Question: How do biotic factors affect coral reefs?

What biotic factors affect coral reefs?

Biotic factors include plants, animals, and microbes; important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients dissolved in the water, proximity to land, depth, and temperature.

How do abiotic factors affect coral reefs?

Abiotic Factors. There are multiple abiotic factors that affect coral reefs (figure 8-1). … If there is too little light, then the zooxanthellae will not be able to photosynthesize and produce food for corals. Too much light, especially ultraviolet (UV), may cause corals to expel zooxanthellae, causing them to bleach.

What are two abiotic factors that can damage the coral reef?

As the environment of coral reefs naturally is very stable, reefs are easily affected by sudden changes of abiotic factors, like salinity, temperature, oxygen content, and water transparency. Coral reefs are “low input ecosystems” concerning flow of matter (D’Elia and Wiebe, 1990).

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What factors affect corals?

Pollution, overfishing, destructive fishing practices using dynamite or cyanide, collecting live corals for the aquarium market, mining coral for building materials, and a warming climate are some of the many ways that people damage reefs all around the world every day.

How do biotic and abiotic factors interact in an aquatic ecosystem?

In general, abiotic factors like rock, soil, and water interact with biotic factors in the form of providing nutrients. Just as humans mine mountains and cultivate soil, rock and soil provide resources for plants, and plants cycle the nutrients through so they (usually) end up back in the ground where they began.

Which is a biotic factor in a marine ecosystem?

Like all ecosystems, aquatic ecosystems have five biotic or living factors: producers, consumers, herbivores, carnivores, omnivores, and decomposers.

What biotic factors are impacting the Great Barrier Reef?

Biotic factors of The Great Barrier Reef are the living components of the ecosystem, they include: coral, animals (such as sea turtles, crabs, sea urchins ,fish, sharks, eels, dolphins and seals), plants (like seaweed and plankton) and bacteria.

How does salt affect coral reefs?

Abiotic Factors and Coral Reefs

Both temperature and salinity affect calcification, restricting tropical coral reefs to waters between 23–29°C and in a salinity range of 32–40‰ (Figure 5). … In addition, turbidity reduces light penetration, which restricts coral growth.

What are the biotic and abiotic factors in the Great Barrier Reef?

Temperature and sunlight are two abiotic factors found in nearly every ecosystem, but since the Great Barrier Reef is an aquatic ecosystem, it has some additional abiotic components, including buoyancy, viscosity, light penetration, salts, gases and water density.

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What are 5 major abiotic factors in coral reefs?

Five major abiotic factors in coral reefs are water, temperature, sunlight, salt, and waves. All of these are parts of the coral reef ecosystem that are not alive but have a major impact on the conditions of that ecosystem. All coral reefs are found in ocean waters, mainly in shallow, tropical areas.

Is Athlete’s Foot biotic or abiotic?

Examples of Abiotic Factors

Athlete’s Foot is an example of a biotic factor. Athlete’s Foot is a fungal infection affecting the skin between the toes. Athlete’s Foot is a biotic factor because it is an alive, growing thing that affects other living things.

What are the biggest threats to coral reefs?

Increased ocean temperatures and changing ocean chemistry are the greatest global threats to coral reef ecosystems. These threats are caused by warmer atmospheric temperatures and increasing levels of carbon dioxide in seawater.

What is coral mining?

Coral mining can include blasting of massive areas of reef with dynamite or large scale removal of coral manually in patches throughout a reef. Many countries have banned coral mining, such as Sri Lanka and Indonesia, but due to lack of enforcement, the practice continues.

How does deforestation affect coral reefs?

Deforestation can cause high amounts of soil erosion. With rainfall the loose soil finds its way into coastal waters through waterways. The muddy freshwater smothers the coral, blocking light and damaging coral tissue, which can lead to bleaching and deterioration of the reef and its ecosystem.

How does sea level rise affect coral reefs?

Sea level rise: may lead to increases in sedimentation for reefs located near land-based sources of sediment. Sedimentation runoff can lead to the smothering of coral. … Ocean acidification (a result of increased CO2): causes a reduction in pH levels which decreases coral growth and structural integrity.

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