scholarly journals Fish harvesting advice under climate change: a risk-equivalent empirical approach

2020 ◽  
Author(s):  
Daniel E. Duplisea ◽  
Marie-Julie Roux ◽  
Karen L. Hunter ◽  
Jake Rice
Keyword(s):  
Climate Change ◽  
Empirical Relationship ◽  
Quantitative Model ◽  
Empirical Approach ◽  
Management Options ◽  
Greenland Halibut ◽  
External Variable ◽  
Fishing Strategies ◽  
Fishery Exploitation ◽  
Risk Equivalent

1AbstractThe rate of climate change (CC) has accelerated to the point where it now affects the mid-to long-term sustainability of fishing strategies. Therefore, it is important to consider practical and effective ways to incorporate CC into fisheries advice so that the advice can be considered conditioned to CC. We developed a quantitative model to characterise the empirical relationship between a variable affected by climate and fish production. We then used model projections as a foundation for a risk analysis of CC effects on harvesting of Greenland halibut Reinhardtius hippoglossoides in the Gulf of St Lawrence, Canada. The risk-based approach quantified a) the relative change in risk of a status quo fishing strategy under various CC scenarios, and b) the change in fishery exploitation rates required to achieve a management objective over a specified time period at a level of risk considered acceptable (risk equivalent fishery exploitation advice). This empirical approach can be used to develop risk-based advice for any other external variable that affects stock production in addition to climate-related variables and it can be applied in most situations where there is an index of stock biomass and fisheries catch. Shifting the focus from process-based understanding of the responses of fish stocks to CC to quantification of how CC-contributed uncertainty can alter the risks associated with different fishing strategies and/or management options, can ensure timely delivery of robust scientific advice for fisheries under non-stationary environmental conditions.

scholarly journals Fish harvesting advice under climate change: A risk-equivalent empirical approach

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0239503
Author(s):  
Daniel E. Duplisea ◽  
Marie-Julie Roux ◽  
Karen L. Hunter ◽  
Jake Rice
Keyword(s):  
Climate Change ◽  
Empirical Relationship ◽  
Empirical Approach ◽  
Management Options ◽  
Greenland Halibut ◽  
External Variable ◽  
Fish Stocks ◽  
Fishing Strategies ◽  
Fishery Exploitation ◽  
Risk Equivalent

The rate of climate change (CC) has accelerated to the point where it now affects the mid- to long-term sustainability of fishing strategies. Therefore, it is important to consider practical and effective ways to incorporate CC into fisheries advice so that the advice can be considered conditioned to CC. We developed a model to characterise the empirical relationship between a variable affected by climate and fish production. We then used model projections as a foundation for a risk analysis of CC effects on harvesting of Greenland halibut Reinhardtius hippoglossoides in the Gulf of St Lawrence, Canada. The risk-based approach quantified a) the relative change in risk of a status quo fishing strategy under various CC scenarios, and b) the change in fishery exploitation rates required to achieve a management objective over a specified time period at a level of risk considered acceptable (risk equivalent fishery exploitation advice). This empirical approach can be used to develop risk-based advice for any other external variable that affects stock production in addition to climate-related variables and it can be applied in most situations where there is an index of stock biomass and fisheries catch. Shifting the focus from process-based understanding of the responses of fish stocks to CC to quantification of how CC-contributed uncertainty can alter the risks associated with different fishing strategies and/or management options, can ensure timely delivery of robust scientific advice for fisheries under non-stationary environmental conditions.

scholarly journals Revisiting the Functional Zoning Concept under Climate Change to Expand the Portfolio of Adaptation Options

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 273
Author(s):  
Samuel Royer-Tardif ◽  
Jürgen Bauhus ◽  
Frédérik Doyon ◽  
Philippe Nolet ◽  
Nelson Thiffault ◽  
...  
Keyword(s):  
Climate Change ◽  
Multiple Use ◽  
Management Options ◽  
Ecological Processes ◽  
Adaptation Measures ◽  
Good Communication ◽  
Management Objectives ◽  
Functional Zoning ◽  
Wide Range ◽  
Adaptation Options

