Emergy evaluation of cropping, poultry rearing, and fish raising systems in the drawdown zone of Three Gorges Reservoir of China

Cheng, Hui; Chen, Chundi; Wu, Shengjun; Mirza, Zakaria A.; Liu, Zhimei

doi:10.1016/j.jclepro.2016.12.053

Cited by 94 publications

(37 citation statements)

References 34 publications

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“…However, in all evaluated managements the input of resources from the economy is much larger than the input of renewable resources, characteristics of the production in open or intensive systems which use large amounts of feed or high feed conversion. Similar results presented by Odum (2001), Cavalett et al (2006), andCheng et al (2017) suggest that this is probably a standard of aquaculture practice.…”

Section: Discussionsupporting

confidence: 82%

“…Garcia et al (2014) evaluated different densities and areas for dilution of the environmental load in tilapia cage farming and observed that a lower density negatively affects the efficiency of the system. This trend is evidenced in other studies that evaluated the sustainability of extensive aquaculture systems (Odum, 2001;Bastianoni, 2002;Cavalett et al, 2006;Vassallo et al, 2007;Cheng et al, 2017).…”

Section: Discussionmentioning

confidence: 59%

“…The value of EYR close to 1 in TRAD indicates that the systems were inefficient to incorporate emergy from local renewable resources in the production process (Brown and Ulgiati, 2004). This result also shows that TRAD management make available to society the same amount of emergy consumed in the tilapia production process and did not aggregate emergy to the final product, this means that the emergy yield is close to the same amount of purchased emergy (Li et al, 2011;Cheng et al, 2017). Although the use of periphyton and density reduction (TDS and LDS) increased EYR, values remained Fig.…”

Section: Discussionmentioning

confidence: 77%

“…In this way, the results obtained in the present study (Table 6) show that tilapia cage farming, using periphyton or not, is an activity with moderate impact. Other authors also have classified their aquaculture systems as an activity with moderate impact, independent of the intensification level (Odum, 2001;Bastianoni, 2002;Cavalett et al, 2006;Vassallo et al, 2007;Zhang et al, 2011;Cheng et al, 2017). However, the values of the LDS demonstrate that the decrease in stocking density is an efficient alternative to decrease the environmental load generated by the activity.…”

Section: Discussionmentioning

confidence: 99%

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Improving the sustainability of tilapia cage farming in Brazil: An emergy approach

David

Pinho

Garcia

2018

Journal of Cleaner Production

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a b s t r a c tThe accelerated and disorderly expansion of aquaculture can lead to economic, social, and environmental problems. In this sense, it is necessary to prioritize the adoption of practices that aim for sustainable production. The aims of the present study were to identify the contributions from nature and economy in the system of tilapia cage farming. In addition, emergy accounting was utilized to evaluate whether the use of periphyton as a complementary food and the reduction of storage density improve the sustainability of this production system. Three different production managements were evaluated and compared: using traditional stocking density adopted by farmers (80 kg/m 3 ) with 100% of the daily recommended feed and without substrates for periphyton (TRAD); traditional stocking density (80 kg/ m 3 ) with 50% of the daily recommended feed and with substrates for periphyton (TDS); lower density (40 kg/m 3 ) with 50% of the daily recommended feed and with substrates for periphyton (LDS). We calculated using emergy accounting the transformity (Tr), renewability (%R), emergy yield ratio (EYR), emergy investment ratio (EIR), emergy loading ratio (ELR), emergy exchange ratio (EER), and emergy sustainability index (ESI) of the distinct production managements. The results showed that tilapia cage farming is highly dependent on resources from economy, and feed is mainly responsible for this. Thus, the decrease in stocking density and feed rate, combined with the use of periphyton, improved all emergy indices evaluated. This occurred because there was a decrease in the use of resources from economy and increase in the use of renewable natural resources. The study shows through the emergy accounting that the use of periphyton to feed cultured fish combined with a reduction in artificial feed use and a decrease in the stocking density should be encouraged to promote the sustainability on tilapia cage farming.Published by Elsevier Ltd.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

