The sun supplies the energy needed by ecosystems. Plants absorb the energy and use photosynthesis to convert it to sugar. There are nutrients in the air, soil and water that keep the ecosystem growing and balanced.
A biome is a geographical location usually large in area with a certain types of animals and plants. One example of a biome is the desert. The desert is very dry. The only plants that can survive are drought resistant like cactus. The only animals that live in the desert must be able to survive with very little or no water like the kangaroo who gets all the moisture it needs from solid foods and the camel that stores water in its hump. Other examples of biomes are the tundra, where it is extremely cold with very little plant growth, and tropical rain forests where there is year round warmth and a lot of rainfall. These were some examples of land biomes. Aquatic is another form of a biome. Examples include marine, fresh water, and coral reef.
Humans have negatively affected many of the ecosystems and biomes in the world. Examples of the ways we as humans have changed the balance of nature throughout the world would be developing land, growing crops, cutting down trees, over hunting and over fishing and burning of fossil fuels. All of these examples have disturbed the balance of the ecosystem.
An ecological community consists of all the interactive species living within a certain area or a certain habitat. Most species have interacted over a long period of time. The interactions fall into categories including commensalism, competition, parasitism, predation, and mutualism.
Commensalism is when one species will