Climate change is threatening our ability to manage forest ecosystems sustainably. Despite strong consensus on the need for a broad portfolio of options to face this challenge, diversified management options have yet to be widely implemented. Inspired by functional zoning, a concept aimed at optimizing biodiversity conservation and wood production in multiple-use forest landscapes, we present a portfolio of management options that intersects management objectives with forest vulnerability to better address the wide range of goals inherent to forest management under climate change. Using this approach, we illustrate how different adaptation options could be implemented when faced with impacts related to climate change and its uncertainty. These options range from establishing ecological reserves in climatic refuges, where self-organizing ecological processes can result in resilient forests, to intensive plantation silviculture that could ensure a stable wood supply in an uncertain future. While adaptation measures in forests that are less vulnerable correspond to the traditional functional zoning management objectives, forests with higher vulnerability might be candidates for transformative measures as they may be more susceptible to abrupt changes in structure and composition. To illustrate how this portfolio of management options could be applied, we present a theoretical case study for the eastern boreal forest of Canada. Even if these options are supported by solid evidence, their implementation across the landscape may present some challenges and will require good communication among stakeholders and with the public.

scholarly journals Identifying integrated options for agricultural climate change mitigation

2014 ◽  
Vol 6 (2) ◽  
pp. 192-211 ◽  
Author(s):  
John Tzilivakis ◽  
Kathleen Lewis ◽  
Andrew Green ◽  
Douglas Warner
Keyword(s):  
Climate Change ◽  
Climate Change Mitigation ◽  
Effective Means ◽  
Integrated Approach ◽  
Management Options ◽  
Content Type ◽  
Mitigation Options ◽  
Trade Offs ◽  
Environmental Objectives ◽  
Change Mitigation

Purpose – In order to achieve reductions in greenhouse gas (GHG) emissions, it is essential that all industry sectors have the appropriate knowledge and tools to contribute. This includes agriculture, which is considered to contribute about a third of emissions globally. This paper reports on one such tool: IMPACCT: Integrated Management oPtions for Agricultural Climate Change miTigation. The paper aims to discuss these issues. Design/methodology/approach – IMPACCT focuses on GHGs, carbon sequestration and associated mitigation options. However, it also attempts to include information on economic and other environmental impacts in order to provide a more holistic perspective. The model identifies mitigation options, likely economic impacts and any synergies and trade-offs with other environmental objectives. The model has been applied on 22 case study farms in seven Member States. Findings – The tool presents some useful concepts for developing carbon calculators in the future. It has highlighted that calculators need to evolve from simply calculating emissions to identifying cost-effective and integrated emissions reduction options. Practical implications – IMPACCT has potential to become an effective means of provided targeted guidance, as part of a broader knowledge transfer programme based on an integrated suite of guidance, tools and advice delivered via different media. Originality/value – IMPACCT is a new model that demonstrates how to take a more integrated approach to mitigating GHGs on farms across Europe. It is a holistic carbon calculator that presents mitigation options in the context other environmental and economic objectives in the search for more sustainable methods of food production.

scholarly journals Sediment Mining

2017 ◽  
Author(s):  
Homayoun Fathollahzadeh ◽  
Fabio Kaczala ◽  
Amit Bhatnagar ◽  
William Hogland
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Contaminated Sediments ◽  
Management Options ◽  
Metals Recovery ◽  
Environmental Footprints ◽  
Valuable Metals ◽  
Short And Long Term ◽  
Near Future

The main dilemma of contaminated sediments has been the proper management with reduced environmental footprints. Furthermore, by considering the fact that global warming and climate change may complicate the choice of management options, finding appropriate solutions become extremely critical. In the present work, mining of contaminated sediments to recover valuable constituents such as metals and nutrients is proposed as sustainable strategy, both through enhancing resilience of ecosystem and remediation. Contaminated sediments in the Oskarshamn harbor, southeast of Sweden were collected and analyzed through a modified sequential extraction in order to evaluate the feasibility of metals recovery. The results have shown that among different metals present in the sediments, Cu and Pb can be initially considered as economically feasible to recover. The shifting in the concept of dredging and further remediation of contaminated sediments towards sediment mining and recover of valuable metals can be considered in the near future as a sustainable strategy to tackle contaminated harbor/ports areas. However, it must be highlighted that short and long-term environmental impacts related to such activities should be addressed.

scholarly journals Management Options for Organic Winter Wheat Production under Climate Change

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Ralf Bloch ◽  
Jürgen Heß ◽  
Johann Bachinger
Keyword(s):  
Climate Change ◽  
Winter Wheat ◽  
Management Options ◽  
Wheat Production

scholarly journals The Climate Change Impact of Possible Municipal Solic Waste Management Scenarios in Estonia

2017 ◽  
pp. 78
Author(s):  
Harri Moora ◽  
Evelin Urbel-Piirsalu ◽  
Viktoria Voronova
Keyword(s):  
Climate Change ◽  
Waste Management ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Climate Change Impact ◽  
Municipal Waste ◽  
Management Scenarios ◽  
Management Options ◽  
Gas Emissions ◽  
Change Impact

Waste management has an influence on the greenhouse gas (GHG) formation. The emissions of greenhouse gases vary between the EU countries depending on waste treatment practices and other regional factors such us composition of waste. The aim of this paper was to examine, from a life-cycle perspective, Municipal Solid Waste (MSW) management in the context of greenhouse gas formation and to evaluate the possible reduction of climate change potential of alternative waste management options in Estonia. The paper summarises the results of a case study in Estonia, assessing the climate change impact by 2020 in terms of net greenhouse gas emissions from two possible management scenarios. As a result it can be concluded that better management of municipal waste and diversion of municipal waste away from landfills could significantly reduce the emissions of GHG and, if high rates of recycling and incineration with energy recovery are attained, the net greenhouse gas emissions may even become negative. It means that these waste management options can partly offset the emissions that occurred when the products were manufactured from virgin materials and energy was produced from fossil fuels. This is especially important concerning the climate change impact.

scholarly journals A Modelling Framework for Assessing Adaptive Management Options of Finnish Agrifood Systems to Climate Change

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
Heikki Sakari Lehtonen ◽  
Reimund Paul Rötter ◽  
Taru Irmeli Palosuo ◽  
Tapio Juhani Salo ◽  
Janne Antero Helin ◽  
...  
Keyword(s):  
Climate Change ◽  
Adaptive Management ◽  
Management Options ◽  
Modelling Framework

scholarly journals Increased Terrestrial Perturbations Modify Skeletal Properties and Mechanical Strength of Hard Corals

2016 ◽  
Vol 6 (4) ◽  
pp. 153 ◽  
Author(s):  
Shaaban A. Mwachireya ◽  
Tim R. McClanahan ◽  
Isabelle M. Cote ◽  
Brian E. Hartwick
Keyword(s):  
Climate Change ◽  
Coral Reef ◽  
Global Climate Change ◽  
Global Climate ◽  
High Porosity ◽  
Growth Forms ◽  
Management Options ◽  
Skeletal Density ◽  
Change Events ◽  
Hydrodynamic Energy

Skeleton properties determine coral survival by influencing the range of hydraulic conditions colonies can withstand, selection of suitable habitat, ability to compete for space and light, repair damage and the overall fitness and ecological success of scleractinian corals. Skeletal properties of 16 coral species comprising 3 growth forms collected from Kenyan coral reef lagoons were investigated and found to vary considerably not only between species but between reefs as well, with corals exposed to both sediment and nutrients showing consistent lower skeleton density and strength but high porosity compared to those from sediment-unaffected reefs. Further, high skeletal density and strength but low porosity values were measured in branching relative to other growth forms. The present findings also suggest that the negative effects of nutrients on skeleton properties may be counteracted by high hydrodynamic energy, resulting in stronger skeletons in high hydrodynamic energy-nutrient-polluted reef habitats relative to pristine reefs. These findings have important ecological and management implications with regard to the existence, persistence, productivity and protective value of reefs, damage risks, maintenance and conservation of biological diversity with respect to future global climate change events. Consequently, appropriate watershed, reef and fisheries management options the impacts of local anthropogenic stresses (sediments, nutrients, overexploitation) would be expected to alleviate the effects of these disturbances and have the potential to minimize future large-scale coral reef damage resulting from increased and frequent global climate change events, such as increased ocean acidification (due to elevated atmospheric CO2) and sea surface temperature.

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