To determine: Whether the data supports the hypothesis that bluefin tuna transported radioisotopes from Fukushima in their body.
Concept introduction: Bioaccumulation is the concentration of a pollutant inside an organism’s tissues causing the amount of the pollutants to increase over time. Trophic level also affects the pollutant concentration by the process of biological magnification. The concentration of the chemical increases in the ecosystem as the pollutants move up the food chain. Bioaccumulation and biological magnification even in low concentration of the pollutant (depending on toxic potential) can have detrimental effects on a species.
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- The process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called._______ dead zoning eutrophication retrofication depletionarrow_forward1) dissolved inorganic carbon such as bicarbonate, is plentiful in the surface ocean. a- In one sentence, what is the biological pump? b- What must happen for dissolved organic carbon to get exported to the deep ocean via the biological pump? Describe at least 2 stepsarrow_forwardThe chemical representation of algae is C106H263O110N16P. The Gulf of Mexico contains 0.2 mg/L of nitrogen and 0.08 mg/L of phosphorus. a.Which is the limiting nutrient for algal growth in the water? Assume all other nutrients are abundant. b.What will be the mass of algae produced per liter of water (mg/L) in an algal bloom? c.If the nitrogen source is reduced by 50%, would the algae production also decrease by half? d.If the phosphorus source is reduced by 50%, would the algae production also decrease by half?arrow_forward
- In what ways are Ca and Si cycling in oceanwaters similar, and in what ways do they differ?How do the calcium and silica cycles couple to thecarbon cycle?arrow_forwardDDT is a persistent environmental pollutant once widely used as an insecticide. Using solubility principles, explain why shore birds that populate areas sprayed with DDT are found to have a high concentration of DDT in their tissues.arrow_forwardIf decomposers usually grow faster and decompose material more quicklyin warmer ecosystems, why is decomposition in hot deserts relatively slow?arrow_forward
- uestion 23 Which of the following statements most accurately describes the transport of zebra mus- sels to the Great Lakes due to anthropogenic activity? The zebra mussel was unintentionally transported to the Great Lakes on ships' hulls and in their ballast tanks. The zebra mussel was intentionally transported to the Great Lakes to improve the ecosystem. The zebra mussel was intentionally transported to the Great Lakes due to its visual appeal. The zebra mussel was unintentionally transported to the Great Lakes on the cargo crates of ships.arrow_forwardAccording to the Berner Classification for aqueous environments, which of the following definitions describes the Postoxic stage? O a. Dissolved Oxygen 1mM of Sulfide Species O c. Dissolved Oxygen 0.5% of Saturation (~1 mM) Plants can assist in geochemical metal exploration, because: O a. they carry mineral grains to the surface O b. none of the other options O c. they produce gases that can be analysed between their roots O d. they transport dissolved metals to the surface through their rootsarrow_forwardDenitrification is which of the following? a. Organisms like algae, cyanobacteria and plants are capable of using light energy which is trapped by chlorophyll, to convert carbon dioxide and water into oxygen and glucose b. The first step in the synthesis of virtually all nitrogenous compounds c. The decomposers - certain soil bacteria and fungi e.g. ammonifying bacteria - break down proteins in dead organisms and animal wastes, releasing ammonium ions d. Nitrates are reduced to nitrogen gas by denitrifying bacteria e. Aerobic respiration requires oxygenarrow_forward
- Chemolithotrophs near hydrothermal vents support a variety of other life-forms there. Explain how their role is analogous to that of photosynthetic organisms in terrestrial environments.arrow_forwardFather's Genes Hemophilia is a sex-linked, recessive trait. Which of the following describes the probability of hemophilia in the offspring of a man who does not have hemophilia and a woman who is a heterozygous carrier? You may use a Punnett Square like the one below to find your answer There is a 0% chance that their daughters will have hemophilia O There is a 50% chance that their daughters will have hemophilia There is a 25% chance that their sons will have hemophilia There is a 100% chance that their sons will have hemophilia O o oarrow_forwardExplain the "phosphate trap" in the estuary of Chesapeake Bay. Why was a local ban on phosphorus in detergents not particularly helpful in mitigating eutrophication in the estuary?arrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax