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Developments in Microbial Source Tracking: Digital PCR, CA Source ID Manual, US EPA tests
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In Mackay JT ed. Finding References. Retrieved 7 October Email the author Login required.
Most are aquatic and autotrophic and lack many of the distinct cell and tissue types, such as stomata , xylem , and phloem , which are found in land plants. The largest and most complex marine algae are called seaweeds , while the most complex freshwater forms are the Charophyta , a division of green algae which includes, for example, Spirogyra and stoneworts. No definition of algae is generally accepted. One definition is that algae "have chlorophyll as their primary photosynthetic pigment and lack a sterile covering of cells around their reproductive cells". Algae constitute a polyphyletic group  since they do not include a common ancestor, and although their plastids seem to have a single origin, from cyanobacteria,  they were acquired in different ways. Green algae are examples of algae that have primary chloroplasts derived from endosymbiotic cyanobacteria. Diatoms and brown algae are examples of algae with secondary chloroplasts derived from an endosymbiotic red alga.
Archived from the original on 19 May By Rosalina Stancheva. Cryptogamieor computer - no Kindle device requir. Category WikiProject.
We strongly recommend this book to be included in your personal and institutional library. The Editors and their Contributors have done an outstanding job in synthesizing this mass of data, and there is no doubt that this work will be a standard reference, to be followed by up-dated editions. Any student, researcher, or environmental management professional who routinely works with freshwater ecology should have access to this authoritative and thorough book. The coverage is comprehensive both taxonomically in the range of ecological topics. For those of us specializing in freshwater algae, whether it be identifying them or studying their ecology, this kind of text will be an invaluable reference work. Smith's Freshwater Algae of the United States. It is truly impressive work