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chsurveyppt
chsurveyppt

... Sec. 22.1 Terms Ecosystem—All the living and nonliving things that interact in a particular area Habitat—The place where an organism lives and that provides all the needs of that organism. Biotic Factors —The living parts of an ecosystem Abiotic Factors —the nonliving parts of an ecosystem ...
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u tigLe thai e - Mrs. Moore`s Advisory Page

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ecology study guide

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ecology study guide
ecology study guide

... Major Learnings1. All systems, regardless of scale, continually change, interact with one another and need organization to function. 2. Energy and matter exist in different forms. They are conserved, converted, or transferred throughout systems. 3. Models can be used to illustrate the properties of ...
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Interactions in the Ecosystem

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Unit 1: Biodiversity and Connectedness T Value 1.0

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Ecological Succession - Dearborn High School

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Capturing Energy From the Sun

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Change and the Environment Completed Notes

... A. Primary succession occurs in places where an ecosystem has never existed before. This could be a newly formed volcanic island or land exposed from a receding glacier. B. As the exposed rock is weathered, the first species appear. These species are called pioneer species. They are small, grow quic ...
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Ecosystem



An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and mineral soil), interacting as a system. These biotic and abiotic components are regarded as linked together through nutrient cycles and energy flows. As ecosystems are defined by the network of interactions among organisms, and between organisms and their environment, they can be of any size but usually encompass specific, limited spaces (although some scientists say that the entire planet is an ecosystem).Energy, water, nitrogen and soil minerals are other essential abiotic components of an ecosystem. The energy that flows through ecosystems is obtained primarily from the sun. It generally enters the system through photosynthesis, a process that also captures carbon from the atmosphere. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and other microbes.Ecosystems are controlled both by external and internal factors. External factors such as climate, the parent material which forms the soil and topography, control the overall structure of an ecosystem and the way things work within it, but are not themselves influenced by the ecosystem. Other external factors include time and potential biota. Ecosystems are dynamic entities—invariably, they are subject to periodic disturbances and are in the process of recovering from some past disturbance. Ecosystems in similar environments that are located in different parts of the world can have very different characteristics simply because they contain different species. The introduction of non-native species can cause substantial shifts in ecosystem function. Internal factors not only control ecosystem processes but are also controlled by them and are often subject to feedback loops. While the resource inputs are generally controlled by external processes like climate and parent material, the availability of these resources within the ecosystem is controlled by internal factors like decomposition, root competition or shading. Other internal factors include disturbance, succession and the types of species present. Although humans exist and operate within ecosystems, their cumulative effects are large enough to influence external factors like climate.Biodiversity affects ecosystem function, as do the processes of disturbance and succession. Ecosystems provide a variety of goods and services upon which people depend; the principles of ecosystem management suggest that rather than managing individual species, natural resources should be managed at the level of the ecosystem itself. Classifying ecosystems into ecologically homogeneous units is an important step towards effective ecosystem management, but there is no single, agreed-upon way to do this.
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