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.
There are five types of sustainable capital from where we derive the goods and services we need to improve the quality of our lives. There are five types of sustainable capital from where we derive the goods and services we need to improve the quality of our lives. Tags: Metrics.  Natural Capital is any stock or flow of energy and material that produces goods and services. It includes: Resources - renewable and non-renewable materials.