he world’s climate is changing, and the changes will have an enormous impact in ourforest ecosystem.

The latter is known for its lichen cover whose important role in nature is a bioindicator of climate change. Bukidnon is a mountainous province located in central Mindanao. The elevation rangesfrom 622 meters above sea level to 2941 meters above sea level. The whole province issurrounded by mountain ranges that are associated with fertile plains, inner valley, lakes, andouter flood plains. The place gets its most of its moisture from the precipitation which mostlyoccurs whole year round, except during isolated cases of drought. As such, Bukidnon mountainshouse of vegetation which is rich in biodiversity. A number of studies have already beenconducted in biodiversity, but relatively few studies on elevational richness patterns for lichenshave been undertaken (Kessler 2000; Bruun et al. 2006; Grytnes et al.

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2006). Lichens are small plants, with slow growth and thrive in cool environment in higherforest elevation and are estimated about 20,000 species worldwide. They have a wide variety ofgrowth forms, such as crustose, foliose and fruticose. These group also grow on a wide range ofsubstrates both natural and man-made and obtain their required nutrients and water quality fromthe atmosphere thus, are highly sensitive to atmospheric changes and are excellent bio indicatorsof environment quality (Dyer and Letourneau, 2007; Mc Cure, 2000).

The present status of climate change and air pollution had been a critical factor inaffecting diversity status and population of lichens. The lichen flora species is noted being anatural indicator of climate change and air pollution effects and is very useful for monitoringexisting species along in mountain region. Thus lichens represent a significant proportion ofbiodiversity in many ecosystems because of their moderate tolerance to environmental variation.The different growth forms exhibits variation in their morphology structures like the Crustoselichens usually form a crust on surface of the rock or material thus their fat body structures areclosely attached to the substrate. The Foliose or leafy lichens on the other hand, are leaf-like andcan survive in a place that has small amount of air pollution; whereas the Fruticose or shrubbylichens are fastest growing type and are attached to their substrate very loosely causing them tohang in the trees and seen bushy.

These type of lichen really needs fresh air enable to survivethus when there are no fruticose observed then the environment is said to be polluted. This reportalso examines how altitude, air temperature, relative humidity, and pH affect the growth rate andthe number of types of lichens other than air quality. Air pollution is still unresolved and continuously destroys the environment including theforest ecosystem with air pollution affects the production, growth development of the floralspecies, thus kills the biodiversity of the species inhabiting the said area. To preserve and manage the species, it is important to monitor the atmospheric condition of the remaining forestin different locations. In as much that, only few researchers has been working on lichens, the present studyhopes to contribute on the taxonomy status and ecological distribution of lichens in BinahonAgroforestry Farm.