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Essay / Human alterations, deforestation and its adverse effects
Human Development Index (HDI) information on life expectancy, education levels, adult literacy and gross domestic product (GDP ) were used to compare countries with high deforestation rates. . A World Bank database was used to obtain deforestation rates, population growth rates and HDI values. Statistical analyzes used were t-tests and correlation coefficients to examine correlations between different factors. Scatterplots were used to observe how well the results reflected the Kuznets curve; an inverted U-shaped curve predicting that deforestation will increase, reach an equilibrium, and then decrease. After two decades, Jha and Bawa found that the human population growth rate and HDI were increasing with deforestation rates ranging from 1.2% to 3.1%, and population growth ranging from 0.9%. at 3.1%. 3.8% and HDI 0.34 – 0.80. Increasing HDI correlates with higher education levels, lower fertility levels, and longer life expectancy. A strong correlation (r=0.53) was found between human population growth rate and deforestation (p<0.001) (QUOTE). HDI and deforestation had a p-value of 0.02 and an r-value of -0.40, a strongly negative correlation. The Kuznets curve was not supported by the results, as deforestation continued to increase rather than stabilize. Population growth and HDI show a correlation with deforestation rates but these correlations have weakened over time, Jha and Bawa concluded that population and HDI values influence deforestation. Jha and Bawa's hypothesis received support, although not as strongly as initially expected. They concluded that in addition to population values and HDI, political changes and development rates could affect deforestation rates. A generalized conclusion is that increasing population size in underdeveloped ecosystems...... middle of paper ... terrestrial ecosystems. Human-dominated ecosystems. ScienceMag 277: 494-499. Jha S, Bawa KS. 2005. Population growth, human development and deforestation in biodiversity hotspots. Conservation Biology 20: 906-912. Webb TJ, JK Gaston, H. Lee and IF Woodward. 2005. Coincident scales of forest feedback on climate and conservation in a diversity hotspot. The Royal Society 273: 757-765.xFreedman AH, W. Buerman, ETA Mitchard, RS DeFries and TB Smith. 2010. Human impacts flatten the rainforest-savannah gradient and reduce adaptive diversity in a rainforest bird. PloS ONE 9: e10388. Hahn, MB, RE Gagnon, C. Barcellos, GP Asner and JA Patz. 2014. Influence of deforestation, logging and fires on malaria in the Brazilian Amazon. PLoS ONE 1: e85725.Schmidt LM. 1930. The agricultural revolution in the United States 1860-1930. Science 72: 585-594.