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Improving the sustainability of tilapia cage farming in Brazil: An emergy approach

David

Pinho

Garcia

2018

Journal of Cleaner Production

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“…The related SFSC literature [4][5][6][7][8][9][10][11][12][13][14] allowed us to identify a research gap. The basic rationale for addressing the research subject includes an insufficient theoretical foundation for SFSCs, the lack of theoretical frameworks and backgrounds with a particular emphasis on ecological products, and the lack of simulation studies related to the optimization of activities and opportunities to achieve benefits in the implementation of the SFSC strategy, in which the starting point and leader is a producer of food products.…”

Section: Introductionmentioning

confidence: 99%

Benefit Optimization of Short Food Supply Chains for Organic Products: A Simulation-Based Approach

Tundys

Wiśniewski

2020

Applied Sciences

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Creating alternative supply chains can help increase economic and social benefits for all beneficiaries of the supply chain. Alternative short supply chains for organic products are considered when seeking optimal scenarios to obtain the highest profit for producers, with maximizing profit being one of the main reasons for taking up business within this type of supply chain strategy. The aim of this study was to clarify the ideas of short food supply chains (SFSCs) and the organic production of food products and to indicate how economic benefits can be achieved in individual markets. The identified research gaps include the lack of a strong theoretical basis, as well as the lack of empirical studies concerning the multi-objective optimization of the economic effects of producers using computer simulation methods. However, the aim of this research was to identify the activities within such structures that can produce economic effects and influence the competences and soft relationships between the organizations participating in the chains. The adopted research methods included a critical analysis of the literature and the use of information technology tools and computer simulation. We found that computer simulation methods can lead to better decisions (to increase manufacturer benefits) regarding how to service selected markets within the SFSC. The most important limitations are the small territorial scope of the research and the consideration of only three of the most frequently purchased and manufactured products in Poland. This study was a pilot study, which will be developed further by the authors, from both a territorial and product point of view.

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Strategic planning oriented to circular business models: A decision framework to promote sustainable development

et al. 2022

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Circular economy principles are usually dissociated from strategic planning practices, and there seems to be no guidance on how to decide on competitive strategies to establish circular business models. Therefore, this article aimed to propose a strategic planning decision framework oriented to circular business models (SPDF‐CBM) and test it by conducting a case study of a Brazilian company from the cosmetic sector. The SPDF‐CBM framework comprises five stages: (A) circular trends analysis; (B) circular vision and goals definition; (C) current circular business status; (D) competitive strategy for a circular economy definition; and (E) competitive strategies for a circular economy prioritization. Based on a number of tools to assist going through Stages A, B, and C, businesses get to know their current circular status and define their desired future state. In Stages D and E, businesses define their competitive strategy and spot circular business models (and strategies) they can pursue. After testing the proposed framework in a Brazilian startup from the cosmetic sector, results from SPDF‐CBM suggested that the startup pursues a competitive strategy based on differentiation and a CBM aimed at promoting renewable options. It was also pointed out that other CBMs in decreasing degree of fit with the business were maximizing material and energy efficiency, extending resource value and product life, pursuing sufficiency, and delivering functionality rather than ownership. By using the SPDF‐CBM framework, organizations can increase both their competitiveness and circularity at the same time.

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Emergy evaluation of cropping, poultry rearing, and fish raising systems in the drawdown zone of Three Gorges Reservoir of China

Cited by 94 publications

References 34 publications

Improving the sustainability of tilapia cage farming in Brazil: An emergy approach

Improving the sustainability of tilapia cage farming in Brazil: An emergy approach

Benefit Optimization of Short Food Supply Chains for Organic Products: A Simulation-Based Approach

Strategic planning oriented to circular business models: A decision framework to promote sustainable development

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