|Scientific Name:||Pinus palustris|
|Red List Category & Criteria:||Endangered A2cde ver 3.1|
|Reviewer(s):||Stritch, L. & Thomas, P.|
Outside protected areas the tendency through exploitation and planting or seeding of other pine species to replace this species is still ongoing, albeit at a lower rate than previously. Calculated over the whole of the historical period of logging in eastern USA this species would qualify for Critically Endangered, but with an estimate of 30 years generation length the time frame used here is more likely to place it as Endangered. The decline has also slowed down, but has not ceased.
|Range Description:||Recorded from the southeastern USA, from Virginia to eastern Texas in the Atlantic and Gulf Coastal Plains.|
Native:United States (Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Texas, Virginia)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The total population is still large but is decreasing and has become severely fragmented.|
|Habitat and Ecology:||Pinus palustris grows mostly in the warm temperate to subtropical coastal plain of the SE United States, but it extends into the uplands and foothills of the southern Appalachian Mountains to about 700 m a.s.l. It requires a warm, humid climate and a moist soil, although the latter can vary from wet, poorly drained clay in swampland to thin stony soils on rocky mountain slopes and ridges. For the most part soils are sandy, acidic and poor in nutrients. This species can grow in pure stands but is often found together with other pines, like P. elliottii, P. echinata and P. taeda. Many broad-leaved trees (angiosperms) grow with it, too, forming mixed forests on mesic sites with e.g. Quercus spp., Nyssa sylvatica, Liquidambar styraciflua, Cornus florida, Sassafras albidum, and Diospyros virginiana and many shrubs. In the foothills in Alabama many oaks (Quercus spp.) accompany Pinus palustris, forming mixed pine-oak woods. This species of pine is well adapted to fires through its grass stage and succeeds quickly from seed to take advantage of freed space and nutrients, while it can survive the next ground fire by resprouting from the very short stem until it has built enough of a root system to accelerate its stem growth dramatically and rise above the damaging flames.|
|Use and Trade:||Longleaf Pine is an important species providing good quality timber as well as naval stores derived from its resin. It was heavily exploited since Europeans settled in the Coastal Plains and served a major forest industry in the region. Its wood is used for sawlogs, stage flooring, plywood, pulpwood and produces poles, fence posts, and piling as it makes straight stems largely free of branches when grown in closed stands. Turpentine and other chemicals can be distilled from the chipped wood and even stumps of trees are pulled from the soil for this purpose. Longleaf Pine is not planted for forestry outside its natural range and it is relatively rare as an amenity tree, mainly confined to coastal areas in the SE of the USA. The species is somewhat difficult to grow through its 'grass stage' to the sapling stage and beyond and needs a protected location in a mild climate|
|Major Threat(s):||Pinus palustris was once the most common pine in the Coastal Plains, perhaps covering 25 million ha. Exploitation for timber and naval stores and conversion to farmland and pasture reduced this by 1985 to less than 1.6 million ha. An estimate given by Gilliam and Platt (2006) arrived at a reduction from 12 million ha in 1950 to 5 million ha in 2000. This decline, although its rate has now slowed, is ongoing. Foresters and landowners prefer other species that do not delay initial growth with a grass stage and many sites originally occupied by P. palustris are now dominated by other species. Prevention of fires increases competition from herbs and shrubs as well as other pines, as the seedlings of P. palustris do not initially grow in height, unlike other pines common on the Coastal Plains.|
|Conservation Actions:||Controlled burning is necessary for its successful establishment, but only P. palustris will survive this at a juvenile stage and in managed pine forest this practice would exclude other pine species. This species occurs in several protected areas where such management is practicable; these reserves should be increased in number and size so as to include the genetic diversity of this pine throughout its range.|
Burns, R.M. and Honkala, B.H. 1990. Silvics of North America. USDA, Forest Service, Washington, DC.
Farjon, A. 2010. Conifer Database (June 2008) In Species 2000 & ITIS Catalogue of Life: 2010 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., eds). Reading, UK. Available at: http://www.catalogueoflife.org/.
Farjon, A. 2010. A Handbook of the World's Conifers. Koninklijke Brill, Leiden.
Gilliam, F.S. and Platt, W.J. 2006. Conservation and restoration of the Pinus palustris ecosystem. Applied Vegetation Science 9: 7-10.
IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.1). Available at: http://www.iucnredlist.org. (Accessed: 12 June 2013).
|Citation:||Farjon, A. 2013. Pinus palustris. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 21 December 2014.|