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Abstract

Pneumatophore density of mangrove Avicennia marina from different locations of Karachi ranged from 56-520 m-2 with a mean value of 278m-2 +/- 135 SD, their height ranged from 2-32 cm with a mean value of 11.8 +/- 3.2 SD and maximum thickness from 2-11 mm with a mean value of 6.3 +/- 1.57 SD. Pneumatophore density was positively correlated with tree height, tree girth and negatively with its own height. There was a positive relationship between the density and mud content in mangrove soil suggesting that mangroves adapt to anaerobic and water- logged conditions by increasing their numbers and hence large surface area for maximum aeration.

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