InHubbard Brook Experimental Forest, the largest “standing stock” ofenergy is represented by biomass of:a.living plant tissues.b.dead plant tissues.c.invertebrate herbivores.d.vertebrate herbivores.e.vertebrate carnivores.
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In
Hubbard Brook Experimental Forest, the largest “standing stock” of
energy is represented by biomass of:
a.
living plant tissues.
b.
dead plant tissues.
c.
invertebrate herbivores.
d.
vertebrate herbivores.
e.
vertebrate carnivores.
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Solved in 2 steps
- Are the below statements true or false (correct or wrong)? You have briefly to motivate your answer using graphs and/or arguments. a) A specific forest area is discovered to be an important habitat for a certain variety of snakes. Thus, the optimal timber rotation time should be extended. b) Assume a mine extracting both copper and silver. If the price of copper falls and the mine managers decides to increase the production of silver, silver then represents a socalled by-product. c) A rise in global demand for copper will shorten the reserve life of a given copper mining operation. d) If a farm grows two different crops and the price of one of the crops increases, the production mix will shift towards reduced production of the crop that has become more expensive.Thebest model for population growth of an annual plant like Phlox drummondii is:a.geometric growth.b.exponential growth.c.logistic growth.d.geometric growth during years with high rainfall and exponential growthduring years with low rainfall.e.geometric growth during years with high rainfall and logistic growthduring years with low rainfall.Netprimary productivity is the primary productivity of an ecosystem, aftersubtracting energy lost in:a.dead plant tissues.b.inedible plant tissues.c.respiration by primary producers.d.respiration by primary consumers.e.inefficiencies of photosynthesis.
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- EcosystemA hasprimary production of 1000 g C /m2/yr and ecological efficiency of 10%. Ecosystem B has primary production of 300 g C /m2/yr and an ecological efficiency of 25%. a.Which ecosystem will have more production at thesecondary consumer (carnivore) trophic level? b.Which ecosystem is more likely to support an endothermic primary consumer (herbivore)? c.If atrophic level requires at least 1 gC/m2/yr in order to exist, how many trophic levels can each of these ecosystems support?d.Given your answer to part c, which do you thinkhas a larger impact on the energy available at upper trophic levels: primary productivity or efficiency of energy movement across trophic levels?Describe TWO ways in which fire ant invasion would impact the ecology of a forest adjacent to the agricultural land. Things that you don't want to miss in your answer to get a high score: first describe the vegetation of forested vs agricultural land and make connections between pest invasion and effect on ecosystem services provide by the two. For instance, if pest chew leaf litter, what will be the consequence on the soil? What about competition with native species?Which of the following approaches would be the most effective way to reduce greenhouse carbon dioxide? a. Increase waste deposition into the deep ocean. b. Plant more environmentally-suitable plants. c. Increase use of fuel sources that do not produce carbon dioxide as a by-product. d. Decrease livestock agriculture.
- Himalayan blackberries are an invasive species of low shrubs that spreads rapidly, forming dense thickets that prevent other plants from germinating. The roots of blackberries do not prevent erosion which releases sediment into the stream. The shrubs do not provide enough shade to keep water cool for salmon The number of salmon returning to spawning grounds has been declining over the past several decades. a. Predict the effect of Himalayan blackberries population on the population of native trees. b. If an ecological project proposes the removal of blackberries along a streambank to restore the salmon run, how will the effectiveness of the project be monitored? Options: A. Native trees will decline. The number of salmon will be monitored before the removal of blackberries and every year after removal B. Native trees will decline. The number of salmon will be monitored immediately after the removal of blackberries and every year after removal . С. Native trees will increase. The number…According to the article, frugivores affect their food plants and the plants' communities by: (Choose one.) Group of answer choices a.increasing dispersal of plant pathogens, which changes the composition and abundance of plant communities. b.preying on seeds of plants, which decreases the survivorship of plants and pushes their populations to extinction. c. increasing dispersal and germination of the plants, which influences the composition and abundance of plants in communities. d. increasing pollination of plants, which increases the abundance of plant hybrids in their communities. article reference: The Role of Mycangial Fungi Associated with Ambrosia Beetles (Euwallacea interjectus) in Fig Wilt Disease: Dual Inoculation of Fusarium kuroshium and Ceratocystis ficicola Can Bring Fig Saplings to Early Symptom DevelopmentIdentify the following parameter that is not used to estimate a plant population by quadrat method. A. Mean number of individuals per unit area. B. Number of quadrats in which a species occurs. C. The distance between each species in a sampled area. D. Percentage of ground covered by a species within a sampled area.
