Green Giants: How Forests Shape Our Biodiversity

Forests, often dubbed the lungs of our planet, play a pivotal role in sustaining the rich tapestry of life that makes Earth unique. This article explores how these verdant expanses contribute to biodiversity, serving as a cradle for a myriad of species while also bolstering the ecological services essential for our survival. Through a blend of scientific insights and accessible explanations, we’ll uncover the intricate ways in which forests foster biodiversity and why their preservation is crucial for the future.

Forests as biodiversity hotspots

At first glance, forests are a mesmerizing green expanse, but delve deeper, and you’ll find they are bustling metropolises of life. Scientists estimate that forests house over 80% of the world’s terrestrial biodiversity (FAO, 2020). From towering trees to microscopic fungi, every organism plays a part in this complex ecological puzzle. The variety of habitats found in forests, such as canopies, understorey, and forest floors, create niches for different species, illustrating nature’s intricate web of life.

Borneo Rainforest Lodge, Credit: Wikimedia/Gido

The keystone role of trees

Trees themselves are marvels of biodiversity. Each species provides unique resources, like food and shelter, for a host of other organisms. The majestic oak, for instance, supports hundreds of insect species, which are vital food sources for birds and mammals (RSPB, n.d.). This interdependency highlights how the loss of a single tree species can ripple through the ecosystem, affecting countless other organisms.

Forests and ecosystem services

Beyond hosting a diverse array of life, forests render invaluable ecosystem services. They purify the air we breathe, filter the water we drink, and mitigate climate change by sequestering carbon dioxide (World Bank, 2012). These benefits are not just ecological but also economic, underscoring the importance of forests in supporting human well-being alongside biodiversity.

Ecosystem cascade for structuring marine spatial planning, Credit: Wikimedia/Miriam von Thenen, Pia Frederiksen, Henning Sten Hansen and Kerstin S. Schiele

The impact of forest diversity on resilience

Diverse forests are more resilient to threats like disease, fire, and climate change (Thompson et al., 2009). This resilience stems from various species, each with different roles and responses to environmental stressors. A forest with a wide array of tree species, for example, is less likely to succumb to a pest outbreak than a monoculture, where the loss of a single species can devastate the entire system.

Connectivity: The key to sustaining biodiversity

Forest connectivity, or the ability for species to move between habitats, is crucial for maintaining biodiversity. Corridors between forested areas allow animals to migrate, find mates, and access new food sources, reducing the risks of inbreeding and local extinctions (Gilbert-Norton et al., 2010). This connectivity is especially vital in the face of climate change, as species need to shift their ranges to adapt to shifting environmental conditions.

The underappreciated role of understorey and soil organisms

While towering trees dominate forest landscapes, the understorey and soil beneath harbor a hidden world of biodiversity. Understorey plants provide habitat and food for insects and ground-dwelling animals, while soil organisms, from bacteria to earthworms, play critical roles in nutrient cycling and soil health, supporting the entire forest ecosystem from the ground up (Wardle et al., 2004).

Scarlet macaw, Credit: Wikimedia/Charles J. Sharp

The threats to forest biodiversity

Despite their importance, forests worldwide face unprecedented threats from deforestation, habitat fragmentation, and climate change. The Amazon, often called the “Earth’s green lung,” is a stark example, where vast tracts of forest are lost annually, impacting global biodiversity (WWF, 2020). Protecting these ecosystems is not just about conserving species but also about preserving the ecological processes that sustain life on Earth.

Conservation efforts and sustainable management

Efforts to conserve forest biodiversity involve protected areas, sustainable management practices, and community-based conservation. By integrating conservation with sustainable development, we can ensure forests continue to thrive while meeting human needs. Initiatives like REDD+ (Reducing Emissions from Deforestation and Forest Degradation) aim to create financial value for the carbon stored in forests, incentivizing conservation and sustainable management practices.

The role of research and citizen science

Advancing our understanding of forests and biodiversity requires ongoing research. Scientists are unraveling the complexities of forest ecosystems, but there’s still much to learn. Citizen science projects, where volunteers contribute to data collection and monitoring, play an increasingly important role in conservation, helping to track changes in biodiversity and the impacts of conservation efforts.

A call to action

The preservation of forest biodiversity is the responsibility of conservationists and everyone. Simple actions, such as use of sustainable products, reducing consumption, and raising awareness, can have profound impacts. As stewards of the planet, we must ensure that forests continue to buzz with life for generations to come.


Forests are not just collections of trees but complex, dynamic ecosystems vital for sustaining biodiversity on our planet. Their conservation is a critical challenge that requires global cooperation and action. By understanding and valuing the role of forests in biodiversity, we can work towards a more sustainable and biodiverse future.

In crafting this exploration of forests and biodiversity, we have delved into the essence of these ecosystems, showcasing their importance not just for the myriad species they support but for humanity itself. It’s a reminder of the interconnectedness of life and the critical role we play in preserving these natural treasures. As we move forward, let the preservation of forests and their biodiversity be a testament to our commitment to a healthier, more resilient planet.


1.What is reduced emission from deforestation and forest degradation?

Reducing Emissions from Deforestation and Forest Degradation (REDD) is an effort to create a financial value for the carbon stored in forests, offering incentives for developing countries to reduce emissions from forested lands..

2. Why is Amazon rainforest called the lungs of the earth?

Amazon rainforest is the most biodiverse region on earth, providing shelter to three million species on plants and animals. Billions of trees absorb tons of carbon dioxide every year and slow down the climate change along with producing 20% of earth’s oxygen, hence named ‘Lungs of Earth


Global Forest Resources Assessment 2020 (FRA 2020).

Thompson, I., Mackey, B., McNulty, S., Mosseler, A. (2009). Forest Resilience, Biodiversity, and Climate Change. A synthesis of the biodiversity/resilience/stability relationship in forest ecosystems. Secretariat of the Convention on Biological Diversity, Montreal. Technical Series no. 43, 67 pages.

Gilbert-Norton, L., Wilson, R., Stevens, J. R., & Beard, K. H. (2010). A meta-analytic review of corridor effectiveness. Conservation biology: the journal of the Society for Conservation Biology, 24(3), 660–668.


Wardle, D. A., Bardgett, R. D., Klironomos, J. N., Setälä, H., Van Der Putten, W. H., & Wall, D. H. (2004). Ecological linkages between aboveground and belowground biota. Science, 304(5677), 1629–1633.

Craig Beatty, Martha Stevenson, Pablo Pacheco, Annika Terrana, Mandy Folse, and Aubrey Cody/  The Vitality of Forests.


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