Acid Rain and Environmental Problems: Implications for the Teaching of Biology in Schools in Riverine Communities

Osu, Samuel Robert; Ekpo, Mary Okon

doi:10.5901/ajis.2013.v2n12p101

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…It also decreases the growth of forest trees (Osu and Expo 2013). A number of studies have shown that acid rains have serious effects on vegetative organ and generative structure [3,4]. Acid rain induces changes in cellular biochemistry and whole plant physiology.…”

Section: Introductionmentioning

confidence: 99%

Physiological and Morphological Responses of Amaranthus hybridus L. (Green) to Simulated Nitric and Sulphuric Acid Rain

Mofunanya

Soonen

2017

BJAST

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Aims:To determine the physiological and morphological responses of Amaranthus hybridus leaf area, shoot height, stem girth, leaf number, petiole length, fresh weight (FW) and dry weight (DW) of leaf, shoot and root, relative growth rate (RGR) and chlorophyll (chl.) content to simulated nitric and sulphuric acid rain. Place and Duration of Study: Methodology: Thirty five poly bags were used. Simulated nitric and sulphuric acid rain (SNAR and SSAR) of pH 2.0, 3.0, 4.0 and a control pH of 6.0 were separately prepared and sprayed every two days. The research was carried out in a greenhouse under controlled conditions. Results: Results showed highest decreases at pH 2.0 and lowest decreases at pH 4.0 in all the physiological parameters studied. Highest decreases are depicted by lowest measured values while lowest decreases by highest values in all measured parameters as affected by SNAR and Mofunanya and Soonen; BJAST, 21(4): 1-12, 2017; Article no.BJAST.31863 2 SSAR. Acid rain treated plants showed necrosis, chlorosis and leaf deformation. Chlorophyll a, b and total chlorophyll of acid rains treated plants revealed a trend of decrease in content with increasing period of development. Mean values for leaf area response to simulated HNO 3 and H 2 SO 4 acid rains of pH 2.0, pH 3.0 and pH 4.0 at 4 weeks period of development were 14.60±0.33 d , 17.50±0.47 d , 18.80±0.11 d and 14.94±0.23 d 17.70±0.20 d , 17.92±0.28 d as against control value of 22.62±0.26 d cm 2 . Mean values for shoot height response to acid rains had values of 16.48±0.59 d , 19.65±0.66 d , 20.46±0.88 d , 15.82±0.59 d and 18.27±0.12 d , 19.74±0.17 d and 24.48±0.23 d cm. Mean values for chl. a, b and total chl. at 28 days for SNAR and SSAR pH 2.0 and pH 6.0 were 18.9±0.12, 23.4±0.04 mg g -1 FW and 42.3, 20.0±0.3, 23.6±0.3 mg g -1 FW and 43.8 and 58.2 0.3, 71.2 0.3 mg g -1 FW and 129.4 respectively. Original Research Article Conclusion:Physiological and morphological parameters studied responded negatively to simulated nitric acid (HNO 3 ) and sulphuric acid (H 2 SO 4 ) rain with significant decrease at all acidity levels with respect to the control.

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Section: Introductionmentioning

confidence: 99%

Physiological and Morphological Responses of Amaranthus hybridus L. (Green) to Simulated Nitric and Sulphuric Acid Rain

Mofunanya

Soonen

2017

BJAST

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Effects of water acidification on immune responses of the gercacinid, Cardiosoma armatum (Herklots, 1851)

Lawal-Are¹,

Moruf²,

Olaniyi³

et al. 2021

NJPAS

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The biological response to chemical pollutants reflects the acid–base status of an aquatic ecosystem. The gercacinid, Cardiosoma armatum (75±0.1 g) was exposed to acidified waters to evaluate the effects on its immune parameters. The crabs were exposed to pH 4.0, 5.0, 6.0 and 7.8 (control) for 28 days. The hematological parameters of control crabs and crabs exposed to varied doses of acidified water indicated a marked reduction. Significant (p<0.05) higher alkaline phosphatase and albumen were obtained in pH 4.0, 5.0 and 6.0 compared to control; other values were mostly similar to control. The highest superoxide dismutase (SOD) (252.61±0.06 min/mg pro) was recorded in control group, while highest CAT activity (2.08±0.16 min/mg protein) was recorded in crabs exposed to pH 4 treatment. Furthermore, the control group's SOD activity was significantly higher than the exposed groups. With a lower pH, the quantities of malondialdehyde increased substantially and were significantly different from the control group. While these findings demonstrate that changes in pH have limited impact on energy use, decreasing immune system conditions show that C. armatum is susceptible to pH variations and may be influenced in aquaculture, where a pH drop is more prominent.

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Acid Rain and Environmental Problems: Implications for the Teaching of Biology in Schools in Riverine Communities

Cited by 2 publications

References 6 publications

Physiological and Morphological Responses of Amaranthus hybridus L. (Green) to Simulated Nitric and Sulphuric Acid Rain

Physiological and Morphological Responses of Amaranthus hybridus L. (Green) to Simulated Nitric and Sulphuric Acid Rain

Effects of water acidification on immune responses of the gercacinid, Cardiosoma armatum (Herklots, 1851)

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