What limits productivity in tropical oceans and why?
In tropical oceans productivity is limited year-round by the lack of nutrients. In tropical oceans productivity is limited year-round by the lack of sunlight. In temperate oceans the fall bloom is limited by the lack of sunlight. In temperate oceans the spring bloom is limited by the lack of sunlight.
Why is primary production low in the tropics?
The surface water is always warm and there is always a pronounced thermocline, leading to highly stratified water that prevents the nutrient-rich bottom water from reaching the surface (section 6.2). Thus productivity in tropical water is always nutrient-limited, and productivity is low throughout the year (Figure 7.4.
What are the limiting factors of ocean primary production?
These factors include the availability of essential inorganic nutrients, particularly nitrogen and phosphorus; water temperature; and the turbidity of the water. Open oceans have relatively low primary productivity because of low levels of the essential nutrients nitrogen and phosphorus.
What is the limiting factor of primary production in the tropics?
At low latitudes the limiting factor for primary production is: sunlight.
Why do tropical oceans have low productivity?
In the vast unproductive low- and mid-latitude ocean, warm and sunlit surface water is separated from cold, nutrient-rich interior water by a strong density difference that restricts mixing of water and thereby reduces nutrient supply, which becomes the limiting factor for productivity.
Why is productivity low in tropical regions quizlet?
Biological productivity is low in tropical regions because the strong thermocline prevents the mixing of waters and movement of nutrients. Polar regions have low biological production because of the lack of sunlight.
What controls or limits productivity in tropical regions?
Answer and Explanation: Primary productivity in tropical oceans is limited by the amount of nutrients available. Tropical oceans have plenty of sunlight in the upper regions,…
What makes the ocean least productive?
Availability of solar radiation is least in oceans; especially in deep oceans. Due to this, oceans are least productive.
What are some limiting factors for primary productivity?
On the other hand, the quality and quantity of light, the availability of water and nutrients, and temperature all vary dramatically from place to place. They are all candidates for the role of limiting factor….Factors limiting primary productivity in terrestrial communities.
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What is the major limiting factor to phytoplankton production in the tropical oceans?
Phytoplankton are limited by sunlight and nutrients at different times of the year.
Why is productivity low in tropical regions group of answer choices?
In tropical oceans, productivity is limited year-round by the lack of sunlight. In middle-latitude oceans, the fall bloom is limited by the lack of nutrients. In tropical oceans, productivity is limited year-round by the lack of nutrients.
What limits productivity in temperate oceans?
Productivity is low and limited because of lack of nutrients. The sun is more directly over head > light penetrates deeper into tropical ocean than in temperate and polar waters.
Why tropical waters are unproductive?
Why are tropical waters highly unproductive? Algae and other plants are able to photosynthesize to produce organic material from inorganic nutrients. And the organic material forms the building block for all animals higher up in the food chain.
Why do open oceans have low net primary productivity?
In open ocean, any dead material sinks to the ocean depths. The warmer, well lit surface layers, therefore, hold little nutrient.
What three factors control primary production in the open ocean?
All three processes are influenced by physical, chemical, and biological processes and vary across regional ecosystems.
What is the major limiting factor to phytoplankton production in the tropical oceans quizlet?
Phytoplankton are limited by sunlight and nutrients at different times of the year.
Why are tropical waters highly unproductive?
Why are tropical waters highly unproductive? Algae and other plants are able to photosynthesize to produce organic material from inorganic nutrients. And the organic material forms the building block for all animals higher up in the food chain.
What factors affect primary productivity?
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.
Why is the primary productivity of oceans less?
Sunlight is the major limiting factor in the oceans. As the depth of the ocean increases, the intensity of light decreases, thus decreasing the photosynthetic rate. This decrease in rate of photosynthesis will eventually decline the development of plants and animals thriving in the aquatic environment.
Why is primary productivity higher in tropical regions?
In Tropical Rainforests, water, sunlight, and high temperatures are consistent and a dense concentration of plants is present, causing both the GPP and NPP to be very high. So, high levels of productivity increase biomass.
What are the 2 main factors affecting primary production in our oceans?
Abstract. The rate of primary production of a parcel of a marine environment depends on light and on the chemical conditions provided by the physics of water masses.
What is primary productivity limited by in aquatic ecosystems?
Overall, terrestrial ecosystems contribute two-thirds of global net primary production, and marine ecosystems contribute approximately one-third. In aquatic ecosystems, light and nutrients limit primary production.
Why productivity is low in oceans?
Sunlight is the major limiting factor in the oceans. As the depth of the ocean increases, the intensity of light decreases, thus decreasing the photosynthetic rate. This decrease in rate of photosynthesis will eventually decline the development of plants and animals thriving in the aquatic environment.