河北沿海焦氏舌鳎资源现状分析

焦氏舌鳎过去利用价值较低,但随着渔业捕捞能力的增强,渔业资源衰退的问题日益突出,焦氏舌鳎的生态优势逐步显现。通过对河北省沿岸焦氏舌鳎近年资源状况进行研究,发现近两年其生态优势度有所提升,群体组成存在小型化、低龄化的特点,就此提出了渔业资源养护相关建议。     

厦门同安造水村乡村旅游开发研究

结合生态农村园发展的要求及对同安造水村的综合考察，从多角度来分析市场形势和造水村的人文、地理等各条件的综合状况，为造水村观光农业旅游资源的合理开发提供较为科学的理论依据，同时，为同安区汀溪镇发展成为厦门市的后花园提供借鉴。     

山西特色资源植物数据库的建立

本文通过搜集山西省资源植物的基本资料和查阅相关文献,结合植物的经济用途和传统植物分类方法,将山西省资源植物分为十五类。利用现代信息技术,创建了山西资源植物数据库,实现了山西资源植物的信息共享,为今后更合理地开发利用资源植物提供科学依据。     

荞麦轮纹病抗性鉴定方法的建立及荞麦抗病种质资源的筛选

为建立荞麦轮纹病的抗性鉴定方法和筛选可利用的抗轮纹病的荞麦种质资源,本研究以TP2和KP14为供试材料,在健康荞麦叶片正面针刺处理,然后用荞麦轮纹病的病原菌菌饼进行接种;利用建立的抗性鉴定方法,对50份荞麦种质资源进行抗病性评价。结果显示:针刺5针接种叶片病斑出现较快,且比针刺1针、针刺3针的叶片病斑大,针刺5针的病情指数最高。50份荞麦种质资源的病情指数有差异,其中YZ-18的病情指数为29.63,为高抗种质资源,YZ-2、YZ-5、YZ-13和YZ-9的病情指数均低于40,为中抗种质资源,其余为感病种质资源。因此,接种前叶片正面针刺5针的方法为最佳的抗性鉴定方法。50份抗性评价的荞麦种质资源中,筛选出5份抗病种质资源。     

CITES公约中云南濒危管制木材树种资源概述

根据CITES公约附录保护与管制木材种类名录，对云南处于濒危管制的木材树种资源现状进行研究。结果表明，全省被列入CITES公约的木材共有8种（类），其中附录Ⅱ有5种（类），附录Ⅲ有3种（类）。     

新能源公交车的推广应用

近年来，随着石油燃料的消耗增加，能源消耗以及环境问题逐渐得到了广泛的关注，新能源汽车（文章是指新能源公交车）的技术研发和产业化发展受到的重视程度越来越高。中国的经济发展越来越快，近几年汽车销售量增长迅速，石油消耗量大幅增加，导致二氧化碳等温室气体排放量大幅增加。文章主要从国家政策、车辆使用情况、配套充电设施建设等几个方面浅议新能源公交车在推广应用中面临的机遇和挑战。     

秦代“户赋”新证

本文通过对岳麓秦简中一条金布律文的解读，证明秦代不仅确有“户赋”，而且还有很明确的有关征收“户赋”的时间和数量的具体规定，尤其是其中有关“刍”、“钱”的换算关系，给我们解读秦和汉初时期“户赋”的数量差异提供了新的材料。     

Performance of Bangladesh indigenous rice in a weed infested field and separation of allelopathy from resource competition

This study aimed to identify the potential allelopathic indigenous rice (Oryza sativa L. ssp. indica) varieties from Bangladesh using a performance study in a weed‐infested field and to assess the extent of allelopathic interference relative to resource competition in a glasshouse experiment. Six varieties – namely, “Boterswar,” “Goria,” “Biron” and “Kartiksail” as the most allelopathic, “Hashikolmi” as weakly allelopathic and “Holoi” as nonallelopathic – were raised following a nonweed control method. The infestation levels of weed species were calculated using Simpson's Diversity Index (SDI), which ranged from 0.2 to 0.56. However, a significant correlation coefficient (0.87, P < 0.001) was obtained from these field data compared with the root inhibition percentage from the laboratory bioassay, and the “Boterswar” variety was the most allelopathic. The interactions between the allelopathic variety “Boterswar,” weakly allelopathic variety “Hashikolmi” and Echinochloa oryzicola via a target (rice)‐adjacent (E. oryzicola) cogrowth culture were determined in a hydroponic arrangement. The relative competitive intensity (RCI) and the relative neighbor effect (RNE) values showed that the crop–weed interaction was facilitation for “Boterswar” and competition for “Hashikolmi” and E. oryzicola in rice/E. oryzicola cogrowth cultures. The allelopathic effects of “Boterswar” were much higher than the resource competition in rice/E. oryzicola cogrowth cultures. The converse was observed for “Hashikolmi.” Moreover, the mineral content of E. oryzicola was severely affected by “Boterswar”/E. oryzicola cogrowth cultures’ exudate solution. Therefore, the allelopathic potential of “Boterswar” variety might be useful for developing the weed‐suppressing capacity of rice, which will likely have a significant influence on paddy weed control.     

新媒体时代公共图书馆创新服务研究——以重庆图书馆为例

随着新媒体时代的到来,人们接受信息的途径也有了全新的变化。新媒体给公共图书馆带来了机遇和挑战,公共图书馆面对种种挑战,积极创新服务,增强服务能力,提高服务水平和质量。     

Polymorphic mountain whitefish (Prosopium williamsoni) in a coastal riverscape: size class assemblages,distribution, and habitat associations

We compared the assemblage structure, spatial distributions, and habitat associations of mountain whitefish (Prosopium williamsoni) morphotypes and size classes. We hypothesised that morphotypes would have different spatial distributions and would be associated with different habitat features based on feeding behaviour and diet. Spatially continuous sampling was conducted over a broad extent (29 km) in the Calawah River, WA (USA). Whitefish were enumerated via snorkelling in three size classes: small (10–29 cm), medium (30–49 cm), and large (≥50 cm). We identified morphotypes based on head and snout morphology: a pinocchio form that had an elongated snout and a normal form with a blunted snout. Large size classes of both morphotypes were distributed downstream of small and medium size classes, and normal whitefish were distributed downstream of pinocchio whitefish. Ordination of whitefish assemblages with nonmetric multidimensional scaling revealed that normal whitefish size classes were associated with higher gradient and depth, whereas pinocchio whitefish size classes were positively associated with pool area, distance upstream, and depth. Reach‐scale generalised additive models indicated that normal whitefish relative density was associated with larger substrate size in downstream reaches (R² = 0.64), and pinocchio whitefish were associated with greater stream depth in the reaches farther upstream (R² = 0.87). These results suggest broad‐scale spatial segregation (1–10 km), particularly between larger and more phenotypically extreme individuals. These results provide the first perspective on spatial distributions and habitat relationships of polymorphic mountain whitefish.