In marine waters the most productive systems are brown algal beds, seagrass beds and coral reefs. The kelps, brown algae of the genera Laminaria and Macrocystis, form dense forests in the sublittoral zone of rocky coasts in cool waters.
Which is the most productive ecosystem?
Thus, tropical rain forests are the most productive ecosystem.
Which 3 ecosystems have the highest productivity?
The world’s ecosystems vary tremendously in productivity, as illustrated in the following figures. In terms of NPP per unit area, the most productive systems are estuaries, swamps and marshes, tropical rain forests, and temperate rain forests (see Figure 4).
Where is productivity highest in the ocean?
Higher chlorophyll concentrations and in general higher productivity are observed on the equator, along the coasts (especially eastern margins), and in the high latitude ocean (Figure 4a and b).
Is Deep Sea most productive ecosystem?
-Oceans contain lots of nutrients but they have no sufficient sunlight reaching in the deep areas, therefore, oceans have the least productivity among all ecosystems.
Is Deep Sea a productive ecosystem?
They estimate that worldwide, deep-sea hydrothermal vent microbial communities can produce more than 4,000 tons of organic carbon each day, the building block of life. That is roughly the same amount of carbon in 200 blue whales — making these ecosystems among the ocean’s most productive on a per volume basis.
What are the two most productive land ecosystems?
The two most productive are estuaries, swamps and marshes, and tropical rain forests. The two least productive are open ocean, tundra, and desert. About what percentage of total potential net primary productivity of the entire earth and the earth’s terrestrial ecosystems are used, wasted, or destroyed by humans?
What ecosystems are the least productive in the world?
Deserts, tundra, and the deep ocean are the least productive ecosystems, typically having an energy fixation of less than 0.5 × 103 kilocalories per square meter per year (thousands of kcal/m2/yr; it takes one calorie to raise the temperature of one gram of water by 34°F [1°C] under standard conditions, and there are …
Why productivity of ocean is low?
In ocean, sunlight is the main limiting factor which decreases the rate of photosynthesis. … Minerals and nutrients can also be a retarding factor based on location of the oceans.So, there will be less productivity than land which is 170 billion tons compared to 55 billion tons ion oceans.
What areas of the ocean are the most productive quizlet?
Which of the following regions in the ocean are the most productive: ocean gyres, the polar ocean, tropical ocean, or temperate ocean? The polar oceans. LOTS of sunlight and nutrients as well because of upwelling.
Which part of the ocean is most productive the middle of the ocean or near the continents?
1). Coastal waters are more productive than the central ocean for two main reasons. First, runoff from land often contains a high abundance of nutrients which get deposited in coastal waters and stimulate production.
Is Coral Reef the most productive ecosystem?
Coral reefs are among the most productive ecosystems on the planet, with the primary producers at the base of the food chain (including corals) supporting their complex food webs.
Are coral reefs least productive ecosystem?
In oceans, there are lots of nutrients but no sufficient sunlight is available in deep areas hence, oceans have least productivity. Grasslands are less productive ecosystem with annual productivity of 200-100gm/m2. Maximum productivity can be seen in coral reefs followed by estuaries.
Are coral reefs more productive than estuaries?
Estuaries rank with coral reefs and tropical rain forests as the most productive natural ecosystems on earth.
Index to Contents.
|Coral Reefs:||20 000|
|Tropical forests:||20 000|
|Moist temperate forests:||8 000|
|Upwelling zones in the sea:||6 000|