A lesson from Bass Strait on connectivity conservation

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.     

世界纪录世界有多大？数字告诉你……

以色列12 以色列航空工业公司微型机器人实验室研制出一款新型机器人——“机械蝴蝶”。它属于接近纳米技术的微电子科技产品。“机械蝴蝶”长20厘米,仅重12克,内含发动机、传感器、通讯及转向系统,模拟蝴蝶煽动四片翅膀推动其前进。     

Editorial

Abstract

A recent online article in The Daily Beast listed archaeology as one of the thirteen most useless undergraduate degrees. The article failed to identify transferable job skills gained while engaged in archaeological work. Further, archaeological field programmes and labs offer an alternative learning environment that benefits some students. This article reviews two archaeological projects that used archaeology as a form of social activism to provide employment and education to an under-served community as a fundamental aspect of its goals. The Hopedale Archaeology Project is an archaeology field project based in a north-east Canadian community that provides education and work opportunities for Inuit students. The Veterans Curation Program based in the United States provides temporary employment to recently discharged military veterans in an archaeological and archival curation lab. These programmes assist individuals to re-establish themselves within the workforce and add to their academic and professional growth, as well as incorporate a public outreach component that makes archaeology and history more accessible to the public.