Why is a food web a more accurate representation of the feeding relationships in an ecosystem than a food chain? A food web shows many different kinds of species and their individual webs, while a food chain shows only the chain of one dominant carnivore. A trophic level is each step in a food chain or food web.

Food chains are linear aspects of food webs that describe the succession of organisms consuming one another at defined trophic levels. Food webs are a more accurate representation of the structure and dynamics of an ecosystem. Food chains are easier to model and use for experimental studies.

Types of Food Chains found in an Ecosystems: Grazing and Detritus Food Chain

• Grazing food chain: This type of food chain starts from the living green plants goes to grazing herbivores, and on to carnivores.
• Detritus food chain: ADVERTISEMENTS:

An apex predator, also known as an alpha predator or top predator, is a predator at the top of a food chain, without natural predators. Apex predators are usually defined in terms of trophic dynamics, meaning that they occupy the highest trophic levels.

The arrows point to the consumer that eats that organism. List three heterotrophs shown in Figure 13.3. Which trophic level shown in the diagram has the most available energy?

Arrows are universally recognised for indicating directions. They are widely used on signage and for wayfinding, and are often used in road surface markings. Upwards pointing arrows are often used to indicate an increase in a numerical value, and downwards pointing arrows indicate a decrease.

The double sided arrows pointing both ways means both ways Implication. For example A <-> B means “A implies B” AND “B implies A”

Cool air is sinking. This image is a sample of the convection of the air by temperature, that is to say that when the air has a hot temperature, the air tends to rise, while when the air has a cold temperature, it tends to decrease. Therefore, the arrows in the circle indicate that Cool air is sinking.

The dead and decaying matter forms fossil fuels overtime which is used in industries. These industries emit CO₂ once fuel is burnt. Thus, the circled arrows are representing how CO₂ is released back to atmosphere.

How is cold front formation different from stationary front formation? Cold fronts form when a warm air mass moves over a cold air mass, while stationary air fronts form when a cold air mass moves over a warm air mass.

Answer: The symbol indicated high pressure.

The correct answer is – Plants use oxygen and release carbon dioxide into the atmosphere. The plants have multiple process going on when it comes to their growth and development, and one of those processes is the respiration.

Biosphere-Atmosphere Interactions focuses on the sources and sinks of greenhouse gases (GHGs), air pollutants, particulate matter, water, and energy between the Earth’s surface and the atmosphere.

Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas. The oceans, and other bodies of water, absorb some carbon from the atmosphere.

In preindustrial times the major reservoirs of carbon were the deep and shallow portions of the ocean; the soil, detritus, and biota of the land; and the atmosphere. The oceans were, and still are, the greatest reservoirs of carbon.

Not all dead organisms are acted on by decomposers. Instead of being immediately recycled, the carbon from some organisms is kept in a type of long-term storage, or carbon sink. How do humans use the materials in the carbon sink? We burn them as energy sources.

Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas. This is because natural sinks remove around the same quantity of carbon dioxide from the atmosphere than are produced by natural sources.