Elevated CO2 effects on corticolous lichen and bark pH in free-air CO2 enrichments (FACE) station

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Authors: A. Abas and M.S. Nizam
Date: Jan. 2017
From: Advances in Environmental Biology(Vol. 11, Issue 1)
Publisher: American-Eurasian Network for Scientific Information
Document Type: Report
Length: 2,248 words

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Carbon dioxide (CO2) elevation in the atmosphere is the major cause for global warming and climate change. Corticolous lichen and bark pH are among of got affected. This study was conducted to analyze the relationship between corticolous lichen distribution and bark pH from two stations (FACE Staion and Control Station). Three major procedures were introduced in this research, lichen morphology observation, lichen distribution count and bark pH measurement. For lichen morphology observation, Cryptothecia striata was chosen to be observed. For lichen distribution method and bark pH measurement, 15 samples collected from each station. There were differences between both stations for this species in term of its morphological features moreover on its thallus colour and prothallus textures. For lichen distribution and bark pH, 15 trees were selected from both stations, all the data recorded then been analyzed using MANOVA. According to MANOVA, there was a significant relationship between bark pH and lichen distribution from both station where lichen's distributions gradually decrease and bark pH had an increment in term of acidity from Control Station to the FACE Station. Hence, this shows that lower plant such as lichen also affected by the increment of CO2.

KEYWORDS: Carbon dioxides, Lichens, Air pollution, FACE Station


Carbon dioxide (CO2) in the air stimulates the growth of almost all plants on Earth. Photosynthesis primarily occurs in the leaves. This process requires sunlight, water and carbon dioxide, which are all acquired by and transported to the leaves. Plants obtain water through their roots, and they get sunlight through chlorophyll, which is a green pigment found in plant cell structures known as chloroplasts. The elevation of CO2 in the surroundings does not necessarily good for plants. The elevation of CO2 will increase temperatures throughout the Earth. Plus, it also will increase the need of water for the plants to undergo the photosynthesis process. High absorption of water from the surrounding will reduce the humidity hence; increase the temperature [1]. CO2 is the main contributor to climate change, especially through the burning fossil fuels. Increment of CO2 in the atmosphere not only increasing the temperature by trapping the sun's heat, but it's also effecting the vegetation of trees and lower plants such as lichen [4].

Lichens are composite organisms comprised of a fungus and one or more algae living together in symbiotic association in which the algal partner produces essential nutrients for the fungal partner through photosynthesis, while the fungal partner provides mechanical support to the algal partner [9]. Lichen diversity has been found to be highly affected by the air quality of an area as lichens are sensitive to phytotoxic gases especially sulphur dioxide which impairs the photosynthetic apparatus by irreversible conversion of chlorophyll a in phaeophytin [6]. Corticolous lichen can be found on any types of bark depending on the pH congeniality [8].

In Malaysia, a limited number of studies have used lichens as indicators of air pollution, especially to evaluate lichens response on elevation of CO2 levels. The negative effects of warming on the...

Source Citation

Source Citation
Abas, A., and M.S. Nizam. "Elevated CO2 effects on corticolous lichen and bark pH in free-air CO2 enrichments (FACE) station." Advances in Environmental Biology, vol. 11, no. 1, 2017, p. 68+. Accessed 8 Mar. 2021.

Gale Document Number: GALE|A488971543