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Whale and Krill Ecology in the Ocean — Antarctic Humpback Whale Feeding on Krill and a Closeup of the Tiny Creature

Now that people are harvesting krill from the ocean for human consumption, ecologists are concerned that we are competing with the whales that eat massive amounts of krill. For example, a blue whale will consume 35,000 pounds of krill in a day, and that would feed a lot of humans. This development requires a better understanding of whale and krill ecology and its effect on other ocean creatures.

Recent studies by Stanford University ecologists have shown that the oceans’ ecosystems are far more complex than we previously understood. For example, the whale consumption of krill is a significant part of the open ocean ecology. Krill contain large amounts of iron. When whales eat the krill, they defecate the iron back into the ocean, releasing it for other life forms.

Phytoplankton must have iron to survive, and they would die without the whales eating the krill. In turn, phytoplankton are critical to many other living things in the ocean, including the krill. For that reason, researchers concluded that more krill existed in the Antarctic Ocean before whaling killed 1.5 million baleen whales between 1910 and 1970. Whales are not just massive food consumers but also a significant factor in preserving life in the sea.

Feeding the human population requires an understanding that every creature has a role in the creation. As we understand whale and krill ecology, we see the delicate balance in the natural world. That evidence of God’s design work reminds us of the importance of biblically-based stewardship of the creation. That biblical perspective is vital to good science and applying science to solve human problems. It’s another example of the compatibility of science and faith. They are friends, not enemies, and must work together to benefit us all.

Reference: National Wildlife magazine, June-July 2022, page 10 and Stanford.edu

They are microscopic plants. You may never see them individually, but they exist by the millions on or near the surface of oceans, lakes, and rivers, even in polar regions. Scientists call them phytoplankton which comes from two Greek words that mean “plant drifter.” We call them oxygen generators.

You can see masses of green phytoplankton on the water surface because of the green chlorophyll they contain. Chlorophyll enables them to use sunlight and nutrients from the water to produce the nourishment they need to live. In the process of photosynthesis, they are oxygen generators. Of course, humans and all animals must have the oxygen to breathe, and phytoplankton play an essential role in our climate by controlling the balance between oxygen and carbon dioxide in the atmosphere.

In the ocean, tiny animals called krill eat phytoplankton. In turn, the krill provide the diet for many fish and even for huge baleen whales. Those whales stir up the ocean, bringing to the surface minerals which the phytoplankton need. As whales eat and grow, they take in large amounts of carbon. When they die, their bodies containing the carbon sink to the bottom of the ocean. This well-engineered system helps prevent the build-up of greenhouse gases in the atmosphere.

Phytoplankton are incredibly diverse, with thousands of different species. The microscopic photo shows members of one class of phytoplankton known as diatoms. The carcasses of phytoplankton, algae, and other marine plants deposited on the sea beds long ago became the petroleum we use today.

Diatoms produce silicon shells, and when they die, those shells form deep deposits on the ocean floor. People mine those microscopic shells and use them for what we call diatomite or diatomaceous earth used in industry for fine polishing and for filtering liquids. In addition, gardeners sprinkle diatomaceous earth around their plants to protect them from insect pests. Scientists are also exploring uses for those microscopic shells in nanotechnology.

So, in addition to being oxygen generators, these tiny plants produce energy sources for humans and food for creatures of the ocean and freshwater lakes. Without them, our climate would be much different, and life would be difficult, if not impossible. Chance evolution doesn’t seem to be an adequate explanation for diverse phytoplankton. We see them as another example of design by the Master Designer of life.

Tag: baleen whales

Whale and Krill Ecology in the Ocean

Oxygen Generators and More