Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 44, Problem 11RQ
A key feature of estuaries is:
- low light conditions and high productivity
- salt water and fresh water
- frequent algal blooms
- little or no vegetation
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Which of the following statements about estuaries is NOT true?
An estuary is a transition area between river and sea
Salinity varies spatially and with the rise and fall of the tides
Estuaries are simple ecosystems
Estuaries are nutrient-rich and highly productive
A lake with low nutrient levels and very clear water is called
eutrophic
oligotrophic
a dead zone
a septic zone
oxygen depleted
Why are estuaries irreplaceable?
Chapter 44 Solutions
Biology 2e
Ch. 44 - Figure 44.10 How might turnover in tropical lakes...Ch. 44 - Figure 44.12 Which of the following statements...Ch. 44 - Figure 44.21 In which of the following regions...Ch. 44 - Which of the following is a biotic factor? wind...Ch. 44 - The study of nutrient cycling though the...Ch. 44 - Understory plants in a temperate forest have...Ch. 44 - An ecologist hiking up a mountain may notice...Ch. 44 - Which of the following biomes is characterized by...Ch. 44 - Which of the following biomes is characterized by...Ch. 44 - Where would you expect to find the most...
Ch. 44 - A key feature of estuaries is: low light...Ch. 44 - Which of the following is an example of a weather...Ch. 44 - Which of the following natural forces is...Ch. 44 - Ecologists often collaborate with other...Ch. 44 - The population is an important unit in ecology as...Ch. 44 - Compare and contrast ocean upwelling and spring...Ch. 44 - Many endemic species are found in areas that are...Ch. 44 - The extremely low precipitation of subtropical...Ch. 44 - In what ways are the subtropical desert and the...Ch. 44 - Scientists have discovered the bodies of humans...Ch. 44 - Describe the conditions and challenges facing...Ch. 44 - Compare and contrast how natural- and human...Ch. 44 - Predict possible consequences if carbon emissions...
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- Entangles fish, marine mammals, and sea birds, preventing them from feeding or causing them to drown. Dead zones: algal blooms consume oxygen, kills shellfish and displaces fish. Poisonous algae and countless plants and animals have invaded harbor waters and disrupted the local ecological balance. Destruction of coral reefs. Of the seventeen major world fisheries, four are depleted and the other thirteen are either fished to capacity or over-fished. Commercial marine fisheries. Nitrogen and phosphorus from sources such as fertilizer, sewage and detergents, enter coastal waters. Invasive species, such as zebra mussels. Cruise ships and tourists. Ghost nets: lost or discarded fishing nets keep on fishing.arrow_forwardTo reduce the risk of flooding, it is important to constructing dams and levees remove coastal wetlands protect vegetation encourage irrigation encourage developmentarrow_forwardWetlands, estuaries, mangrove swamps, and coral reefs are examples of coastal areas ocean habitats groundwater reservoirs deltaic deposits. pelagic zonesarrow_forward
- Which of the following statements about Ocean pollution is FALSE? Group of answer choices -by far, the biggest problem is pollution from oil spills from ships out at sea -coastal "dead zones" with highly-depleted oxygen can be associated excess nitrogen and phosphorus runoff -an estimated 80% of marine pollution originates on land -nearly 40% of the world’s population lives on or near the coastarrow_forwardWhich is an unseen factor that affects the carrying capacity of the ocean? sunlight space water availability water chemistryarrow_forwardWhich 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 hornwormarrow_forward
- 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…arrow_forwardThe process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called _________. a. dead zoning b. eutrophication c. retrophication d. depletionarrow_forwardWhich of the following factors are important in distinguishing between different aquatic biomes? Salinity of the water Water temperature Availability of nutrients Water deptharrow_forward
- Explain the ecological and economic importance of estuaries and harmful algal bloomsarrow_forwardThis trophic level creates biomass from abiotic sources quaternary consumer primary consumer primary producer tertiary consumerarrow_forwardGlobal climate change is predicted to cause increased water temperatures. Explain how an increase in temperature might affect this community. refer to picturearrow_forward
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