Fire

Fires may be the result of natural phenomena such as lightning or they may be man-induced. Usually natural fires are an integral part of plant community development and influence such things as soil nutrient availability and biological diversity. In contrast, uncontrolled or wildfires disrupt such processes and can have a catastrophic impacts. The vast majority of wildfires are intentionally set and often occur in conifer forests. In recent years extended droughts, together with the rapidly expanding exploitation of tropical forests and the demand for the conversion of forests to other land uses, have resulted in a dramatic increase in wildfires. While some conifers have evolved to be fire dependent by having serotinous cones that open and release their seed in response to fire, their populations are so small or fragmented that even natural fires may be catastrophic. This is particularly evident in areas with a Mediterranean climate. It is the introduction of inappropriate fire regimes (frequency, severity, or seasonal timing) that can have the most severe impact.

Taxa in the category - Fire:

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Pinus tecunumanii F.Schwerdtf. ex Eguiluz & J.P.Perry

Has a scattered distribution in Central America where it is threatened by logging, forest clearance, fire and grazing Read full species entry >

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Pinus torreyana Parry ex Carrière

Distributed in California, USA with two subspecies, one on the mainland and one on Santa Rosa Island. Both have very restricted distributions and small population sizes. On the mainland, outside of the main protected area of Torrey Pines State Park it is threatened by urbanisation. Read full species entry >

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Pinus torreyana subsp. insularis J.R.Haller

A very small population found on Santa Rosa Island in California, USA where potential threats include pests and diseases and fire. Read full species entry >

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Podocarpus buchii Urban

Endemic to the Dominican Republic and Haiti where it is mainly threatened by habitat loss due to agriculture, logging, fire and tornadoes. Read full species entry >

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Podocarpus capuronii de Laub.

One of five threatened species of Podocarpus endemic to Madagascar where threats include deforestation, cutting for firewood, fires and grazing. Read full species entry >

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Podocarpus deflexus Ridl.

Currently known from two populations in Pahang (Peninsular Malaysia) and north Sumatera (Indonesia) where fire is a possible threat Read full species entry >

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Podocarpus gibbsiae N.E.Gray

Endemic to Mount Kinabalu in Sabah, Borneo where extreme droughts and tourism pose a potential fire hazzard. Read full species entry >

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Podocarpus nakaii Hayata

Endemic to Taiwan where historically it has suffered greatly from general deforestation and more recently there has been removal of mature trees for horticultural use. Read full species entry >

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