Mangrove

A mangrove is a shrub or tree that grows mainly in coastal saline or brackish water. They live in warm, equatorial places, usually along coastlines and tidal rivers. Mangroves have special ways to get oxygen and deal with salty water, which helps them survive where most plants cannot. Because of these skills, mangroves are found all around the world in tropical and subtropical areas, especially near the equator.

These trees and shrubs have strong root systems and can filter salt from water, letting them live in tough coastal places where the water is often filled with mud and has very little oxygen. Mangrove areas, called mangrove forests or mangal, are important habitats that help protect coastlines. They can reduce the power of big waves and storms like tsunamis, and they also help keep the Earth healthy by storing carbon.

People have been studying mangroves more with new technologies, and they know how much of these forests exists and how they are changing over time. Sadly, mangroves are sometimes cut down, which harms both the plants and the animals that depend on them. Because of this, many people are working on projects to mangrove restoration to help these important ecosystems grow again. Every year on July 26, the world celebrates the International Day for the Conservation of the Mangrove Ecosystem to remind everyone how valuable these forests are.

Etymology

The word "mangrove" has an interesting history and its origin is not fully known. It might have come from Portuguese or Spanish words, and could even trace back to languages from South America. Sometimes, people also use "mangrove" to talk about the whole area where these special plants grow, or just the big trees and shrubs in that area.

Biology

Mangroves are special trees and shrubs that grow in coastal areas with salty or brackish water. There are about 70 species of true mangroves, found mainly in warm, equatorial climates. They have unique adaptations that help them survive in tough conditions, such as salty water and waterlogged soils.

Mangroves have developed clever ways to get oxygen and manage salt. For example, the red mangrove uses stilt roots to stay above water and absorb air through special bark openings. The black mangrove has tiny "breathing tubes" that stick out of the mud to get oxygen. They also limit how much salt they take in and how much water they lose, helping them stay healthy even in harsh environments. Their seeds often grow while still attached to the tree, forming structures that can float and travel long distances before taking root in new places.

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Taxonomy and evolution

Mangroves are special trees and shrubs that grow in coastal areas with salty or brackish water. They are found in many parts of the world, especially in the Eastern Hemisphere, where there are six times more mangrove species than in the New World. Scientists believe that mangroves evolved from land plants that adapted to live in the challenging marine environment. Their diversity has grown slowly over time, with the first mangroves appearing as early as the Pennsylvanian period. It’s likely that mangroves are even older because life first began in the oceans.

Species distribution

See also: Mangrove tree distribution

Mangroves are tropical plants that also grow in some subtropical areas, such as South Florida, southern Japan, South Africa, New Zealand, and Victoria in Australia. These distant mangrove locations exist because of continuous coastlines, island chains, or seeds carried by warm ocean currents from richer mangrove areas. In places where mangroves grow farthest from the equator, they often appear as low, scrubby plants, sometimes forming forests in warmer northern areas and becoming shorter toward the south.

Mangrove forests

Mangrove forests, also called mangrove swamps or mangals, grow in tropical and subtropical areas near coasts and tidal rivers. They live in salty water that comes in with the tides and can handle big changes in salt, temperature, and water levels. Only a few types of trees can survive in these tough places.

These special trees have roots that help protect coastlines from strong waves and storms. They also give homes to many sea animals, like small fish and crabs, and help keep the environment healthy by storing carbon in the ground. Because they are important for nature and people, many places work hard to protect mangrove forests.

Mangrove microbiome

See also: Plant microbiome

Plant microbiomes are very important for the health and growth of mangroves. These tiny living things help mangroves grow by releasing special substances and improving the uptake of nutrients like phosphorus and nitrogen. Most studies on plant microbiomes have focused on common plants like rice, barley, wheat, maize, and soybean, but mangroves also have their own unique microbial friends.

Mangrove roots have many different microbes that help them survive. These microbes can change nutrients into forms the mangrove can use and even help protect the mangrove from harmful germs. In return, the mangrove gives the microbes food from its roots. This teamwork is very important for the mangrove’s health and growth. Scientists have found many types of these helpful microbes, including bacteria and fungi, which live close to the mangrove roots and help in many ways, like providing nitrogen and breaking down tough materials.