Bio 1105 Chapter 5 Notes[1]

Bio 1105 Chapter 5 - Bio 1105 Chapter 5 Notes Interactions Environments and organisms Ecology is the study of the ways organisms interact with each

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Bio 1105 Chapter 5 Notes Interactions: Environments and organisms Ecology: is the study of the ways organisms interact with each other and with their non living surroundings. Ecology deals with the ways in which organisms are adapted to their surroundings. These interactions involves energy and matter. Living things require a constant flow of energy and matter to assure their survival. IF the flow of energy and matter ceases the organisms die Environment : Everything that affects an organism during its lifetime is collectively known as its environment. There are two subdivisions in environment. 1. Abiotic environment : are nonliving things that influence an organism. Ex: energy, matter, space, ecological processes. Energy is required by all organisms. The ultimate source of energy for almost all organisms is the sun. In the case of plants the sun directly supplies the energy necessary for them to maintain themselves. Animals obtain their energy by eating plants and other animals that eat plants. Matter: in the form of atoms such as carbon, nitrogen, and phosphorus, and molecules such as water that provides the structural framework of organisms. Organisms constantly obtain these materials from their environment. The atoms become the part of an organism’s body structure for a short period of time and eventually, everything goes back to the environment through respiration, excretion, death and decay Space : organisms inhabit has a particular structure and location that is also an important abiotic aspect of their life. Some live in the ocean and others live on land at sea level; still others live on mountaintops or fly through the air. Some are close to the equator and others are near the poles. Ecological Processes involve interactions between matter and energy. The climate of an area involves energy in the form of solar radiation interacting with the matter that makes up the earth. The intensity and duration of sunlight in an area cause daily and seasonal changes in temperature. Differences in the temperature generate wind. Solar radiation is also responsible for generating ocean currents and the evaporation of water into the atmosphere that subsequently falls as precipitation.
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Depending on the climate precipitation is of different forms: rain, snow, hail, or fog. These factors interact to produce soils that range from sandy, dry, and infertile to fertile and moist with fine particles. BIOTIC FACTORS: The biotic factors of an organism’s environment include all forms of life with which it interacts. Plants that carry photosynthesis; animals that eat other organisms; bacteria and fungi that cause decay; bacteria, viruses, and other parasitic organisms that cause disease; and other individuals of the same species. LIMITING FACTORS:
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This note was uploaded on 06/28/2011 for the course BIOL 1101 taught by Professor Staff during the Fall '10 term at Kennesaw.

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Bio 1105 Chapter 5 - Bio 1105 Chapter 5 Notes Interactions Environments and organisms Ecology is the study of the ways organisms interact with each

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