Invasive species

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 - Invasive species:

Page 1 of 6 pages  1 2 3 >  Last ›
 world map

blob indicating Eastern and southeastern USA	 on map

Abies fraseri (Pursh) Poir.

Distributed in three States of eastern USA but as a result of severe infestation from the Balsam woolly adelgid, only one population remains unaffected Read full species entry >

 world map

blob indicating Japan, Korea and Far East	 on map

Abies koreana E.H.Wilson

Endemic to four mountains in South Korea, the population suffers a range of threats including climate change, introduced pathogens and invasive native and non-native plants Read full species entry >

 world map

blob indicating Western Mediterranean on map

Abies pinsapo Boiss.

The Spanish fir has two subspecies distributed in southern Spain and northern Morocco where threats include fire, grazing and climate change. Read full species entry >

 world map

blob indicating Western Mediterranean on map

Abies pinsapo var. marocana (Trabut) Ceballos & Bolanos

The Moroccan fir is restricted to two small forests in the Rif Mountains of northern Morocco where over a period of 60 years it has suffered a 70% decline. Read full species entry >

 world map

blob indicating Southwest Pacific on map

Agathis montana de laub.

Endemic to the Mt. Panié range in northern New Caledonia where recent research has found that the decline and loss of old-growth trees is probably due to a combination of factors including root damage by feral pigs, pathogen attack and climate change. Read full species entry >

 world map

blob indicating Temperate southern America on map

Araucaria araucana (Molina) K. Koch

Endemic to southern Argentina and Chile where it mainly occurs in the Andes. Threats include fire, grazing and encroachment from commercial plantations of exotic species. Read full species entry >

 world map

blob indicating Australasia on map

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 >

 world map

blob indicating Southwest Pacific on map

Araucaria humboldtensis J. Buchholz

One of 13 species of Araucaria endemic to New Caledonia where it is restricted to less than five locations. There has been a recent decline in the health of some high altitude stands. Read full species entry >

Page 1 of 6 pages  1 2 3 >  Last ›