Vai trò của bioindicators

An understanding of microbial biomass and microbial activity as part of belowground processes as affected by elevated CO2 is crucial in order to predict...

9p nhoxden_20101991 13-06-2011 84 7   Download

A variety of organisms have been investigated to evaluate their potential as biological indicators of different forms of pollution in the aquatic environment (e.g. review by Gunkel 1994). Certain species have been identified as being highly sensitive either in their physiological response to aquatic contaminants or in their ability to accumulate particular toxins in a dose-time dependent manner.

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Field and laboratory studies were conducted to evaluate the use of bacterial growth on aquatic insects as a metric for determining the existence of nutrient impacts in wetlands. Results from field investigations indicated that elevated concentrations of nitrate and phosphate...

10p nhoxden_20101991 13-06-2011 103 9   Download

Toxic chemicals introduced into the environment can penetrate ecosystems and can be found in the whole biosphere. Chemical contamination may affect ecosystems, causing changes in the functions of particular organisms. Adverse effects of xenobiotics and their metabolites on living organisms can be observed.

12p nhoxden_20101991 13-06-2011 94 6   Download

The indicator qualities of terrestrial invertebrates are widely recognized in the context of detecting ecological change associated with human land-use. However, the use of terrestrial invertebrates as bioindicators remains...

16p nhoxden_20101991 13-06-2011 91 5   Download