Jin Di

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Jin

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Di

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0000-0002-6403-7983

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Economic impact of the 2005 red tide event on commercial shellfish fisheries in New England

( 2007-10-04) Jin, Di ; Thunberg, Eric M. ; Hoagland, Porter

Over the last several decades, harmful algal bloom (HAB) events have been observed in more locations than ever before throughout the United States. The 2005 bloom of Alexandrium fundyense was the most widespread and intense in New England waters since a similar event more than three decades ago. In this study, using historical data from the National Marine Fisheries Service, the Massachusetts Division of Marine Fisheries, and other sources, we develop estimates of the direct economic impacts of the 2005 event on commercial shellfish fisheries in Maine and Massachusetts. Results of our regression analyses suggest that the 2005 event had broad spatial and temporal effects on the shellfish market. In response to a supply shortage resulting from local closures, there was an increase in shellfish imports to New England during the red tide. Further, shellfish closures in Maine were the most likely cause of observable price changes on the Fulton Fish Market in New York.
Editorial: Oceanobs19: An ocean of opportunity

(Frontiers Media, 2019-09-06) Speich, Sabrina ; Lee, Tong ; Muller-Karger, Frank E. ; Lorenzoni, Laura ; Pascual, Ananda ; Jin, Di ; Delory, Eric ; Reverdin, Gilles ; Siddorn, John ; Lewis, Marlon R. ; Marba, Nuria ; Buttigieg, Pier Luigi ; Chiba, Sanae ; Manley, Justin ; Kabo-Bah, Amos Tiereyangn ; Desai, Kruti ; Ackerman, Abby

The OceanObs conferences are held once every 10 years for the scientific, technical, and operational communities involved in the planning, implementation, and use of ocean observing systems. They serve to communicate progress, promote plans, and to define advances in ocean observing in response to societies' needs. Each conference provides a forum for the community to review the state of the ocean observing science and operations, and to define goals and plans to achieve over the next decade.
Development of an integrated economic and ecological framework for ecosystem-based fisheries management in New England

( 2012-10) Jin, Di ; Hoagland, Porter ; Dalton, Tracey M. ; Thunberg, Eric M.

We present an integrated economic-ecological framework designed to help assess the implementation of ecosystem-based fisheries management (EBFM) in New England. We develop the framework by linking a computable general equilibrium (CGE) model of a coastal economy to an end-to-end (E2E) model of a marine food web for Georges Bank. We focus on the New England region using coastal county economic data for a restricted set of industry sectors and marine ecological data for three top level trophic feeding guilds: planktivores, benthivores, and piscivores. We undertake numerical simulations to model the welfare effects of changes in alternative combinations of yields from feeding guilds and alternative manifestations of biological productivity. We estimate the economic and distributional effects of these alternative simulations across a range of consumer income levels. This framework could be used to extend existing methodologies for assessing the impacts on human communities of groundfish stock rebuilding strategies, such as those expected through the implementation of the sector management program in the US northeast fishery. We discuss other possible applications of and modifications and limitations to the framework.
Managing tsunamis through early warning systems : a multidisciplinary approach

( 2010-11) Jin, Di ; Lin, Jian

This study attempts to identify the key factors that will make a tsunami warning system most effective, to develop a framework in which results of natural science and engineering research can be effectively integrated into coastal natural hazard planning, and to develop a numerical example that illustrates how benefit-cost analysis may be used to assess early warning systems. Results of the study suggest that while the science of tsunami wave propagation and inundation is relatively advanced, our knowledge on the relationships between tsunami generation and undersea earthquakes, volcanic eruptions, and landslides remains poor, resulting in significant uncertainties in tsunami forecasting. Probabilities of damaging tsunamis for many coastal regions are still unknown, making tsunami risk assessment and management difficult. Thus it is essential to develop new techniques to identify paleo-tsunami events and to compile and develop size and frequency information on historical tsunamis for different locations. An effective tsunami early warning system must include not only the ocean technologies for accurately detecting an emerging tsunami, but also a civil communication system through which the population can be timely warned by the local government and other sources. Since minimizing the evacuation time is a key factor to make a warning system effective, adequate pre-event education and preparation of the population must be a critical component of the system. Results of a numerical example of the South Pacific region suggest that investments in a tsunami warning system in the region may lead to significant economic benefits.
Mesopelagic-epipelagic fish nexus in viability and feasibility of commercial-scale mesopelagic fisheries

