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Ecosystems
Ecosystems

... Chemical cycling: Biogeochemical cycles. A combination of geological and chemical processes drives these. SPONCH, along with others such as iron, cobalt, sodium, chlorine. Elements taken up as molecules or ions. Plants take nitrogen as nitrates, while animals take it us from the bodies of their prey ...
Ecological Succession PP
Ecological Succession PP

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Biological Classification Levels Lesson PowerPoint

... • Habitat: the area or environment where an organism or ecological community normally lives or occurs. • An Ecosystem: a system formed by the interaction of a community of organisms with their physical environment. It includes many habitats and living and non-living things. • A Biome is a major regi ...
Ch 3: The Biosphere
Ch 3: The Biosphere

... Steps of the Carbon Cycle CO2 in the air is used by producers for photosynthesis. They become part of the producers in the form of sugar. 2A. Respiration – most organisms (plants, animals, etc) breathe in O2 created by producers. They breathe out CO2. 2B. Combustion – burning of fossil fuels increa ...
trophic level - Plain Local Schools
trophic level - Plain Local Schools

... B. Photosynthetic producers, like plants, change light energy to chemical energy (organic compounds). C. Consumers obtain chemical energy by feeding on producers or on other consumers. D. Decomposers break down wastes and dead organisms. ...
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Mentor_Test

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Ecology
Ecology

... An energy pyramid shows the amount of energy available at each level of a food chain. Only about 10% of energy is passed to next level. The rest is lost as heat. Producers- bottom level- have the most energy Primary consumers- eat producers Secondary consumers- eat primary consumers Tertiary consume ...
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Ecosystems - Science EOG

... In some cases, the species structure of an ecosystem is changed rapidly by a disturbance, such as a forest fire. If the ecosystem becomes unstable, primary or secondary succession can result. If succession begins in a new, unoccupied habitat where there is no soil present, it is called primary succ ...
Ecology
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Chapter 34 The Biosphere 34.1 The biosphere is the global

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...  Prefer to forage near cover than in open, but will choose sunflower seeds in open to standard feed in cover  When predator calls are played they prefer to feed on lower quality food near cover ...
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Types of Biodiversity
Types of Biodiversity

... Species diversity refers to the different types of living organisms on Earth. This includes the many types of birds, insects, plants, bacteria, fungi, mammals, and more. Many differing species often live together in communities depending on each other to provide their needs. A species can be defined ...
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... Environment – All the conditions, circumstances, and influences surrounding and affecting the development of an organism Exotic Species – plant or animal that does not naturally occur in a specific location or ecosystem Freshwater – Water that is not salty; water that contains less than 1,000 mg/L o ...
Ecology - Citrus College
Ecology - Citrus College

... • Community that remains essentially the same over long periods of time. • It is the final stage of ecological succession. ...
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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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