The Dales (Christmas Island)

The Dales is a wetland site located at the western end of Christmas Island, an Australian external territory in the eastern Indian Ocean. The site has been recognised as being of international importance by designation under the Ramsar Convention on Wetlands.

For the BBC radio soap opera, see Mrs Dale's Diary.

Designations
Official nameThe Dales, Christmas Island
Designated21 October 2002
Reference no.1225[1]

History

The Dales were the first location where Europeans set foot on Christmas Island in 1688, during the expedition of William Dampier. Nowadays the Dales are visited by local residents and tourists for sightseeing. One of the subsites, Hugh's Dale, has religious significance for Buddhists of Chinese background.[2]

Description

The site comprises a system of seven watercourses within the Christmas Island National Park, including permanent and perennial streams, permanent springs, the Hugh's Dale waterfall, and most of the surface water on the island.[2] The site is set within tropical rainforest and adjoins the coast. The streams originate from groundwater seepages and flow into the ocean having, over time, worn gullies into the coastal cliffs.[3] It was designated on 21 October 2002 as Ramsar Site 1225, and is the first Australian Ramsar site to contain both surface and subterranean karst features.[2] Area of Ramsar site is about 57 ha. It was also listed on the Directory of Important Wetlands in Australia prior to 2001.[4]

Interesting geological features of the Dales are travertine and rimstone formations of Hugh's Dale and the gully of Sydney's Dale, which closer at the sea gets up to 12 m deep and 9 m wide.

Flora and fauna

The site contains a unique stand of enormous Tahitian chestnut trees. Sydney Dale is a recorded site for the critically endangered endemic fern, the Christmas Island spleenwort. The various wetland types of the Dales support populations of endemic and threatened animals, including the Christmas Island hawk-owl, Christmas Island goshawk, Abbott's booby, Christmas Island shrew and the Christmas Island blind snake. Coastline habitats within the site provide breeding and spawning grounds for red and blue crabs. The main threat to the site comes from introduced species, in particular the yellow crazy ant[2] and the development of Immigration Reception Centre nearby, above the springs.

Access

The road to the site's car-park is for 4WD vehicles only. There are walking tracks from the car-park to Hugh's Dale and Anderson's Dale, with interpretive signage for visitors.[3]

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gollark: !gay <@509849474647064576>
gollark: We clearly need more data, and to see if the result is reproducible.
gollark: Yes, I was getting to that, some detection principles are wrong in some scenarios.
gollark: For example, gay-EM interference detectors detect gay by running light through long fibre-optic cables and detecting small rainbow disturbances produced by interaction with the gay field.

References

Notes
  1. "The Dales, Christmas Island". Ramsar Sites Information Service. Retrieved 25 April 2018.
  2. Annotated Ramsar List.
  3. Blowholes, beaches... etc.
  4. Eyles et al, 2001, pages 117 & 120

Sources


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