What is a good turbidity level for fish?

Fish were tested in high (40–68 Nephelometric Turbidity Units (NTU)/ 154 mg/L) and low (0.4–1.4 NTU/ 0 mg/L) turbidity conditions. Typical turbidity levels can vary by site but low levels range from about 0.5–5 NTU, while higher levels are 10–100 times that e.g.62,63.

What is a limiting factor for sea urchins?

The limiting factor for short term is oxygen use. Adding too many animals will reduce the oxygen level below survival level.

What is good water clarity?

Ideally, the plankton bloom should result in water clarity of 18-24 inches. The plankton bloom also provides the main building block of the aquatic food chain. The universal tool for measuring water clarity is called a Secchi disk.

What is ocean calcification?

Marine biogenic calcification is the process by which marine organisms such as oysters and clams form calcium carbonate. Seawater is full of dissolved compounds, ions and nutrients that organisms can use for energy and, in the case of calcification, to build shells and outer structures.

What is the relationship between water temperature and urchin survival?

What is the relationship between temperature and sea urchin survival? Although the sea urchins live in sea water in cold temperature, they require a temperature of around 23 degrees to cleave for fertilisation if this temperature is reduced the process of cleavage slows down eventually depleting the urchin population.

What water temperature do sea urchins live in?

The purple sea urchin can tolerate temperatures of 41o to 74oF (5o-23.5oC). Water temperatures above about 79oF (26oC) cause massive die-offs.

Why can kelp grow in warm water?

“There’s a tight association between temperature and nitrate,” Parnell said. “If water gets too warm, there’s not very much nitrate, so kelps don’t grow. So above about 15 degrees Celsius [about 60 degrees Fahrenheit] bottom temperatures in the kelp forest, the kelps don’t have enough nitrate to grow and reproduce.”

Why do high nutrient levels reduce water quality for fish and other organisms?

Too much nitrogen and phosphorus in the water causes algae to grow faster than ecosystems can handle. Significant increases in algae harm water quality, food resources and habitats, and decrease the oxygen that fish and other aquatic life need to survive.

Why do otters need clear water?

Clean Water Paws-itively Necessary for Otters To survive, otters need clean water in relatively specific, undisturbed environments. This and their small numbers spread across wide ranges have made them extremely vulnerable to pollution, habitat destruction and historical, unregulated trapping.

Why does kelp grow better in cold water?

Kelp thrives in cold, nutrient-rich waters. Because kelp attaches to the seafloor and eventually grows to the water’s surface and relies on sunlight to generate food and energy, kelp forests are always coastal and require shallow, relatively clear water.

Why does water at the ocean bottom have more dissolved oxygen than seawater at a depth of about 1000 meters?

Why does water at the ocean bottom have more dissolved oxygen then seawater at a depth of about 1000 menters? Cold and dense water contains more oxygen then warm less dense water so water at the ocean bottom has more dissolved oxygen.

Why is the sand orange at sandy point?

Yes, the Sandy Point Beach sand really is orange. That’s due to natural iron ore in the rock in the area. The shade of orange changes with the light. It’s colorful, not dangerous.

Why is water clarity an important measure of water quality?

Because water clarity is closely related to light penetration, it has important implications for the diversity and productivity of aquatic life that a system can support. For example, clearer water allows more sunlight to reach submerged aquatic vegetation.

Why is water quality so important?

Water quality is one of the most important factors in a healthy ecosystem. Clean water supports a diversity of plants and wildlife. Though it may seem unrelated at first, our actions on land affect the quality of our water.

Why might slower growth make sea urchins more vulnerable?

Young sea urchins have been observed to grow slower and have thinner, smaller, misshapen protective shells when raised in acidified conditions, like those expected to exist by the year 2100. Slower growth rates and deformed shells may leave urchins more vulnerable to predators and decrease their ability to survive.

Can sea cucumbers regenerate?

Sea cucumbers are known to exhibit extensive regenerative ability and regenerate a wide spectrum of body parts, e.g. their body wall, the nervous system, and internal organs, such as the digestive system, reproductive organs, and respiratory trees.

Are sea cucumbers intelligent?

Sea cucumbers have no brain and thus we usually regard them as animals without intelligence. They are, however, intelligent in their body walls.

Are tiger tail sea cucumbers poisonous?

Reef Tank 365 A) Cucumbers are NOT venomous! They may be toxic to a tank if they die, but that is TOTALLY different!

Can cucumber heal wounds?

Cucumber contains fats in the seeds that might help to lower cholesterol. The fruit contains chemicals that might help to reduce swelling (inflammation) and speed up wound healing.

Can cucumber remove acne scars?

Cucumber is a wonderful natural ingredient to treat acne scars because it contains various vitamins and minerals like magnesium, which are beneficial to the skin. Cucumber reduces the appearance of scars and reduces inflammation. It heals and soothes the skin.