Jordan, who did not give permission for his name to …

Cures Garden Program - Martha Baldwin, Center For Urban Resilience

Module 10: Garden Ecology

No abstract provided.

Space Use By Resident And Transient Coyotes In An Urban–Rural Landscape Mosaic, N. Mitchell, M. W. Strohbach, R. Pratt, W. C. Finn, Eric G. Strauss

Center for Urban Resilience Scholarship

Context. Coyotes (Canis latrans) have adapted successfully to human landscape alteration in the past 150 years and in recent decades have successfully moved into urban areas. While this causes concern about human–wildlife conflicts, research also suggests that coyotes tend to avoid humans and human activity in urban areas. For improving management, a better understanding of space use by coyotes is needed.

Aims. To study how coyote social behaviour influences fine-scale space use in urban areas we present results from an extensive, multi-year GPS telemetry study (2005–13). The study area in coastal Rhode Island is a mosaic of rural, …

Insect Visitation Of Peduncular And Petiolar Extrafloral Nectar Glands On Castor Bean (Ricinus Communis L.) Plants In Southern California, Victor D. Carmona-Galindo, Taylor Waters, David Chirikian

Biology Faculty Works

Castor bean (Ricinus communis L.) is a myrmecophytic plant species with specialized extrafloral nectar (EFN) glands that serve to attract predatory insects, which in return defend plant-tissues against herbivores. The EFN glands on castor bean plants are located along the leaf petioles as well as on the peduncles of its imperfect (unisexual) flowers. This field-project evaluates the richness, diversity, and species assemblage of insects visiting EFN glands located on (female and male) flower peduncles and leaf petioles on castor bean plants growing in a Southern California coastal landscape. We detected that EFN glands on female-flower peduncles were visited by …

Characterization Of Sugar Diversity In Floral And Extra-Floral Nectar From The Coastal Coral Tree (Erythrina Caffra Thunb.) In Southern California, Victor D. Carmona-Galindo, Kenny Morales, Renee Maser, Julius Doyle, Mera Gobrial

Biology Faculty Works

The Coastal Coral Tree (Erythrina caffra Thunb.) produces floral nectar (FN) that serves to attract pollinating insects, but also secretes nectar from extra-floral (EFN) glands that serves to at-tract predatory insects, such as ants. While stu-dies on myrmecophytes (i.e. specialized plants that attract and interact with ants) have primarily focused on interspecific evaluations of EFN chemistry, the Coastal Coral tree offers an op-portunity to contrast intraspecific nectar chemi-stry with differing evolutionary and ecological functions. We hypothesized that the richness of (molecular) sugar species, relative concentra-tions, and diversity of sugars in FN and foliar EFN would diverge due to differences in …

Review Of Darwinism And The Divine: Evolutionary Thought And Natural Theology, Timothy Shanahan

Philosophy Faculty Works

No abstract provided.

La Diversidad De Los Análisis De Diversidad La Diversidad De Los Analisis De Diversidad [The Diversity Of Diversity Analyses], Victor D. Carmona-Galindo, Tizziana V. Carmona

Biology Faculty Works

There is a lack of consistency with respect to the use of the terms like species richness, diversity and biodiversity, which extends to the analysis of diversity indices and the merit of using diversity indices in the evaluation (comparison and contrast) of biological communities. The purpose of this article is to provide working definitions for these terms and cite examples from the primary literature that demonstrate the utility of estimating richness, evaluating proportional abundance patterns, as well as comparing indices of diversity and similarity to study patterns of biological organization at different ecological scales. Additionally, we provide a manual in …

Metals And Bacteria Partitioning To Various Size Particles In Ballona Creek Storm Water Runoff, J. S. Brown, E. D. Stein, D. Ackerman, John H. Dorsey, J. Lyon, P. M. Carter

Center for Urban Resilience Scholarship

Many storm water best management practice (BMP) devices function primarily by capturing particulate matter to take advantage of the well‐documented association between storm water particles and pollutants. The hydrodynamic separation or settling methods used by most BMP devices are most effective at capturing medium to large particles; however, these may not be the most predominant particles associated with urban runoff. The present study examined particle size distribution in storm water runoff from an urban watershed in southern California and investigated the pollutant–particle associations of metals (Cu, Pb, Ni, and Zn) and bacteria (enterococci and Escherichia coli). During small storm …

