Tasmanian lowland Euphrasia species Flora Recovery Plan
Department of Primary Industries, Parks, Water and Environment, Hobart, 2011
Tasmanian Euphrasia subpopulations have been found to occupy two different types of habitats, namely, habitats kept open by exposure to extreme environmental factors such as wind and cold temperatures, and habitats kept open by disturbance such as fire, grazing or trampling. Subpopulations occupying the different habitats face different probabilities of extinction. Most Tasmanian lowland Euphrasia taxa are considered to be at risk either because of low numbers, restricted distributions, inappropriate disturbance regimes or threats to their lowland habitats. In general, sub-alpine and alpine Euphrasia subpopulations tend to occupy habitats that are kept open by exposure. Recruitment tends to be continuous in such subpopulations leading to smaller fluctuations in numbers and the area occupied. Generally, subpopulations tend to be relatively large. The likelihood of a detrimental change in land use is low for exposed sites and most of these sites are reserved. Sub-alpine and alpine Euphrasia taxa are less threatened and little can be done to improve their conservation status by management. Therefore, only lowland taxa have been included in this Recovery Plan. Lowland taxa that occupy exposed habitats have not been excluded from the Plan as some taxa are known to occupy both types of habitats and their inclusion facilitates an understanding of taxonomic relationships, which can be complex due to the influence of hybridisation.