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

ISBN-10: 0126684502

ISBN-13: 9780126684506

Algae are a big element of aquatic benthic ecosystems simply because they mirror the healthiness in their setting via their density, abundance, and variety. This accomplished and authoritative textual content is split into 3 sections to supply entire insurance 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 impact benthic freshwater algae. the ultimate portion of the booklet makes a speciality of the function performed by means of algae in numerous complicated freshwater ecosystems. As drawback over environmental future health escalates, the keystone and pivotal function performed by means of algae is changing into extra obvious. This quantity within the Aquatic Ecology sequence represents an incredible compilation of the newest learn at the an important area of interest occupied by means of algae in aquatic ecosystems. Key gains* offers algae because the vital participant relating to environmental future health* ready via best specialists within the box* comprises entire remedy of the capabilities of benthic algae in addition to the criteria that have an effect on those vital aquatic organisms* Acts as a big reference for an individual attracted to figuring out and coping with freshwater ecosystems

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In addition to resource availability, ecophysiology, life histories, stress, allelopathy, competition, and predation are causes of differential species performance. , 1991). Environmental stress is the deviation in environmental conditions from species optima, for example, in pH, salinity, or temperature. Environmental stress may affect species resource utilization efficiency and life-history characteristics. Allelopathy is a biotically based environmental stress about which little is known. Different algal species may have different competitive abilities that are important when algal density limits transport of nutrients from the regional to the local species pool, but little experimental evidence exists to support this hypothesis (McCormick and Stevenson, 1991; Stevenson, in press).

They may become trapped between surface and substrata near shorelines or actually entangled with plants or other substrata. Denser assemblages of filamentous blue-green algae~ diatoms, bacteria, and fungi can also form floating surface assemblages at the water surface that are usually entangled among or attached to substrata. The origin of metaphyton is usually algae from other substrata, typically epiphyton (see Goldsborough and Robinson, Chapter 4), but epipelon and epilithon can also form floating mats of microscopic organisms when they slough from submerged substrata.

We (M. L. Bothwell, R. L. Lowe, and I) have tried to standardize use of most terms in the chapters because consistency does facilitate communication. Benthos refers to organisms living on the "bottom" or associated with substrata. Wetzel (1983a) considers benthos to be the animals associated with any solid-liquid substratum. Common use of the term benthos includes most organisms associated with substrata in aquatic habitats: fish, macroscopic invertebrates and meiofauna, fungi, bacteria, and even hyporheic (below substratum surface) organisms.

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