Biogeography

Biogeography is the study of how different plants, animals, and other living things are found in various places on Earth and how they have changed over time. Scientists look at where species live, from the poles to the tropics, and from sea level to the highest mountains. They also study how things like distance, climate, and the shape of the land affect where organisms can survive.

This field brings together ideas from many areas of science, such as the study of living things, how they change over time, and the Earth’s physical features. By understanding biogeography, we can learn how animals and plants move, adapt, and survive in different environments.

Important scientists like Carl Linnaeus and Alfred Russel Wallace helped shape this science. Their work shows how biogeography helps us understand the natural world and how it has developed across the planet.

Introduction

The way plants and animals are found in different places can often be explained by looking at history. Things like new species forming, old ones disappearing, the movement of continents, and big changes in ice and weather all play a part. By studying where species live, we can learn about changes in sea levels, rivers, and habitats. Biogeography also looks at how land shapes where animals and plants can survive.

Scientists study how species have lived in the past and now, including places where they hide during tough times. They use special tools like Geographic Information Systems (GIS) to understand and predict how species might move in the future. Islands are great places to study biogeography because they are smaller and easier to understand. Scientists can see how new species change an island's habits and then use that knowledge to learn about bigger areas. Islands have many different climates, from tropical to arctic, which helps scientists study a wide range of species around the world.

History

18th century

The study of biogeography began in the mid-1700s when Europeans explored the world and wrote about the many plants and animals they found. Two important scientists shaped early ideas. Carl Linnaeus improved how we group living things and noticed that species changed based on where they lived, like on mountains at different heights. This helped start the science of biogeography.

Georges-Louis Leclerc, Comte de Buffon also studied how animals and plants spread around the world. He thought all living things came from one place and later spread to new areas. Buffon noticed that similar places far apart often had different species, which became an important rule in biogeography.

19th century

In the 1800s, more scientists added to our understanding. Alexander von Humboldt traveled the world and showed how climate affects what plants grow where. He created maps showing temperature lines to help explain these patterns.

Augustin de Candolle studied plants and how they compete, influencing another scientist, Charles Darwin. Darwin’s work in places like the Galapagos Islands led him to develop the idea of natural selection, explaining how species change over time.

Alfred Russel Wallace studied animals in places like the Amazon Basin and the Malay Archipelago. His work helped prove ideas about how species evolve and move between areas.

20th and 21st century

In 1912, Alfred Wegener proposed that continents slowly move over time, changing how species spread. His idea, called Continental Drift, became widely accepted much later.

Other scientists developed new ways to study biogeography using chemistry and genetics. These tools help us understand how species are related and how they moved to new places, even across oceans. Biogeography remains an important field for understanding life on Earth.

Modern applications

Biogeography today uses many different areas of science, such as studying the land, rocks, plants, animals, and computer models. Scientists who study biogeography look at how the world and people change where animals and plants live. They use this knowledge to help protect nature, predict how weather changes might affect animals, and plan where to grow food.

New technology, like satellites, helps scientists see the whole Earth and track things like sea temperatures and animal movements. There are special websites that collect information about where different species are found, helping scientists understand more about life on our planet.

Paleobiogeography

See also: Dinosaur paleobiogeography

Paleobiogeography studies how ancient lands and oceans shaped where animals and plants lived long ago. It looks at how the movement of Earth's plates changed where species could travel. For example, scientists have found that perching birds first evolved in Australia or nearby Antarctica. Over time, they spread to other parts of the world.

This field also helps us understand when and how different groups of animals appeared in certain places. It shows that many fish species in the Amazon River developed over millions of years, slowly adapting to their environment rather than appearing all at once. Fresh water animals often live in separate areas divided by land, and changes in rivers and landscapes can bring them together or keep them apart.

Concepts and fields

Biogeography is a science that connects many fields, including geography, biology, soil science, geology, climatology, ecology, and evolution.

Important ideas in biogeography include how species change when they are separated by distance, how new species can form, and how animals and plants move to new places. It also looks at areas where certain plants or animals are found only there, and how natural barriers can split up groups of living things.

Biogeographic units

Biogeographic units are different areas used to study where plants, animals, and other living things live. These units include things like biogeographic realms, bioregions, ecoregions, and biomes. Each of these helps scientists understand how living things are spread out across the Earth.

In 2008, some scientists suggested rules for naming these areas, but not many people used them. Scientists who study very old distributions of life also had some rules, but these weren’t widely accepted either. This might be because scientists who study these topics don’t have big groups or societies to organize them.