(Wiley, 2022-07-20) Kourantidou, Melina ; Jin, Di

While considerable scientific uncertainties persist for mesopelagic ecosystems, the fishing industry has developed a great interest in commercial exploitation with improved technologies as part of their search for new sources of feed for fishmeal and fish oil for aquaculture, which will intensify with the planet's growing population. The multiple uncertainties surrounding the ecosystem structure and particularly the size of biomass, hinder a good understanding of the risks associated with large-scale exploitation, which is needed for a management framework for sustainable ocean uses. Despite concerns regarding irreversible losses triggered by commercial fishing, work exploring the vulnerability of mesopelagic fish to harvesting is largely missing. This study investigates the economic feasibility of mesopelagic fishing which is the primary driver for any possible future expansion. Using very limited information currently available, we conduct a high-level assessment focusing on key ecological and economic interactions and develop an initial understanding of the economic feasibility of commercial harvesting for mesopelagic fish in the coming years. We conduct simulations using a classical bioeconomic model that captures two species groups, mesopelagic and epipelagic fish, using a wide range of price and cost parameters. We analyze different scenarios for the economic profitability of the fishery in a regional fishery management context. The results of our study highlight the importance of better understanding key biological and ecological mechanisms and parameters which can in turn help inform policies aimed at protecting the mesopelagic.
Scaling the benefits of and risks to the ecosystem services of the midwater

( 2018-09) Jin, Di ; Hoagland, Porter

The midwater is renowned for its unusual life forms, including 13 species of bristlemouths, which are thought to be the most numerous vertebrates on earth. Irigoien et al. (2014) have raised the median estimate of midwater fish biomass by an order of magnitude to ~11x109T. Some observers have suggested that these fish constitute an enormous potential source of pro-tein that literally could “feed the world.” Diel vertical migrations of zooplankton lead to the consumption of epipelagic phytoplankton, and the zooplankton, in turn, are consumed by the midwater’s fish. This ecological cycle comprises a central element of a biological “carbon pump” that leads eventually to the very long-term sequestration of carbon on the deep seabed. While the net amounts of carbon sequestered in this way are highly uncertain, estimates range between 4-12x109T annually. In April 2018, a formal international conference will initiate work on a new Framework Con-vention under the law of the sea, focusing on the conservation and sustainable use of marine biological diversity in areas beyond national jurisdiction (the so-called BBNJ Convention). De-spite a growing recognition by marine scientists of the importance of the midwater, its ecosys-tem services have been essentially ignored during these discussions. Here, we report on ap-proaches to estimating the scales of the economic values of the midwater’s ecosystem services and the nature of anthropogenic risks to those services. An ultimate objective of this research is to strengthen the links between marine science and the emerging international discussions over the conservation of the biodiversity of the high seas. This poster was presented at the ICES Annual Science Conference 2018, "Theme Session A: Mesopelagic ecosystems: fish and invertebrate population biomass and biodiversity, and role in carbon flux," and it is identified in this Theme Session report: https://www.ices.dk/news-and-events/asc/asc2018/Documents/Session%20Reports/Theme%20session_A_report_onlineready.pdf
Modeling the Total Allowable Area for Coastal Reclamation : a case study of Xiamen, China

( 2013-03) Peng, Benrong ; Lin, Chenchen ; Jin, Di ; Rao, Huanhuan ; Jiang, Yuwu ; Liuc, Yan

This paper presents an analytical framework to estimate the Total Allowable Area for Coastal Reclamation (TAACR) to provide scientific support for the implementation of a coastal reclamation restriction mechanism. The logic of the framework is to maximize the net benefits of coastal reclamation subject to a set of constraints. Various benefits and costs, including the ecological and environmental costs of coastal reclamation, are systematically quantified in the framework. Model simulations are developed using data from Tongan Bay of Xiamen. The results suggest that the TAACR in Tongan Bay is 5.67 km2, and the area of the Bay should be maintained at least at 87.52 km2.
Supply-side approaches to the economic valuation of coastal and marine habitat in the Red Sea

(Elsevier, 2013-03-07) Hoagland, Porter ; Kite-Powell, Hauke L. ; Jin, Di ; Solow, Andrew R.

