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Darker seawater color and lower light transmission will cause marine plants to have less photosynthesis.
Among the visible light radiated by the sun, red light, the most important for plant photosynthesis, is strongly absorbed at the surface, and the proportion of blue light increases as we get closer. pushes in.
Compared to dry land, the ocean often lacks light. As depth increases, the light intensity gradually decreases and the spectral composition changes. To adapt to this condition, the pigment composition of many plants contains more auxiliary algae, allowing them to effectively use green and blue light underwater.
Many plants, especially algae, are often yellow, red or brown. However, sometimes the color change is not necessarily an adaptation to light conditions.e, but can be linked to nutritional conditions.
I thought algae was the general name for ocean plants, but that's not the case. Algae is a type of plant, but ocean plants are not necessarily algae. Compared to the millions of discovered and undiscovered marine animals, ocean plants are not numerous in terms of habitat or species, and their forms have been replaced by many marine animals, such as crinoids and marine gills.
Look around you, in the colorful ocean world, animals look like stones, animals look like plants, animals look like animals, it's unbearable!
Crinoids
Also, most of the plants in the ocean are kelp, nori seaweed, etc. In the besieged ocean, there are only seagrasses representing higher plants, taking root in the vast ocean world.
Animals fanastics and where to find them 2: algae.
Weird: the only angiosperm that can live entirely in the ocean.
Giant algae
Algae is a general term for a class of higher angiosperms, below algae. There are 74 species in total, belonging to 6 families and 13 genera. This article selects widely used and common algae and explains them in detail. Although the name is algae, it is actually a kind of grass.
Angiosperms are a type of higher plants characterized by the differentiation of roots, stems, leaves, flowers and fruits. Most other plants in the ocean are algae, which are a type of lower plant. They are characterized by undifferentiated roots, stems and leaves, and spores are used for reproduction instead of seeds.
Algae and cyanobacteria (prokaryotes) are the first organisms on earth. They playplay a decisive role in changing the Earth's atmosphere from anaerobic to aerobic, so many algae in the ocean are not uncommon today.
Underwater algae
However, the origin of angiosperms and the ocean has always been a mystery. In the process of biological evolution, there is a very critical step, which involves landing, leaving the swath of the ocean, embarking on a new, unknown world, and unleashing more evolutionary potential. It was the implementation of paleontology that ultimately gave rise to intelligent life like us humans. The process of animals landing has always been traceable, and there are even living fossils like the coelacanth to explain the excitement.
However, the landing of plants and their return to the ocean is foggy. Due to the long period and slow development, the plants have not fallen to the ground. Too many discs remain. Likewise, weWe know almost nothing about how seagrasses, the only group that lives entirely in the ocean, return to the ocean.