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 48 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
Thanks for the timely response, appreciate it


dreamfighter72

  • Member
  • Posts: 355
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

For a complete list of videos, visit our video library