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1.
Tree densities in the mid 1800s were calculated for 16 areas on the lowland Gippsland plain, Victoria, using data on historical maps. The plotless, closest individual method was used on map data, which listed the distance and compass bearings of trees from allotment corners. Densities ranged from 2 to 59 trees per hectare, with most estimates below 30 trees per hectare. Sparsest trees were in and near areas mapped as ‘open plains’ and the densest tree cover was on seasonally flooded river flats. Whilst it seems prudent to treat such figures as indicative rather than precise, this simple method holds considerable promise for obtaining quantitative estimates of tree densities before widespread clearing.  相似文献   

2.
本共分三个部分,第一部分论述隋末唐初东突厥分化操纵中原各派势力的史事;第二部分分析东突厥对付中原各派势力的策略,指出不同时期东突厥的策论有不同的特点和变化;第三部分讨论东突厥分化操纵中原势力的几种措施,措施的特点以及形成的原因:承袭突厥的传统、借鉴隋朝的经验、利用居住突厥的胡人和华人的作用等等。最后还讨论了东突厥这些措施与中原民族的差异。  相似文献   

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River basin management activities are often carried out in the context of real or perceived environmental change. Views of environmental change provided by the oral tradition are compared with histories of change reconstructed from the historical documentary record for the Nogoa River, Queensland, and the Avon River, Victoria. Quite different perspectives on the nature and causes of river channel change are provided by the two types of sources. River basin managers appear to have generally adopted the views provided by the more easily accessible oral tradition, leading to management strategies that are not necessarily justifiable in the light of the documentary history.  相似文献   

4.
刘兰青 《清史研究》2002,(1):114-115
2001年10月15日至18日,由中国第一历史档案馆与日本冲绳县教育委员会联合主办的“第六届中国·琉球历史关系研讨会”在北京召开。来自中国第一历史档案馆、中央档案馆、国家档案局、北京市档案馆、中国社会科学院、北京社会科学院、故宫博物院、中国人民大学、福建师范大学,以及日本冲绳县教育委员会、冲绳县公文书馆、琉球大学、大东文化大学等中日两国的专家学者总计49人参加了本届研讨会。中国第一历史档案馆馆长、研究馆员邢永福,日本冲绳县教育委员会委员长津嘉山朝祥分别代表中日双方致开幕词。中国第一历史档案馆副馆长刘余才主持…  相似文献   

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This article explores the role of historiography in the developing identity of congregationally autonomous churches by examining the process and meaning behind the historical myth‐making associated with pioneering church leadership. In the absence of a clerical hierarchy or recognised historical expertise, four competing claims for the title of “first evangelist” emerged in the Churches of Christ (Disciples of Christ) denomination in colonial Victoria. Each of these claims is critically analysed in the light of rapidly developing church identity, the work of the evangelists in the 1860s, the influence of Australian nationalism, and historiographical portrayals which sought to make these four men heroes even in their absence. Finally the article examines absence of another kind — historiographical omission — and the question of the heroic in denominational church history.  相似文献   

6.
半城芦苇半城庙——古甘州生态、历史、人文诠释   总被引:1,自引:0,他引:1  
位于河西走廊中部的历史文化名城张掖,各历史时期特殊的自然、地理赋予了其优美的生态环境,独特的地理位置赋予了其厚重而特殊的历史职能,不同的文化聚汇、交融成就了其独具特色的地域风尚,张掖也由此成为丝绸之路上一颗闪耀的明珠。  相似文献   

7.
工业革命以来西方主要国家环境污染与治理的历史考察   总被引:1,自引:1,他引:1  
环境污染由来已久。早在14世纪初,英国就注意到了煤烟污染;17世纪伦敦煤烟污染加重时,有人著文提出过改善大气品质的方案。不过直到这时,污染只在少数地方存在,污染物也较少,依靠大自然的自净能力,尚不至于造成重大危害。环境污染发生质的变化并演变成一种威胁人类生存与发展的全球性危机,则始于18世纪末叶兴起的工业革命。  相似文献   

8.
本文根据考古学14C年代数据和考古遗存情况,结合高分辨率的地层和古气候研究资料,分析了河北及京津地区早中全新世文化的时空分布格局以及影响遗址分布的地貌和气候因素。该地区早中全新世文化时间序列为:早期新石器时代文化(10,000~8,800 yr BP)、新石器早中期之间的文化缺环(约8,800~7,300 yr BP)、7,300~6,500yr BP的磁山.兴隆洼.北福地一期三大文化系统并立发展时期以及6,500~6,000 yr BP的前仰韶文化时期。文化序列与气候序列对比发现:文化发展很大程度上受到气候条件的制约。从文化分布空间来看,具有如下特征:首先,早中全新世时期的文化分布在与当时海岸线平行的弧形地带上,这种分布格局与气候和地貌条件有关。在排除了地势高亢和海侵影响地区后,太行山东麓到古海岸线之间的弧形地带成为最佳选择。其次,从遗址分布高度来看,当时人仍居住在较高地貌面上,海侵及众多湖沼阻止了人类向东部平原腹地迈进的步伐。  相似文献   

