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All ecosystems depend on a continuous inflow
of high-quality energy in order to maintain their
structure and function of transferring matter
between the environment and organisms via
biogeochemical cycles.

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Positive and negative feedback loops can each play a role in food webs. When one species is
removed from or added to a specific food web, the rest of the food web can be affected.

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Biogeochemical cycles are essential for life and each cycle demonstrates the conservation of matter.

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A food web is a model of an interlocking pattern of food chains that depicts the flow of energy and nutrients in two or more food chains.

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In terrestrial and near-surface marine communities, energy flows from the sun to producers in the lowest trophic levels and then upward to higher trophic levels.

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The 10% rule explains how in the transfer of energy from one trophic level to the next, only about 10% of the energy is passed on.

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The loss of energy that occurs when energy moves from lower to higher trophic levels can be explained through the laws of thermodynamics.

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In a predator-prey relationship, the predator is an organism that eats another organism (the prey).

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Symbiosis is a close and long-term interaction between two species in an ecosystem. Types of symbiosis include mutualism, commensalism, and parasitism.

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Most of the reservoirs in which nitrogen compounds occur in the nitrogen cycle hold those compounds for relatively short periods of time.

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Major terrestrial biomes include taiga, temperate rainforests, temperate seasonal forests, tropical rainforests, shrubland, temperate grassland, savanna, desert, and tundra.

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Nitrogen fixation is the process in which atmospheric nitrogen is converted into a form of nitrogen (primarily ammonia) that is available for uptake by plants and that can be synthesized into plant tissue.

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A biome contains characteristic communities of plants and animals that result from, and are adapted to, its climate.

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Major carbon reservoirs include the atmosphere, ocean, lithosphere and biosphere storage. The largest reservoir for carbon is the ocean.

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1.C.3 Distribution of marine natural resources

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1.C.3 Distribution of marine natural resources

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The global distribution of nonmineral marine natural resources, such as different types of fish, varies because of some combination of salinity, depth, turbidity, nutrient availability, and temperature.

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The atmosphere is the major reservoir of nitrogen.

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Freshwater biomes include streams, rivers, ponds, and lakes. These freshwater biomes are a vital resources for drinking water.

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Discover the events that consistently deliver solid returns on investment. Learn how to maximize your profits and grow your business effectively.

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The hydrologic cycle, which is powered by the sun, is the movement of water in its various solid, liquid, and gaseous phases between sources and sinks.

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Primary productivity is the rate at which solar energy (sunlight) is converted into organic compounds via photosynthesis over a unit of time.

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The worldwide distribution of biomes is dynamic; the distribution has changed in the past and may again shift as a result of global climate changes.

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Carbon cycles between photosynthesis and cellular respiration in living things

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The oceans are the primary reservoir of water at the Earth’s surface, with ice caps and groundwater acting as much smaller reservoirs.

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Productivity is measured in units of energy per unit area per unit time (e.g., kcal/m2/yr).

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The carbon cycle is the movement of atoms and molecules containing the element carbon between sources and sinks.

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Plant and animal decomposition have led to the storage of carbon over millions of years. The burning of fossil fuels quickly moves that stored carbon into atmospheric carbon, in the form of carbon dioxide.

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The global distribution of non-mineral terrestrial natural resources, such as water and trees for lumber, varies because of some combination of climate, geography, latitude and altitude, nutrient availability, and soil.

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Gross primary productivity is the total rate of photosynthesis in a given area.

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The phosphorus cycle is the movement of phosphorus between sources and sinks.

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Phosphorous is naturally scarce in our environment due to the lack of return in the phosphorous cycle. Phosphorous can be a limiting factor in biological systems.

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Marine biomes include oceans, coral reefs, marshland, and estuaries. Algae in marine biomes supply a large portion of the Earth’s oxygen, and also take in carbon dioxide from the atmosphere.

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The major reservoirs of phosphorus in the phosphorus cycle are rock and sediments that contain phosphorus-bearing minerals (ie. phosphophyllite, turquoise, and vivianite).

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1.A.3 Resource Partitioning (Kayla Bates' Topic)

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1.A.3 Resource Partitioning (Kayla Bates' Topic)

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Competition can occur within or between species in an ecosystem where there are limited resources. Resource partitioning— using the resources in different ways, places, or at different times—can reduce the negative impact of competition on survival.

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Marine biomes include oceans, coral reefs, marshland, and estuaries. Algae in marine biomes supply a large portion of the Earth’s oxygen, and also take in carbon dioxide from the atmosphere

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The nitrogen cycle is the movement of atoms and molecules containing the element nitrogen between sources and sinks