| Abstract: | ![]()
Algal bioassays employing the test alga Selenastrum capricornutum Printz. are a relatively simple and reliable method of studying the effects of aquatic pollutants on plant growth in natural and waste waters. Details of algal bioassays based upon Liebig's ‘Law of the Minimum’ are described to enable students in schools and universities to assess the relative potential fertility of freshwater bodies, to evaluate the growth-promoting effects of nitrates and phosphates, to identify growth-limiting nutrients, and to determine the growth-inhibiting effects of toxic pollutants. Examples taken from students' investigations of Welsh river waters are cited in support. |
