Question

What factors in environment could increase on algae but decrease other

Answer 1

Step-by-step explanation:

Algae barely grow at all in clean wild water courses as there are insufficient nutrients for them to grow to any significant extend.

When a watercours is polluted, especially with run off from farmland and agriculture that run off will contain significant amounts of soluble nitrogen, phosphate and potassium. These are the key nutrients needed by algae so they grow. If it is bad they can be seen either as haze or as green slime on the surface, under the surface or attached to rocks etc.

Therefore the growth of algae in an othewise clean water course is indication that it has been polluted, probably, but not necessarily with agricultural run off.

Answer 2

Answer:

There are many factors in the environment that can have different effects on different types of algae. Some factors that may increase the growth of one type of algae but decrease the growth of another include:

Nutrient availability: Some types of algae thrive in environments with high nutrient concentrations, such as nitrogen and phosphorus. However, other types of algae may be more sensitive to changes in nutrient levels, and may actually experience decreased growth or even die off if nutrient levels are too high or too low.
Light availability: Most types of algae require sunlight to grow and photosynthesize. However, different types of algae may have different light requirements or tolerances, and may grow more or less quickly depending on the amount and quality of light available.
Temperature: Algae are sensitive to changes in temperature, and different types of algae have different optimal temperature ranges for growth. Some algae may grow more quickly at higher temperatures, while others may be more sensitive to temperature changes and may experience reduced growth or die off.
pH: The pH of the environment can also have an impact on algae growth. Some types of algae may be able to tolerate a wide range of pH levels, while others may be more sensitive to changes in pH and may experience reduced growth or die off.
Predation: Algae can be consumed by other organisms such as zooplankton or fish. Therefore, the presence or absence of predators can have a significant impact on the growth and survival of different types of algae.
Overall, the effects of environmental factors on algae growth can be complex and depend on a variety of factors, including the specific type of algae, the characteristics of the environment, and the presence or absence of other organisms.