Tag: evs

In a typical forest food chain (e.g., grass -> deer -> lion), the lion acts as the secondary or tertiary consumer. In a standard three-step chain, it is the third trophic level (T3).

The trophic level is the sequential arrangement of several organisms on the basis of the number, energy flow, and biomass present at the different level. Food chains start at trophic level 1 with primary producers, such as plants, move to herbivores at level 2, predators at level 3 and finish with carnivores or apex predators at level 4 or 5. Thus, the correct answer is option D.

Vultures are scavenging birds that feed on dead animals. Vultures do not kill their own prey, they feed on dead animals. As scavengers, vultures play an important role in the ecosystem by decomposing the dead animal matter, cleaning the environment and reducing the spread of diseases.

• Ecosystems are said to be self-regulating or self-sustained in that each contains feedback mechanisms, which function to maintain the components of the system in one or other of its equilibrium states.
• An equilibrium state demonstrates the stability of ecosystems. Even in these stable states, the components of ecosystems are in dynamic exchanges, and these exchanges involve the build-up of energy or materials, which cycle the ecosystem either within a single equilibrium or between various equilibrium states. 
• It is the adaptive capacity of ecosystems, that have provided both the stability and the enormous range of diversity on earth.
• Food chains start at trophic level 1 with primary producers such as plants, moved to herbivores at level 2, predators at level 3 and finish with carnivores or apex predators at level 4 or 5.
  Thus, the correct answer is option D.

Trophic structure of an ecosystem is a type of producer-consumer arrangement, in which each food level is called as trophic level and the graphical representation of the trophic structure of ecosystem constitutes ecological pyramids. The green plants are producers and represent the first trophic level. So, bamboo plant is in the first trophic level.

Fishes occupy more than one trophic level because some feed only on phytoplanktons and zooplankton, while other feeds on algae or other food sources across various strata of the water body  

An omnivore is an organism, that regularly consumes a variety of material, including plants, animals, algae, and fungi. Human beings are omnivores. People eat plants, such as vegetables and fruits. Human beings eat animals, cooked as meat or used for products like milk or eggs. Human eats fungi, such as mushrooms. We also eat algae, in the form of edible seaweeds, such as nori, which are used to wrap sushi rolls, and sea lettuce, eaten in salads. Both omnivores and carnivores, meat eaters, are at the third trophic level. Carnivores and omnivores are secondary consumers.

• The trophic level of an organism is the position it occupies in a food chain. A food chain represents a succession of organisms that eat another organism and are, in turn, eaten by others. 
• Food chains start at trophic level 1 with primary producers such as plants, move to herbivores at level 2, predators at level 3 and finish with carnivores or apex predators at level 4 or 5.

• Herbivores are at the second level of the food chain and mainly eat plants. Herbivores are considered primary consumers and are the first consumers on the food chain. 
• The honey bee is a herbivore and therefore lives purely on the nutrients from plants. 
• Deer are also herbivores, they eat plants and grasses. So, they belong to the same trophic level.

The food chain is the series or linear link of different organisms through which the nutrients flow from one level to another. The trophic levels are denoted by the flow of energy from one level to the next level. The levels in any ecosystem is known by the organisms which are connected with each other by the transfer of energy.