The research, encompassing an unprecedented database of approximately 68,000 plant species—which accounts for nearly 18% of the world’s known flora—employed sophisticated ecological simulations to predict shifts in species distributions under various climate change scenarios. These simulations integrate not only projected climatic alterations but also species’ potential to relocate geographically over time, a pioneering approach that enhances the precision of extinction risk assessments. The results reveal that between 7% and 16% of these plant species may lose upwards of 90% of their habitable range, placing them at extreme risk of extinction by the close of the century.

Central to the findings is the revelation that plants’ inherent capability to track shifting climate zones through dispersal is insufficient to offset the rapid and extensive loss of suitable habitat areas. The study highlights that habitat degradation and disappearance, exacerbated by rising temperatures and altered precipitation patterns, will eclipse any benefits that might arise from range shifts. This means that even if plants manage to move, the quality and size of their new habitats will often fall short of their survival requirements, a grim prognosis for global plant diversity.

This insight carries profound implications for conservation policies, particularly those advocating assisted migration, where humans actively facilitate the relocation of species to more climatically favorable regions. While such measures have gained traction as potential tools to mitigate biodiversity loss, the UC Davis study warns that assisted migration alone is unlikely to substantially reduce extinction rates. Instead, it advocates for integrated approaches that also prioritize habitat restoration and the protection of climate refugia—areas that remain relatively stable and hospitable despite global changes—to sustain vulnerable species.

Prominent in this extensive analysis are the projected extinction hotspots: southern Europe, the western United States, and southern Australia. These regions are anticipated to experience drastic contractions in plant habitat, threatening both ancient and economically critical species. For example, the spikemoss (Selaginella) in California, representing one of the oldest lineages of vascular plants with origins dating back over 400 million years, faces heightened vulnerability. Similarly, various species of eucalyptus in Australia, pivotal to native forests, biodiversity, indigenous cultural heritage, and the timber industry, are identified at significant risk.

Intriguingly, the researchers also found that climate-induced shifts could lead to localized increases in plant diversity. Approximately 28% of the Earth’s land area might witness augmented species richness as plants colonize new environments, especially in wetter regions such as the eastern United States, India, Southeast Asia, and southern parts of South America. These shifts will create novel assemblages of species, prompting unforeseen ecological interactions and complexities that challenge established conservation paradigms centered on historical species distributions.

Such dynamic changes spotlight the inevitable transformation of ecosystems and the necessity for adaptive management frameworks that recognize and incorporate novel species combinations. As senior author Xiaoli Dong poignantly notes, the ecological landscape of tomorrow will diverge dramatically from the familiar patterns of the past half-century, necessitating flexible conservation strategies that anticipate and respond to these shifts rather than attempting to preserve static conditions.

The research also emphasizes the critical role of ex situ conservation strategies, including seed banks and botanical gardens, which serve as repositories for genetic diversity and safeguards against the irreversible loss of plant species. These institutions, alongside the identification and management of climate refugia, will be crucial for preserving the genetic and medicinal value of plants under duress from climate pressures.

From a methodological perspective, the study advances the field by integrating the temporal dynamics of range shifts with the spatial complexity of habitat availability. This methodological innovation allowed the researchers to disentangle the intertwined effects of climate velocity and habitat fragmentation on extinction risk, revealing that the latter overwhelmingly dictates plant survival outcomes. The use of extensive species distribution data, combined with robust climate models, represents a significant leap forward in projecting biodiversity trajectories under global change.

Moreover, the findings stress the indispensable importance of aggressive greenhouse gas emission reductions to mitigate biodiversity loss. While localized conservation interventions have value, they are unlikely to counterbalance the habitat degradation driven by unchecked climate warming. This underscores a critical intersection of biodiversity conservation with global climate policy, highlighting the urgency of coordinated action to safeguard the planet’s botanical heritage.

In conclusion, the UC Davis study provides a technically rigorous and ecologically vital contribution to our understanding of how climate change will reshape global plant distributions and diversity. Its findings challenge existing conservation dogma, prioritize the role of habitat preservation, and call for an integrated, multifaceted approach to protecting plant species in an era of unprecedented environmental transformation. As the world grapples with climate change, these insights offer a roadmap for more effective stewardship of the planet’s vital green infrastructure.

Subject of Research: Global plant species extinction risk and range shifts due to climate change.

Article Title: Climate-induced range shifts support local plant diversity but don’t reduce extinction risk.

News Publication Date: 7-May-2026.

References: The study was published in Science and funded by the National Science Foundation, conducted by researchers at UC Davis, Yale University, the Centre for Synthesis and Analysis on Biodiversity (France), and Beijing Normal University.

Image Credits: Dean Nicolle, some rights reserved (CC-BY-NC).

Keywords: climate change, plant extinction, range shifts, habitat loss, biodiversity, ecological modeling, assisted migration, conservation strategies, climate refugia, species richness, eucalyptus, spikemoss.

