Define ecological efficiency, including ranges of ecological efficiencies in nature; and discuss the influence of enrichment of primary production on secondary production by primary consumers and predators.

Study Chapters 18 Primary and Secondary Production from textbook Ecology: Concepts & Applications (Manuel Molles, 2013), write a study journal that includes ALL answers & responses to following subjects: Review 18.1, pg. 393-395: Define gross primary production, net primary production, secondary production, and trophic level. Describe the relationship between evapotranspiration and net primary production in terrestrial ecosystems and provide the evidence showing that nutrient availability can limit primary production in terrestrial ecosystem. Review 18.2, pg. 396-398: Summarize the main factors limiting primary production in aquatic ecosystem; and outline the types of evidence used to demonstrate nutrient limitation of primary production in aquatic ecosystem. Review 18.5, pg. 405-409: Define ecological efficiency, including ranges of ecological efficiencies in nature; and discuss the influence of enrichment of primary production on secondary production by primary consumers and predators.