The Jocks Lagoon Ramsar Site is located about five kilometres south-east of the township of St Helens on the north-east coast of Tasmania. It is one of a chain of lagoons, swamps and wetlands occurring along St Helens Point. Jocks Lagoon is a small freshwater lagoon which is fed from surface runoff and groundwater. The site is located in sands and clays separated from the sea by a beach and sand dunes. The dominant vegetation community within the lagoon itself is freshwater aquatic sedgeland and rushland, with several beds of tall sedges and waterribbons as emergent plants. Spreading Swordsedge open sedgeland and Jointed Twigsedge dominate a small edge zone on the south-west side in a mixture with scrub. Melaleuca swamp forest dominates along the eastern side of the lagoon. On higher ground these communities become coastal heathland and Acacia coastal scrub with some areas dominated by the introduced Marram Grass. Most of the vegetation communities on the site are threatened in Tasmania. The site also contains two regionally rare plant species, the Jointed Twigsedge and Erect Marshflower. The lagoon supports microcrustaceans and macrocrustaceans, including Burrowing Freshwater Crayfish. The Brown Froglet and Eastern Banjo Frog also occur within the site. Most of the site is private freehold land, with a small section at the south-east end falling within the St Helens Point Conservation Area. The site is mainly used for conservation and recreation.
* About the images
We took care to attach appropriate images that are as close to representative of each species as our resources and the availability of images allowed. however, we could not ensure perfect accuaracy in every case. Some images show species that share the same genus but not at the species or subspecies level.
Government evidence of impact of climate change:
Australian Government, Jocks Lagoon Ramsar Site, Ecological Character Description
These threats include off road vehicles climate change alien species introductions fire chytrid fungus Phytophthora cinnamomi sand mining weeds acid sulphate soils neighbouring developments slashing . . . . . . .
Climate change could also change the ecological character of the site through changes to rainfall and temperatures; potentially altering the hydrology and the nature of the vegetation cover of the site.
Although climate change projections contain a high level of uncertainty in terms of magnitude; climate modelling predicts higher temperatures and increased evaporation across south eastern Australia (Timbal and Jones 2008).
Fire is potentially a very high risk to all components of the site.
Potential loss of the site’s vegetation cover through either very hot or frequent burning would impact landform stability; and therefore ultimately the site’s hydrology.