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Abstract:
Algal occurrence and distribution, with particular emphasis on the diatoms, were investigated over a 3 year period in a small, software upland stream. Different species dominated in contrasting habitats, e.g. epipelon, epilithon, epiphyton, the first being richest in species and showing the greatest variation over the year. Both species complement and abundance varied along the main part of the stream while a spring region had a contrasting flora and demonstrated little seasonal periodicity. Although some species have clear seasonal maxima, the presence of many others seems more closely related to their micro-habitat. The applicability of ecological preferences given in the literature is discussed in the light of distribution patterns in the Breitenbach.
