Australasia

Conifers which become stressed following habitat disturbance are often out-competed by better adapted native plant species.  For example, in Bosnia and Herzegovina regeneration in some populations of Picea omorika is being supressed by native Fagus sylvatica because of being better adapted to colonising disturbed forest areas. In Western USA fire-supression has reduced the ability of Cupressus bakeri (which is fire-dependent) to regenerate, hence it is gradually being replaced by Abies magnifica and A. concolor.  Native mistletoes species of the genera Arceuthobium, Phoradendron and Psittacanthus can have a deterimental affect on conifers in North America and Mexico. These shrubby, aerial parasites, which are bird dispersed or have explosive fruits, cause deformation of the infected stems, growth loss, increased susceptibility to other disease agents or insects, and reduced longevity. Species of Abies, Cupressus and Juniperus are particularly susceptable to infestation especially if stressed by habitat disturbance.

Taxa in the category - Australasia:

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Agathis atropurpurea B.Hyland

Endemic to Australia where as a result of past logging it has a very restricted distribution in Queensland Read full species entry >

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Agathis microstachya Bailey & C.White

Endemic to the Cook District of northeast Queensland, Australia where 50% of the population has been reduced by logging. Read full species entry >

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Araucaria heterophylla (Salisb.) Franco

Endemic to Australia (Norfolk Island Group) where historical logging and forest clearance significantly reduced the population. Today the main threats relate to the impacts of invasive non-native species. Read full species entry >

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Athrotaxis cupressoides D.Don

Endemic to Tasmania where the main threats are fire, grazing of regeneration and dieback caused by Phytophthora Read full species entry >

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Athrotaxis selaginoides D.Don

One of two Athrotaxis species endemic to Tasmania where historically it has suffered from fire and logging. Today, even with protection, there is a continuing decline due to fire. Read full species entry >

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Callitris oblonga A.Rich. & Rich.

Endemic to Australia where it occurs on the mainland and Tasmania. Threats include  forest clearance, fire, grazing, invasive species and soil erosion. Read full species entry >

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Pherosphaera fitzgeraldii (F.Muell.) F.Muell. ex Hook.f.

Native to a very small area in the Blue Mountains of Australia where threats include pollution, invasive plants species and extreme fire events Read full species entry >

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Prumnopitys ladei (F.M.Bailey) de Laub.

Endemic to Queensland, Australia where it occupies a very restricted area; mature individuals are estimated to number less than 1000. Read full species entry >

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