The growth of new forests may have triggered mass extinctions 360 million years ago by triggering a prosperous plankton boom that attracted all the oxygen in the ocean-experts say this is happening even faster now
- The sediment records show that the new forest triggered the Devonian extinction
- There is a link between the new growth and the explosion of plankton
- Experts suggest that about 360 million years ago, new vegetation around the world began to grow
- This pushes new nutrients into the soil and drips into the ocean in the form of waves.
- This is enough to make plankton flourish on a global scale
- The flowers then swallowed all the oxygen and suffocated marine animals
The Devonian extinction wiped out 70% of life on our planet about 360 million years ago, but the cause of the fatal event is still a mystery.
These animals, most of which are marine species, are due to the exhaustion of oxygen in the Earth’s oceans and previous work has shown volcanic eruptions or even supernovae, but a new study found that new forests grew in the ancient world.
An international team of scientists has found evidence that fresh vegetation releases nutrients and makes seaweeds multiply. Seaweed swallows all oxygen and suffocates everything that lives in salt water.
A separate investigation shows that there are currently hundreds of “dead zones” in the world. Life cannot survive due to the same reasons that triggered the extinction of the Devonian. Experts say, “The rate of occurrence is much faster than that of the late Devonian. .”
The Devonian extinction wiped out 70% of life on our planet about 360 million years ago, but the cause of the fatal event is still a mystery.But a study shows that it is the growth of new forests all over the world that triggered the deadly event
Mass extinctions are one of the five major species that plague the planet, and have previously been blamed on asteroid impacts, climate change, sea level changes, and large-scale volcanic activity.
The research report read in the May issue of “Earth and Planets” said: “It is speculated that gradual volcanism was the cause of the intermittent hypoxia in the late Devonian, but the frequency of volcanic activity is unlikely to be related to the orbital period. Science Letters.
“On the contrary, volcanic eruptions may have changed the chemical properties of the terrestrial environment (for example, making the soil fertile), which may lead to eutrophication and hypoxia through the orbital rhythm of land input.”
However, the research team told InsideScience that volcanic activity may have contributed to the extinction that lasted about 20 million years.
An international team of scientists has found evidence that fresh vegetation releases nutrients, causing seaweed to multiply, and seaweed swallows all oxygen and suffocates all living things in the sea.
The Devonian extinction wiped out 70% of the mammals on our planet about 360 million years ago, but the cause of the fatal event is still a mystery.The picture shows what our planet looked like about 360 million years ago
This study investigated the Upper Devonian Chattanooga Shale in Tennessee, where they found evidence that the new forest of that period was the culprit.
This is a geological formation spanning Alabama, Arkansas, Kentucky, Missouri, and Tennessee, and is home to a group of fossils dating back to the Devonian period.
Approximately 65 samples were collected from the site and sent to the laboratory to measure the concentration of molecules related to oxygen levels in the ocean, plankton blooming, plant material, and soil and sediment erosion.
The fluctuation of these chemical fingerprints or “agents” led the team to find the answer.
When a lot of nutrients flow into the ocean and plankton activity increases, they can see the correlation.
A separate investigation shows that there are currently hundreds of “dead zones” in the world. Life cannot survive due to the same reasons that triggered the extinction of the Devonian. Experts say, “The rate of occurrence is much faster than that of the late Devonian. “.
The study read: “The initial forest radiation may significantly change the weathering pattern of the land and release a large amount of nutrients from the continent to the ocean.”
The late Devonian was plagued by strong monsoons, which led to the growth of new forests around the world.
As these vegetation sprouted in the small shed, the soil became richer, new nutrients dripped into the ocean in the form of waves, and a large number of plankton was bred to absorb all the oxygen.
However, the team warned that a similar process is happening today, and it appears to be happening much faster than it was about 360 million years ago.
When is the “Big Five Must” events of the earth?
Traditionally, scientists have mentioned the mass extinctions of the “Big Five”, including the most famous mass extinction caused by a meteorite impact, which led to the extinction of the dinosaurs 66 million years ago.
However, the mass extinctions of other major species are caused by phenomena that originated entirely on the earth. Although they are little known, we may learn something by exploring them. These phenomena may help us understand the current environment. crisis.
- Late Ordovician: This ancient crisis, about 445 million years ago, witnessed two major waves of extinction, both of which were related to the advancement and retreat of the southern hemisphere ice sheet due to climate change. This makes it the only major method of extinction associated with global cooling.
- Late Devonian: Beginning 380 million years ago, this period is now considered the “pulse” of 20 million years of extinction. This extinction is related to major climate changes, which may have been caused by the eruption of the Viluy Traps volcano in modern Siberia. A major eruption can cause rapid fluctuations in sea level and reduce the oxygen content in the ocean.
- Middle Permian: Scientists recently discovered another event on the same scale as the “Big Five” 262 million years ago. This event occurred at the same time as the Emei Mountain eruption in China today. It is well known that this caused simultaneous extinction in tropical regions and high latitudes.
- Late Permian: The mass extinction of species in the late Permian period about 252 million years ago dwarfs all other events, and about 96% of species are extinct. The extinction was triggered by the huge eruption of the Siberian trap. The huge and long-term volcanic events that occurred in most of the modern period in Siberia led to a series of environmental impacts.
- Late Triassic: There are many similarities between the late Triassic event 201 million years ago and the late Permian event. This was caused by another large-scale eruption, this time in the Mid-Atlantic Magma Province, which heralded the split of the supercontinent Pangea and the initial opening of the Atlantic that later became the Atlantic Ocean.