Digital Commons Network^™

Community Science In Support Of Ecosystem-Based Management: A Case Study From The Damariscotta River Estuary, Maine, Usa, Sarah C. Risley, Kara E. Pellowe, Melissa L. Britsch, Meredith M. White, Heather M. Leslie

Maine Policy Review

Coastal marine ecosystems are dynamic social-ecological systems (SESs) that support diverse ecosystem services and human activities. The complexity of SESs means that ecosystem-based approaches are increasingly used to support coastal marine ecosystem stewardship. We report how a community science program in Maine, USA offers a model of organizational innovation to expand capacities for shellfish research and management. Since 2019, we have collaborated with local students, shellfish harvesters, and others in data collection, interpretation, and application, contributing to local shellfish management and ecosystem sustainability. We demonstrate how community-based social and ecological research can build adaptive capacities by centering local knowledge; generating …

3d Computer Modeling Offers New Insights Into Diatom Ecology, Joseph Mohan

Electronic Theses and Dissertations

Algae supply over half of the Earth’s global primary production and form the base of almost all aquatic food networks. Thus, changes in algal productivity or composition will induce profound shifts in many ecosystems. This research is guided by two questions. Herein I ask if 3D models of algae can be created accurately enough to use for research applications? If they can be accurately created, then how can these models be used to advance our understanding of functional trait evolution and paleoecology? Herein, I develop 3D computer models for estimating the volume of individual algae and their parts. I also …

A Social-Ecological Examination Of Moose In Maine: Habitat, Management, And Changing Seasonality, Asha Dimatteo-Lepape

Electronic Theses and Dissertations

Maine is a New England state with rich ecosystems and diverse opportunities for enjoying the outdoors. Maine is well known as a popular nature-based tourist destination, and is often associated with its notable moose population. Social-ecological systems in Maine are highly intertwined, and as such, are especially susceptible to impacts resulting from climate change. Moose health in the state is already being negatively impacted by climate change with high infestation rates of winter tick resulting in declining moose health and high moose calf mortality. Given that late winter is a time of high stress and increased mortality of moose due …

The Impacts Of Climate Change On The Gulf Of Maine Northern Shrimp (Pandalus Borealis) Distribution, Reproduction, And Life, Hsiao-Yun Chang

Electronic Theses and Dissertations

The Gulf of Maine northern shrimp (Pandalus borealis) once supported a significant winter fishery for the Gulf of Maine (GOM). Although the shrimp fishery is not comparable to the lobster business, it provided fishermen and many coastal communities jobs and incomes in winters after lobster seasons. However, a moratorium has been put on the shrimp fishery since 2014 due to record low population abundance and perceived recruitment failures. The recruitment failures have been correlated with warming water temperatures over the past decade. The GOM has been recognized as experiencing rapid warming as a result of global climate change. …

Marine Aquaculture In Maine: Understanding Diverse Perspectives And Interactions At Multiple Scales, Melissa L. Britsch

Electronic Theses and Dissertations

Coastal oceans are changing and experiencing increased use. The social and ecological benefits of healthy coastal oceans are well documented and include habitats for marine species, storm protection, and recreational opportunities (MEA, 2005). As the impacts of human activities are recognized, questions about how ocean spaces should be used are becoming more common. These questions are complex and involve many tradeoffs. Understanding the values people hold about uses, and how activities and ecosystems overlap, is critical for weighing tradeoffs and improving future management. I use the northeastern U.S. state of Maine to study human interactions with coastal oceans. Maine is …

Prehistory Of The Ica-Nazca Littoral, Peru, Patrick Henry Carmichael, Alana Cordy-Collins

Andean Past Special Publications

Maritime resources played a significant economic role in the prehistoric coastal communities of Central and Northern Peru, and, prior to the current study, it was reasonable to assume they were equally important on the South Coast. In the 1980s, researchers postulated that the Nasca culture of the Early Intermediate Period was a state-level society based on inland agriculture, heavily augmented by aquatic foodstuffs gathered and processed at coastal settlements. Carmichael calls this the Nasca Maritime Hypothesis. It envisioned permanent, ocean front towns providing massive amounts of marine resources to inland centers, in exchange for agricultural produce. The research reported here …

