Mediterranean mussel farming in Greece developed considerably during the last 40 years reaching a gross commodity product up to the limits of the country’s production capacity(35–40,000 tonnes/year).Despite the achi...Mediterranean mussel farming in Greece developed considerably during the last 40 years reaching a gross commodity product up to the limits of the country’s production capacity(35–40,000 tonnes/year).Despite the achievements in the sector’s growth,little or no effort has been attributed yet to risk assessment and moreover to risk management of the activity.The present effort aims at developing a working framework for the shellfish aquaculture of Greece to be used as a tool by the sector’s decision makers to advance strategies for risk elimination or avoidance.The work was based on a generic risk management standard tool,the Joint Australian and New Zealand Risk Management Standard AS/NZS ISO 31000:2009 that has been adapted to the specific national characteristics of all levels of the mussel farming business-activities and the industry function.The framework supported by data sets regarding development,production,profits and losses,retrieved by surveys through distributed questionnaires or interviews during site-visits,as well as by collecting data from national and international authorities.Data input covered technology,farm size,farmer risk-attitude,risk-management strategies,risk-perceptions and socioeconomic profiles.Major risks and risk management options were identified providing aid for remediation risk policies to the stakeholders.展开更多
Global warming underscores the urgent need to enhance carbon sinks to mitigate climate change,yet the role of coastal shellfish aquaculture area as either carbon sinks or sources remains unclear.In this study,we condu...Global warming underscores the urgent need to enhance carbon sinks to mitigate climate change,yet the role of coastal shellfish aquaculture area as either carbon sinks or sources remains unclear.In this study,we conducted high-resolution profiling observations of CO_(2)dynamics and net community production(NCP)in a mussel farm located in the Changjiang(Yangtze)River estuary(CRE)during early autumn.Results indicate that the partial pressure of CO_(2)(pCO_(2))in the water column was consistently higher than the atmospheric level,averaging 74.75±2.44 Pa,signaling that the mussel farm acted as a CO_(2)source.The average air-water CO_(2)exchange flux(FCO_(2))averaged-1.91±1.16 mmol/(m^(2)·h),and NCP in the water column(NCPCOL)averaged-6.66±12.81 mmol/(m^(2)·h),revealing a heterotrophic condition.A significant inverse correlation was found between NCPCOLand sea surface pCO_(2)with a lag time of approximately 3.31 h,highlighting the influence of biological activity in modulating CO_(2)dynamics.Physical processes such as freshwater inputs,vertical mixing,and wind patterns,also played a crucial role in shaping pCO_(2)variations.The study emphasizes the complexity of CO_(2)dynamics in costal aquaculture areas and the need for long-term,high-resolution monitoring to better understand their contribution to climate change mitigation.The high-resolution profiling system provided novel insights into the dynamics of NCP and CO_(2)fluxes,showing its potential as an advanced tool for studying aquaculture systems.Future research should focus on expanding the geographic and temporal scope of studies,combining observational and modeling approaches to better predict the responses of aquaculture systems to environmental changes.展开更多
文摘Mediterranean mussel farming in Greece developed considerably during the last 40 years reaching a gross commodity product up to the limits of the country’s production capacity(35–40,000 tonnes/year).Despite the achievements in the sector’s growth,little or no effort has been attributed yet to risk assessment and moreover to risk management of the activity.The present effort aims at developing a working framework for the shellfish aquaculture of Greece to be used as a tool by the sector’s decision makers to advance strategies for risk elimination or avoidance.The work was based on a generic risk management standard tool,the Joint Australian and New Zealand Risk Management Standard AS/NZS ISO 31000:2009 that has been adapted to the specific national characteristics of all levels of the mussel farming business-activities and the industry function.The framework supported by data sets regarding development,production,profits and losses,retrieved by surveys through distributed questionnaires or interviews during site-visits,as well as by collecting data from national and international authorities.Data input covered technology,farm size,farmer risk-attitude,risk-management strategies,risk-perceptions and socioeconomic profiles.Major risks and risk management options were identified providing aid for remediation risk policies to the stakeholders.
基金Supported by the National Natural Science Foundation of China(Nos.U23A2033,41976154)the Key R&D Program of Zhejiang Province,China(No.2023C03011)+2 种基金the Key R&D Program of Guangxi,China(No.Guike AB22080099)the Science Foundation of Donghai Laboratory(No.DH-2022KF0205)the Bureau of Science and Technology of Zhoushan(No.2022C81006)。
文摘Global warming underscores the urgent need to enhance carbon sinks to mitigate climate change,yet the role of coastal shellfish aquaculture area as either carbon sinks or sources remains unclear.In this study,we conducted high-resolution profiling observations of CO_(2)dynamics and net community production(NCP)in a mussel farm located in the Changjiang(Yangtze)River estuary(CRE)during early autumn.Results indicate that the partial pressure of CO_(2)(pCO_(2))in the water column was consistently higher than the atmospheric level,averaging 74.75±2.44 Pa,signaling that the mussel farm acted as a CO_(2)source.The average air-water CO_(2)exchange flux(FCO_(2))averaged-1.91±1.16 mmol/(m^(2)·h),and NCP in the water column(NCPCOL)averaged-6.66±12.81 mmol/(m^(2)·h),revealing a heterotrophic condition.A significant inverse correlation was found between NCPCOLand sea surface pCO_(2)with a lag time of approximately 3.31 h,highlighting the influence of biological activity in modulating CO_(2)dynamics.Physical processes such as freshwater inputs,vertical mixing,and wind patterns,also played a crucial role in shaping pCO_(2)variations.The study emphasizes the complexity of CO_(2)dynamics in costal aquaculture areas and the need for long-term,high-resolution monitoring to better understand their contribution to climate change mitigation.The high-resolution profiling system provided novel insights into the dynamics of NCP and CO_(2)fluxes,showing its potential as an advanced tool for studying aquaculture systems.Future research should focus on expanding the geographic and temporal scope of studies,combining observational and modeling approaches to better predict the responses of aquaculture systems to environmental changes.
