collect information about balance in an ecosystem
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The Earth hosts a vast network of ecosystems, from tiny tide pools to broad deserts to polar ice shelves. An ecosystem is defined as the habitat in which animals, plants, and microorganisms interact with non-living factors such as landscapes and temperature. Balanced ecosystems maintain a flow of materials and energy. In a balanced ecosystem, an interdependence of each factor exists. Any waste materials can be used by living animals, plants and other organisms.
Factors of Balanced Ecosystems
In a balanced ecosystem, the community of living (biotic) organisms interacts with non-living (abiotic) features in the environment. Abiotic features of ecosystems include precipitation, temperature, landscape, sunlight, soil or water chemistry, and moisture. The types of biotic factors in a balanced ecosystem include primary producers such as plants, primary consumers such as herbivores, secondary consumers such as carnivores, consumers such as omnivores that consume both plants and animals, and detritivores that eat decaying organic matter. Biotic factors rely upon abiotic factors to survive. Plants require certain temperature, moisture and soil chemistry to thrive. Animals rely on those plants for their food. Anything affecting any factor of an ecosystem can throw it off balance and force organisms to adapt or die off.
Energy and Material Cycling
A balanced ecosystem works via energy and material cycling. The chief energy source of ecosystems is sunlight. Photosynthesis of sunlight by plants creates oxygen as a waste product, which in turn is used in respiration by animals. Animals, in turn, create carbon dioxide as waste, and that is used by plants. The smallest organisms, microorganisms, decompose dead plants and animals into nonorganic material via enzymes. The conversion of the sun’s energy to chemical energy for photosynthesis or respiration results in energy loss as heat. Balanced ecosystems require the sun’s energy to exist and perpetuate the energy cycle.
Predators and Prey
Prey animals such as krill fuel the ecosystem in the oceans surrounding Antarctica. These tiny animals serve as grazers of phytoplankton, but also comprise the primary food source of many other animals, such as:
seals
penguins
whales
squid
fish
petrels
albatross
Krill is therefore considered a keystone species, essential to the survival of the Antarctic ecosystem balance. Without krill, the Antarctic ecosystem would lose its biodiversity. A rich diversity of species sustains a balanced ecosystem.