Evaluating Seafood Distribution Channels In The Atlantic Sea Scallop And Northeast Multispecies Groundfish Fisheries, Amanda Fall

Electronic Theses and Dissertations

Federal fisheries policy in the United States aims to balance resource conservation with maximum sustainable use. Catch shares are a quota-based management tool that are being increasingly deployed to achieve this ambitious goal. One perceived benefit of catch shares is that they give fishermen control of their catch so they will have the latitude to pursue the most profitable marketing arrangements. Using a mixed-methods approach, this research seeks to (1) describe and document the different marketing strategies that commercial fishermen in the Northeast Multispecies Groundfish and Atlantic Sea Scallop fisheries are using to sell their catch; and (2) estimate the …

Maine Cooperative Fish And Wildlife Research Unit And Department Of Wildlife, Fisheries, And Conservation Biology 2020 Report To Cooperators, Maine Cooperative Fish And Wildlife Research Unit, Cynthia S. Loftin, Rena A. Carey

General University of Maine Publications

The Maine Cooperative Fish and Wildlife Research Unit and the University of Maine Department of Wildlife, Fisheries, and Conservation Biology are pleased to summarize the past year’s research accomplishments and activities in this annual report. Together, we have collaborated with scientists from State and Federal agencies, universities, and non-governmental organizations on 37 research projects presented in the pages that follow. These collaborative relationships enable us to pose a variety of research questions in interdisciplinary studies to address the resource management information needs of our research sponsors and to advance science in wildlife and fisheries ecology, management, and conservation. We value …

Maine Conservation In An Age Of Global Climate Change, Richard Judd

Maine Policy Review

Maine has been a key player in one of the most dramatic changes in conservation strategy since Gifford Pinchot coined the term in the 1890s as private nonprofit land trusts have become essential to the conservation movement in the state. Land trusts spearheaded the new approach to conservation by drawing together landowners, philanthropic organizations, state and federal agencies, older conservation organizations, and most importantly, ordinary citizens. Given its prominence in the land-trust movement, Maine has provided leadership in a second revolutionary trend as trust managers embraced the emerging science of ecosystem management.

Hydro-Climatic Dynamics Of Lake Watershed Systems In A Changing Climate, Mussie Tekie Beyene

Electronic Theses and Dissertations

In the northern hemisphere, winter climate conditions are showing dramatic year-to-year swings. To date, implications of a changing winter climate pattern on individual or regional lakes are poorly understood, particularly in cold regions where seasonal ice appears on lake surfaces. This dissertation investigates the significance of yearly winter climate condition on the health and function of freezing lakes by modeling and characterizing the response of lake ice phenology (and related socio-ecological systems) to winter weather-climate variability. In Chapter 2, several case studies on winter limnology are reviewed to develop a tentative socio-ecological framework that demonstrates the local and regional implications …

Evaluating Satellite Estimates Of Particulate Backscatter In The Global Open Ocean Using Autonomous Profiling Floats, K. M. Bisson, E. Boss, T. K. Westberry, M. J. Behrenfeld

Marine Sciences Faculty Scholarship

Satellite retrievals of particulate backscattering (bbp) are widely used in studies of ocean ecology and biogeochemistry, but have been historically difficult to validate due to the paucity of available ship-based comparative field measurements. Here we present a comparison of satellite and in situ bbp using observations from autonomous floats (n = 2,486 total matchups across three satellites), which provide bbp at 700 nm. With these data, we quantify how well the three inversion products currently distributed by NASA ocean color retrieve bbp. We find that the median ratio of satellite derived bbp to float bbp ranges from 0.77 to 1.60 …

Deep Benthic Coral Habitats Of Glacier Bay National Park And Preserve, Alaska, Elise C. Hartill

