Synopsis
In this note the Diatoms from the Gujarat College compound are systematically described and some notes or remarks are given on their occurrence, ecology and distribution in the region of Ahmedabad.
Summary
While summarizing the results of the present investigation, the following could be stated:
that with the exception of two small notes by the author there exists little information of the Diatomflora of Ahmedabad region.
The diatoms of the present area are a special kind of biotopes characterised by small size. However, the causes leading to this nannism remain to be determined.
The observations regarding Caloneis beccariana (Grun.) Cl. and Amphiprora paludosa W S m. v. subsalina Cl., found to be in close harmony with those of HUSTEDT and CLEVE, respectively and further it is confirmed that they are very variable species.
The water of the present locality could be called somewhat brackish on the basis of a large number of salt-loving diatoms being found here. Moreover, they are all alkaliphilous even the new entities with the exception of two which are known to be indifferent for the pH.
In light of the existing Halobion data and local observations some of the new entities and a few others are assigned their Halobion status. The spectrum relating to the same is also given.
The distribution of these diatoms is indicated for the region of Ahmedabad.
With regard to their periodicity recorded for over a year it was observed that almost all the species were perennials and a few among them showed slight rises any time from September to December.
Lastly, in all twenty-three diatoms are recorded from the present area representing ten genera. Of these, six are new records for India and three species and one variety is considered to be new.
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N.B.: The following “ERRATA” appear to be necessary in HYDROBIOLOGIA Vol. XIV, no. 2, 15.12.1959, and the author is sorry that through oversight they remained so long.
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Gandhi, H.P. Notes on the Diatomaceae of Ahmedabad and its environs. Hydrobiologia 17, 218–236 (1961). https://doi.org/10.1007/BF00028995
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DOI: https://doi.org/10.1007/BF00028995