Solomons Jewel Lake occurs in an area of subalpine woodland with patches of cool temperate rain forest and the conifer Athrotaxis cupressoides, which is found mainly along stream channels. A pollen record shows that the main vegetation types have not varied throughout the last 4000 years but subtle changes are evident in some elements. Apart from a reduction in Eucalyptus for about 300 years, beginning around 3500 BP, the sclerophyll vegetation has remained relatively unchanged. A small decline in rainforest taxa began around 1700 BP, followed by an expansion of Sphagnum from 1200 BP, then Athrotaxis cupressoides and Cyperaceae from 800-900 BP. These trends probably represent a chain of events associated with a cooling which reduced rain forest and allowed wetland areas to expand. These then provided additional habitat for Athrotaxis cupressoides which expanded because the wetlands provided additional protection from fire.
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