Electronic Theses and Dissertations

Glacier Bay National Park and Preserve in Southeast Alaska is a system of fjords that presents an ideal natural laboratory to study terrestrial, aquatic and marine patterns of succession due to its unique and recent history of deglaciation. The patterns of deep benthic community assemblages in the fjords of Glacier Bay were investigated by quantitative assessment of underwater photo-quadrats collected using a remotely operated vehicle. The percent cover and diversity of species were lowest near the glaciated heads of the fjords and highest in the Central Channel and at the mouths of the fjords of Glacier Bay, where oceanographic conditions …

"The Dream Is In The Process:" Environmental Racism And Environmental Justice In Boston, 1900 To 2000, Michael J. Brennan

Electronic Theses and Dissertations

The following work explores the evolution of a resident-directed environmental activism that challenged negative public perception to redevelop their community. Beginning in the 1950s, city leaders justified the dislocation of non-white residents from Boston’s South End with the argument that they failed to maintain personal property and degraded community institutions. Most of these minority residents were forced to move to Roxbury. From 1963 to 1983, Roxbury lost 2,200 housing units. The vacant lots led to illegal dumping, and increased toxicity in the air, water, and soil from undesirable land use businesses such as asphalt plants. As a result, banks, supermarkets …

Assessing The Effectiveness Of Attractants To Increase Detection Probabilities In Northeastern Mammals, Michael Buyaskas

Honors College

A primary problem with camera trapping in wildlife occupancy studies is the failure to detect an animal when it is present at the site. My objective was to determine the optimal attractant setup for maximizing detection probabilities of northeast mammalian communities. I carried out an camera trapping project in northern Maine, USA from August to November 2018, and tested 3 distinct attractant setup. Sampling stations consisted of four camera units, and each sampling unit constituted either a treatment or a control: 1) bait + lure (treatment), 2) bait only (treatment), 3) lure only (treatment), and 4) camera only (control). Data …

Maine Cooperative Fish And Wildlife Research Unit And Department Of Wildlife, Fisheries, And Conservation Biology 2018 Report To Cooperators, Maine Cooperative Fish And Wildlife Research Unit, University Of Maine Department Of Wildlife, Fisheries, And Conservation Biology

General University of Maine Publications

The Maine Cooperative Fish and Wildlife Research Unit and the University of Maine Department of Wildlife, Fisheries, and Conservation Biology summarized the past year’s research, accomplishments, and activities in this annual report.

A Histological Assessment Of The Effects Of Elevated Temperature And Nitrogen On The Symbiodinium Of Palythoa Toxica (Walsh And Bowers 1971), Molly Westbrook

Honors College

Coral reefs around the world are suffering mass bleaching events caused by a combination of stressors, including rising ocean temperatures, acidity, pollution, increased suspended sediments, and increasing nitrogen levels. Corals harbor a complex microbial ecosystem consisting of bacteria, and algal symbionts known as Symbiodinium. This study examines the effects of elevated temperature, a known cause of bleaching, and elevated nitrogen, an increasingly important potential stressor for reefs, on the Symbiodinium of a zoanthid coral, Palythoa toxica. A total of 65 polyps were subjected to 5 different water treatments of 2 levels of elevated nitrogen, and 2 levels of …

From Maya Pyramids To Paleoindian Projectile Points: The Importance Of Public Outreach In Archaeology, D Clark Wernecke, Thomas J. Williams

Journal of Archaeology and Education

Public outreach in archaeology can have a valuable impact on education, culture, society and even on the economy. However, it should not be relegated to the addendum of our research projects. Here we present two case studies that the authors have been actively involved in where outreach was a central part of the investigations. Following this, we outline a basic framework for conducting outreach in both the short- and long-term. While these are not perfect examples, they are intended to get archaeologists, as a community, thinking about the real and practical implications of conducting public outreach. Beyond the educational value, …

Implications Of Body Size And Habitat Distribution Of Carcinus Maenas For Predation On Mytilus Edulis In The Gulf Of Maine, Mckenzie Thompson

Honors College

The blue mussel, Mytilus edulis, is a commercially important species along the Gulf of Maine. Its rapid decline in population size over the last forty years has led many researchers to question if the invasive green crab, Carcinus maenas, is affecting its distribution. The increase in annual mean water temperature, due to global climate change, has led many to fear an expansion of the green crab’s range and an increase in population density among areas they currently inhabit. The Damariscotta River in Walpole, Maine offers a unique thermal gradient to study the effects of temperature on green crab distribution, abundance, …

