Qs

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 ] > > > >

What causes red tide? How does red tide impact you? Red tides occur every year, but some years are worse than others. What factors do you think would contribute to a particularly bad year for red tide?

destion 6 Which statement describes the most likely outcome for the owl and toad populations in an environment in which skyglow and glare become factors? A. Skyglow causes the owl population to experience a decrease in hunting success; glare causes the toad population to experience a decrease in mating success. B Skyglow causes the owl population to experience a decrease in hunting success: glare causes the toad population to experience an increase in mating success. C. Skyglow causes the owl population to experience an increase in hunting success; glare causes the toad population to experience an increase in mating success. D. Skyglow causes the owl population to experience an increase in hunting success; glare causes the toad population to experience a decrease in mating success.

The figure above shows main abiotic and biotic factors influencing the physiology and behavior of fish larvae in estuaries. The more important the factors are for the larvae, the thicker the lines. Suppose changes from question 1 take place. Draw a new figure and redefine the thickness of the lines and new factor interactions.    This is from question 1 :  A proposal is made to deepen the entrance and main channel of an estuary. What do you suppose will happen to the salt marshes that surround the channel? What do you predict will happen to the productivity of the estuary? Deeper channels would probably change the mixing of the fresh and saltwater and lead to increased salinity and changes in the salt wedges in the channel. This would probably negatively impact the plants on the edges of the channel, as they would have to deal with higher salt levels than they are adapted to. The strain that would be put on the plants (like cordgrasses) in the marshes, would most likely lead to a…

Based on the text on roaches mating: 1. Identify abiotic factors that support the survival and reproduction of the pest. 2. Identify biotic factors that support the survival and reproduction of the pest. 3. Predict what factors in the environment can be altered to decrease the survival and reproduction of the pest.

What is a benefit of uniform dispersion?         decreased competition         increased resources         easier reproduction         increased competition

Why would anadromous salmon be considered good indicators of both marine and terrestrial ecosystem health?A. they require both clean fresh and marine aquatic biomes to liveB. they feed on and help feed many other organisms. C. they supply entire watersheds with nutrients D. all of the above (A-C)

Which species is the stronger competitor for space in the intertidal zone? O Chthamalus Balanus

8 Analyze if the following pairs of statements are correct.   Choose: A, if both statements are correct; B, if only the first statement is correct;  C, if only the second statement is correct; or D, if both statements are incorrect.     2a. Population density refers to the number of individuals within a  designated area.   2b. Richness pertains to the number of species present in a specific  location.

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Patterns of dispersion can depend on scale. How might the penguin dispersion look from an airplaneflying over the ocean?

33. During the hydrologic cycle, which of the following reservoirs has an intermediate residence time (or flux rate), but represents about 97.2% of the total amount of water on Earth? A. surface water (in oceans, rivers, and lakes) B. ice and snow (in the glaciers and polar icecaps) C. water in deep rocks (geologic water) D. atmospheric water (water vapor in the air) E. groundwater (in soils)

15.In each station’s tide chart in Figure 2, water levels are plotted on the vertical axis with time in hours plotted along the horizontal axis. The smooth blue curve represents the predicted tide based on combined partial tides. The green residual curve is the actual observed tide. The first labeled time indicated on these graphs is 00:00 (midnight) local time for the day _________ November 2018.a.26b.27c.28d.29

Answer the following questions: 1.) How does wind, evaporation and tide in fluence the distribution of salinity in the estuary? 2.) Why is it a problem to the animals lacking siphons to live in the sediment? List two problems.

Which of the following groups would be the most likely to exhibit uniform dispersion? a red squirrels, who actively defend territories b cattails, which grow primarily at edges of lakes and streams c dwarf mistletoes, which only live on a particular species of forest tree d moths, in a city at night e lake trout, which seek out cold, deep water high in dissolved oxygen

Study these two figures? Which graph represents Semibalanus? (d) When competition is asymmetric and niches do not overlap completely, weaker competitors use nonoverlapping resources. Chthamalus in Species 1 (strong competitor) (weak competitor) upper intertidal zone Species 2 fig 53.5 Fundamental Mean tide level niche Realized Semibalanus in lower intertidal zone niche O Pon Beran Cuminga Ar erve Niche (range of resources used) Copyright e 2008 Pearson Benjamin Cumnings. Alrights reserved. A. purple graph (left) B. green graph (right) A. purple graph (left) B. green graph (right) Number of individuals using resource

x Read the abstract from the scientific journal article: Helfield, JM and RJ Naiman. 2001. Effects of salmon-derived nitrogen on riparian forest growth and implications for stream productivity. Ecology 82 no. 9: 2403-2409. From this Abstract section, select all below that correctly identify conclusions of this paper. Growth rates are significantly increased in Sitka spruce near spawning streams. Trees and shrubs near spawning streams derive ~34-43% of their foliar nitrogen (N) from spawning salmon. Trees and shrubs near spawning streams derive ~22-24% of their foliar nitrogen (N) from spawning salmon. Riparian forests affect the quality of instream habitat through shading, sediment and nutrient filtration. Riparian forests affect the quality of instream habitat by producing woody debris, a fertilization process that enhanced streambank production but also serves to improve streams for spawning and rearing of young salmon. Growth rates of Sitka spruce near spawning streams were no…

