New PDF release: Algal ecology : freshwater benthic ecosystems

By R. Jan Stevenson, Max L. Bothwell, Rex L. Lowe, James H. Thorp

ISBN-10: 0126684502

ISBN-13: 9780126684506

Algae are an immense component to aquatic benthic ecosystems simply because they mirror the future health in their surroundings via their density, abundance, and variety. This complete and authoritative textual content is split into 3 sections to provide entire assurance of the dialogue during this box. the 1st part introduces the destinations of benthic algae in numerous ecosystems, like streams, huge rivers, lakes, and different aquatic habitats. the second one part is dedicated to some of the elements, either biotic and abiotic, that have an effect on benthic freshwater algae. the ultimate portion of the e-book specializes in the position performed by way of algae in numerous complicated freshwater ecosystems. As predicament over environmental healthiness escalates, the keystone and pivotal position performed via algae is turning into extra obvious. This quantity within the Aquatic Ecology sequence represents a major compilation of the newest examine at the the most important area of interest occupied by means of algae in aquatic ecosystems. Key gains* provides algae because the vital participant on the subject of environmental health and wellbeing* ready by way of major gurus within the box* contains finished therapy of the features of benthic algae in addition to the standards that have an effect on those very important aquatic organisms* Acts as a tremendous reference for someone drawn to realizing and handling freshwater ecosystems

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Extra resources for Algal ecology : freshwater benthic ecosystems

Example text

Many measurements are used to estimate algal biomass (Table II). Measurements of the area-specific masses of matter (such as chl a, C, N, or P, dry mass, and ash-flee dry mass cm -z) are relatively inexpensive methods for estimating algal biomass, however, their accuracy (susceptibility to bias) is lower than that of cell-counting methods. Chlorophyll a and other pigments are chemicals found only in algae in most benthic algal samples, unless plant or moss material also occurs in samples. Therefore, chl a and pigment densities more accurately indicate algal biomass than C, N, or P, which can be found in any living or nonliving organic matter.

Many species of algae are distinctly more common in benthic than in planktonic habitats. Some major taxonomic groups of algae can be characterized as "benthic" or "planktonic," such as orders of filamentous green algae and pennate diatoms that are generally benthic and the Volvocales and centric diatoms that tend to be planktonic. Other groups have been poorly characterized or have species that are found in either the benthos or plankton, such as many orders of blue-green algae and the diatom genera Fragilaria, Synedra, and even Nitzschia.

29, 122-139. Biggs, B. J. F. (1988). Algal proliferations in New Zealand's shallow stony foothills-fed rivers: Toward a predictive model. Verb--Int. Ver. Theor. Angew. Limnol. 23, 1405-1411. Biggs, B. J. F. (1990). The use of relative specific growth rates of periphytic diatoms to assess enrichment of a stream. N. Z. J. Mar. Freshwater Res. 24, 9-18. Biggs, B. J. E (1995). The contribution of flood disturbance, catchment geology and land use to the habitat template of periphyton in stream ecosystems.

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Algal ecology : freshwater benthic ecosystems by R. Jan Stevenson, Max L. Bothwell, Rex L. Lowe, James H. Thorp

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