f98u1le2 - Keywords biosphere bioaccumulate biodiversity...

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Keywords : biosphere, bioaccumulate, biodiversity, food web, ecology, abiotic factors, and biotic factors. Lesson II: The Ocean Biosphere: From Microbes to Mammals Planet Earth is truly a water planet! We have a connection to all living things in the ocean, from the microscopic floating plants that supply us with the oxygen we breathe, to the huge blue whale that fills its belly with a ton of krill. This circle of life is called a biosphere. The earth’s biosphere is composed of all living things, from the deepest oceans to the upper atmosphere. It includes all the air, land and water where life exists. All living things depend upon and interact with each other and with the non-living things in their environment. The study of interactions between organisms and their environments is called ecology . Living things such as plants and animals in the environment are called biotic factors, or biota . Nonliving things in the environment, such as soil, water, temperature, light, salinity, chemical composition, and currents are abiotic factors. Together, these factors interact and function as an ecosystem . An ecosystem is a community of different organisms interacting with the abiotic parts of its environment. Ecosystems may be as small as a beehive, or as large as the Atlantic Ocean. With the aid of technology, we are discovering entire new ecosystems that survive in our biosphere. Our Ocean Biosphere Look at an atlas of the world and identify one of the major oceans found on planet earth. In short, the ocean itself is composed of the basin, water, and biotic and abiotic factors. The basin is composed of oceanic crust made at the mid-oceanic ridge. The water is supplied from rainfall and run off from the land. The biota in the ocean is all living plants and animals. A few abiotic factors are temperature, salinity, pressure, dissolved gases and depth. The components are not that easily summed up. We will not dive deeper into the formation of the oceanic basin, or the rain that fills the basin, but we will explore deeper into the biotic and abiotic factors found in the ocean.
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As said before, the biota are all living things in the ocean. The smallest organisms in the ocean belong to the same group that are the smallest on land, the viruses. They cause diseases in different organisms, and infect bacteria and phytoplankton. Viruses may play a role in the demise of phytoplankton blooms and keep bacterial populations under control. Researchers believe that viruses, by causing the cell of phytoplankton and bacteria to burst, are true recyclers of nutrients. Bacteria are found everywhere in the marine environment. They are larger than the viruses. Researchers now believe that they too utilize available nutrients found in , and are important for recycling nutrients for other organisms. Plankton include all of the organisms that drift passively in the ocean. They are divisible into phytoplankton , the plant plankton, and zooplankton, the animal plankton. Phytoplankton are the
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f98u1le2 - Keywords biosphere bioaccumulate biodiversity...

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