What are the factors that affect primary productivity?
Factors influencing the primary productivity are: –Temperature: It controls the enzyme-mediated dark reaction rate of photosynthesis. -Availability of nutrients and photosynthetic capacity of plants also influence the rate of primary productivity. -Species succession is also a regulating factor.
How do you determine primary productivity of an ecosystem?
Primary productivity is usually determined by measuring the uptake of carbon dioxide or the output of oxygen. Production rates are usually expressed as grams of organic carbon per unit area per unit time.
What are the two major factors in determining primary productivity?
We focus on two major variables—light and nutrients—and their role in determining primary production.
What are the two most important factors in determining the rate of primary productivity in an aquatic ecosystem?
In aquatic ecosystems, primary productivity is driven by the availability of nutrients and light and, to a lesser extent, by temperature and other factors.
What are three factors that affect the primary productivity of an ecosystem?
Net primary productivity varies among ecosystems and depends on many factors. These include solar energy input, temperature and moisture levels, carbon dioxide levels, nutrient availability, and community interactions (e.g., grazing by herbivores) 2.
What is primary productivity give brief description of factors that affect primary productivity?
Primary productivity refers to the total organic matter produced by primary producers per unit area per unit time. It is affected by nutrient availability, types and number of primary producers present in an ecosystem, temperature, sunlight, water, precipitation etc.
What factors limit primary production in terrestrial ecosystems?
In terrestrial ecosystems, temperature and moisture are the key factors limiting primary production. Tropical rain forests, with their warm, wet conditions, are the most productive of all terrestrial ecosystems. By contrast, low-productivity ecosystems are generally dry (deserts) or dry and cold (arctic tundra).
Which of the following factors play a role in primary productivity?
Primary productivity depends upon plant species of the area, their photosynthetic capacity, availability of nutrients, soloar radiations, precipitiation, soil type and a number of other environmental factors.
Why is primary productivity measured?
Since primary productivity makes up the bottom-most trophic level, it provides essential nutrients and energy to higher trophic levels and higher organisms.
What factors affect primary productivity in the ocean?
Primary production in this coastal ecosystem is strongly influenced by nutrient supply from the adjacent shelf via surface water mass intrusions or upwelling of nutrient-rich deep waters. This oceanic component of nutrient supply is primarily characterized by nitrogen limiting conditions for phytoplankton growth.
What is primary productivity quizlet?
Primary productivity is the rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances. total amount of productivity in a region or system is. net primary production (NPP) -the amount of energy that is actually stored in the plant after respiration processes.
What factors determine the productivity of a lake?
Levels of temperature and dissolved oxygen are among the factors affecting the productivity. In general, the dominance of Bacillariophyceae in the lake plays an important role in productivity, where it represented more than 65 % to the total count of phytoplankton during the period of study.