Introduction Beneath the surface of almost every terrestrial ecosystem lies a hidden network that sustains plant life: mycorrhizal fungi. These symbiotic organisms form intimate associations with plant roots, extending far into the soil to facilitate nutrient and water exchange. Estimates suggest that 80–90% of vascular plants form mycorrhizal relationships, underscoring their centrality to global ecosystems. Beyond ecological importance, mycorrhizal networks are critical for

Introduction Urban Heat Islands (UHIs) refer to metropolitan areas experiencing significantly higher temperatures than surrounding rural or suburban regions. Average UHI temperature differences can range from 1°C to over 7°C depending on city size, building density, and land cover. With over 55% of the global population currently living in urban areas—and projections suggesting 68% by 2050—UHIs are increasingly critical for public health, energy management, and climate resili

Overview Ecosystems are structured not only by which species are present, but by how those species interact. Predators play a central role in regulating population size, behavior, and spatial distribution of prey. When these interactions are disrupted, ecosystems can shift into alternative states that are less stable and less diverse. Trophic downgrading refers to the degradation of ecosystem structure and function following the loss or weakening of predators across trophic l

Overview Wildlife population declines are often attributed to direct causes such as habitat destruction, poaching, or disease. However, chronic physiological stress is an underexamined factor that can suppress population growth without causing immediate mortality. Unlike acute stress, which can be adaptive, chronic stress alters endocrine function in ways that reduce long-term viability. Mechanisms of Chronic Stress In vertebrates, chronic stress is typically mediated by prol

Overview Marine snow refers to the continuous downward flux of organic and inorganic particulate matter through the ocean water column. It consists of microscopic debris produced in surface waters that sinks toward the deep ocean, transporting carbon and nutrients away from the atmosphere–ocean interface. Although largely invisible without specialized equipment, marine snow is a central component of the marine carbon cycle and a primary mechanism by which carbon is sequestere