85.  An ecologist collects three related beetle species – one from a tropical rain forest, another from a desert and the third from the tundra. Back in the lab, she places all the beetles in a warm, dry environmental chamber and measures water loss across the cuticle. From highest to lowest rate of water loss, how would you expect the three species to rank?a. tropical rain forest > desert > tundrab. desert > tundra > tropical rain forestc. tundra > desert > tropical rain forestd. desert > tropical rain forest > tundrae. tropical rain forest > tundra > desert

85. An ecologist collects three related beetle species – one from a tropical rain forest, another from a desert and the third from the tundra. Back in the lab, she places all the beetles in a warm, dry environmental chamber and measures water loss across the cuticle. From highest to lowest rate of water loss, how would you expect the three species to rank? a. tropical rain forest > desert > tundra b. desert > tundra > tropical rain forest c. tundra > desert > tropical rain forest d. desert > tropical rain forest > tundra e. tropical rain forest > tundra > desert 86. What do you think would happen to a cell if minor DNA damage occurred that caused the cell to "pause" at a checkpoint during the cell cycle, and then the DNA damage could not be fixed? a. The cell would stay paused at that stage of the cell cycle indefinitely. b. This would not occur, since once initiated progression through the cell cycle cannot be stopped c. A macrophage will sense the problem and kill the cell. d. The…

How does the Coriolis “Force” affect ocean productivity? How does it affect the world’s major fisheries?

The area of the ocean that produces the largest standing stock of commercial fish is in the Select one: O a. upwelling areas O b. tropical area c. bathypelagic zone d. coastal areas e. mesopelagic zone X O O O

4. Use the graph to the right to answer the following questions.

5. Which organisms do leopard seals eat? 6. Which organisms eat krill? 7. What producer(s) can be found in the food web? 8. List one important type of organism missing from this food web: 9. If there was a large oil spill which blocked most of the sunlight, decreasing the amount of algae available, how would each of the following populations be affected? 10. Use the food web to identify organisms using the following table so that the killer whale is the quaternary (fourth) consumer. 1. Primary consumer 2. Secondary consumer 3. Tertiary consumer 4. Quaternary consumer Created by counting organisms at each level First level carnivores Herbivores Marine Plankton Population How it Will Be Affected: Cod Leopard seal Killer whale Created by weighing organisms at each level First level carnivores Marine Plankton © 2011 Vanema mn Herbivores Killer whale Created by measuring calories at each level First level carnivores Marine Plankton Herbivores A B с View the three pyramids above. Identify…

Two species of sea urchins live practically side by side on sandy bot-toms. The two species appear to have the same diet: drift seaweeds and other bits of organic matter. They are able to live in the same environ• ment with minimal competition. How might they be able to share their habitat and food resources?

Gause’sexperiments with Paramecium and Didinium showed:a.extinction of the predator, followed by extinction of the prey, in allhabitats.b.coexistence of predator and prey at fairly constant population sizes, inall habitats.c.coexistence of predator and prey, but with oscillating population sizes,in all habitats.d.coexistence of predator and prey at fairly constant population sizes,but only in the presence of refuges and predator reservoirs.e.coexistence of predator and prey with oscillating population sizes, butonly in the presence of refuges and predator reservoirs.

The balance of the coral reef ecosystem is being affected by warming oceans, changing ocean currents, and what other external factor? A: The acidification of the oceans B: The light that enters the system C: Marine animals leaving the reef D: Not enough information is given

The following table gives the total amounts of water and salt in the oceans and the total influx of water and salt from rivers each year. Use this information to calculate the residence time in the world ocean of both water and salt.

Explain Paine's (1966) starfish (pisaster) in rocky interdial zones of the us

Which statement best describe a trophic level?    Question 2 options:   A way to classify organisms based on their feeding behavior    Organisms with dissimilar feeding behavior    A diagram to sort organisms based on being meat or vegetable eating     A triangular diagram organizing flora and fauna

Most marine biologists hypothesize that space, not food, limits populations in the rocky intertidal. What kind of experiments could be performed to test this hypothesis?