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Environmental conditions significantly affect species survival. Prolonged drought leads to water scarcity, while global warming alters rainfall patterns and raises sea levels, impacting ecosystems. The greenhouse effect, driven by human activities, exacerbates these problems. Habitat loss from deforestation and urbanization further threatens wildlife. Other factors like oil spills, water pollution, and natural disasters (e.g., floods) also play critical roles. Natural selection ensures that only species best adapted to these changing conditions will survive and thrive, passing their traits to future generations.
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Drought: • Lack of rainfall for a long period of time. Conditions are very dry.
Global Warming: • The warming of the earth caused by human activities. . • The Greenhouse Effect: Scientists are sure about the greenhouse effect. They know that greenhouse gases make the Earth warmer by trapping energy in the atmosphere. • A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans.
Loss of habitat: • Destruction of forest, rain forest decreases the amount of land for organisms to live. • Humans play a role in loss of habitat due to new homes and buildings and the need to use other resources in excess.
Other conditions that affect species • Oil spills • Water pollution • Red tide-over growth of algae that has toxins causes coughing and rash. • Floods • Smog • Acid rain • Soil erosion/infertile soil
Natural Selection: • Genetic Variation • Certain variations will help species survive in the environment
Survival of the fittest: • Some species are able to survive in certain environmental conditions than others. • Those individual species that survive are able to pass their genetic information on to their offspring. • This ensures (makes it possible) for survival of the species for future generations.