The Relative Importance Of Aquatic And Terrestrial Variables For Frogs In An Urbanizing Landscape: Key Insights For Sustainable Urban Development, Nélida R. Villaseñora, Don A. Driscoll, Philip Gibbons, Aram J K Calhoun, David B. Lindenmayer

Publications

Globally, urbanization threatens ∼950 amphibian species with extinction. Yet a lack of knowledge on the factors influencing common and infrequently encountered species in landscapes that are under increasing pressure from urban development is limiting effective conservation. We examined the relative importance of aquatic variables (pond) and terrestrial variables (at three spatial scales: 10 m, 100 m and 1 km), for commonly and infrequently encountered frogs in an urbanizing forested landscape in southeastern Australia. Species richness and the occurrence of four common species were influenced by the aquatic environment (water body size, aquatic vegetation). Species richness also decreased with increasing urbanization …

Chemical And Non-Chemical Control Of Potato Pink Rot, Xuemei (Missi) Zhang

Electronic Theses and Dissertations

Pink rot of potato (Solanum tuberosum) is a widespread soilborne disease that causes significant losses in the field and storage. It is caused by Phytophthora erythroseptica (Pethybr.), an oomycete pathogen that produces sexual spores that can survive in soil for years. The management of pink rot mainly relies on chemical control. However, the most effective chemical in pink rot control, mefenoxam, is losing its efficacy owing to the development of mefenoxam resistance in P. erythroseptica. To evaluate alternative fungicides (including chemical and biological fungicides) to mefenoxam in pink rot control, two greenhouse experiments and three field trials …

Highly Seasonal Reproduction In Desmophyllum Dianthus From The Northern Patagonian Fjords, Keri Feehan

Electronic Theses and Dissertations

The purpose of this study was to determine the basic reproductive biology and seasonality of the Patagonian fjord coral Desmophyllum dianthus. Desmophyllum dianthus is a deep-sea solitary scleractinian found throughout the world’s oceans and an important benthic habitat builder. The Chilean Patagonian fjords are the only known location where this species occurs >50 m and thus are the only place to collect samples efficiently, effectively and economically. Corals were collected via SCUBA approximately every three months (when conditions permitted) from August 2012 to September 2013 from three sites within the Northern Patagonian fjords – Lilihuape (n=76) and Punta Huinay …

Thoreau Fellowship Records, 1960-, Special Collections, Raymond H. Fogler Library, University Of Maine

Finding Aids

Records of the Thoreau Fellowship, a society with its headquarters in Maine. The society encourages publication and activity in the fields of history, conservation, preservation of natural resources, and other interests of Henry David Thoreau. Included are manuscripts of writings, publications, pamphlets, reprints, and photos.

Mendall (Howard Lewis) Ornithology Papers, 1898-1984, Special Collections, Raymond H. Fogler Library, University Of Maine

Finding Aids

Professor Howard L. Mendall was appointed to the University of Maine faculty in Wildlife Resources in 1937. He was a leader in the Cooperative Wildlife Research Unit and was affiliated with the U.S. Department of the Interior.

The papers of Professor Mendall concern primarily his research on birds and in particular ducks. The collection consists mainly of publications (articles, reprints, journals). Some manuscript materials are present along with field note cards.

