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Mass extinctions of marine species are believed to have been caused by which event?
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What are some extinctions by meteors?
The most famous of course is the extinction of the Dinosaurs 65 million years ago in the Cretaceous - Tertiary period.Prior to that there was the Triassic - Jurassicextinction about 205 million years ago. Although this is a disputed impact extinction, it is still one of the theories.The most devastating was the Permian - Triassicextinction 250 million years ago in which 96% of all marine species and 70% of all land species were killed including insects. This extinction event is believed to be a series of small extinctions over time or 2 large extinctions , there are several theories from climate change to impact.The further back you go the harder it is to estimate extinctions because of the lack of fossil records but two more that are listed are.The late Devonian extinction 360-375 million years ago, again a disputed impact event, but a comet or meteor is among the favoured.And Ordovician - Silurian extinction 440-450 million years ago.
Marine protozoa do not have contractile vacuole why?
because marine species are usually in isotonic equilibrium with their environment.
What will happen if we don't stop marine pollution?
We may start to see a decrease in marine life population due to poisoning caused by the pollution.
What is aquamarine biology?
Marine biology is the scientific study of organisms in the ocean or other marine or brackish bodies of water. Given that inbiology many phyla, families and genera have some species that live in the sea and others that live on land, marine biology classifies species based on the environment rather than on taxonomy.
What is the meaning of marine biology?
Marine biology is the scientific study of organisms in the ocean or other marine bodies of water. Given that in biology many phyla, families and genera have some species that live in the sea and others that live on land,marine biology classifies species based on the environment rather than on taxonomy.
Why do you think most extinction's occur as background extinctions?
Most extinctions occur as background extinctions because they are longer time periods unlike the shorter mass extinctions which there were only two in the Paleozoic era, the Ordovician mass extinction, and the Permian/Triassic extinction in which 95% of all marine animals became extinct
How do you spell marine species?
That is the correct spelling of "marine species" (there are many for animals and plants).
What are some extinctions by meteors?
The most famous of course is the extinction of the Dinosaurs 65 million years ago in the Cretaceous - Tertiary period.Prior to that there was the Triassic - Jurassicextinction about 205 million years ago. Although this is a disputed impact extinction, it is still one of the theories.The most devastating was the Permian - Triassicextinction 250 million years ago in which 96% of all marine species and 70% of all land species were killed including insects. This extinction event is believed to be a series of small extinctions over time or 2 large extinctions , there are several theories from climate change to impact.The further back you go the harder it is to estimate extinctions because of the lack of fossil records but two more that are listed are.The late Devonian extinction 360-375 million years ago, again a disputed impact event, but a comet or meteor is among the favoured.And Ordovician - Silurian extinction 440-450 million years ago.
Can fish cause a mass extinction?
Yes I believe that fish could possibly cause mass extinctions. The rise of any species or family of animals or plants can cause mass extinctions. Grass had this effect when it flourished after the end of the Cretaceous Period. One particular species of hairless ape rose up from humble starts in Africa to become rulers of the the planet and cause the extinction of a great many species. All the fish would need is some change in environment that meant they could multiply numbers enough to have an effect or maybe evolve to have such advantage that they can come to dominate their environment. If there was a sudden rise in numbers with an algae eating fish such the bi-colour blenny then theoretically they could strip the oceans free of algae which remove large amounts of Carbon Dioxide from the atmosphere each year. This could cause global problems not just for marine life but also land based life as well. Fishes causing extinctions has precedents in history. The rise of the placoderms (armored fish) in the Devonian Period possibly caused the extinction of many species of marine arthropods. The went on to dominate the oceans for millions of years.
What has killed off marine species in the past?
oil spills, trash and bacteria has been killing the marine species
What marine species is ranched?
Salmon.
Marine life in Bahrain?
There are several marine species living around Bahrain. They include 30 species of sharks, sting rays, different species of coral, and dugongs.
What are the problems caused by marine pollution?
Marine pollution kills life in seas
How did aristotle contribute to marine science?
He identified more that 117 new marine species.
What species are polar bears?
Polar bear is their species. They are a type of marine mammal.
How Many species of marine mammals are there?
There are fully marine mammals and sub-marine mammals, this is only the fully marine mammals (Sirenids and Cetaceans). Sirenia There are only 3 manatee species and 1 dugong Cetacea There are 96 species of whale, dolphin, beaked whale, and porpoise. That makes a total of 100 species exactly, but there are still species to discover.
Marine protozoa do not have contractile vacuole why?
because marine species are usually in isotonic equilibrium with their environment.
