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1.
Jamie B Kirkpatrick 《Geographical Research》2023,61(1):127-137
Isolation effects on the distributions of plant species in fragmented forests appear to be weak over tens to hundreds of years and strong over geological eras. The 250 km wide, 6.5 millennia old Bass Strait, and other millennium-scale disjunctions in the range of Eucalyptus regnans forests, were used to determine the effects of intermediate periods of isolation on plant species occurrence and composition. Three of six floristic communities were found on both sides of Bass Strait. The residuals from multiple regression models using climatic variables on the latitude vector were not explained by latitude, indicating negligible isolation effects from Bass Strait. However, there was a lesser compositional effect of disjunctions within land masses than between land masses, suggesting some effect of the larger barrier. No species that commonly occurred with E. regnans and were largely confined to wet forest exhibited absences from any region where the climate and soils were within their range. If areas isolated from each other for millennia can maintain their vascular plant biota, the expenditure of conservation funds on creating corridors to connect large areas separated by anthropogenic landscape modification might require more justification than it is currently afforded. 相似文献
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Hudson Mark J. Bausch Ilona R. Robbeets Martine Li Tao White J. Alyssa Gilaizeau Linda 《Journal of World Prehistory》2021,34(2):121-158
Journal of World Prehistory - From northern China, millet agriculture spread to Korea and the Maritime Russian Far East by 3500–2700 BC. While the expansion of agricultural societies across... 相似文献
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The “localities debate,” stimulated by the Economic and Social Research Council's “Changing Urban and Regional Systems” initiative, was conducted in the pages of Antipode and Society and Space at a length that showed scant regard for emerging environmental sensitivities. Much of it involved politically contentious claims and increasingly exhausted theory; it resolved very little and in that sense was little more than a storm in a pretty familiar pudding basin. A later flirtation with postmodernism simply pushed aside questions of explanation while raising the political stakes as celebration of the differences between places became the order of the day. Nonetheless, important issues emerge from or relate to that debate, and we draw on our experiences to comment on three of them: (i) agents, structures, the production of space and the material bases of place: some issues of theory; (ii) the production of places, people's attachment to place, and place-based political strategies: some issues of practice; (iii) localities, postmodernism and the difference that place makes: is the regressive turn to postmodernism as approach avoidable? 相似文献
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Archaeological evidence of ceramic production most commonly consists of locally procured raw materials. Excavations at Tell el-Timai in Lower Egypt recovered raw fine marl clay from two transport jars in the vicinity of pottery kilns dating to the 4th century b.c. Production wasters of small perfume bottles produced in the same fine marl clay were found inside the kilns. The marl clay inside the jars pointed to an origin outside of Lower Egypt. Samples of the clay and wasters, along with a confirmed locally sourced sample, were subjected to X-Ray Fluourescence (XRF) analysis, revealing significant differences in their chemical compositions. The results of the analysis are compared to published Egyptian data and an Upper Egyptian provenience is suggested because the raw clay is consistent with available comparative XRF data. 相似文献
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