seagrass Archives - DOES GOD EXIST? TODAY

May 20, 2024May 19, 2024

Green Sea Turtles and Migration

They are sea turtles with a carapace that is olive to black. So, why are they called green sea turtles (Chelonia mydas)? These sea creatures live in tropical and subtropical areas of the Atlantic and Pacific. They eat seagrasses along the shore by biting off the tips rather than pulling them up by the roots. By doing that, they keep the seagrasses healthy, and the green vegetation makes their body fat turn green, which is where they got their name.

Green sea turtles migrate far from their feeding grounds to various remote islands where they lay their eggs. Many of them live along the coast of Brazil, and a large percentage of those lay their eggs on Ascension Island. Ascension is a small volcanic island 1400 miles (2250 kilometers) out in the Atlantic Ocean. Because the prevailing equatorial current runs from Ascension to Brazil’s coast, it takes the adult turtles 50 days to swim from Brazil to Ascension Island. They make the return trip in less than 30 days, swimming with the current.

We could ask, “What advantage does this migration have?” The answer is easy. Ascension Island has sandy beaches where the turtles can lay their eggs. There are few predators on the island, so the percentage of the eggs that hatch and survive is high. When the hatchlings are ready, they paddle out into the equatorial current and float back to Brazil.

There are more challenging questions we might ask. How do these turtles locate Ascension Island? What caused them to go there in the first place? Can we explain this migration by chance? Researchers have made suggestions, but the answers remain unclear. Maybe the best answer is that God has provided a way for these slow and harmless creatures to survive. They keep the seagrasses healthy in their home areas while serving a role in the fauna of the isolated volcanic desert island called Ascension. Green sea turtles are part of God’s amazing web of living things.

August 30, 2021August 27, 2021

Hidden Designs in Creation

A regular feature in the Does God Exist? quarterly journal is what we call “Dandy Designs.” Those pages feature examples of design in living things that speak of God’s wisdom. We have collected many of those examples in five volumes of Dandy Designs booklets. In addition to obvious designs we notice every day, there are many hidden designs in creation that are vital to our existence.

Defenders magazine carried an interesting article about seagrass. Standing by the ocean shore, you may not be aware that seagrass even exists. It grows on the ocean floor in large meadows similar to those we see on land. Recent concerns about seagrass have made headlines as the Florida manatees that feed on seagrass have been dying in large numbers because of pollution killing seagrass meadows.

Seagrass is not just manatee food. It also benefits humans directly. The Defender article lists five direct ways in which we benefit from seagrass:

1) One acre of seagrass produces 50,000 liters of oxygen per day.
2) One acre of seagrass can absorb 3500 miles worth of carbon emitted by an average car each year.
3) One acre of seagrass will support 40,000 fish and 50 million invertebrates.
4) One acre of seagrass will absorb enough nutrients to treat the amount of sewage created by 100 people annually.
5) One acre of seagrass will generate $35,000 in ecological services every year.

We live in a time of massive change, with global warming and ecological problems threatening our world in a way not apparent in previous years. Yet, as Christians, we believe that we need to care for and protect God’s creation, and the more we learn about the hidden designs in Creation, the better we can do that.

Reference: Summer 2021 edition of Defenders magazine, page 8.

December 18, 2020December 16, 2020

Incredible Diversity of Plants

We often take plants for granted, but their design has allowed animal and human life to exist and offers great hope for the future. We are amazed at the incredible diversity of plants.

Plants not only sustain life on the land but also in the oceans. Seagrass meadows exist all over the planet. Studies in England have shown that 92% of seagrass meadows have disappeared due to pollution, industrial development, and other threats. That has led to a decline in fish and shellfish populations. Yesterday we talked about seahorses, which depend on seagrass for food and protection. The World Wildlife Federation has begun a project called Seagrass Ocean Rescue to reverse the damage by collecting seeds and replanting them in huge plots. The project has protected shorelines and provided nursing grounds for countless species in the hope that coastal life will rebound.

The redwood and sequoia trees that grow in California are very different plant designs. Those giant trees bring water into what would otherwise be a very dry area. The redwoods and sequoias can extract water from fog and rain because of their size, providing a rich soil ecology for other plants. A giant sequoia will weigh around 640 tons – equal to about 107 elephants. They can grow to heights over 300 feet and live for well over 3000 years. You can find information about California’s 1.6 million acres of redwoods and the 48,000 acres that depend on the giant sequoias at www.savetheredwoods.org.

Because of the incredible diversity of plants, we find them growing underwater and in deserts, but some plants known as epiphytes grow in the air. They have exposed roots that pick up moisture and nutrients from the perspective, and they are a food source for many organisms. Closely related are water plants that don’t need soil but can use the nutrients released by fish and other animals that live in oceans and lakes.

Science has developed new aquaponics and hydroponics methods to grow plants in water to produce food for people. In aquaponics, the plants receive their nutrients from the waste products of fish living in the water. In hydroponics, the plants receive their nutrients artificially.

We find plants of all kinds growing everywhere, and because of that, animals can live everywhere. With creative agricultural practices, we can produce enough food to feed the growing human population. Our geologic studies show us that, from the beginning, plants have provided the oxygen that we breathe while removing the carbon dioxide we produce. The plant diversity God has given us makes it possible to produce food, remove pollutants, and recycle carbon. Without the incredible diversity of plants, animal and human life would not be possible.

May 26, 2017May 19, 2024

Underwater Bees

Those of us who live many miles from the ocean may not think about what goes on under the water. Similar to the land, there is an enormous diversity of plants in the sea. Just like land plants, ocean plants have flowers and pollinate and reproduce. Seagrass grows on the floor of the ocean and provides a habitat for sea turtles, manatees, and many other marine animals. There are some 60 species of seagrass, and those grasses bloom and release pollen. Like land plants, seagrasses need something like the bees that help pollinate land plants. So are there underwater bees?

Researchers at the National Autonomous University of Mexico have reported that hundreds of crustaceans and other small insect-like animals visit plants and bring pollen with them. These invertebrates are the “underwater bees.” They allow ocean vegetation to flourish, along with ocean currents.

As scientists study ways in which carbon can be locked up to avoid high concentrations in our atmosphere, they find that the ocean is a major factor in avoiding the runaway greenhouse heating of the earth. Life in the oceans is essential to life on land.

Here is another design feature of this planet that is critical to the long-term existence of life on Earth. In the 1950s, scientists thought that there were maybe five or six factors that would be critical to the existence of life. The famous Drake Equation of how many planets could have life on them only considered five factors in its original format. Now we know there are a huge number of things that have to be “right” to allow life to exist.

Every time we find a new variable, the odds against life occurring by chance on planet Earth become greater. God’s wisdom and design can be seen everywhere around us. Truly, “the heavens declare the glory of God and the firmament shows His handiwork” (Psalms 19:1).

Reference: National Wildlife, June/July 2017, page 8.