Stephen Kasperski
National Marine Fisheries Service
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Featured researches published by Stephen Kasperski.
Coastal Management | 2016
Amber Himes-Cornell; Stephen Kasperski
abstract Over recent years, fisheries managers have been going through a paradigm shift to prioritize ecosystem-based management. With this comes an increasing need to better understand the impacts of fisheries management decisions on the social well-being and sustainability of fishing communities. This article summarizes research aimed at using secondary data to develop socioeconomic and fisheries involvement indices to measure objective fishing community well-being in Alaska. Data from more than 300 communities in Alaska were used to create a database of socioeconomic and fisheries involvement indices of objective well-being and adaptability for Alaska communities dependent on marine resources. Each index was developed using a principal components factor analysis to assess the relative position of each community compared to all other communities in Alaska. We find that creating performance measures, such as the indices presented here, provides a useful way to track the status of socioeconomic conditions and fisheries involvement by communities over time.
Ecosystem Health and Sustainability | 2017
Kirstin K. Holsman; Jameal F. Samhouri; Geoffrey Cook; Elliott L. Hazen; Erik Olsen; Maria Khorsand Dillard; Stephen Kasperski; Sarah Gaichas; Christopher R. Kelble; Mike Fogarty; Kelly S. Andrews
Abstract Risk assessments quantify the probability of undesirable events along with their consequences. They are used to prioritize management interventions and assess tradeoffs, serving as an essential component of ecosystem‐based management (). A central objective of most risk assessments for conservation and management is to characterize uncertainty and impacts associated with one or more pressures of interest. Risk assessments have been used in marine resource management to help evaluate the risk of environmental, ecological, and anthropogenic pressures on species or habitats including for data‐poor fisheries management (e.g., toxicity, probability of extinction, habitat alteration impacts). Traditionally, marine risk assessments focused on singular pressure‐response relationships, but recent advancements have included use of risk assessments in an context, providing a method for evaluating the cumulative impacts of multiple pressures on multiple ecosystem components. Here, we describe a conceptual framework for ecosystem risk assessment (), highlighting its role in operationalizing , with specific attention to ocean management considerations. This framework builds on the ecotoxicological and conservation literature on risk assessment and includes recent advances that focus on risks posed by fishing to marine ecosystems. We review how examples of s from the United States fit into this framework, explore the variety of analytical approaches that have been used to conduct s, and assess the challenges and data gaps that remain. This review discusses future prospects for s as decision‐support tools, their expanded role in integrated ecosystem assessments, and the development of next‐generation risk assessments for coupled natural–human systems.
Ices Journal of Marine Science | 2017
Stephani Zador; Sarah Gaichas; Stephen Kasperski; Colette L. Ward; Rachael E. Blake; Natalie C. Ban; Amber Himes-Cornell; J. Zachary Koehn
Marine ecosystems are complex, and there is increasing recognition that environmental, ecological, and human systems are linked inextricably in coastal regions. The purpose of this article was to integrate environmental, ecological and human dimensions information important for fisheries management into a common analytical framework. We then used the framework to examine the linkages between these traditionally separate subject areas. We focused on synthesis of linkages between the Gulf of Alaska marine ecosystem and human communities of practice, defined as different fisheries sectors. Our specific objective was to document the individual directional linkages among environmental, ecological, and human dimensions variables in conceptual models, then build qualitative network models to perform simulation analyses to test how bottom-up and top-down perturbations might propagate through these linkages. We found that it is both possible and beneficial to integrate environmental, ecological, and human dimensions information important for fisheries into a common framework. First, the conceptual models allowed us to synthesize information across a broad array of data types, representing disciplines such as ecology and economics that are more commonly investigated separately, often with distinct methods. Second, the qualitative network analysis demonstrated how ecological signals can propagate to human communities, and how fishery management measures may influence the system. Third, we found that incorporating multi-species interactions changed outcomes because the merged model reversed some of the ecological and human outcomes compared with single species analyses. Overall, we demonstrated the value of linking information from the natural and social sciences to better understand complex social-ecological systems, and the value of incorporating ecosystem-level processes into a traditionally single species management framework. We advocate for conceptual and qualitative network modelling as efficient foundational steps to inform ecosystem-based fisheries management.
Archive | 2015
Amber Himes-Cornell; Stephen Kasperski; Keeley Kent; C. M. Maguire; Michael A. Downs; Stephen Weidlich; Suzanne M. Russell
......................................................................................................................... i LIST OF FIGURES ............................................................................................................ v LIST OF TABLES ........................................................................................................... xiv EXECUTIVE SUMMARY ........................................................................................... xxvi
Fisheries Research | 2015
Amber Himes-Cornell; Stephen Kasperski
Marine Policy | 2015
Eric Thunberg; John Walden; Juan J. Agar; Ron Felthoven; Abigail Harley; Stephen Kasperski; Jean Lee; Todd Lee; Aaron Mamula; Jessica Stephen; Andy Strelcheck
Coastal Management | 2016
Daniel S. Holland; Stephen Kasperski
Archive | 2014
Daniel S. Holland; Eric M. Thunberg; Juan J. Agar; Scott Crosson; Chad Demarest; Stephen Kasperski; Lawrence Perruso; Erin Steiner; Jessica Stephen; Andy Strelcheck; Mike Travis
Archive | 2014
John Walden; Juan J. Agar; Ron Felthoven; Abigail Harley; Stephen Kasperski; Jean Lee; Todd Lee; Aaron Mamula; Jessica Stephen; Andy Strelcheck; Eric M. Thunberg
Archive | 2013
Ronald G. Felthoven; Stephen Kasperski