Paradoxes of conservation and development in postsocialist Bulgaria: Recent controversies

Based on extensive primary research in the 1990s a number of contemporary Bulgarian environmental controversies are examined, which highlight some of the paradoxes of sustainable development in a postsocialist context. Water sector controversies such as the Djerman-Skakavitsa diversion project forest and national park and other protected area management controversies in the Rila and Pirin National Parks and the Rhodope mountains are sketched. Extension and creation of new protected areas presents both challenges and opportunities to local residents and conservation agencies alike but creative solutions are at least being considered within a framework of sustainable regional development. It is found that dependence on natural resource hinterlands for commodity and non-commodity uses provides for new, complex and contested regulation between stakeholders and the postsocialist state at a variety of scales from the local to the global, with nested though mutable, scale-dependent relations. Copyright © 2002 John Wiley & Sons, Ltd and ERP Environment

Long-term change and geospatial patterns of river ice cover and navigability in Southcentral Alaska detected with remote sensing

ABSTRACTPeople who travel on ice-covered rivers to access traditional lands and resources can be profoundly impacted by effects of climate change on river ice seasonality. We used remote sensing, bolstered by citizen science, to assess trends and geospatial patterns of the ice cover in the Copper River Basin of Southcentral Alaska. Our analysis of Landsat imagery from water years (WYs) 1973 to 2021 suggests a severely diminishing season of river ice travel (delayed or incomplete freezeup, early breakup) due to increasing air temperatures. The weekly probability of an adequate ice cover for river crossings declined by an average of 53 percentage points. Ice extent was closely related to accumulated freezing degree days (AFDD). AFDDOct-Apr decreased by 15% since WY 1943, a significant warming trend. We mapped the spatiotemporal variation of ice and open water extent with multispectral and synthetic aperture radar (SAR) imagery (Sentinel-2, Sentinel-1). We identified reaches with more reliable opportunities for winter access and others susceptible to extensive open water, differences related to flow energy and channel form. The results of this study can support local decision making and adaptation in response to rapidly changing river ice conditions, and our approach can be applied elsewhere to document change and improve travel safety