Are higher macroinvertebrate indicators of less or more stream health? Do different invertebrate species have different tolerances to pollutants, thus can be used as an indicator of stream health?
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Are higher macroinvertebrate indicators of less or more stream health?
Do different invertebrate species have different tolerances to pollutants, thus can be used as an indicator of stream health?
does Aquatic vegetation has a greater influence on zooplankton or benthic macroinvertebraes
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- Which species is the stronger competitor for space in the intertidal zone? O Chthamalus BalanusA ghost shrimp is the dominant estuarine macroinvertebrate in the sediment along Amero-trailing coast. Describe the likely processes or activities of the ghost shrimp and how they help to maintain the health of the ecosystem.When one species is better at obtaining and holding space than another, it is competitively dominant. Based on the diagram which non-mobile (sessile) species is the dominant competitor in the intertidal? Which is second? Rank the six non-mobile species from (1) most to (6) least competitively dominant. Below are the competitive arrows from the slides (recall that sessile consumers are superior competitors over the algal species). gooseneck barnacle mussel acorn barnacle coral weed black pine Primary Producers nori seaweed 1= strongest competitor and 6= weakest competitor common coral weed [ Choose ] nori seaweed [ Choose ] black pine algae [ Choose ] mussels [ Choose ] acorn barnacles [ Choose ] gooseneck barnacles [ Choose ] > > > >
- This figure presents the results of an ecological study on the effects Use the passage to answer the question. of runoff from various fertilizers into coastal marine environments. Identify the most effective strategy for minimizing phytoplankton and eutrophication in this ecosystem based on the limiting nutrient(s). Phytoplankton density was measured at different collection sites enriched with nitrogen-based fertilizers (ammonium), phosphorus- based fertilizers (phosphate), and no fertilizers as the control group. A. use equal amounts of nitrogen and phosphorus-based fertilizers The purpose of the study was to determine the limiting nutrient for phytoplankton to minimize eutrophication in coastal marine B. reduce the amount of nitrogen-based fertilizers ecosystems. Results O C. increase the amount of phosphorus-based fertilizers 30 O Ammonlum enriched 24-O Phosphate enriched D. replace nitrogen-based fertilizers with phosphorus-based fertilizers I Unenriched 18- control 12 p- MacBook…Consider a trophiccascade with 4 levels: 1) predatory fish that consume planktivorous fish, 2) planktivorous fish that consume zooplankton,3) herbivorous zoplankton that consume phytoplankton, and 4) phytoplankton. True or False: A reduction in predatory fish will increase the level of phytoplankton. True FalseAt which trophic level would you expect to find the highest concentration of a biomagnifying toxin? O primary producer herbivore mesopredator top carnivore primary consumer
- What do you think are the multiple problems that aquatic environments are exposed to? What are the causes if these problems and where do they come from? List down at least three, which you think are major problems faced on aquatic environments. Explain briefly why you think these are major problems.Which of the following best describes bottom up control of an ecosystem? toxic compounds in mature leaves prevent herbivory by some consumers keystone predation of sea otters on sea urchins mesopredator consumption of small mammals parasitoids infesting a tomato hornwormThe following is NOT true about trophic levels Animals capable of feeding at many trophic levels will be able to survive if portions of their food supply are decreased or eliminated Secondary consumers belong to the third trophic level Primary consumers belong to the first trophic level Each stage through which energy travels is called a trophic level
- give some possible implications of the phenomenon shown in the table for the fishing industry and basin managementIncrease in concentration of the toxicant at successive trophic levels is known as what?Explain how streams can cleanse themselves ofoxygen-demanding wastes and how these cleansing processes can be overwhelmed. What is wastewater? Describe the state of stream pollution inmore-developed and less-developed countries.Give two reasons why lakes and reservoirs cannotcleanse themselves of pollutants very well. Define and distinguish between eutrophication and cultural eutrophication. List three ways to prevent orreduce cultural eutrophication. What are the majorsources of groundwater contamination in the UnitedStates? Explain why groundwater cannot cleanseitself very well. List three ways to prevent or cleanup groundwater contamination. List some ways topurify drinking water. Describe the purification ofdrinking water in more-developed and less-developedcountries. Describe environmental problems causedby the widespread use of bottled water. How are lawsused to protect drinking water in the United States?List three ways to strengthen the U.S. Safe DrinkingWater Act. Describe how…