All articles tagged with #ecology
If humans disappeared, Earth would reorganize with certain species gaining advantages. Birds—especially corvids and parrots—show high problem-solving and could rise to prominence, while adaptable mammals like rats or feral cats and dogs might thrive briefly. Primates and large marine mammals face cognitive or physical constraints, and there is no single species poised to fully replace humans as the dominant force on the planet.
Driver ants form nomadic colonies that can exceed a million workers and hunt almost continuously because they cannot store food; raiding parties are led by soldiers with oversized heads and scissor-like mandibles that dismantle prey from insects to small vertebrates, and their aggressive foraging can even threaten humans.
A newly described Ecuadorian Amazon spider, Taczanowskia waska, mimics the fruiting bodies of a parasitic fungus to avoid detection and ambush prey, a discovery aided by citizen science and published in Zootaxa, highlighting striking inter-kingdom mimicry in orb-weavers.
A Live Science feature by Sophie Berdugo outlines how humans and domesticated cats evolved from a mutual pest-control partnership into a more complex, sometimes asymmetrical relationship. Tracing cats to African wildcats and their spread with agriculture, the piece argues that while early cats helped curb rodents in small settlements, their role in large grain stores likely diminished, prompting a broader rethink of what mutualism means and what a cat is in our shared ecological story.
Researchers studying Amazonian cicadas found that their mud towers protect underground nymphs from predators and help regulate air flow during metamorphosis, effectively making the towers an extended phenotype that boosts survival; experiments showing predator avoidance and airflow disruption also found tower size influences recovery, reframing the towers as purposeful biology rather than mere dirt (Biotropica).
Scientists say stressed plants emit ultrasonic noises—clicks and pops inaudible to humans. A 2023 Cell study led by Lilach Hadany at Tel Aviv University found dehydrated tomato and tobacco plants averaged about 40 clicks per hour, with sounds detectable from over a meter away, suggesting a potential sound-based form of plant communication that could influence nearby insects and animals; cavitation is a likely source, though other mechanisms are being explored, along with how these sounds operate in natural environments.
A PeerJ study analyzing 17 Tyrannosaurus rex specimens with advanced imaging of leg bones finds growth to full size took about 40 years, far longer than the previous 25-year estimate, reshaping our understanding of T. rex development, its ecological roles, and prompting talk of possible separate species like Nanotyrannus.
Pixar’s Hoppers uses a beaver-centered cast and a determined heroine to deliver a timely fable about habitat protection and coexistence, blending authentic animal behavior with witty humor and a science edge; it’s charming and thought-provoking, though not as epoch-making as Pixar’s earliest films.
University of Georgia researchers found that white-tailed deer rubs and ground scrapes glow under ultraviolet light (365 and 395 nm), suggesting deer may communicate using UV-visible ‘signposts’ in the forest. Irradiance measurements showed these spots were brighter than the surroundings, though whether the glow comes from deer secretions, plant compounds, or both remains unclear. The study analyzed 109 rubs and 37 scrapes in a Whitehall Forest during two fall surveys in 2024, and the findings point to a possible new form of deer communication, published in Ecology and Evolution.
A review of 503 cannibalism reports across 207 snake species finds that cannibalistic behavior has evolved independently at least 11 times. The behavior appears across continents and contexts, often linked to environmental stress or scarce food, with many captivity cases; jaw flexibility and dietary generalism help some snakes consume conspecifics. Researchers say cannibalism can provide ecological fitness as an opportunistic feeding strategy, though much of the data are anecdotal and more study is needed.
Researchers opened decades-old Alaska salmon cans (1979–2021) and found anisakid worms; the parasites’ increasing numbers in pink and chum salmon trace a healthy, functioning marine food web and ecosystem recovery, with humans kept safe by the canning process.
Truffles, underground fruiting bodies of fungi, cannot release spores into the air. Instead they rely on animals eating them and transporting the spores through digestion, depositing them elsewhere and enabling the fungi to spread across ecosystems.
Researchers describe a three-way symbiosis in the Amazon between the shrub Hirtella physophora, the ant Allomerus decemarticulatus, and a cultivated fungus. The ants fashion a trap by cutting plant hairs and using fungal adhesive to build a stem platform with pores, where they ambush prey much larger than themselves; crickets are overcome and consumed. The plant gains defense and sugar rewards; the ants get prey, and the fungus feeds on waste, making a rare win-win-win interaction.
A global synthesis of 491 primate species finds that same-sex sexual behavior (SSB) is widespread and its occurrence is driven by both environmental pressures (drier habitats, food scarcity, predation) and social factors (larger sexual dimorphism, longer lifespans, more complex hierarchies). Structural equation modelling suggests environmental and life-history traits affect SSB mainly indirectly, while social complexity directly promotes it, highlighting SSB as a context-dependent trait shaping primate evolution and sexual diversity.
Springtails (Collembola) are tiny, ancient invertebrates found in virtually every habitat on Earth—from Mount Everest to Antarctica and even homes. They use a spring-loaded furcula to leap and a moisture-absorbing collophore to survive desiccation. As key players in regulating bacteria and fungi and in breaking down organic matter, they sustain ecosystems across forests, deserts, caves, and more. Giant springtails living in rotting wood can reach up to 17 mm, and recent work reshapes their classification, revealing a southern-hemisphere split tied to Gondwanan history, while warming and drying climates threaten many populations in Australia and New Zealand—a silent mass extinction for these remarkable yet underappreciated creatures.