What Does It Mean For The Ecosystem When Most Of The Interactions Are Weak?

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What Does It Mean For The Ecosystem When Most Of The Interactions Are Weak??

8. What does it mean for the ecosystem when most of the interactions are weak? If means that the complexity of the ecosystem is reduced. There is a lot less going on in the ecosystem.

How does this graph help us to understand how oysters affect the ratio of floating algae to sea floor algae?

Analysis of the data shows that the ratio of floating algae to sea floor algae dramatically increased at the same time that oysters were removed from the Bay. … (It is also possible to infer from the graph that high floating algae levels led to the decline in oysters.

When the oyster population decreased in the bay what happened to the floating algae?

Algal blooms caused by pollution and the lack of oysters in the Bay has led to the decline of ocean floor algae plants and like sea grass and an overgrowth of bacteria. Jellyfish that were once rare are now common. 2.

What happened after humans became part of the Chesapeake Bay ecosystem through fishing?

People fished out the oysters taking away the Bay’s natural filter. Without the filter the Bay is now filled with excess nutrient levels microbes and floating algae that would have been consumed by the oysters.

What does the increase in floating algae indicate?

One point emphasized in the worksheet is that floating algae begin to increase even before oyster harvesting begins. This is a record of the initial impact of farming by European settlers on the Bay due to the greater input of nutrients into the Bay from land clearing caused soil runoff.

Why are oysters important to the ecosystem?

Oysters are natural filter feeders. This means they feed by pumping water through their gills trapping particles of food as well as nutrients suspended sediments and chemical contaminants. In doing so oysters help keep the water clean and clear for underwater grasses and other aquatic life.

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How are oysters beneficial to the environment?

Besides providing seafood oysters make waters healthier. Because oysters feed by filtering algae from the water they function as a natural filter and improve water that is overloaded with nutrients. A single oyster filters up to 50 gallons of water per day.

How might changes in oyster populations impact other parts of the Chesapeake Bay ecosystem?

In other words more oysters equal better water quality. Without oysters the quality of the Bay ecosystem suffers. Without oyster filtration clearing the water for light to penetrate bay grasses can struggle to grow.

What are decomposers in the Chesapeake Bay?

Bacteria play an important role in the Bay. They are the decomposers breaking down dead plants and other matter. Through this process nutrients in dead plant and animal matter once again become available for growing plants. Zooplankton and other filter-feeding animals eat bacteria.

What animals eat algae in the Chesapeake Bay?

Oysters and clams filter algae out of the water. This helps to keep the Bay clean. But it also helps to turn algae into food that bigger animals can eat. Small animals called zooplankton which include tiny crustaceans known as copepods are the Bay’s grazers.

What eats phytoplankton in the Chesapeake Bay?

Phytoplankton are then are eaten by copepods which are members of the microscopic animal community called zooplankton. Copepods are eaten by bay anchovies which are eaten by large fish such as bluefish and striped bass.

How does the amount of oxygen in water affect the oyster population?

They found that a lack of oxygen hinders the oysters’ ability to filter water and fend off the parasite that causes Dermo. Additionally the researchers determined that oysters living in waters with higher salinity were more vulnerable to the disease.

Why are oysters economically important?

The ecological importance of oysters contributes to its economic importance. Oysters are filter feeders which means they filter water as they feed. … Oyster reefs are also critical habitats for other organisms some of which are economically important like the Blue Crab.

What do oysters need to survive?

Oysters can survive in water that contains 5-35 ppt. Oysters thrive in salinity that ranges from 14-28 ppt. The optimum water temperature for oysters to survive is between 68-90 degrees Fahrenheit but adult oysters can tolerate water as cold as 38 degrees and as hot as 120 degrees for short periods of time.

Why are oysters a keystone species?

Oysters are a keystone species because they provide architectural complexity that serves as essential habitat in which many other marine species find refuge for their young and also from predators. They also provide important ecosystem services.

Do oysters feel pain?

Oysters have a small heart and internal organs but no central nervous system. Lack of a central nervous system makes it unlikely oysters feel pain one reason some vegans are comfortable eating oysters.

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Is oyster alive?

It’s Alive!

Oysters are still alive as you eat them! In fact if you are going to eat an oyster raw it has to be alive or else it will no longer be safe to eat. In the case of oysters alive means fresh!

Are oysters eco friendly?

