This study analyzed the impact of land-based contaminants and tertiary industrial structure on economic development in the selected Bohai Bay area,China.Based on panel data spanning 2011-2020,a vector autoregressive(V...This study analyzed the impact of land-based contaminants and tertiary industrial structure on economic development in the selected Bohai Bay area,China.Based on panel data spanning 2011-2020,a vector autoregressive(VAR)model is used to analyze and forecast the short-run and long-run relationships between three industrial structures,pollutant discharge,and economic development.The results showed that the environmental index had a long-term cointegration relationship with the industrial structure economic index.Per capital chemical oxygen demand(PCOD)and per capita ammonia nitrogen(PNH_(3)N)had a positive impact on delta per capita GDP(dPGDP),while per capita solid waste(PSW),the secondary industry rate(SIR)and delta tertiary industry(dTIR)had a negative impact on dPGDP.The VAR model under this coupling system had stability and credibility.The impulse response results showed that the short-term effect of the coupling system on dPGDP was basically consistent with the Granger causality test results.In addition,variance decomposition was used in this study to predict the long-term impact of the coupling system in the next ten periods(i.e.,ten years).It was found that dTIR had a great impact on dPGDP,with a contribution rate as high as 74.35%in the tenth period,followed by the contribution rate of PCOD up to 3.94%,while the long-term contribution rates of PSW,SIR and PNH3N were all less than 1%.The results show that the government should support the development of the tertiary industry to maintain the vitality of economic development and prevent environmental deterioration.展开更多
旨在了解秀丽白虾线粒体16S rRNA基因序列及线粒体16S r RNA基因在虾类物种鉴定及系统分类中的作用,采用PCR特异扩增测序的方法,对秀丽白虾(Exopalaemon modestus)的16S rRNA基因片段进行了分析,并探讨了长臂虾亚科虾类的系统发育关系...旨在了解秀丽白虾线粒体16S rRNA基因序列及线粒体16S r RNA基因在虾类物种鉴定及系统分类中的作用,采用PCR特异扩增测序的方法,对秀丽白虾(Exopalaemon modestus)的16S rRNA基因片段进行了分析,并探讨了长臂虾亚科虾类的系统发育关系。结果表明:54尾秀丽白虾16S r RNA基因共发现5种单倍型和8个变异位点。13种长臂虾间的遗传距离在0~0.2614之间,7个属间的遗传距离为0.1344~0.2769。NJ法和ME法构建的系统进化树显示,除洁白长臂虾外,同属的不同种先聚成一支,其中东方白虾和脊尾白虾亲缘关系最近。长臂虾属和小长臂虾属亲缘关系很近,长臂虾属为多起源;推测洁白长臂虾与宽额拟瘦虾之间的分化时间距今约22.34百万年。本研究结果表明,线粒体16S rRNA基因序列不能单独对长臂虾亚科虾类进行物种鉴定,但进行系统分类和亲缘关系分析是可行的。展开更多
基金supported by the research funds for Coupling Research on Industrial Upgrade and Environmental Management in the Bohai Rim-Technique,methodology,and Environmental Economic Policies(No.42076221).
文摘This study analyzed the impact of land-based contaminants and tertiary industrial structure on economic development in the selected Bohai Bay area,China.Based on panel data spanning 2011-2020,a vector autoregressive(VAR)model is used to analyze and forecast the short-run and long-run relationships between three industrial structures,pollutant discharge,and economic development.The results showed that the environmental index had a long-term cointegration relationship with the industrial structure economic index.Per capital chemical oxygen demand(PCOD)and per capita ammonia nitrogen(PNH_(3)N)had a positive impact on delta per capita GDP(dPGDP),while per capita solid waste(PSW),the secondary industry rate(SIR)and delta tertiary industry(dTIR)had a negative impact on dPGDP.The VAR model under this coupling system had stability and credibility.The impulse response results showed that the short-term effect of the coupling system on dPGDP was basically consistent with the Granger causality test results.In addition,variance decomposition was used in this study to predict the long-term impact of the coupling system in the next ten periods(i.e.,ten years).It was found that dTIR had a great impact on dPGDP,with a contribution rate as high as 74.35%in the tenth period,followed by the contribution rate of PCOD up to 3.94%,while the long-term contribution rates of PSW,SIR and PNH3N were all less than 1%.The results show that the government should support the development of the tertiary industry to maintain the vitality of economic development and prevent environmental deterioration.
文摘旨在了解秀丽白虾线粒体16S rRNA基因序列及线粒体16S r RNA基因在虾类物种鉴定及系统分类中的作用,采用PCR特异扩增测序的方法,对秀丽白虾(Exopalaemon modestus)的16S rRNA基因片段进行了分析,并探讨了长臂虾亚科虾类的系统发育关系。结果表明:54尾秀丽白虾16S r RNA基因共发现5种单倍型和8个变异位点。13种长臂虾间的遗传距离在0~0.2614之间,7个属间的遗传距离为0.1344~0.2769。NJ法和ME法构建的系统进化树显示,除洁白长臂虾外,同属的不同种先聚成一支,其中东方白虾和脊尾白虾亲缘关系最近。长臂虾属和小长臂虾属亲缘关系很近,长臂虾属为多起源;推测洁白长臂虾与宽额拟瘦虾之间的分化时间距今约22.34百万年。本研究结果表明,线粒体16S rRNA基因序列不能单独对长臂虾亚科虾类进行物种鉴定,但进行系统分类和亲缘关系分析是可行的。