The degradation of natural fish habitat in the ocean implies lost economic benefits. These value losses often are not measured or anticipated fully, and therefore they are mainly ignored in decisions to develop the coast for industrial or residential purposes. In such circumstances, the ocean habitat and its associated ecosystem are treated as if they are worthless. Measures of actual or potential economic values generated by fisheries in commercial markets can be used to assess a conservative (lower-bound) value of ocean habitat. With this information, one can begin to compare the values of coastal developments to the values of foregone ocean habitat in order to help understand whether development would be justified economically. In this paper, we focus on the economic value associated with the harvesting of commercial fish stocks as a relevant case for the Saudi Arabian portion of the Red Sea. We describe first the conceptual basis behind supply-side approaches to economic valuation. Next we review the literature on the use of these methods for valuing ocean habitat. We provide an example based on recent research assessing the bioeconomic status of the traditional fisheries of the Red Sea in the Kingdom of Saudi Arabia (KSA). We estimate the economic value of ecosystem services provided by the KSA Red Sea coral reefs, finding that annual per-unit values supporting the traditional fisheries only are on the order of $7000/km2. Finally, we develop some recommendations for refining future applications of these methods to the Red Sea environment and for further research.
The value of scientific research on the ocean's biological carbon pump

(Elsevier, 2020-08-01) Jin, Di ; Hoagland, Porter ; Buesseler, Ken O.

The ocean's biological carbon pump (BCP) sequesters carbon from the surface to the deep ocean and seabed, constituting one of Earth's most valuable ecosystem services. Significant uncertainty exists surrounding the amounts and rates of organic carbon sequestered in the oceans, however. With improved understanding of BCP sequestration, especially its scale, world policymakers would be positioned to make more informed decisions regarding the mitigation of carbon emissions. Here, an analytical model of the economic effects of global carbon emissions—including scientific uncertainty about BCP sequestration—was developed to estimate the value of marine scientific research concerning sequestration. The discounted net economic benefit of a putative 20-year scientific research program to narrow the range of uncertainty around the amount of carbon sequestered in the ocean is on the order of $0.5 trillion (USD), depending upon the accuracy of predictions, the convexities of climate damage and economic output functions, and the initial range of uncertainty.
Applying portfolio management to implement Ecosystem-Based Fishery Management (EBFM)

( 2016-05-19) Jin, Di ; DePiper, Geret ; Hoagland, Porter

Portfolio management has been suggested as a tool to help implement ecosystem-based fisheries management (EBFM). The portfolio approach involves the application of financial portfolio theory to multispecies fishery management to account for species interdependencies, uncertainty, and sustainability constraints. By considering covariance among species, this approach allows economic risks and returns to be calculated across varying combinations of stock sizes. Tradeoffs between expected aggregate returns and portfolio risk can thus be assessed. We develop a procedure for constructing portfolio models to help implement EBFM in the northeastern United States, using harvest data from the National Marine Fisheries Service. Extending the work of Sanchirico et al. (2008), we propose a measure of excessive risk taking, which may be used by managers to monitor signals of non-optimal harvests. In addition, we conduct portfolio assessments of historical commercial fishing performance at different accounting stances: the large marine ecosystem, the New England region, and the community (fishing ports). We show that portfolio analysis could inform management at each level. Results of the study suggest that excessive risk taking is associated with overfishing, and risk management is therefore important for ensuring sustainability.
The value of harmful algal bloom predictions to the nearshore commercial shellfish fishery in the Gulf of Maine

( 2008-05-01) Jin, Di ; Hoagland, Porter

In this study, we develop a framework for measuring the value of harmful algal bloom (HAB) predictions. The framework captures the effects of both private and public responses to HABs. Using data from the New England nearshore commercial shellfish fishery and impact estimates for a large-scale HAB event in 2005, we illustrate how the potential value of HAB forecasts may be estimated. The results of our study suggest that the long-term value of a HAB prediction and tracking system for the Gulf of Maine is sensitive to the frequency of HAB events, the accuracy of predictions, the choice of HAB impact measures, and the effectiveness of public and private responses.
Attitudinal factors and personal characteristics influence support for shellfish aquaculture in Rhode Island (US) coastal waters

