How Corals Feed: Symbiosis, Nutrition and Survival Under Stress

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A coral skeleton records growth, but living tissue supplies the energy that makes growth possible. Corals are animals, yet many reef corals obtain energy through a partnership with photosynthetic microorganisms. They can also feed on external resources. Understanding these energy pathways helps explain why changes in light, food and water conditions can affect coral growth and survival. [1] Two important energy pathways In photosymbiotic corals, algal partners capture light energy and share products of photosynthesis with the host. The animal also obtains food through heterotrophy, including the capture or uptake of organic resources. Their relative contributions differ among species and environments. [1] Symbiosis illustration, Figure 1 from the bleaching overview; used here to explain the nutritional partnership. Image: Norma Olguín-López and colleagues (2017) , IntechOpen source , CC BY 3.0 . Reproduced without scientific alteration. What does trophic plasticity mean? Trophic plasti...
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The myths about specific gemstone types

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 Myths About Gemstones

Myths about gemstones have been around since ancient times, and they vary from culture to culture. While some people believe that certain gemstones have supernatural powers, others are more skeptical. No matter what your opinion is, here are some popular myths about gemstones that have been around for centuries.

 

One of the most popular myths is that wearing a certain gemstone can bring protection against negative energies. This belief originated in India, where Hindus believe that certain gemstones contain a protective power known as “mantras”. This belief is so widespread that there is even an Indian proverb that translates to “a man of gold is better than one of stone.” In other cultures, gemstones are eschewed as demonic.

 

Another common belief is that certain gemstones can enhance one’s psychic powers. It is believed that wearing a gemstone can increase one’s mental clarity, sharpness and intuition. In southeast Asia, gemstones are often used in fortune-telling and palm-reading rituals.

 

Healing properties are also attributed to gemstones. In Indian culture, gemstones are thought to have the power to heal certain physical ailments. For example, in Indian Ayurvedic medicine, rubies are believed to cure stomach ulcers, while sapphires can help alleviate headaches and anxiety.

 

Another myth provides us with some insight into the superstitious beliefs regarding gemstones. It is said that if a person wears two types of gems together, he or she will attract good luck. This belief likely originates from the idea that when two different elements are combined, unity is created.

 

Finally, some cultures believe that wearing a certain gemstone on an appropriate day will bring good luck and fortune. For example, in Hinduism, Tuesday is considered an auspicious day to wear a ruby, while Thursday is the day to wear a sapphire.

 

Regardless of what you believe, gemstones have been important to humans since ancient times. Whether you believe their mystical powers or not, they make beautiful and eye-catching adornments. With a bit of imagination, wearing a gemstone can add a little extra sparkle to your day.


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