The Next Generation Of Scientists: Examining The Experiences Of Graduate Students In Network-Level Social-Ecological Science, Michele Romolini, S. Record, R. Garvoille, Y. Marusenko, R. S. Geiger

Center for Urban Resilience Scholarship

By integrating the research and resources of hundreds of scientists from dozens of institutions, network-level science is fast becoming one scientific model of choice to address complex problems. In the pursuit to confront pressing environmental issues such as climate change, many scientists, practitioners, policy makers, and institutions are promoting network-level research that integrates the social and ecological sciences. To understand how this scientific trend is unfolding among rising scientists, we examined how graduate students experienced one such emergent social-ecological research initiative, Integrated Science for Society and Environment, within the large-scale, geographically distributed Long Term Ecological Research (LTER) Network. Through workshops, …

What Is Urban Environmental Stewardship? Constructing A Practitioner-Derived Framework, Michele Romolini, W. Brinkley, K. L. Wolf

Center for Urban Resilience Scholarship

Agencies and organizations deploy various strategies in response to environmental challenges, including the formulation of policy, programs, and regulations. Citizen-based environmental stewardship is increasingly seen as an innovative and important approach to improving and conserving landscape health. A new research focus on the stewardship of urban natural resources is being launched by the U.S. Forest Service in the Pacific Northwest region. Early scoping efforts are addressing various scales of human systems ranging from individuals to organizations to the entire positive “footprint” of stewardship on the land. This report addresses a fundamental need—to understand and describe civic environmental stewardship in urban …

Biophysics, Environmental Stochasticity, And The Evolution Of Thermal Safety Margins In Intertidal Limpets, W. Wesley Dowd, M. W. Denny

Biology Faculty Works

As the air temperature of the Earth rises, ecological relationships within a community might shift, in part due to differences in the thermal physiology of species. Prediction of these shifts – an urgent task for ecologists – will be complicated if thermal tolerance itself can rapidly evolve. Here, we employ a mechanistic approach to predict the potential for rapid evolution of thermal tolerance in the intertidal limpet Lottia gigantea. Using biophysical principles to predict body temperature as a function of the state of the environment, and an environmental bootstrap procedure to predict how the environment fluctuates through time, we create …

Review: Back To Darwin, Timothy Shanahan

Philosophy Faculty Works

No abstract provided.

Male Remating Success And The Frequency Of Copulatory Plugs In The Green Lynx Spider Peucetia Viridans (Araneae, Oxyopidae), Martina G. Ramirez, Angelik C. Achekian, Catherine R. Coverley, Rachel M. Pierce, Sarah S. Eiman, Melissa M. Wetkowski

Biology Faculty Works

Peucetia viridans males were allowed to mate with three virgin females and most matings resulted in live spiderlings, even when males lacked palpal paracymbial processes. Among females, the presence of copulatory plugs was inconsistent, and when present, their condition was not uniform; broken-off male paracymbia were often found in epigynal orifices. There was no size effect in a male’s ability to completely plug a female’s genital orifices, as well as no significant change in the pattern of plug production over consecutive mating trials. Among mated, field-collected females, the presence of plugs and paracymbia was variable, with females from some sites …

Estimating Consumption Rates Of Juvenile Sandbar Sharks (Carcharhinus Plumbeus) In Chesapeake Bay, Virginia, Using A Bioenergetics Model, W. Wesley Dowd, Richard W. Brill, Peter G. Bushnell, John A. Musick

Biology Faculty Works

Using a bioenergetics model, we estimated daily ration and seasonal prey consumption rates for six age classes of juvenile sandbar sharks (Carcharhinus plumbeus) in the lower Chesapeake Bay summer nursery area. The model, incorporating habitat and species-specific data on growth rates, metabolic rate, diet composition, water temperature (range 16.8−27.9°C), and population structure, predicted mean daily rations between 2.17 ±0.03 (age-0) and 1.30 ±0.02 (age-5) % body mass/day. These daily rations are higher than earlier predictions for sandbar sharks but are comparable to those for ecologically similar shark species. The total nursery population of sandbar sharks was predicted to consume ~124,000 …