Conventional ecosystem engineering emphasizes how individual species or groups modify their immediate physical environment to enhance survival and reproduction. Classic examples include beavers constructing dams that alter stream flow or prairie plants influencing soil composition locally. These engineering actions, while ecologically significant, typically have limited spatial and temporal footprints. In contrast, Earth system engineering expands this perspective by investigating biological mechanisms that have altered Earth’s chemical, physical, and climatic systems on a global scale through deep time, thereby affecting the planet’s entire biosphere and geosphere.

The scientists highlight that Earth system engineering includes processes that have cumulatively restructured planetary function, such as the advent of photosynthesis, which profoundly increased atmospheric oxygen and enabled the proliferation of animal life. Similarly, the evolution of rooting systems in ancient prairie plants drastically changed soil structure and nutrient cycles, with cascading effects that reshaped terrestrial ecosystems. These transformations involved multiple species working through complex interactions, reinforcing the idea that Earth system engineering is a collective biological phenomenon rather than the act of individual species.

A central question motivating the framework is whether humans represent a unique class of Earth system engineers, distinguished by the unparalleled scale and diversity of their environmental modifications. Human activities — including fossil fuel combustion, urbanization, and large-scale animal husbandry — have disrupted planetary processes to an unprecedented degree and pace. The framework offers tools to compare human-driven changes to past natural events, helping to contextualize humanity’s role within Earth’s evolutionary narrative and assess potential future trajectories amid ongoing climate change and biodiversity loss.

This novel perspective arose from a collaborative 2020 National Science Foundation Research Coordination Network Grant. Lyons, acting as the lead principal investigator, alongside co-principal investigators Simon Darroch and Peter Wagner, synthesized interdisciplinary data from paleontology, ecology, earth system science, and evolutionary biology. The integration of fossil records with modern observations enabled the team to formalize the concept of Earth system engineering, creating a unified terminology and framework to distinguish local ecosystem effects from those with biosphere-wide significance.

One of the technical strengths of this framework lies in its multi-scale, multi-temporal approach to defining engineering behaviors. It recognizes that some biological influences occur over millennia or longer, transforming Earth’s atmosphere, lithosphere, and hydrosphere in ways that support diverse life. Detecting these signals requires sophisticated analyses of geochemical proxies, sedimentary records, and fossil evidence, bridging disciplines to unravel life’s role in shaping planetary habitability.

Lyons emphasizes that formalizing Earth system engineering advances evolutionary theory by layering a systemic understanding of how engineering behaviors impact macroevolutionary patterns. The framework could lead to predictive models about how current anthropogenic impacts might sculpt the biosphere’s future, informing conservation strategies and climate policy. By framing humanity as potentially the latest Earth system engineers, researchers can leverage deep-time analogs to better anticipate the cascading effects of global change.

The paper’s implications extend beyond academia, potentially transforming public discourse about human-environment interactions. Contrasting the relatively localized impacts of classic ecosystem engineering with the planet-wide consequences of Earth system engineering underscores the scale of responsibility humanity holds. This conceptual shift may fuel more informed discussions about sustainability, planetary stewardship, and technological interventions designed to mitigate or amplify bioengineering effects.

The working group’s broad institutional representation—from the Senckenberg Museum of Natural History to universities and science museums worldwide—reflects the multidisciplinary nature of the challenge. Such diversity is vital to capture the complexity of interactions spanning biology, geology, atmospheric sciences, and anthropology. The collaborative nature of the project establishes a foundation for future research networks aimed at exploring biosphere processes and their profound impacts on Earth’s history and future trajectories.

Examining past Earth system engineering phenomena reveals how life has repeatedly undertaken transformative roles in reshaping the planet. Photosynthetic cyanobacteria, for example, ushered in the Great Oxygenation Event roughly 2.4 billion years ago, fundamentally altering Earth’s atmosphere and enabling oxygen-dependent fauna. Similarly, terrestrial vegetation influenced weathering processes and climate regulation. Together, these examples demonstrate that Earth system engineering is not novel but rather an intrinsic feature of life’s evolution on the planet.

Humans, however, introduce complexities that are distinct from previous engineering episodes. Whereas earlier biological impacts unfolded gradually through natural evolutionary timescales, anthropogenic forcing has accelerated environmental transformations dramatically within centuries. The combined effects of land use alteration, greenhouse gas emissions, and biodiversity engineering pose novel challenges for interpreting and managing Earth’s future within this framework.

Ultimately, the Earth system engineering framework represents a paradigm shift in environmental science and evolutionary biology. By providing a language and structure to analyze planetary-scale biological influences, it empowers researchers to better decipher the biosphere’s past and project its future. As this framework gains traction, it promises to unify disparate strands of science while emphasizing the crucial role of living organisms as architects of Earth’s dynamic system.

Subject of Research: Animals

Article Title: ‘Earth system engineers’ and the cumulative impact of organisms in deep time

News Publication Date: 23-Sep-2025

Web References:
https://doi.org/10.1016/j.tree.2025.08.005

Keywords: Earth system engineering, ecosystem engineering, planetary ecology, biosphere, evolutionary biology, climate change, biodiversity, photosynthesis, fossil record, human impact, deep time, environmental transformation