( 2018-03) Dalton, Tracey M. ; Jin, Di

This study explores public interests associated with shellfish aquaculture development in coastal waters of Rhode Island (US). Specifically, we examine (1) the levels of public support for (or opposition to) shellfish aquaculture development and (2) factors driving the levels of support, using survey data and ordinal logistic regressions. Results of the analysis identify several key attitudinal factors affecting individual’s support for shellfish aquaculture in Rhode Island (RI). The level of support is positively associated with attitudes related to shellfish aquaculture’s benefits to the local economy and its role as a nutritional food option, and negatively influenced by attitudes related to aquaculture farms’ effects on aesthetic quality and their interference with other uses. Findings highlight that support for (or opposition to) aquaculture in RI is driven more by attitudes associated with social impacts than by those associated with environmental impacts. The level of support is also affected by personal characteristics related to an individual’s participation in recreational activities. For instance, bicycle riders tend to be supportive of shellfish aquaculture while respondents who participate in sailing and birding are less supportive. By identifying the broader public’s interests in shellfish aquaculture, findings from this study and others like it can be used to address public concerns, incorporate public perceptions and attitudes into permitting decisions, and develop outreach targeted at specific stakeholder groups.
Risk averse choices of managed beach widths under environmental uncertainty

(Wiley, 2021-07-26) Jin, Di ; Hoagland, Porter ; Ashton, Andrew D.

Applying a theoretical geo-economic approach, we examined key factors affecting decisions about the choice of beach width when eroded coastal beaches are being nourished (i.e., when fill is placed to widen a beach). Within this geo-economic framework, optimal beach width is positively related to its values for hazard protection and recreation and negatively related to nourishment costs and the discount rate. Using a dynamic modeling framework, we investigated the time paths of beach width and nourishment that maximized net present value under an accelerating sea level. We then analyzed how environmental uncertainty about expected future beach width, arising from natural shoreline dynamics, intermittent large storms, or sea-level rise, leads to economic choices favoring narrower beaches. Risk aversion can affect a coastal property owner's choice of beach width in contradictory ways: the expected benefits of hazard protection must be balanced against the expected costs of repeated nourishment actions.
Stochastic frontier analysis of total factor productivity in the offshore oil and gas industry

( 2005-11) Managi, Shunsuke ; Opaluch, James J. ; Jin, Di ; Grigalunas, Thomas A.

We examine the impact of technological change on oil and gas exploration, development and production in the Gulf of Mexico over the past five decades. We analyze the effect of technological change on the production frontier using a unique field-level data set covering 1947 through 1998. We then develop estimates of the growth in total factor productivity (TFP) in the industry at the regional level from 1976 to 1995. To address the unique features of this marine resource industry, we include in our models some key geological variables such as water depth and field size. In addition, the results reveal that environmental regulation had a significantly negative impact on offshore production, although such impact has been diminishing over time.
An analysis of fishing vessel accidents in fishing areas off the northeastern United States

( 2005-02-17) Jin, Di ; Thunberg, Eric M.

Commercial fishing is one of the least safe occupations. Fishing vessel accident probability and vessel trip probability for fishing areas off the northeastern United States were modeled using logit regression and daily data from 1981 to 2000. Fishing vessel accident probability declined over the study period. Higher wind speeds are associated with greater accident probability. Medium size vessels had the highest accident probability before 1994. Within the study region, accident probability was lower in Southern New England and Mid-Atlantic waters than on Georges Bank and in the Gulf of Maine. Accidents are more likely to occur closer to shore than offshore. Accident probability is lower in spring and fall. Changes in fishery management in 1994 have not lead to a general increase in either accident or vessel trip probability. Although higher economic payoff (i.e., revenue of landings) induces more vessels to go fishing, this is not associated with an increase in accidents. The probability models are important building blocks in development and quantitative assessment of management mechanisms related to safety in the commercial fishing industry.
Lessening the hazards of Florida red tides: a common sense approach

(Frontiers Media, 2020-07-09) Hoagland, Porter ; Kirkpatrick, Barbara ; Jin, Di ; Kirkpatrick, Gary ; Fleming, Lora E. ; Ullmann, Steven G. ; Beet, Andrew R. ; Hitchcock, Gary ; Harrison, Kate K. ; Li, Zongchao C. ; Garrison, Bruce ; Diaz, Roberto E. ; Lovko, Vince

