Dawson, F.H. (1989) Natural habitat and population control mechanism of Crassula helmsii (Australian Swamp Stonecrop) in Australia. Ambleside, UK, Freshwater Biological Association, 33pp. (RL/T11053F2/1).
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The plant Crassula helmsii (Kirk) Cochayne, was likely to become widely distributed and to dominate many damp and wet areas of nature reserves, recreational waters and agricultural drainage of Britain. The aim of this report was to study Australian Swamp Stonecrop in its natural habitat where it is in balance with its environment. This contrasts with its rapid and widespread distribution in the U.K. where its growth interferes with the use of fisheries and amenity lakes but also reduces the value of nature reserves and sites of special scientific interest by suppressing native flora. It was proposed to observe its growth at a variety of sites over its natural distribution and to include some environmental factors, e.g. water-level, water-chemistry (nutrients, acidity and alkalinity), frost-tolerance, salinity, with the help of portable sensors, locally-available services or data. 8 weeks of travel in Australia allowed time to study the plant in its natural habitat including the coastal areas of the southern half of the continent i.e . Western Australia, South Australia, New South Wales, Victoria, Tasmania and southern Queensland. The overall objective was to determine the environmental range by visits to selected sites of Crassula helmsii over its geographic range.
|Item Type:||Monograph or Serial issue|
|Title:||Natural habitat and population control mechanism of Crassula helmsii (Australian Swamp Stonecrop) in Australia|
|Number of Pages:||33|
|Publisher:||Freshwater Biological Association|
|Place of Publication:||Ambleside, UK|
|Issuing Agency:||Freshwater Biological Association|
|Uncontrolled Keywords:||Plant control; Plant populations; Aquatic plants; Introduced species; Australia; Crassula helmsii|
|Depositing User:||Hardy B Schwamm|
|Date Deposited:||04 May 2011 14:17|
|Last Modified:||29 Sep 2011 17:13|
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