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我只是论文的搬运工 2019.5.21 海藻养殖对渔场鱼类影响

已有 572 次阅读 2019-5-21 13:33 |个人分类:运粮工|系统分类:生活其它

我想在这里发海藻生态图   慢慢做科普用   不知大佬们有何见解  目前正处于思考和收集初期材料资料阶段

   望指教


In recent years, several indicators have been proposed to assess the effect of human activities on ecosystemsprovisioning capacity.  Some of these methods focus on the Net Primary Production (NPP) available for ecosystem functioning through the comparison between the Human Appropriated Net Primary Production (HANPP) and the ecosystem's initial NPP at a given reference year. While some approaches have been proposed for marine ecosystems, most of the HANPP studies focus on terrestrial systems. This study highlights the relation between the HANPP methods and the production of natural resources in marine ecosystems. The linkage between current overfishing and future fish provisioning (ecosystem service) is well known. However, less studied before, is the relation between seaweed aquaculture and fish provisioning through the marine food web. Seaweed growth requires nutrients and light that will consequently be no longer available for natural phytoplankton production. As seaweed is periodically harvested, a fraction of the ecosystem's NPP (HANPP) is no longer available for ecosystem production. The HANPP of aquaculture reduces the ecosystem carrying capacity and thus affects commercial fish stocks. Therefore, an integrative approach is proposed in this study to assess the potential effect of seaweed farming on fish landings in the Greater North Sea. Three indicators are proposed to assess the Lost Potential Yield (LPY) in fish landings: LPYB, LPYV and LPYE, accounting respectively for reduction in biomass, monetary value and eco-exergy. For these three aspects, the LPY results remains smaller than the seaweed production, meaning that the overall natural resources balance for seaweed farming is positive.


近年来,提出了若干指标,用以评估人类活动对生态系统供应能力的影响。这些方法中的一些侧重于可用于生态系统功能的净初级生产(NPP),通过对给定的参考年的人类净初级生产力(HANPP)和生态系统的初级生产力比较得出结果。虽然对海洋生态系统提出了一些方法,但大多数HANPP研究是侧重于陆地系统的。本研究着重阐述了HANPP方法与海洋生态系统自然资源生产的关系。众所周知,目前过度捕捞与未来鱼类供应(生态系统服务)之间的联系。然而,以往关于海藻养殖与通过海洋食物网提供鱼类的关系的研究较少。海藻的生长需要营养盐和光,因此这些物质将不再可用于自然浮游植物的生产。随着海藻的定期收获,生态系统NPP(HANPP)的一小部分不再用于生态系统的(再)生产。水产养殖的HANPP降低了生态系统的承载能力,从而影响到商业鱼类种群。因此,本研究提出了一种综合方法,以评估海藻养殖对大北海鱼类栖息地的潜在影响。本文提出了三个评估鱼类落地损失潜在产量(LPY)的指标:LPYBLPYVLPYE,分别反映了生物量、货币价值和生态热能的减少。就这三个方面而言,LPY的结果仍然小于海藻生产,这意味着海藻种植的自然资源总体平衡是积极的。


参考文献:Development of potential yield loss indicators to assess the eect of seaweed farming on fish landings




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