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81.
The Geography of the Anthropocene in New Zealand: Differential River Catchment Response to Human Impact
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New Zealand provides a useful environment to test the notion that the Anthropocene is a new geological epoch. There are two well‐dated anthropogenic impact ‘events’: Polynesian settlement c. AD 1280, and European colonisation c. AD 1800. Little attention, however, has been given to regional catchment response to these, although it has been assumed that both Polynesian and European farming and land use management practices significantly increased erosion rates across most of New Zealand. This paper addresses the nature and timing of human impacts on river systems using meta‐analysis of a recently compiled nationwide database of radiocarbon‐dated fluvial deposits. This shows highly variable human impacts on erosion and sedimentation in river systems, which are often difficult to separate from naturally driven river activity. Catchment‐scale data with high resolution dating control record clearer evidence of human disturbance. In Northland, anthropogenic alluviation is recorded from c. AD 1300 linked to early Polynesian settlement, enhanced further in the late 19th and 20th centuries by European land clearance, when sedimentation rates exceeded 25 mm year?1. This study demonstrates significant geographical variability in the timing of human impact on river dynamics in New Zealand, despite two synchronous phases of human settlement, and highlights the difficulty of formally designating a simple and single ‘Anthropocene Epoch/Age’. 相似文献
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IAN E.A. YEBOAH 《Geographical Research》2008,46(4):435-445
Several Sub‐Saharan African countries have experienced an upsurge of land claims by various ethnic groups whose lands were acquired by both the colonial and the post‐colonial State through compulsory acquisition. Ethnicity has been used as the basis of emancipating some ethnic groups from perceived disenfranchisement and impoverishment caused by the State acquiring their land. In some cases such land claims result in violence that threatens the social fabric of these countries. An urban example of such a land claim has been made by the GaDangme Council (GDC) in Ghana. This paper assesses the land claim by GDC and argues that its claim of disenfranchisement is more a perception than reality. The paper also investigates why GDC perceives the Ga ethnic group as impoverished and disenfranchised. It concludes by providing structural and pragmatic ways for solving problems centred on Ga land acquisition by the State. Resolving the Ga case may provide lessons for other countries experiencing similar problems. 相似文献
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IAN HARRIS 《Parliamentary History》2012,31(3):488-489
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Summary. This paper reviews some recent developments in the study of non-utilitarian monuments in relation to a new analysis of a group of earthworks at Dorchester on Thames, Oxfordshire, excavated between 1946 and 1981. It traces the changing character of these different sites in the light of a series of radiocarbon dates, and argues that analysis at this broad chronological and geographical scale is likely to be more informative than piecemeal investigation of individual 'types'of monument. 相似文献
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