岭南自然保护区药用蕨类植物资源及其开发利用

岭南自然保护区药用蕨类植物资源十分丰富,共有32科48属79种,论述了药用蕨类植物的生境、药用部位、采收状况,并结合当地的实际情况,提出了保护和开发利用建议.     

昌黎黄金海岸自然保护区现状

昌黎黄金海岸自然保护区的建立给当地及相邻地区带来多种效益，其中有保护生物多样性、维护海岸稳定、完善防护林等作用的生态效益；促进当地经济发展的社会效益及以生态旅游和水产养殖为主的经济效益。与此同时，也带来一些问题，如海洋执法问题。对此，保护区要建立海监机构,并与科学管理处合作，加强执法以保护生态环境。     

Use of Central Stonerollers (Cyprinidae: Campostoma anomalum) from Tennessee as a Bioindicator of Metal Contamination

We compared the levels of arsenic, cadmium, chromium, lead, manganese, mercury and selenium in a small species of fish (Central stonerollers, Campostoma anomalum) collected from East Fork Poplar Creek (EFPC) and a reference site in eastern Tennessee. Stonerollers are minnows in the Cyprinidae family that serve as prey for many carnivores in aquatic systems. Fish were collected from East Fork Poplar Creek within the U.S. Department of Energy's Y-12 National Security Complex, part of the Oak Ridge Reservation, and from a reference stretch of the Little River in East Tennessee. Whole fish were homogenized for analysis. Concentrations of all metals (except arsenic) were significantly higher in stonerollers from EFPC compared to the reference site. Mercury levels in minnows from EFPC averaged 0.4 ppm (μg/g), four times higher than the average for fish in the U.S. in general. This was higher than levels in fish from the nearby Clinch River and higher than fillets of white bass (Morone chrysops) from the same creek. Most metal levels were inversely related to size and weight of the stonerollers, perhaps due to growth dilution.