Ecosystem

Every organism in an ecosystem is affected by the other organisms in the community it lives in. create a sample community and complete all of the following points about your community. a) define "trophic levels". Provide a specific example of four species and describe their trophic-level relationships. b) trace energy flow through your sample community. c) trace contaminant flow (for example, DDT) through your sample community

Ecosystems

Describe the basic components of an ecosystem.

Regulation of population growth

Examine ecology in terms of population growth and human activities on the environment a. Examine the dynamics of population growth on the environment. b. Explain the concept of regulation of population growth through community interactions. c. Evaluate the effects of human activities on ecosystems and the biosphere.

soil science question

You dig a hole and put the soil in a large pail. The hole measures 12x13 inches wide and 10 inches deep. The soil in the pail weighs 80 pounds. What was the bulk density of the soil in g/cm^3 ?

Ecology problems: decomposition and anticipated mass loss curves, definition of efficiency, photosynthesis

I need answers to only questions given below. Need explanation. PROBLEMS 1-A,B,C This problem is about a litter decomposition study. Draw the mass loss curves. Which litter decomposes more rapidly? What proportion would remain after 12 months? PROBLEM 5 True or false: the efficiency in which a secondary consumer ingests energy is defined as the amount of energy assimilated per unit energy available. PROBLEM 14-B,C The table shows the average photosynthetically active radiation (PAR). What is the total net photosynthesis? Can you estimate the NPP?