And that’s a good thing because oysters are like environmental scrubbers: each one can filter up to 50 gallons of water per day removing nitrogen and phosphorous from the water the two biggest pollutants in the bay.

Is oyster farming bad for the environment?

Oysters farming usually results in a net removal of nutrients from the water column and may also compete with other organisms for survival (e.g seagrass) and this is generally considered to cause environmental damage.

Why are oysters important to the Chesapeake Bay ecosystem?

Oysters are an important part of the Chesapeake Bay. They filter and remove excess nutrients like nitrogen from the water and they grow in reefs that provide habitat for fish and crabs. Oyster reefs support not only the ecosystem but the economy.

What role do oysters play in the river ecosystem?

Oysters are filter feeders meaning they pump large volumes of water through their gills to sift out plankton and other particles they need for nourishmnet.

What is happening to the fish and shellfish populations in Chesapeake Bay?

Sadly over time many of the Bay’s fisheries have been taken for granted. People have polluted the water damaged vital fishery habitat like oyster reefs and underwater grass beds and engaged in overharvesting. As a result many of the Chesapeake Bay’s fisheries have been reduced in diversity and productivity.

How does the health of the Chesapeake Bay affect these industries Tourism & Recreation )?

The Chesapeake Bay strengthens the area’s fishing tourism and real estate industries generating economic and recreational benefits estimated at about $33 billion a year (“Cleaning Up the Chesapeake Bay”) however these industries have suffered as a result of the degradation of the Bay area’s ecosystems and of the …

Are horseshoe crabs decomposers?

In the Bay Ecosystem Horseshoe crabs eat primarily soft shelled clams mussels and other mollusks but at various stages of their lives they also consume plant material. This would make them omnivores. … Decomposers return nutrients to the ecosystem as abiotic factors to be used again by plants.

What organisms can be found above the water in the Chesapeake Bay?

Mammals. Larger creatures that thrive in the Bay include bottlenose dolphins which are plentiful in deeper waters but can also be found near harbors. Water mammals share the watershed with their on-land neighbors such as river otters the white-tailed and sika deer bobcats marsh rabbits muskrat and red fox.

Do decomposers breathe?

When things die they get decomposed by fungi and microorganisms which use the organic matter from the dead plants and animals to live and reproduce. The decomposers breathe out CO2 into the air and expel nutrients into the soil as waste and plants use the recycled compounds to grow as the cycle continues.

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Do sharks live in the Chesapeake Bay?

The Chesapeake Bay is visited by multiple species of sharks typically in the summer. Most of these species are found in the higher salinity waters of the lower Bay.

What kind of habitats are in Chesapeake Bay?

The Chesapeake Bay watershed has a wide variety of complex ecosystems including: Navigation The Chesapeake Bay watershed has a wide variety of complex ecosystems including:
  • Forests.
  • Rivers & Streams.
  • Aquatic Reefs & Pilings.
  • Beaches & Tidal Flats.
  • Marshes & Wetlands.
  • Open & Shallow Waters.

Why is the wildlife in the Chesapeake Bay struggling?

Unfortunately the Chesapeake Bay faces serious problems due to human activities including polluted stormwater runoff over-fertilization and pollution from animal wastes deforestation wetland destruction from agricultural urban and suburban development and sea level rise caused by global climate change.

What is the relationship between copepods and phytoplankton?

The copepods suppress large phytoplankton whereas nanoplanktonic algae increase in abundance (Sommer et al. 2003). The algal species that are resistant to grazing and predation are more likely to survive but also can make filter feeding more difficult.

Where are oysters on the food chain?

Oysters are shown in the food web above in the bivalves group. Oysters not only eat plankton they also make the water better for plankton.

What creature is between phytoplankton and penguins in the Antarctic food chain?

Antarctic krill provide a vital food source for whales seals ice fish and penguins. These animals depend on eating large quantities of krill for survival in the harsh climate. For their own meals Antarctic krill eat small plants like phytoplankton as well as algae under the surface of sea ice.

How does the amount of oxygen in the water affect the fish population?

As dissolved oxygen levels in water drop below 5.0 mg/l aquatic life is put under stress. The lower the concentration the greater the stress. Oxygen levels that remain below 1-2 mg/l for a few hours can result in large fish kills.

Do oysters need oxygen to live?

DO is very important because aquatic animals such as crabs and oysters need oxygen to live just like humans. Oysters and most animals that live on oyster reefs need at least 2-3 ppm DO to survive and larger fish need around 5 ppm.

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