This topic contains a solution. Click here to go to the answer

Author Question: Describe and compare submerged aquatic vegetation and phytoplankton. Where and how does each get ... (Read 19 times)

newyorker26

  • Hero Member
  • *****
  • Posts: 536
Describe and compare submerged aquatic vegetation and phytoplankton. Where and how does each get nutrients and light?
 
  What will be an ideal response?

Question 2

Give examples of the infrastructure that has been fashioned to manage water resources. What are the challenges related to developing countries?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jharrington11

  • Sr. Member
  • ****
  • Posts: 365
Answer to Question 1

Submerged aquatic vegetation (SAV) are benthic plants that grow under water. Benthic plants are (submerged and emergent) aquatic plants that grow attached to, or are rooted in, the bottom of a body of water. All common aquarium plants and sea grasses are benthic plants. To thrive, SAV requires water that is clear enough to allow sufficient light to penetrate to allow photosynthesis. As water become more turbid, light is diminished. In extreme situations, it may be reduced to penetrating to just a few centimeters beneath the water's surface. Thus, increasing turbidity decreases the depth at which SAV can survive. Another important feature of SAV is that it absorbs its required mineral nutrients from the bottom sediments through the roots, just as land plants do. SAV is not limited by water that is low in nutrients. Indeed, enrichment of the water with nutrients is counterproductive for SAV, because it stimulates the growth of phytoplankton.
Phytoplankton consists of numerous species of photosynthetic algae, protists, and chlorophyll-containing bacteria that grow as microscopic single cells or in small groups, or threads,' of cells. Phytoplankton lives suspended in water, and are found wherever light and nutrients are available. In extreme situations, water may become literally pea-soup green (or tea-colored, depending on the species involved), and a scum of phytoplankton may float on the surface and absorb essentially all the light. However, phytoplankton reaches such densities only in nutrient-rich water, because, not being connected to the bottom, it must absorb its nutrients from water. A low level of nutrients in water limits the growth of phytoplankton accordingly.

Answer to Question 2

The infrastructure includes dams, reservoirs, aqueducts, canals, intake and outflow pipes, water and sewage treatment plants, water storage facilities, and the piping from and to homes and businesses. All of these industrialized techniques cost money and cause displacement and ecological damage, which can be difficult to absorb in developing countries.




newyorker26

  • Member
  • Posts: 536
Reply 2 on: Jul 15, 2018
:D TYSM


Alyson.hiatt@yahoo.com

  • Member
  • Posts: 354
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

For a complete list of videos, visit our video library