Rapid: Ecological Resistance Of Multiply Stressed Populations: The Response Of Tidal Marsh Birds And Plants To Hurricane Sandy, Brian J. Olsen, Chris S. Elphick, Greg Shriver

University of Maine Office of Research Administration: Grant Reports

All animal and plant populations can weather change. However, the amount of environmental change a population can absorb is likely to depend upon other, past and ongoing stresses that the population experiences. This project will test whether the ability of populations of native plants and animals in coastal marshes to withstand the recent, extreme storm Hurricane Sandy was greater or less in marshes more subject to past stresses. Researchers will compare the abundances of marsh plants and animals before and after the storm and test whether vulnerability was greater in more specialized species or in marshes surrounded by development, invaded …

A Descriptive Study Of Forensic Implications Of Raccoon Scavenging In Maine, Ashley Hannigan

Honors College

This thesis is a case study of winter raccoon scavenging in Maine. The data used for my analysis came from a National Institute of Justice funded project on Regional Taphonomy done by Marcella Sorg from 2007 to 2012 (Sorg, 2013). I analyzed the photographic and videographic data from one pig cadaver site and identified raccoon scavenging “events.” This term is used to describe any period of time that one or more raccoons are scavenging. These events were then analyzed to investigate possible associations between scavenging behaviors and environmental variables, although none were positively identified. I adapted a method of describing …

Effects Of Buckthorn (Rhamnus Cathartica And Rhamnus Frangula) On Native Flora Functional Traits, Alexandra Perry

Honors College

Invasive plant species are currently a threat to native species and communities,

and two major challenges facing scientists today are trying to figure out how to deal with the invasive plants and trying to pinpoint their effects on the native communities. While some methods of removal have been effective, it is still unclear how the invasive plants affect the natives. Two species of the shrub buckthorn are invasive in the United States and both are causing problems in the state of Maine. I studied the native plants in areas with and without buckthorn to determine the effects of buckthorn on …

Maine's Sustainability Science Initiative, Michael Eckardt, Vicki Nemeth, David Hart

University of Maine Office of Research Administration: Grant Reports

Goals: Maine's Sustainability Science Initiative (SSI) seeks to catalyze and expand the state's interdisciplinary research capacity for understanding the coupled dynamics of social-ecological systems (SES) and determining how such knowledge can best inform stakeholders and their decision-making processes. The core SSI objective is to create a new statewide Center for Sustainability Solutions (CSS) where place-based systems research, knowledge to action focus, and strong stakeholder partnerships will serve as a testbed for developing solutions to sustainable development challenges in and beyond Maine. The research focuses on three interacting drivers of landscape change (urbanization, forest ecosystem management, and climate change) that affect …

Similarity Of Trajectories Taking Into Account Geographic Context, Maike Buchin, Somayeh Dodge, Bettina Speckmann

Journal of Spatial Information Science

The movements of animals, people, and vehicles are embedded in a geographic context. This context influences the movement and may cause the formation of certain behavioral responses. Thus, it is essential to include context parameters in the study of movement and the development of movement pattern analytics. Advances in sensor technologies and positioning devices provide valuable data not only of moving agents but also of the circumstances embedding the movement in space and time. Developing knowledge discovery methods to investigate the relation between movement and its surrounding context is a major challenge in movement analysis today. In this paper we …

Rapid: Natural Laboratories In The Chilean Fjords: Studying Reproduction And Development In Emergent Deep-Sea Corals, Rhian G. Waller

University of Maine Office of Research Administration: Grant Reports

Intellectual Merit

The northern Patagonian fjords lie on the interface between the high Andes Mountains in the east and the South Pacific Ocean, formed thousands of years ago through erosive glacial activity and tectonic sinking. Around 12,000 years ago the icefields in the Chiloé Interior Sea began to open, leaving behind over 15,000km2 of fjords, channels and gulfs. The waters within the fjords are influenced by strong tides, large volumes of freshwater runoff, and upwelling of deep-ocean waters as well as steep climatic gradients from north to south. This dynamic environment has resulted in extremely high biodiversity and endemism, yet …

Interdisciplinary Research And Environmental Law, Caroline L. Noblet, Dave Owen

Publications

This Article considers the involvement of environmental law researchers in interdisciplinary research. Using a survey and a series of unstructured interviews, we explore environmental law professors’ level of interest in such research; the extent of their engagement in it; and the inducements and barriers they perceive to such research. We conclude that levels of engagement in such research are probably lower than they ought to be, and we therefore recommend steps that individuals and institutions could take to facilitate more and better interdisciplinary work. More generally, we conclude that some common critiques of interdisciplinary legal research rest on assumptions that …