All articles tagged with #ecology
Camera-trap surveys in the Chernobyl Exclusion Zone reveal 11 mammal species—incl. Przewalski’s horses, Eurasian lynx and moose—are thriving in the largely human-free area, suggesting reduced disturbance supports wildlife even as scientists note the need for further study on lingering radioactivity effects.
Maldives investigators are developing a new explanation for the five Italian researchers who died during a dive into a deepwater cave, including the possibility that the group went far deeper than planned; only one body has been recovered, and authorities note cave diving as a high-risk discipline.
A new Ecology and Evolution study documents seven observations of remoras entering manta ray cloacal openings across three manta species worldwide, suggesting a parasitic twist to the remora–host relationship and prompting a reevaluation of how these symbioses function in the wild.
New research finds gray wolves in the Chernobyl Exclusion Zone are seven times more numerous than before the 1986 disaster, likely due to reduced human pressure, with other wildlife such as elk and deer also thriving. Evolutionary biologists from Princeton and the University of Portsmouth identified cancer-related genetic divergences in CEZ wolves—23 genes linked to multiple tumor types and signs of immune activity—based on RNA from blood samples and comparisons with Belarus and Yellowstone populations; the findings, presented at AACR 2024, suggest a possible cancer resistance in this isolated, war-surrounded ecosystem.
Forty years after the disaster, wildlife around the Chernobyl exclusion zone shows a mix of thriving populations and unusual traits. Some species have benefited from reduced human activity and habitat changes, while others exhibit notable features (e.g., darker tree frogs, altered forests, more wolves and bears). Scientists debate whether these changes are direct radiation adaptations or the result of environmental shifts and other factors, including transgenerational mutations and climate stress.
Researchers in southeastern Arizona documented an unprecedented interaction where small cone ants climb onto much larger harvester ants to lick and nibble their bodies, including inside open jaws. The grooming may benefit both species—cone ants could feed on tiny particles removed, while harvester ants gain cleaning in hard-to-reach areas. This first-recorded behavior, likened to cleaner fish in the ocean, was observed by Mark Moffett and described in Ecology and Evolution, highlighting how much remains to be learned from natural interactions.
The Conversation piece argues that headlines about radiation driving dramatic wildlife changes at Chernobyl are overstated; while some dog populations show genetic differences, these are more likely due to breed history, habitat, and disease than radiation. The broader point is that the exclusion zone’s ecosystems are shaped far more by the absence of humans, effectively turning parts of it into a nature reserve, than by radiation exposure. Long‑term health effects on people from the accident remain socio‑economic and mental health concerns, underscoring the need for careful science communication to curb misinformation.
A large Ecuador study shows tropical forests can regain animal life within about three decades, much faster than the traditional century-plus timeline. Using chronosequencing across 45 regrowing patches and 16 taxa, researchers found animal diversity nearing that of old-growth forests, aided by remnant trees and proximity to intact forests. However, about 30% of soil bacteria may be irreversibly lost and some highly specialized species haven’t returned. The findings highlight that conservation should leverage nearby old forests to maximize natural recovery, but do not justify ongoing deforestation.
Humans have become a dominant force reshaping Earth, delivering health and progress but also driving climate change, pollution, and biodiversity loss. The Anthropocene isn’t just a crisis—our social, cultural, and cooperative capacities, guided by strong institutions and Indigenous stewardship, can be harnessed to steer transformative, sustainable change for people and the planet.
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.