Nepedia
Back to Discover
Advanced Reader
🗺️

Mascarene Islands

geography Maturity 9-11 Next article →

The Mascarene Islands are a distinct archipelago located in the southwestern Indian Ocean. They sit east of Madagascar, generally between 700 and 1,500 kilometres away.

1780 Raynal and Bonne Map of Mascarene Islands, Reunion, Mauritius, Bourbon - Geographicus - GeneralesIsles-bonne-1780
1780 Raynal and Bonne Map of Mascarene Islands, Reunion, Mauritius, Bourbon - Geographicus - GeneralesIsles-bonne-1780

The islands are divided between two different political entities. Some belong to the Republic of Mauritius, while others are part of the French department of Réunion. This group forms a unique ecoregion. It is known for its high levels of endemism. Endemism means that many plants and animals live here and nowhere else on Earth.

The archipelago is built upon the Mascarene Plateau. This is a massive undersea plateau covering over 115,000 km2 of shallow water. The depths of the plateau range from 8 to 150 metres. At its edges, the floor plunges to 4,000 metres into the abyssal plain. The islands themselves are volcanic in origin. They were created by the Réunion hotspot, which is a source of volcanic activity beneath the Earth's crust. This hotspot caused different islands to rise from the ocean at different times in history.

Geological history shows a sequence of island formation. Saya de Malha was the first to rise about 35 million years ago. This was followed by the Nazareth Bank approximately two million years later. Other features include the Soudan Bank and the Cargados Carajos shoals. Mauritius formed much later, between 7 and 10 million years ago. It is considered the oldest of the currently existing large islands. Rodrigues and Réunion are the youngest members of the group. They both formed within the last two million years.

Piton de la Fournaise 1
Piton de la Fournaise 1

The islands vary greatly in size and physical shape. Réunion is the largest island, covering an area of 2,512 km2. It contains the highest peak in the archipelago, Piton des Neiges. This is an extinct volcano that reaches 3,069 metres above sea level.

Réunion HighAltitudeVegetation
Réunion HighAltitudeVegetation

Réunion also hosts Piton de la Fournaise, which is an active volcano. It is one of the most active volcanoes in the world. Mauritius is the second largest, with an area of 1,865 km2. It is also the most populous, with 1,252,964 people. Rodrigues is much smaller, with an area of only 108 km2.

Map of Isle de France (now Mauritius)-P6280065
Map of Isle de France (now Mauritius)-P6280065

Human history in the islands involves many different nations. The islands are named after the Portuguese navigator Pedro Mascarenhas.

D. Pedro Mascarenhas
D. Pedro Mascarenhas

While Arab sailors may have discovered Mauritius around 975, the first confirmed discovery was by the Portuguese in 1507. Over time, the Dutch, French, and British all held power here. The Dutch established settlements between 1598 and 1710. The French took control in 1715 and renamed Mauritius "Isle de France." The United Kingdom invaded Mauritius in 1810 to protect its ships from pirates. Mauritius eventually gained independence in 1968.

VOC
VOC

The climate across the archipelago is tropical and oceanic. At low elevations, summer temperatures average 30 °C. During the winter, temperatures are generally around 25 °C. The mountains are much cooler, with averages of 18 °C. On the high peaks of Réunion, short-lived snow can sometimes fall. Rainfall is heavily influenced by the southeasterly trade winds. This creates a difference between the windward and leeward sides of the islands. On Mauritius, mountain rainfall can reach as high as 4,455 mm annually.

Phyllanthus tenellus 1
Phyllanthus tenellus 1

Because of their isolation, the islands host diverse vegetation zones. These include dry lowland forests and wet rainforests. There are also montane cloud forests and high-elevation heathlands.

Foetidia mauritiana leaves
Foetidia mauritiana leaves

The plant communities change based on altitude and moisture. For example, dry lowland forests grow on leeward sides where rainfall is less than 1,000 mm. Palms are a dominant type of tree in these areas. Many of these plant species are endemic to the Mascarene forests. This complex ecosystem helps maintain the islands' unique biodiversity.

611 words

Where will your curiosity go next?

Keep exploring at your chosen reading level.

🖼️ Images & Media (10)
File:Piton de la Fournaise 1.JPG
Piton de la Fournaise 1.JPG
File:D. Pedro Mascarenhas.jpg
D. Pedro Mascarenhas.jpg
File:1780 Raynal and Bonne Map of Mascarene Islands, Reunion, Mauritius, Bourbon - Geographicus - GeneralesIsles-bonne-1780.jpg
1780 Raynal and Bonne Map of Mascarene...
File:VOC.svg
VOC.svg
File:Map_of_Isle_de_France_(now_Mauritius)-P6280065.JPG
Map_of_Isle_de_France_(now_Mauritius)-P6280065.JPG
File:Foetidia mauritiana leaves.jpg
Foetidia mauritiana leaves.jpg
File:Phyllanthus tenellus 1.jpg
Phyllanthus tenellus 1.jpg
File:Réunion HighAltitudeVegetation.JPG
Réunion HighAltitudeVegetation.JPG
File:Hoefnagel dodo.jpg
Hoefnagel dodo.jpg
File:The Saint Brandon Conservation Trust at Corporate Council on Africa in May 2024 in Dallas, Texas.png
The Saint Brandon Conservation Trust at...
More to explore

🔬 Go deeper

More advanced topics to explore

🪜 Step back

Simpler topics to build understanding

What is Nepedia?

A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.