Herbivores eat plants, algae, and other producers. They are at the second trophic level. In a grassland ecosystem, deer, mice, and even elephants are herbivores. They eat grasses, shrubs, and trees. In a desert ecosystem, a mouse that eats seeds and fruits is a primary consumer.
Physical capital is fixed capital, any kind of real physical asset that is not used up in the production of a product. Usually the value of land is not included in physical capital as it is not a reproducible product of human activity.n economic theory, physical capital is one of the three primary factors of production, also known as inputs in the production function. The others are natural resources (including land), and labor â the stock of competences embodied in the labor force.
In economics, physical productivity is defined as the quantity of output produced by one unit of input within one unit of time. The standard calculation for economic productivity involves dividing output value per unit of input (e.g., 5 tons per hour). An increase in physical productivity causes a corresponding increase in the value of labor, which raises wages. This is why having an education or on-the-job training is sought after by employers; it increases the productivity of the workers and makes them more valuable assets for the firm.