摄食紫菜粉等4种单一饵料的蚤状潘脂肪酸组成的比较

用GC／MS法分析比较了紫菜粉、小球藻、酵母、Banta液（牛粪1．5g＋干稻草2g＋沃土20g＋水1000cm3）4种食物条件下蚤状潘的脂肪酸组成．结果表明：4种食物培养下,蚤状潘的总脂含量依次为39．80、60．10、44．60、52．30mg／g．一共检测出脂肪酸14种,其中8种饱和脂肪酸（SFA）,2种单不饱和脂肪酸（MUFA）,4种多不饱和脂肪酸（PUFA）．紫菜粉培养组与小球藻组PUFA含量显著高于酵母组和Banta液组（P〈0．05）,占总脂肪酸的1／3以上,酵母组MUFA质量分数最高（P〈0．05）,达55．73％,Banta液组以SFA质量分数最高（P〈0．05）,为52．45％．其中紫菜粉组的PUFA中缺乏C18：3,但C20：5（EPA）和C20：4（AA）质量分数高达22．67％和9．02％是小球藻组的1．6倍和4．5倍（P〈0．05）,而且EPA和AA的实际含量也显著高于小球藻组（P〈0．05）,达到9．02mg／g和3．59mg／g;比较得出,紫菜粉培养组的20碳以上必需不饱和脂肪酸含量丰富,明显高于其他3组．本实验证实蚤状潘的脂肪酸组成与食物脂肪酸成正相关．分析认为,用紫菜粉培养枝角类用于海水育苗会取得更佳的营养效果．     

Biomass and carbon storage of Gracilariopsis lemaneiformis （Rhodophyta） in Zhanshan Bay,Qingdao, China

Marine macroalgae can absorb carbon and play an important role in carbon sequestration. As an important economic macroalga, Gracilariopsis lemaneiformis has the potential to significantly affect carbon absorption and storage in wave-sheltered intertidal reef systems. However, detailed knowledge on seasonal biomass changes and carbon storage of G. lemaneiformis is lacking, especially in many small and scattered ecosystems. Considering the influence of human activities on wild distribution of G. lemaneiformis, the understanding of seasonal dynamics of an economically important species in nature is necessary. In this study, we first investigated seasonal variations in biomass, coverage area, and carbon storage during low tide from August 2011 to July 2012 in Zhanshan Bay, Qingdao, China. Furthermore, we estimated the carbon storage potential of wild G. lemaneiformis using light use efficiency(LUE). The results show that the standing biomass and coverage area changed significantly with season. However, seasonal variations in carbon content and water content were not obvious, with an average content of 35.1% and 83.64%, respectively. Moreover, carbon storage in individual months varied between 0.67 and 47.03 g C/m 2, and the value of carbon storage was the highest in August and June and the lowest in February. In Zhanshan Bay, LUE of G. lemaneiformis was only 0.23%. If it is increased to the theoretical maximum(5%–6%), the carbon storage will have an increase of at least 21 times compared with the current, which suggested that carbon storage of wild G. lemaneiformis had a high enhancement potential. The study will help to assess a potential role of G. lemaneiformis in reducing atmospheric CO2.     

Development of a SCAR marker for male gametophyte of Gracilariopsis lemaneiformis based on AFLP technique

The red alga Gracilariopsis lemaneiformis （Bory） is an economically valuable macroalgae. As a means to identify the sex of immature Gracilariopsis lemaneiformis, the amplified fragment length polymorphism （AFLP） technique was used to search for possible sex- or phase-related markers in male gametophytes, female gametophytes, and tetrasporophytes, respectively. Seven AFLP selective amplification primers were used in this study. The primer combination E-TG/M-CCA detected a specific band linked to male gametophytes. The DNA fragment was recovered and a 402-bp fragment was sequenced. However, no DNA sequence match was found in public databases. Sequence characterized amplified region （SCAR） primers were designed from the sequence to test the repeatability of the relationship to the sex, using 69 male gametophytes, 139 female gametophytes, and 47 tetrasporophytes. The test results demonstrate a good linkage and repeatability of the SCAR marker to sex. The SCAR primers developed in this study could reduce the time required for sex identification of Gracilariopsis lemaneiformis by four to six months. This can reduce both the time investment and number of specimens required in breeding experiments.     

