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101.
本文通过在晋江市规划区开展抗震防灾基础调查工作中的地下水调查工作,总结在抗震防灾规划基础调查工作中对地下水专项调查的工作方法、重点及成果介绍。 相似文献
103.
本文研究了电热雾化器在ICP-AES应用中的分析性能。研究结果表明,这种新型雾化系统的信噪比、检出限及稳定性均好于V槽雾化器,基体效应较V槽雾化器严重。这种雾化进样系统将使ICP-AES与HPLC联用作为过程在线分析和形态分析成为可能。 相似文献
104.
The Caulerpa racemosa invasion: a critical review 总被引:1,自引:0,他引:1
Caulerpa racemosa var. cylindracea is a marine Chlorophyta introduced into the Mediterranean Sea from south-western Australia. Since 1990, it has been invading the Mediterranean Sea and the Canary Islands, raising ecological problems. Although this invasion event can be considered as one of the most serious in the history of species introduced into the Mediterranean Sea, C. racemosa has not triggered as much attention as the famous "killer alga"Caulerpa taxifolia. The aim of the present study was: (i) to summarize the current state of knowledge with regard to the distribution, the various biological and ecological characteristics of the introduced C. racemosa and its impact on the Mediterranean coastal environment; (ii) to discuss the various hypotheses regarding the explanation for its rapid and successful spread; (iii) to investigate the disparity in the treatment of C. racemosa and Caulerpa taxifolia invasions; and (iv) to outline future research needs. 相似文献
105.
珊夏适应性强,耐瘠薄,早花早果,座果率高,早期丰产,果大,品质优,是早熟苹果优良品种。本文对珊夏苹果的物侯期、生长结果习性、果实经济性状、适应性及其栽培要点作了简单介绍。 相似文献
106.
107.
Environment-ecosystem dynamic processes of Spartina alterniflora salt-marshes along the eastern China coastlines 总被引:2,自引:0,他引:2
Shu Gao YongFen Du WenJing Xie WenHua Gao DanDan Wang XiaoDong Wu 《中国科学:地球科学(英文版)》2014,57(11):2567-2586
Spartina alterniflora is ecologically important in its original habitat; however, it has caused controversy since it was introduction into China (now it has been spreading rapidly on the Jiangsu, Shanghai, Zhejiang and Fujian coasts). The purpose of the present contribution is, on the basis of an analysis and synthesis of existing data sets, to evaluate the environmental-ecological effects of S. alterniflora, and to identify the relevant scientific problems that require further research in the future. Investigations have shown that, by reducing the near-bed shear stress associated with tidal currents, S. alterniflora can enhance the settling flux of suspended sediment and deposition rate on the tidal flats over the region. Further, field survey and analysis indicate that the S. alterniflora salt-marsh has a high primary production and provides a new type of habitat for the native benthic fauna. Some macro-, meio- and micro-fauna that used to live in the native salt-marshes have adapted to the S. alterniflora salt-marsh, forming a new ecosystem. Under the influences of a number of background factors, such as latitude variations and the coastal type, the environmental-ecological changes induced by Spartine have regional differentiations. To the north of Hangzhou Bay, with a high position of the pre-Holocene stratum base, a large width of the tidal flats, and a gentle bed slope, only a small part of the intertidal zone is occupied by the S. alterniflora salt-marsh. Here, the S. alterniflora salt-marshes mainly play a positive role in coastal protection and ecosystem functioning. In contrary, to the South of Hangzhou Bay, The pre-Holocene deposits are situated in relatively deeo waters, and the width of the tidal flats formed within coastal embayments is relatively narrow. As such, the expansion of S. alterniflora has squeezed the living space of other intertidal organisms, thus has a negative ecological effect. Therefore, the regional differentiation of the Spartina effects should be sufficiently considered in coastal development and management. Furthermore, in order to predict the future evolution of the S. alterniflora wetlands over the region, in addition to in situ monitoring and measurements, an ecosystem dynamic model should be established, taking into account the coupling of the rerrestrial and marine environmental-ecological processes. 相似文献
108.
2005年10月在上海成功举办的“第七届国际地面沉降学术研讨会”,是首次在中国召开的该系列专业国际会议。现将该次会议的基本情况作一介绍。 相似文献
109.
气候变化对滦河流域水资源影响的水文模式模拟(Ⅰ)降水径流模式系统(PRMS)介绍及其在滦河流域的移植 总被引:1,自引:4,他引:1
简单介绍了引进美国地质勘查中心发展的降水径流模式系统(PRMS)。认为PRMS模式具有多种模拟功能,包含的物理过程也较全面,是当前世界上较好的水文学模式。将PRMS模式系统移植到滦河流域,并对其模拟能力进行了初步检验。结果表明,模式系统在我国滦河流域的移植比较成功,而且能够较真实地再现滦河流域河川径流量及水资源其它分量的年际及季节变化,也可以用于研究气候变化对滦河流域水资源的影响。 相似文献
110.