The open ocean is the marine ecosystem that contains the fewest producers. This is because the open ocean has far fewer nutrients than other marine…
Which zone in the marine ecosystem receives most of the nutrients?
An estuary is a coastal zone where oceans meets rivers. Here, nutrients and salts from the ocean mix with those from the river in regions sheltered from extreme weather. As a result, estuaries are among the most productive places on Earth and support many types of life.
Why does the open ocean have a low biodiversity?
While it’s strange to think about, the open ocean, which makes up about 70% of the planet, has one of the lowest biodiversities we see in an ecosystem! This is because, just like humans, organisms in the ocean need nutrients to grow. The oceans get these essential nutrients from water that has run off from land.
Why does the open sea have low net primary productivity?
There is no sunlight to support photosynthesis, and this zone has little dissolved oxygen. NPP is quite low in the open sea, except in upwelling areas. However, because the open sea covers so much of the earth’s surface, it makes the largest contribution to the earth’s overall NPP.
Which of the following ecosystem has the lowest net primary productivity?
Deserts, tundra, the open ocean, and the lakes and streams biome all have the lowest amounts of primary productivity.
Which marine ecosystem supports the least life?
kelp forests, coral reefs. Which type of marine ecosystem do you think supports the least life? The deepest parts of the ocean where it is cold and sunlight cannot reach them. Also parts where there is a lot of pollution that kills off the marine life.
Where do most of the nutrients in an Arctic ecosystem come from?
Growth of the tiny plants at the base of marine food chains, microalgae, in the Arctic Ocean is fuelled by nutrient inputs from the Pacific and Atlantic Oceans, and from rivers around the Arctic Ocean rim.
What ecosystem contains both saltwater and freshwater?
Estuaries are transitional areas that straddle the land and the sea, as well as freshwater and saltwater habitats.
Why do estuaries have low species diversity?
Factors such as increased competition for food and higher predation rates by piscivorous fishes and birds may also play an important role in the low species richness and abundance of freshwater taxa in estuaries.
What kind of animals live in the ocean ecosystem?
The ocean contains a large variety of animal life, including fish, mollusks, dolphins, seals, walruses, whales, crustaceans, bacteria, sea anemones and many others. Most marine animals live in the top two ocean zones, where they have access to plants and other ocean animals to eat.
What world ecosystem have high and low net productivity Why?
About 40 to 85 percent of gross primary productivity is not used during respiration and becomes net primary productivity. The highest net primary productivity in terrestrial environments occurs in swamps and marshes and tropical rainforests; the lowest occurs in deserts.
Which of the following factors limit primary productivity tropical waters?
Primary productivity in tropical oceans is limited by the amount of nutrients available.
What is the limiting factor responsible for the low productivity of the open ocean in the saltwater biome?
Nutrients are scarce and this is a relatively less productive part of the marine biome. When photosynthetic organisms and the organisms that feed on them die, their bodies fall to the bottom of the ocean where they remain; the open ocean lacks a process for bringing the organic nutrients back up to the surface.