In the Gulf of Mexico, especially along the southwest Florida coast, blooms of the dinoflagellate Karenia brevis are a coastal natural hazard. The organism produces a potent class of toxins, known as brevetoxins, which are released following cell lysis into ocean or estuarine waters or, upon aerosolization, into the atmosphere. When exposed to sufficient levels of brevetoxins, humans may suffer from respiratory, gastrointestinal, or neurological illnesses. The hazard has been exacerbated by the geometric growth of human populations, including both residents and tourists, along Florida’s southwest coast. Impacts to marine organisms or ecosystems also may occur, such as fish kills or deaths of protected mammals, turtles, or birds. Since the occurrence of a severe Karenia brevis bloom off the southwest Florida coast three-quarters of a century ago, there has been an ongoing debate about the best way for humans to mitigate the impacts of this hazard. Because of the importance of tourism to coastal Florida, there are incentives for businesses and governments alike to obfuscate descriptions of these blooms, leading to the social amplification of risk. We argue that policies to improve the public’s ability to understand the physical attributes of blooms, specifically risk communication policies, are to be preferred over physical, chemical, or biological controls. In particular, we argue that responses to this type of hazard must emphasize maintaining the continuity of programs of scientific research, environmental monitoring, public education, and notification. We propose a common-sense approach to risk communication, comprising a simplification of the public provision of existing sources of information to be made available on a mobile website.
Business planning handbook for the ocean aquaculture of blue mussels

(Woods Hole Oceanographic Institution, 2003-09) Hoagland, Porter ; Kite-Powell, Hauke L. ; Jin, Di

For prospective growers of blue mussels (Mytilus edulis) in New England marine waters, this handbook is designed to be useful for assessing the structure of the market (including industrial organization and regulation), for making informed choices about organizational form, and for planning aquaculture business development. Importantly, we discuss methods for evaluating environmental and market risks. Where possible, we identify web-based and other sources of information to aid in business planning and in the design and operation of an ocean aquaculture business specializing in the production of blue mussels.
Tradeoffs in coastal and marine spatial planning for the US Northeast LME

( 2011-09-19) Hoagland, Porter ; Jin, Di
Shoreline change, seawalls, and coastal property values

( 2015-06-16) Jin, Di ; Hoagland, Porter ; Au, Donna K. ; Qiu, Jun

We investigate the effects of shoreline change and protective structures (seawalls) on home values, using data on residences sold between 2000 and 2010 in the coastal towns of Marshfield, Duxbury, and Plymouth, Massachusetts. These towns comprise shorelines that exhibit moderate rates of shoreline change, relative to other shorelines in the state, with extensive armoring. We investigate explicitly the effects of hard structural protection in combination with environmental amenities and hazards (distance to a beach, elevation of a property, location in a flood zone). We find that homeowners pay a premium in housing markets for nearshore properties protected by nature (higher elevations or more stable shorelines) or by humans (seawalls). The average marginal increase in nearshore property values associated with a 1m rise in elevation is 2 percent, a 1m (horizontal distance) decrease in the erosion rate is 0.2 percent, and location behind a seawall is 10 percent. The effects of erosion, elevation, and seawalls appear to be limited to properties located in close proximity to water or to oceanfront residences. Overall, the benefits of access to ocean amenities dominate the risks of exposures to hazards associated with shoreline change.
Determinants of the severity of cruise vessel accidents

( 2007) Talley, Wayne K. ; Jin, Di ; Kite-Powell, Hauke L.

This study investigates determinants of the property damage and injury severities of cruise vessel accidents. Detailed data of individual cruise vessel accidents for the 11-year time period 1991-2001 that were investigated by the U.S. Coast Guard were used to estimate cruise-vessel accident property damage and injury severity equations. The estimation results suggest that cruise vessel damage cost per vessel gross ton is greater for: allision, collision, equipment-failure, explosion, fire, flooding, and grounding cruise vessel accidents than for other types of accidents and a human cause. The accident injury severity is greater for ocean cruise than for inland waterway and harbor/dinner cruise vessel accidents and a human cause. The unit damage cost of $207 for explosion accidents is greater than that for other types of accidents. If the accident is caused by a human factor, the probability of non-fatal and fatal injuries increases by 0.0877 and 0.0077, respectively.

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