Search for: All records

This Indigenous-led project aims to better understand historical and contemporary ways in which Alaska Native Peoples steward salmon and the values connected to salmon stewardship. Indigenous Peoples have stewarded Alaska lands and waters for thousands of years yet have been largely excluded from western science and management systems. In this project, we utilize a participatory approach that allows for the equitable valuing of ideas and knowledges to document the breadth and depth of Yup'ik and Athabascan knowledge and governance systems in southwestern Alaska. We reshape research methodologies by centering Indigenous frameworks and methodologies, including circle dialogues and multi-generational interviews led by Indigenous scholars and students in their home communities and regions. In this paper, we share the Yup'ik and Athabascan values, knowledge, management, and governance mechanisms that can improve the long-term sustainability and equity of Alaska salmon systems. This research elevates the voices of Alaska Native salmon stewards and experts from the Kuskokwim Bay and the Kuskokwim River. We elaborate on five key themes that emerged from this research, including traditional Indigenous ways of life, Indigenous stewardship, self-determination, food and livelihood sovereignty, and ecosystem changes, and identify a more equitable and sustainable path forward for salmon and people in Alaska. 

Sensing films based on polymer–plasticizer coatings have been developed to detect volatile organic compounds (VOCs) in the atmosphere at low concentrations (ppm) using quartz crystal microbalances (QCMs). Of particular interest in this work are the VOCs benzene, ethylbenzene, and toluene which, along with xylene, are collectively referred to as BTEX. The combinations of four glassy polymers with five plasticizers were studied as prospective sensor films for this application, with PEMA-DINCH (5%) and PEMA-DIOA (5%) demonstrating optimal performance. This work shows how the sensitivity and selectivity of a glassy polymer film for BTEX detection can be altered by adding a precise amount and type of plasticizer. To quantify the film saturation dynamics and model the absorption of BTEX analyte molecules into the bulk of the sensing film, a diffusion study was performed in which the frequency–time curve obtained via QCM was correlated with gas-phase analyte composition and the infinite dilution partition coefficients of each constituent. The model was able to quantify the respective concentrations of each analyte from binary and ternary mixtures based on the difference in response time (τ) values using a single polymer–plasticizer film as opposed to the traditional approach of using a sensor array. This work presents a set of polymer–plasticizer coatings that can be used for detecting and quantifying the BTEX in air, and discusses the selection of an optimum film based on τ, infinite dilution partition coefficients, and stability over a period of time. 

ABSTRACT. Indigenous Peoples and salmon in the lands now called Alaska have been closely entwined for at least 12,000 years. Salmon continue to be central to the ways of life of Alaska Natives, contributing to physical, social, economic, cultural, spiritual, psychological, and emotional well-being. Salmon have also become important to Alaskan settlers. Our research and advisory team conducted a synthesis of what is known about these diverse human–salmon relationships, drawing on 865 published scientific studies; Indigenous knowledge; state, federal, and tribal data; archival materials; oral histories; and cross-cultural dialogs at working group meetings. Two important socio-cultural dimensions of salmon–people systems emerged from this synthesis as fundamentally important but largely invisible outside of Indigenous communities and the social science disciplines that work closely with these communities: (1) the deep relationships between Indigenous Peoples and salmon and (2) the pronounced inequities that threaten these relationships and stewardship systems. These deep relationships are evident in the spiritual, cultural, social, and economic centrality of salmon across time and cultures in Alaska. We describe Indigenous salmon stewardship systems for the Tlingit, Ahtna, and Central Yup'ik. The inequities in Alaska's salmon systems are evident in the criminalization and limitation of traditional fishing ways of life and the dramatic alienation of Indigenous fishing rights. The loss of fish camps and legal battles over traditional hunting and fishing rights through time has caused deep hardship and stress. Statewide, the commodification and marketization of commercial fishing rights has dispossessed Indigenous communities from their human and cultural rights to fishing ways of life; as a result, many rural and Indigenous youth struggle to gain access to fishing livelihoods, leaving many fishing communities in a precarious state. These deep relationships and relatively recent fractures have motivated a concerted effort by a group of committed Indigenous and western scholars to better understand the root causes and opportunities for redress, as well as to document the breadth of research that has already been conducted, in an effort to improve the visibility of these often-overlooked dimensions of our salmon systems.