منابع مشابه
Analysis of Microcystins in Cyanobacterial Blooms from Freshwater Bodies in England
Cyanobacterial blooms in freshwater bodies in England are currently monitored reactively, with samples containing more than 20,000 cells/mL of potentially toxin-producing species by light microscopy resulting in action by the water body owner. Whilst significantly reducing the risk of microcystin exposure, there is little data describing the levels of these toxins present in cyanobacterial bloo...
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This article engages with debates about the conceptualisation and practical challenges of patient and public involvement (PPI) in health and social care services. Policy in this area in England has shifted numerous times but increasingly a consumerist discourse seems to override more democratic ideas concerning the relationship between citizens and public services. Recent policy change in Engla...
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A fundamental consideration for the conservation of a species is the extent of its native range, that is, regions naturally colonized. However, both natural processes and human-mediated introductions can drive species distribution shifts. Ruling out the human-mediated introduction of a species into a given region is vital for its conservation, but remains a significant challenge in most cases. ...
متن کاملDistribution of Freshwater Turtles in Punjab, Pakistan
A total of 3528 specimens of freshwater turtles belonging to two families viz., Geoemydidae (Brown River Turtle, Kachuga smithi; Indian Saw-backed turtle, K. tecta; Brahminy Rrive Turtle, Hardella thurgi; Spotted Pond Turtle, Geoclemys hamiltonii) and Trionychidae (Indian Soft-shell Turtle, Aspederates gangeticus; Peacock Soft-shell Turtle, A.hurum; Narrow-headed Soft-shell Turtle, Chitra indic...
متن کاملPotential Effects of Climate Change on Freshwater Ecosystems of the New England/mid-atlantic Region
Numerous freshwater ecosystems, dense concentrations of humans along the eastern seaboard, extensive forests and a history of intensive land use distinguish the New England/Mid-Atlantic Region. Human population densities are forecast to increase in portions of the region at the same time that climate is expected to be changing. Consequently, the effects of humans and climatic change are likely ...
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ژورنال
عنوان ژورنال: Nature
سال: 1929
ISSN: 0028-0836,1476-4687
DOI: 10.1038/123912a0