浅谈RTK技术在地籍图根控制测量中的应用

将RTK技术应用于地籍测量中,分析了RTK在图根导线控制测量的可行性,阐述了该技术应用于图根控制测量中遇到的问题并进行了深入研究,提出了相应对策。     

加权最小二乘相位解缠的一种改进

基于最小二乘相位解缠原理,针对现有的加权和不加权最小二乘在残差点过多时计算结果平滑问题,提出利用相位导数变化图对其进行加权改进。结合真实数据,通过现有的加权与不加权最小二乘算法的比较和分析,证明该改进算法能有效处理残差点过多的情况,解缠精度高,解缠结果更可靠。     

空间性规划“多规合一”中可利用土地资源评价——以永安市为例

国土空间开发适宜性评价是国土开发格局优化与区域协调发展的科学依据,是顺利完成空间规划"多规合一"试点任务的重要保障,而开发适宜性评价中的一个重要指标就是测算和评价可利用土地资源,其测算和评价的准确性是决定适宜性评价科学合理性重要因素之一,从而决定"多规合一"试点工作能否顺利进行。本文以永安市各乡镇为基本评价单元,利用国情普查成果数据,借助GIS空间分析技术,对永安市可利用土地资源进行了评价,为"多规合一"试点工作提供重要依据。     

稀散元素Sc的矿床类型及找矿前景

Sc是一种典型的稀散元素,常类质同象进入镁铁质矿物中。自然界中罕见钪的富集体。Sc主要是从铝土矿、钛铁矿、磷块岩、黑钨矿、锡石等矿石中作为伴生元素加以回收。近几年,随着对复杂硅酸盐矿物Sc浸出试验的研究,Sc元素也可从富Sc的基性-超基性岩体(Sc2O350×10-6)中提取。主要富Sc矿物有单斜辉石、角闪石。云南二台坡岩体源区可能具有富Sc的特性,在岩浆结晶早期大量进入镁铁质硅酸盐矿物,形成钪的独立矿床(Sc2O3=66.08×10-6)。这类矿床在国内外还属首例,其发现扩大了独立钪矿床类型,对寻找新型钪矿具有重要的指导意义。     

基于GIS的县级国土空间规划“三区三线”划定研究--以霞浦县为例

以主体功能区规划为基础,划定“三区三线”是编制县级国土空间规划的前提。本文以霞浦县为例,基于资源环境承载能力评价与国土空间开发适宜性评价(以下简称“双评价”),利用GIS技术手段,开展陆海全覆盖“三区三线”的划定。把陆海统筹作为重要原则,通过霞浦县空间规划“三区三线”划定的实践研究,总结问题与不足,为沿海地区开展县级国土空间规划“三区三线”划定工作提供参考与借鉴。     

面向可持续发展目标的西部水土资源评估北大核心CSCDCSSCI

新时代西部大开发要形成新格局,解决西部发展不平衡不充分的问题,就要提高西部水土资源的利用效率,走可持续发展的道路。计算水土资源承载能力和水土资源对可持续发展目标实现的贡献情况,对制定合理的资源开发策略支撑西部发展十分重要。本文从水土资源承载压力和水土资源对可持续发展目标实现的贡献两个方面构建西部水土资源评估体系,选取水土资源承载力评价、水土资源匹配度评价和水土资源可持续发展贡献评价方法,评估西部13个省份的水土资源承载压力、水土资源匹配度、水土资源可持续发展贡献状态和潜力。结果显示西部水土资源压力指数在0.44~0.98之间,低于全国平均水平。水土资源匹配度指数为1.66,高于全国平均水平。对比全国,西部水土资源可持续发展贡献指数为0.49,接近全国平均水平,可持续发展水平趋势向好,整体存在很大潜力,但不同省市内部差异较大,水土资源可持续发展需要提高水土资源的可持续利用管理水平。西部整体评估对西部大开发战略政策制定具有一定的借鉴意义,西部各省份水土资源状况评估结果可对西部水土资源利用政策制定提供一定参考。     

利用跨断层形变资料研究近期唐山断裂活动性

采用1999年1月～2012年9月唐山台跨断层基线和水准数据资料,计算出唐山断裂水平和垂直形变及断层活动速率.并求解了唐山台站的应变特征和主应变方向,研究了唐山断裂的活动特征,并探讨了唐山断裂活动与地震活动的关系.结果表明,较远区域的大震和本地区中强地震对唐山断裂的水平向张压运动和垂向运动都可能有一定的影响.2003年可能是唐山断裂周边应力场发生较大改变的一年.