Ecosystem of the Congo Basin Rainforest

The Congo Basin rainforest, spanning six Central African countries, is the second-largest tropical forest in the world. Although it teems with life, scientists have only begun to uncover the vast array of species and ecological relationships that exist within it, leaving much of the ecosystem still poorly understood. Over the course of two years, photographer Christian Ziegler documented diversity, from ants to towering trees, aiming to shed light on the rainforest’s hidden wonders and emphasize its critical importance for global climate and conservation.

Africa’s last Eden

South of the mighty Congo River stretches a vast rainforest covering about 500,000 square kilometers. This green paradise, as seen in the view over the forest of the LuiKotale study site, is extremely diverse.

The rainforest supports a diversity of life, including human communities. This savannah grassland is kept free of trees by fires that are lit for human hunting.

This huge fig tree was one of the largest that Christian Ziegler saw in his time in the Congo.

A strangling fig in the rainforest.

The forest is flooded with small streams. When chasing after bonobos, Christian Ziegler would run along the sandy steram beds, which were the only clear paths through the forest.

Bonobos, found only in the Congo basin, are emblematic of the ecosystem. This jeuvenile bonobo watched Ziegler intently before it was taken away by its mother.

The forest boasts a great variety of fruit tree species, which ripen at different times of the year, providing animals with a continuous supply of food. These fruits and seeds were collected from the forest floor in the month of July. 

The forest is key to the livlihood of an enormous community of living beings, including humans. This collection of medicinally important plants from the Congo rainforest were identified and harvested wtih the help of a local botanist.

The Congolese botanist who helped Ziegler collect plants from the rainforest.

Fungi, both visible and microscopic, also play a central role in this finely tuned ecosystem. Many of these fungi have not yet been scientifically documented.

Driver ants are ecological keystone species in the African rainforest.

Driver ants form huge colonies underground. They act as “cleanup crews” by preying on insects, thereby influencing the composition of species on the forest floor.

Ants and a butterfly.

A highly camouflaged katydid.

An immense web.

A monitor lizard.
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