In a seagrass ecosystem, nutrients limit primary production under low nutrient (oligotrophic) condition, while light becomes the limiting factor under high nutrient (eutrophic) condition. Discuss how this happens with respect to the three primary producers (seagrass, macroalgae, phytoplankton) as the condition changes from oligotrophic to eutrophic.

Nitrogen is available to terrestrial plants in the form of Select all that apply. Select one or more: a. nitrite ions in the soil b. nitrate ions in the soil c. animal carcasses d. N2 in the atmosphere e. ammonium ions in the soil

It is June in Fresno and the officials at the water district have just reduced your irrigation ration by 26%. In the field, you determine that the water potential in your soil is -1.68 MPa while the water potential of your crop is -1.62 MPa. Question A. Is your crop able to take up water from the soil? Explain. Question B. It is now late August and your soil water potential is -2.10 MPa, fortunately, you have been granted one magic wish in altering the physiology of your crop to increase its ability to take up water, however, you must choose from one of the options below. Fill in the values denoted by the ? as needed, and select the option that will cause the greatest water uptake by your crop. Option Vs (MPa) Vp (MPa) Vw (MPa) -1.90 0.00 -2.59 +0.13 -2.4 -2.09 -2.05 -2.28 +0.17 4.

1.) Describe a food chain that has at least four different trophic levels. Label the tropic level (Producer, Primary consumer, Secondary Consumer, or Tertiary Consumer), whether the organism is a(n) autotroph or heterotroph, and provide an example of an organism at each tropic level.   2.)Name two biological processes involved in rapid carbon exchange:   3.)Name two geologic processes involved in long-term carbon exchange:

Can you describe the nitrogen and phosphorous cycles in terms of nutrient availability please?

AP Environmental Science Primary Productivity Problems   Net Primary Productivity efficiency can be calculated for terrestrial producers when values for insolation energy, respiration loss and gross productivity are known. Use the equations below to answer the following problems:   Net Primary Productivity = Gross Productivity – Respiration Loss   Efficiency = .          NPP           . X 100                      Insolation Energy   In a rice paddy in Southeast Asia, the insolation energy is 6,000,000 calories/m2/day. The gross productivity of the rice is 0.012 grams/cm2/day, and the respiration loss is 20 percent. One gram of rice is equivalent to 1000 calories.   Calculate the net primary productivity of the rice.               Find the efficiency of photosynthesis by the rice.   Could you mostly help me set it up and find it? So I can learn how to do it.

All of the following are reasons why tropical rain forests less likely to grow back as secondary growth forests after widespread deforestation (when compared to temperate forests) EXCEPT: Question 25 options: - All of the above are significant reasons why tropical rain forests may not grow back after widespread deforestation. The soil of tropical rain forests contains much less organic matter and nutrients compared to the soil of temperate forests. - The trees in tropical rain forests are largely responsible for returning water vapor back to the atmosphere through evapotranspiration, so when they are gone, the rains come less frequently. - A larger percentage of the nutrients in a tropical rain forest system are stored in the trees themselves than in temperate forests. - Almost all tropical rain forest species are wind-pollinated, which is less reliable than insect-pollination so tree reproduction is affected more by “chance.”

What is the difference between a nutrient pool and a cycling pool in the processes of matter flows in ecosystems?

what organism would be most affected  by a blightr that eliminates all plant material from an ecosystem? a. hetertrophic marine decomposers  b.  hetertrophic soil decomposers  c. chemolithoautotrophs  d. oxygenic microbial phototreophs  e.anoxygenic microbial phototreophs

Scenario 5: While walking in a park, you see lush growth of a certain plant in some areas, but very poor growth of the same plant in other areas. The amount of sunlight and moisture between these areas seems the same, but you find that the amount of nitrogen is less in the soil where the plants aren't doing well. You believe that the nitrogen level in the soil is causing a difference in the growth of these plants. Prompt Response What question might you ask? What is your hypothesis? togyri What is your prediction? Ineon sbr 1ucy What are your independent and dependent variables? bns yilsmsmnagxs ucy bluow wor How would you experimentally test your hypothesis? Be sure to identify your control and treatment groups. 11037u6ur Bon