Cyanobacteria in High Latitude Lakes, Rivers and Seas
نویسندگان
چکیده
13.4 Mat-Forming Species .................................................... 375 13.4.1 Community Structure ...................................................... 375 13.4.2 Mat Structure and Pigments ............................................ 377 13.4.3 PAR and UVR Responses ............................................... 379 13.4.4 Nutrient Supply ............................................................... 380 13.4.5 Salinity ............................................................................ 380 13.4.6 Freeze-Up and Desiccation Tolerance ............................ 381 13.4.7 Controlling Factors.......................................................... 381
منابع مشابه
Allochthonous inputs of riverine picocyanobacteria to coastal waters in the Arctic Ocean.
The observed onset of climate change at high northern latitudes has highlighted the need to establish current baseline conditions in the Arctic Ocean, and has raised concern about the potential for the invasion and growth of biota that have warm temperature optima, such as cyanobacteria. In this study, we used 16S rRNA gene sequences as a molecular marker to evaluate the hypothesis that Arctic ...
متن کاملPresence of the Cyanotoxin Microcystin in Arctic Lakes of Southwestern Greenland
Cyanobacteria and their toxins have received significant attention in eutrophic temperate and tropical systems where conspicuous blooms of certain planktonic taxa release toxins into fresh water, threatening its potability and safe use for recreation. Although toxigenic cyanobacteria are not confined to high nutrient environments, bloom-forming species, or planktonic taxa, these other situation...
متن کاملDoes the Johnson Act Inhibit Riverboat Gaming on the Great Lakes?
In the annals of federal-state relations, the Great Lakes are unique. Their waters variously constitute navigable waterways, state boundaries, an international boundary, and most important for our purposes, "the high seas." 1 The federal government and adjoining states assert concurrent criminal jurisdiction over offenses committed on Great Lakes waters• As one might expect, the legal fiction o...
متن کاملTaxonomic survey of cyanobacteria of Urmia Lake (NW Iran) and their adjacent ecosystems based on morphological and molecular methods
In the present study, the cyanobacterial flora of Urmia Lake (NW Iran), one of the largest salt lakes in the world and adjacent rivers is investigated. Urmia Lake comprises different micro-organisms including cyanobacteria which have a major role in aquatic ecosystems. Cyanobacterial samples were collected in 2008–09 from Urmia Lake and its surrounding ecosystems. All samples were cultivated, i...
متن کاملPicophytoplankton during the ice-free season in five temperate-zone rivers
Although picophytoplankton (PP) (0.2-2 µm) are ubiquitous in lakes and oceans, their importance in rivers has rarely been studied. We examined PP assemblages during the ice-free period in five rivers of a temperate region varying in trophic state (9-107 µg/L total phosphorus) and water discharge (1-87 m3/s). In these rivers, PP abundance reached concentrations as high as those observed in lakes...
متن کامل