Climatic condition alters due to global warming causes heat stress. Recently researchers examined how different temperatures have their own impact on the reproductive behavior and fertility by conducting a series of animal tests.
This study finding supported that heat stress developed due to climatic changes is one of the causes of reduced sperm production and alter mating behavior. An animal research findings reported that at both highest and lowest temperatures would be the barrier of fertility as males and female subjects were less interested to engage in copulation. Extreme climatic conditions also reduce the duration of copulation.
Anatomically, the male mammals have their testes outside the body cavity to avoid sperm damage by the excessive internal heat of the body. But heat stress generated due to climatic changes leads to reduced spermatogenesis and less effective sperm production. Both of these factors cause male infertility due to climatic changes.
Apart from this physiological explanation, limited resources due to climatic changes is another reason for the alteration of fertility. An international group of researchers recently reported that adoption to climatic changes might be a cause of human fertility changes.
Climatic changes lead to economical pressure, that enforces people to decide how much resources, both time and money they should invest in their child-rearing purposes. They also calculate and try to understand whether these resources they can utilize for giving birth to more children or invest more amount in the future of each child.
Environmental Research Letters published the research findings which estimated the financial strait through which climate change could affect fertility. The included factors are sectoral reallocation, the gender wage gap, longevity, and child mortality.
Research findings revealed marked outlook discrimination between poor and rich country. The economic condition depends upon the climatic condition and indirectly impact the decision making of family planning. But the demographic impact also a responsible factor for climatic changes.
In this research study researchers mainly focused on two stages of human life: childhood and adulthood. Researchers influences from their study that this is the high time for parents who need to divide limited resources between supporting current family consumption, having children, and paying for each child's education. This parental decision has a direct impact on children's future income.
The global warming affects agricultural and non-agricultural sectors in a different way. Climate change provides a large negative impact on agriculture and the financial condition of agriculture-dependent countries. This is one of the reasons for their poor condition.
However, it is true that agriculture requires less skilled labor. Therefore, the tendency of parents who belongs to agriculture field usually invests less amount of their income in child education.
Usually, they concentrate on increase fertility to get enough personnel in the future to agriculture the land. In reality, many people relocate due to the scarcity of agricultural goods, higher agricultural prices, and fewer wages. People live in richer countries have reduced fertility as they try to save resources and invest them in their children education. This inequality of fertility between higher latitudes and tropical countries occurs due to its impact of climatic changes on human life.