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151.
152.
153.
Mapping hotspots of multiple landscape functions: a case study on farmland afforestation in Scotland 总被引:4,自引:1,他引:4
Many conservation and restoration efforts in developed countries are increasingly based on the premise of recognising and
stimulating more ‘multi-functionality’ in agricultural landscapes. Public policy making is often a pragmatic process that
involves efforts to negotiate trade-offs between the potentially conflicting demands of various stakeholders. Conservationists’
efforts to influence policy making, can therefore benefit from any tool that will help them to identify other socio-economic
functions or values that coincide with good ecological conservation options. Various types of socio-economic objectives have
in recent years been mapped across landscapes and so there are now important opportunities to explore the spatial heterogeneity
of these diverse functions across the wider landscape in search of potential spatial synergies, i.e. ‘multiple win locations’
or multifunctional ‘hotspots’.
This paper explores the potential occurrence of such synergies within the agricultural landscape of northeast Scotland and
evaluates an existing woodland planting policy using and combining three different policy objectives. Our results show that
there are indeed broad areas of the studied landscape where multiple objectives (biodiversity, visual amenity and on-site
recreation potential) could be achieved simultaneously (hotspots), and that the case study which we evaluate (the Farm Woodland
Premium Scheme) could be much better spatially targeted with regards to each individual objective as well as with regards
to these hotspots of multifunctionality.
相似文献
Dan van der HorstEmail: |
154.
WANG Da-an GONG Xiao-wei LIU Ai-hua MEI Zhu-zhong WANG Dan MING Xiao-yan WANG Xu WEI Jie DENG Peng JIANG Yong 《园艺学报》2010,26(9):1813-1817
AIM: To construct pNTAP-PRAK eukaryotic expression plasmid and to establish a stable HEK293 cell line expressing tandam affinity purification (TAP)-tagged PRAK. METHODS: Human PRAK coding region was subcloned into pNTAP vector to construct a recombinant plasmid called pNTAP-PRAK, then DH5α E.coli was transformed with the recombinant plasmid. After identified by PCR, digestion with restriction endonuclease and sequencing, the correct recombinant expression plasmid was transfected with PolyFect liposome transfection reagent to HEK293 cells. The cell line with stable expression of exogenous TAP tagged-PRAK gene was established by screening of antibiotic G418. The expression and localization of the fusion protein TAP tagged-PRAK were detected by Western blotting and immunofluorescence assay. RESULTS: All the results of identification by PCR, digestion with restriction endonuclease and sequencing indicated that the recombinant eukaryotic expression plasmid pNTAP-PRAK was constructed correctly. The result of Western blotting showed that the recombinant plasmid was expressed stably in HEK293 cells after transfection followed by G418 screening. The result of immunofluorescence assay showed that the expression product TAP tagged-PRAK distributed mainly in the nucleus. CONCLUSION: The eukaryotic expression vector pNTAP-PRAK was successfully constructed and the cell line stably expressing TAP tagged-PRAK was established. TAP tag didnt influence the localization of exogenous PRAK. 相似文献
155.
拟南芥花期基因FT 转化切花菊‘神马’ 总被引:3,自引:0,他引:3
采用RT-PCR 方法从拟南芥叶片中克隆FT 基因,经过测序分析、酶切之后,连接到植物表达载体Super1300+,构建植物重组载体FT- Super1300+,运用农杆菌介导法将FT 基因导入切花菊‘神马’中,鉴定其在转化植株体内的整合和表达。扩增得到的基因片段经测序分析与GenBbank 上的FT 基因同源性为100%;构建的植物表达载体经过酶切分析证实外源基因已经正确插入;转化后得到了29 株抗性植株,PCR 和PCR-Southern 杂交结果显示,8 株抗性植株为阳性,说明外源基因整合到转化植株的基因组中。RT-PCR 鉴定结果表明外源基因在转化植株叶片中表达。其中转FT 基因的一个株系在组培条件下分化出花芽,表明转基因植株花芽分化不受光周期影响,可以提前花期。 相似文献
156.
157.
MicroRNAs (miRNAs)are a class of non-coding, endogenous, single-stranded small RNA molecules composed of 19~25 nucleotides. miRNAs are widely involved in the process of human life activities. Recent studies have shown that part of miRNAs regulate the vascular endothelial function and angiogenesis. High expression of miRNA-21 is found to play important roles in the cell proliferation, cell apoptosis, cell growth and death of vascular endothelial cells. This review will focus on the recent progress related to miRNAs in vascular endothelial function and angiogenesis, providing a new insight in cardiovascular disease prevention, clinical diagnosis, prognosis and target therapeutics. 相似文献
158.
159.
Hu Lide Yang Dan Wang Shilong 《保鲜与加工》1993,(6):58-64
After researching the function requirements of the planning and scheduling in manufacturing cells, the paper advanced a control structure with three phases, i. e. planning , scheduling and dispatching. The paper represented in detail the main purposes, requirements and scheduling actions in each phase. It suits to general machining FMSs. 相似文献
160.
有机肥等氮替代化肥对红壤团聚体及玉米产量和品质的影响 总被引:2,自引:1,他引:2
为研究有机肥等氮替代化肥对土壤结构、玉米产量和品质的影响,设置有机肥等氮替代化肥的10%(M10)、20%(M20)、30%(M30)、40%(M40),以单施化肥(M0)和不施肥(CK)为对照6个施肥处理,测定玉米不同生育期的土壤团聚体变化状况。结果表明:随有机肥等氮部分替代化肥比例的增加,玉米各生育期土壤>0.25mm水稳性团聚体(R0.25)、平均质量直径(MWD)、几何平均直径(GWD)不断增加,团聚体破坏率(PAD)、分形维数(D)不断降低。与M0处理相比,M30和M40处理显著提高了玉米子粒产量,表现为M30>M40;M20、M30、M40处理较M0处理玉米子粒蛋白质含量显著增加了13.29%~25.03%,淀粉含量显著增加了39.84%~114.06%,可溶性糖含量显著增加了36.49%~54.05%;蛋白质含量表现为M30和M20处理显著大于M40处理,M30与M20处理间差异不显著;淀粉含量表现为M40>M30>M20,差异显著;可溶性糖含量表现为M40和M30处理显著大于M20处理,M30与M40处理间差异不显著。玉米子粒产量和品质与抽雄期、成熟期土壤团聚体R0.25呈极显著正相关(P<0.01),与PAD、D值呈极显著负相关(P<0.01)。因此,玉米生产中,利用有机肥等氮替代化肥培肥土壤,需兼顾玉米产量和品质,30%为适宜的有机肥等氮替代化肥比例。 相似文献