All types of marine life are important. Seaweed (海藻) and corals both play vital roles in the health of the ocean and the health of our communities.

However in the same way that a mountain lion. Which provides a valuable service by hunting diseased or elderly deer, wouldn’t be helping anyone if it took up residence in an office building. Seaweed largely prevents corals from performing their key function in the ecosystem, just like the lion would prevent any of the terrified office workers from doing their work.

There is long-standing competition between seaweed and corals and this competition has been influenced heavily for over a century by overfishing climate change, and coral discases, which resulted in corals being now too weak to compete with seaweed.

Seaweed too often is blocking sunlight from reaching baby corals, while releasing chemicals that prevent corals from reproducing-as well as making them marc likely to be attacked by diseases.

The researchers from Florida International University supposed that if sufficiently distributed, the Caribbean king crab (蟹), lovingly called the “reef (礁)goat”, could make coral reefs free of seaweed fast, so they conducted a case-control study where they released the crabs on some reefs and let some others remain crab-less.

Eating seaweed at a rate higher than any other grazer (食草动物), the crabs were able to reduce seaweed cover by 80%, while a 3 to 5 fold increase of both baby corals and fish species added to the successful outcome.

On dry land, goats have been used as ground clearers for thousands of years, as they eat everything from clover and grasses to poison oak and invasive blackberry thorns. Hopefully, the results of this study can solidify Caribbean king crabs as their equivalent at the bottom of the sea.

On a sunny afternoon in Dania Beach, a dozen scientist’s unloaded containers full of corals from a dive boat. They gently removed each piece from large tanks on the deck and placed them inside smaller containers, which were slowly taken onshore.

The operation is part of what scientists describe as a “Noah’s Ark(诺亚方舟)” mission to save corals from extinction as a mysterious disease damages mile after mile of the Florida Reef Tract. Since first being spotted in 2014, the disease has killed colonies already weakened by impacts from climate change, including frequent rounds of bleaching(漂泊).

During one trip, researchers spent six days diving in the Lower Keys to collect corals that haven’t yet been touched by a certain disease. Their mission, as the “Ark” reference suggests, is to preserve healthy examples of species that can be raised in labs, then later transplanted back to the barrier reef that parallels much of the Southeast Florida coastline.

“It’s a tough effort, but we need to do everything we can to help corals survive,” said Richard Dodge from Nova South eastern University’s [(NSU)] Halmos College, as he watched university staff and volunteers place the 341 corals in holding tanks on the university dock across from Port Everglades.

NSU is one of seven research facilities that will act as temporary hosts for samples collected for what is formally known as the Coral Rescue Collection Plan, part of an ambitious program led by the National Oceanographic and Atmospheric Administration. NSU researchers will collect data on the species, then send them to other universities and zoos across the country, where they will be used to grow new colonies—seed stock for potential restoration efforts in the future.

Beginning 2020, the fifth generation of wireless technology is expected to be widely used throughout the world. The new network, called 5G, promises to give faster speeds and a higher capacity for the use of more devices. However, while some companies are competing to be the first to deliver 5G to the consumer, the environmental influences of the new network are being overlooked.

There is some evidence that the new devices and technologies associated with 5G will be harmful to ecosystems. The main component of the 5G network that will affect the earth's ecosystems is the millimeter waves. The millimeter waves that are being used in developing the 5G network have never been used at such scale(规模)before. Studies have found that there are some harms caused by these new technologies.

The millimeter waves, specifically, had a detrimental effect on birds. In a study, researchers observed that after exposure to radiation from a cell tower for just 5~30 minutes, the eggs of sparrows were disfigured. The disfiguration of birds exposed for such a short amount of time to these frequencies(频率)is significant considering that the new 5G network will have a much higher density(浓度)of base stations(small cells) throughout areas needing connection. The potential dangers of having so many small cells all over areas where birds live could threaten their population's survival.

Additionally, it was found that cellular devices were linked to many disturbances in the ecosystems of bees. In this study, beehives exposed for just ten minutes to 900MHz waves fell victim to colony collapse disorder(蜂群崩坏症候群). Bees are an incredibly important part of the earth's ecosystem. Around one-third of the food produced today is dependent on bees for pollination(授粉), making bees are a vital part of the agricultural system.

The impact that the cell towers have on birds and bees is important to understand, because all ecosystems of the earth are interconnected. If one component of an ecosystem is disrupted the whole system will be affected.