ipl-logo

Oceanic Dispersal Essay

1234 Words5 Pages
bulb-icon

Recommended: Oceanic dispersal

The resurrection of oceanic dispersal in historical biodiversity. by Alan de Queiroz.

The distribution of many taxa that are separated by oceans can be explained by either vicariance or oceanic dispersal. At first oceanic dispersal was the explanation used for the distribution of taxa separated by oceans. Since the 1930s till the 1960s time oceanic dispersal was the most common explanation because there were many plausible dispersal mechanisms that would make oceanic dispersal possible. Support for the plausibility of oceanic dispersal was provided by experiments performed by Darwin and his supporters that showed that organisms (mostly plants seeds) could survive in oceans for extensive time periods. More importantly it was argued that organisms …show more content…

Geographical distribution of where fossils were found also casts doubt on tectonic vicariance.

Tectonic vicariance relies on the overlap between area cladograms and fragmentation history. The discrepancy between these two factors does however, not imply that oceanic dispersal is the answer, because there are many different methods of dispersal.

Many studies have tried to prove the disjunct distribution of taxa to be due to vicariance alone, but sister taxa separated by an ocean can be explained by an old vicariance event or recent oceanic dispersal, but in most of these cases the molecular divergence is too small to be explained by vicariance. Studies using fossils showed that most plant species in New Zealand is due to oceanic dispersal. The size of the role oceanic dispersal plays in the distribution of animals is debateable. Some studies show that oceanic dispersal plays a small role in the distribution of Southern Hemisphere animals, since animals have more difficulty crossing oceanic barriers. Other studies, however, suggest that most vertebrate species from the West Indies and Madagascar are derived from ancestors that used oceanic dispersal. Oceanic dispersal is not necessarily more important than vicariance, but oceanic dispersal has a large role in these disjunct

Show More
Related
2212 Words | 9 Pages

The last remnant of the supercontinent Gondwanaland finally separated into Australia and Antarctica between 30 and 40 million years ago. Isolated on an enormous northward-drifting raft the inhabitants of the Australian continent evolved and diversified over millions of years as the climate cycled through periods of warm and cool, wet and dry. Fossils Found in Riversleigh Our

Read More
1677 Words | 7 Pages

INTRODUCTION The Cretaceous Period, spanning 65.5-146 million years ago (Mya), was a world different from what we are familiar with today. Planetary changes during this period included the extinction of dinosaurs and drastic global warming. The breakup of the super continent Pangea had started about 30 Mya, and seaways had begun to form and cover landmass that had once been a part of the super continent (Geologic Time). Today, scientists know that one of these landmasses, the North American continent as we now know it, was at one point covered by a vast inland sea known as the Western Interior Seaway.

Read More
1118 Words | 5 Pages

The Infinite Sea, by Rick Yancey, is the second installment in the 5th wave series. A follow up to the New York Times bestseller, The Infinite Sea continues the story of Cassie Sullivan and her friends weathering the inhumane conditions brought on by the “Others”. The book has an intriguing plot, but Rick Yancey focuses too much on the characterization, and makes the book too wordy, killing the momentum of the story therefore boring readers. However the book makes up for this by brilliantly using dialogue to finish with a powerful cliffhanger, captivating those who make it to the end of the book. Being an apocalyptic story, by nature, The Infinite Sea should be filled to the brim with action, as well as a steady uncovering of the secrets

Read More
907 Words | 4 Pages

Biology 3T Classes 19, 21 Mayr, “One Long Argument”, chapters 1-4, 6 Post your answers to these questions on Blackboard before Class 19 Chapter 1 • What did you find out about Darwin in this chapter? • Darwin believed that all life had a common origin. His areas of interest and expertise extended beyond evolution, from animal psychology to the study of barnacles. • Whose ideas influenced Darwin?

Read More
1988 Words | 8 Pages

The lower parts have been submerged and desiccated, shown by the layers of travertine, strand formations, and beaches (9). Scientists can infer that the basin was once filled with seawater due to the discovery of fossilized marine shells, corals, and oysters in the rock (9). The fossils are now above tide-level showing a change in elevation of the region (9). Dr. Stephen Bowers, who studies the region, writes, "The water of the old Tertiary Sea, which once prevailed here, must have been extremely favorable to the propagation and growth of mollusks, especially oysters”. There is also evidence of volcanic activity around the area in the form of craters stemming from Pinacate, an extinct volcano (9).

