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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.
What organisms were affected the most?
The organisms that were affected the most by the mass extinction events in Earth's history were typically those that were less adaptable or specialized, such as large dinosaurs or marine organisms with specific environmental requirements. These events caused widespread extinctions and disruptions to ecosystems, leading to a significant loss of biodiversity.
Which organisms are associated with the red tide?
Red tides are often caused by the rapid growth of certain species of algae called dinoflagellates, particularly the genus Karenia. These algae produce toxins that can harm marine life and humans if ingested. Red tides can negatively impact marine ecosystems and fisheries.
Introduction aquatic species in the Philippines?
The Philippines is home to a diverse range of aquatic species due to its extensive coastline and marine habitats. These species include various fish, corals, marine mammals, and invertebrates, many of which are endemic to the region. The country's rich marine biodiversity supports both ecological balance and livelihoods for local communities.
What are some of the effects of lower pH water on marine organisms?
Lower pH water, caused by ocean acidification, can have harmful effects on marine organisms, especially those with carbonate shells or skeletons like corals, shellfish, and some plankton. It can weaken their structures and make it harder for them to grow and reproduce. Additionally, acidification can disrupt marine food webs and alter the behavior of some species.
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.
How many mass extinctions have occurred during earth's history?
There have been five major mass extinctions in Earth's history, known as the "Big Five." These events significantly altered biodiversity and led to the extinction of a large percentage of species. The most well-known of these is the Permian-Triassic extinction, which occurred around 252 million years ago and is believed to have eliminated about 90% of marine species. The most recent mass extinction, the Cretaceous-Paleogene event, occurred approximately 66 million years ago, leading to the extinction of the dinosaurs.
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
What are past extinctions?
Past extinctions refer to significant events in Earth's history where a substantial number of species died out over a relatively short geological timeframe. Notable examples include the Permian-Triassic extinction, which wiped out about 90% of marine species, and the Cretaceous-Paleogene extinction, responsible for the demise of the dinosaurs. These events were often triggered by catastrophic changes such as volcanic eruptions, climate shifts, and asteroid impacts, leading to profound ecological changes. The study of past extinctions helps scientists understand current biodiversity loss and its potential causes.
How do you spell marine species?
That is the correct spelling of "marine species" (there are many for animals and plants).
What was the first major extinction event?
First major extinction (c. 440 mya): Climate change (relatively severeand sudden global cooling) seems to have been at work at the first ofthese-the end-Ordovician mass extinction that caused such pronouncedchange in marine life (little or no life existed on land at that time). 25%of families lost (a family may consist of a few to thousands of species).
What has killed off marine species in the past?
oil spills, trash and bacteria has been killing the marine species
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 are the problems caused by marine pollution?
Marine pollution kills life in seas
What organisms were affected the most?
The organisms that were affected the most by the mass extinction events in Earth's history were typically those that were less adaptable or specialized, such as large dinosaurs or marine organisms with specific environmental requirements. These events caused widespread extinctions and disruptions to ecosystems, leading to a significant loss of biodiversity.
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.
