By John D. Wehr, Robert G. Sheath, Patrick Kociolek, James Thorp
Publish 12 months note: First released November nineteenth 2002
Freshwater algae are one of the such a lot assorted and ubiquitous organisms on the earth. They occupy an important variety of ecological stipulations from lakes and rivers to acidic peat swamps, inland saline lakes, snow and ice, damp soils, wetlands, desolate tract soils, wastewater remedy vegetation, and are symbionts in and on many crops, fungi, and animals. In North the US, the range of freshwater habitats colonized via algae is particularly wealthy, and provides a massive and engaging variety of environments for his or her examine.
They shape the bottom of such a lot aquatic nutrients webs and are serious to reviews of surroundings wellbeing and fitness. Algal ecologists and taxonomists play a tremendous position within the figuring out of aquatic ecosystems: their biodiversity, productiveness, interactions with different organisms, and water caliber. This booklet presents in a single quantity a pragmatic and complete advisor to the genera of freshwater algae recognized from North the USA. The structure combines the mandatory ecological, taxonomic and methodological details for all scientists operating in aquatic environments, even if their area of expertise is in environmental tracking and water caliber review, organic composition, ecology, evolution, or molecular biology.
• the 1st entire accounting of North America's freshwater algal genera in additional than 50 years
• contains a consultant to the present literature on species id in every one crew of algae
• fine quality images and drawings of greater than 770 genera
• a transparent, easy-to-use introductory key to the diagnostic chapters
• artificial chapters on freshwater habitats, use of algae in environmental review, and regulate of nuisance algae
• Contributions from 27 specialists in all components of freshwater algae
• vast literature citations
• spouse quantity of Ecology and category of North American Freshwater Invertebrates 2d version, edited by way of Throp and Covich
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Extra info for Freshwater Algae of North America: Ecology and Classification (Aquatic Ecology)
Freshwater Habitats of Algae the water column. A strong depth to surface area ratio is usually necessary to maintain meromixis; Fayetteville Green Lake in New York and Hot Lake in Washington are examples (Hutchinson, 1957). 2. 05–1 μg chlorophyll-a L–1) to eutrophic (> 1000 mg C m–2 d–1; 15–100 μg chlorophyll-a L–1), and these levels are influenced, at least in part, by the properties of lake basins (Wetzel, 1983a; Likens, 1985). Oligotrophic lakes are poor in nutrients, usually deep and steep-sided, and have high transparency, a narrow littoral zone, abundant dissolved oxygen with depth, and larger relative hypolimnion volume.
Factors That Regulate Phytoplankton Production in Lakes A large body of data clearly indicates that phytoplankton production and biomass in most lentic systems is controlled by P supply (Schindler, 1978; Wetzel, 1983a; Hecky and Kilham, 1988). , grazing, light availability, temperature) are clearly involved in regulating phytoplankton production, only nutrients are amenable to regulation (Schindler, 1978). This concept was demonstrated in Lake Washington, which received secondary sewage (a source of P) from the city of Seattle.
Planktonic cyanobacteria and desmids produce extracellular mucilage, which may aid in buoyancy (Round, 1981). Some cyanobacteria, such as Anabaena flos-aquae and Microcystis aeruginosa, also maintian their position in the water column using gas vacuoles (Chaps. 3 and 4). Observed changes in the population size may be the result of differences in vertical migration and sinking to lower strata, rather than actual changes in numbers. Regular seasonal changes (seasonal succession) in phytoplankton populations over many years have been observed widely and reported in long-term limnological records.
Freshwater Algae of North America: Ecology and Classification (Aquatic Ecology) by John D. Wehr, Robert G. Sheath, Patrick Kociolek, James Thorp