A global analysis of 239 tree species reveals that biomass allocation among leaves, stems, and roots follows a universal scaling pattern as trees grow larger, consistently shifting investment from leaves to stems. However, this fixed rule is finely modulated by local environment and evolutionary history. Angiosperms primarily adjust their allocation based on soil conditions, while gymnosperms respond most strongly to temperature. The findings published in Forest Ecosystems integrate two competing ecological theories, allometric partitioning theory (APT) and optimal partitioning theory (OPT), showing that trees operate with a built-in rule that is dynamically optimized for their habitat.

In a groundbreaking study, researchers have explored how Swedish non-industrial private forest (NIPF) owners are pioneering clearcut-free forestry as a sustainable alternative to conventional timber-focused practices. The research highlights the growing trend among private forest owners to prioritize biodiversity, ecological resilience, and cultural values alongside timber production.

A new study in Forest Ecosystems shows that the 2021 White Rock Lake Wildfire in the southern interior of British Columbia, Canada increased summer low flows in snow-dominated watersheds by reducing evapotranspiration and altering how snowmelt and groundwater contribute to streamflow. Using hydrometric monitoring and geochemical tracing, researchers found that reduced forest cover lowered evapotranspiration, allowing more snowmelt to recharge groundwater and sustain streams through the dry season. The increase in water supply is likely temporary, however, as forest regrowth will gradually increase water consumption, highlighting the need for long-term monitoring to guide post-fire water management under climate change.

A new study models how climate change could affect the future distribution of tree species across North America. The researcher analyzed 442 species found in Mexico and neighboring regions and found that suitable climate for many trees is likely to shift northward by several hundred kilometers by the end of the century. While most Mexican tree species are expected to retain some suitable climate within Mexico, many may also find suitable conditions in the United States and Canada. Species with wide ranges and those growing at lower elevations are more likely to expand, while species with small ranges, high-elevation habitats, or restricted to Mexico may lose suitable areas. The study suggests that forest ecosystems may lag behind climate change, as many species already have suitable climate in new regions but have not yet moved there.

A deep genetic mystery has baffled plant scientists for decades. Although leaves, stems, and flowers develop in strikingly similar ways across many plant species, scientists have struggled to identify the shared DNA instructions that guide their formation. A new study now uncovers this hidden regulatory code and shows that its core has been conserved for 300 million years of plant evolution. Remarkably, these ancient DNA sequences were hidden in plain sight but were obscured by the constant reshuffling and duplication of plant genomes. By uncovering this deep-time blueprint, the research reshapes our understanding of plant evolution, showing how core regulatory logic is preserved and modified to guide the diversity of plant shapes and forms. The findings also carry important implications for agriculture, where fine-tuning gene regulation, rather than altering genes themselves, opens new paths to developing more resilient and productive crops.

In areas where freshwater is scarce, farmers often turn to treated wastewater to irrigate crops despite concerns from some regulators and consumers about exposing food to compounds routinely found in wastewater, including many psychoactive medications that treat mental disorders. But new research from Johns Hopkins University has found that certain crops—tomatoes, carrots, and lettuce—store those chemicals in their leaves. This may be good news for tomato and carrot lovers who eat the fruit and roots of those vegetables, respectively.