9.
In upland settings in humid and semihumid temperate and tropical environments, bioturbation is a major factor in the burial of modest architectural remains, which are abundant components of the settlement systems of complex societies. Surface survey, favored by archaeologists of complex societies as a settlement detection method, seldom is appropriate for discovering architectural remains buried through bioturbation. Where the focus of analysis includes settlement represented by architectural remains, surface survey is appropriate only where all or a representative sample of all types of architectural remains are protrusive. Protrusion describes a relationship (affected by climate, environment, topography, and cultural variables) between the height of a ruined building and the depth of the biomantle, which is the zone of bioturbation. To enable archaeologists to assess the appropriateness of settlement detection procedures, including surface survey, I propose a scheme that classifies architectural remains in terms of their protrusion, building height, and visibility characteristics. The scheme can be employed to determine if and why architectural remains are protrusive in particular study areas. To demonstrate its analytical utility, I apply the scheme and the model of building burial through bioturbation that underlies it to the problem of Maya invisible settlement. I conclude that in the Maya lowlands of Mesoamerica, building remains buried through bioturbation are a more abundant settlement category than many archaeologists have supposed.  相似文献   

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Abstract

An ecologist's point of view of the historical, scientific and social background to the Alaskan pipeline and offshore oil is presented ranging over many discipline and their close interplay. Starting with a deep concern about the protection of the Arctic's unique environment and the oil industry's impact upon it, the work of the Alaska Conservation Society is reviewed. The lack of biological information about Alaska's hinterland made environmental surveillance of the pipeline difficult. The political conflict between State and Federal authorities has hindered scientific effort and the author concludes that the outlook of this many-faceted interdisciplinary impact of technology on the Arctic and Alaska is at present uncertain.  相似文献   

12.
This article provides a broad overview and critical appraisal of the major changes to the role and rationale of government and public administration in Victoria brought about by the Kennett Liberal‐National Coalition government (1992–99). It does so in order to revisit and highlight the fading relevance and viability of the Westminster system of 'responsible government' in the constitutional systems of the States. We show how the Victorian Constitution provides very few restraints upon a government seeking to undermine civil and political rights, weaken the Opposition, marginalise contestatory institutions and restrict information. Against the Westminster system, we defend a republican constitutional arrangement that is able to maintain the contestability of public power. To this end, we suggest a range of workable reforms designed to strengthen democracy and to improve the accountability of public power, particularly that of the political executive.  相似文献   

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本文以河南淮阳古城城湖为例,探讨历史时期华北平原城市湖塘湿地的自然生态与人文景观。适应于华北平原水资源时空分布不均、旱涝灾害易发的水环境,传统城市中以雨洪为主要水源的湖塘水体,是具有较大幅度水位变化、旱涝交替的湿地景观。不仅为多种动植物提供了栖息地,也与城市居民的生产生活建立了广泛而紧密的联系,从文化休闲、日常用水,到适应湿地水域内不同水土条件及其旱涝变化的农业生产和土地利用,塑造了独特的文化景观,对当代华北平原城市的水景观建设具有参照意义。拍摄于1960-1972年间的科罗纳卫星影像,以高分辨率、多时相等特点,能够展示湿地景观的旱涝变化和土地利用的适应性变化,为研究历史时期的湿地景观提供了重要的图像资料。  相似文献   

16.
This article focuses on one of the most disturbing features of life on the Tibetan grasslands today: intractable, violent conflicts over pasture. The author argues that understanding spatial and historical dimensions of the process through which Amdo was incorporated into the People's Republic of China (PRC) helps us make sense of these conflicts. State territoriality attempts to replace older socio–territorial identities with new administrative units. However, histories remain inscribed in the landscape and lead to unintended consequences in the implementation of new grassland policies. The author draws on Raymond Williams’ insight into residual formations to theorize the relationship between range conflicts and secular state officials’ lack of authority. At the same time, dispute resolution by religious figures challenges both triumphalist readings of state domination and romantic notions of Tibetan resistance.  相似文献   

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Channel changes on the lower Latrobe River since the late 1800s include a 25 per cent reduction in channel length due to artificial meander cutoffs, increases in mean channel width, increased channel instability and incision of up to 1.05 m. Hydraulic changes at the Rosedale gauge include increases in bankfull flow velocity and a 67 per cent increase in channel capacity, resulting in a threefold reduction of over-bank flow duration. The extensive channelisation works have reduced the frequency of minor flooding and the period offloodplain inundation, but these and other human impacts have severely degraded the stream environment.  相似文献   

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Abstract

Two great movie directors were both born in 1930. One of them, Jean-Luc Godard, revolutionized filmmaking during his 30s and declined in creativity thereafter. In contrast, Clint Eastwood did not direct his first movie until he had passed the age of 40 and did not emerge as an important director until after he was 60. This dramatic difference in life cycles was not accidental, but was a characteristic example of a pattern that has been identified across the arts: Godard was a conceptual innovator who peaked early, whereas Eastwood was an experimental innovator who improved with experience. This article examines the goals, methods, and creative life cycles of Godard, Eastwood, and eight other directors who were the most important filmmakers of the second half of the twentieth century. Francis Ford Coppola, Stanley Kubrick, Stephen Spielberg, and François Truffaut join Godard in the category of conceptual young geniuses, while Woody Allen, Robert Altman, John Cassavetes, and Martin Scorsese are classed with Eastwood as experimental old masters. In an era in which conceptual innovators have dominated a number of artistic activities, the strong representation of experimental innovators among the greatest film directors is an interesting phenomenon.  相似文献   

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