Read More
556 Words | 3 Pages

Running head: Geologic History Paper 1 Geologic History Paper Chevian S Dudley Ohio Christian University December 10, 2017 Running head: Geologic History Paper 2 Naturalistic Evolutionary is the view that species of life comes from natural causes only, it happens without a motive are any supernatural being. It is a theory that tries to explain the development of living species. Naturalistic Evolutionary is a natural process. The theory of evolution is part of cosmology and part abiogenesis that leads to comprehensive model of the organ of species, the Earth

Read More
310 Words | 2 Pages

As seen by looking at the geologic time scale it is clear that different environments allow for different evolution to occur. The three theories

Read More
458 Words | 2 Pages

The Viverridae family consist of 34 species in 20 different genera. The main animals that make up these families are the Civets, the Linsangs, and the Genets. The information below will talk about the fossil records, comparing and contrasting between the species traits, comparing and contrasting the job and environment of the species, evaluating the adaptive value of the traits in each species, give the approximation of the time of speciation and theorized cause of speciation, and find a common ancestor between the three chosen species. For this information I have chosen to do the Asian Palm Civet (Genetta Genetta), Common Genet (Paradoxurus Hermaphroditus), and the African Linsang (Poiana Richardsonii). The image on the right is a picture of an Asian Palm Civet skull and jaw line being and example of fossil records.

Read More
761 Words | 4 Pages

And shows that animals indeed did evolve from lager extinct animals. The voyage as so important to the development of his theory because it shows that fossils were evidence of evolutionary

Read More
561 Words | 3 Pages

chapter 1: 1.When Darwin young, he never want to be a doctor. He woulc like to follow the steps of his family, rather than he was interested in exploring new horizons. And Henslow tried capture his attention, to persuade Charlie into the seven volumes of reading other 's books, and let him to travel and see how the world looks like. 2.Darwin was interested in shells and coral, about 30 feet of sea level and the band, Darwin began to wonder if the sea level drops, or made the island rise up. 3.Species on the Galapagos islands is not from those found in South America is completely different, but they are still not the same.

Read More
542 Words | 3 Pages

This week in our language arts class we read the short story “Survive the Savage Seas” by Dougal Robertson, a story about a man and his family who sold everything they had to buy a yacht on which they would explore the open seas for the year, or so they think. To make a long story short the Robertson family and their family friend end up attacked by killer whales and the boat aka Lucy was sunk. They all pile onto a raft and dingy and then they are forced to live off the sea till they are rescued. This brings me to the question that is the origin of this essay; Can people live as successfully on the sea as they can on land. I am going to provide three reasons to cajole you that people can successfully establish a sustainable society on the sea as well as you can on land.

Read More
154 Words | 1 Pages

Four pieces of evidence used to support the theory of evolution are fossil records, homology, biogeography, and molecular evidence. Organisms of the past in rock layers are called fossils. Bones, teeth, or imprints that are remnant of prior life on earth supports the theory of evolution. Biogeography involves the comparison of species around the world that live in different regions. We can learn from biogeography of what organisms may have migrated from a place of origin and evolve into new species (Rocklin Unified School District, n.d.,).

Read More
799 Words | 4 Pages

Marine organisms are animals, plants, and other living things that live in the ocean. A Marine biologist is a scientist who studies marine organisms and studies the bodies, behavior, and the history of marine organisms. They also study how marine organisms interact with each other and their environment. I have chosen to research about Marine biology because I would like to learn about sea life, the ocean, and its surrounding environment. To start off, a Marine biologist might study coral, crabs, fish, microscopic marine organisms, sea stars, seaweed, squid, or whales.

Read More
1412 Words | 6 Pages

If evolution was a true event that happened, there should be many transitional species today that scientists could study. Today scientists don’t have any live animals that are thought to be a transitional species that is going to evolve into something else. With similar species thought to come from a common ancestor, all traits of one of the species should be found in the other species in about the same area. There are many cases where two species have many things in common, but the two species also have some very distinct characteristics that are unbridgeable between the two. This means that there had to have been different ancestors that had things about them that kept them from having a common

Read More
1298 Words | 6 Pages

The ocean… The sound of the waves applauding and hugging the shore. The internal sounds of the body out in the world’s biggest swimming pool. The echo of my sister’s laughter. The salty smell so strong that one can taste it dancing on ones taste buds.

Read More

More about Oceanic Dispersal Essay

Related Topics

Open Document