Articles tagged with Animal Dispersal
A study found that yellow-morph green sea turtles in the Galápagos prefer to stay in shallow coastal waters and rarely venture far from a single island. The turtles' home ranges varied greatly, but most preferred to stay within 1,498 sq km of their starting point.
A new study by Bournemouth University found that 'pioneering pairs' of ospreys, which nest away from others, are key to driving population recovery. These birds create separate subpopulations and increase the speed of recovery for the species through long-distance dispersal.
Researchers at Göttingen University found that virtual fences lead to a more even distribution of animals across the pasture and reduced movement near edges. Virtual fences also elicit similar behavior from cattle as conventional electric fences.
A study found that mountain lion visits to a small preserve led to changes in deer activity, vegetation growth, and the presence of smaller predators like coyotes and foxes. This 'ecology of fear' demonstrates the ripple effects of apex predators on ecosystems.
Researchers found that trematode parasites are more abundant in cooler temperate waters, defying the typical pattern of higher biodiversity near the equator. Temperature and host mobility play a major role in shaping parasite distributions, with certain species thriving in areas where hosts can tolerate infections better.
A global study finds zoantharians, colorful hexacorals, exhibit surprisingly narrow genetic and morphological divergence between oceans. Their ability to disperse via epic larval phases and raft across ocean basins may be key to their success.
A study led by Dr. Frédérik Saltré suggests that sterilizing 22% of adult females annually could stabilize the population at an estimated cost of $34 million over 25 years. This approach prioritizes both animal welfare and ecosystem health, offering a humane solution to the unsustainable koala numbers.
A new study traces the transformation of mammal communities across six continents over 50,000 years, finding that farming and hunting reshaped ecosystems. Only a handful of domesticated species, including cattle and horses, spread globally, altering native mammal populations.
The decline of seed-dispersing animals, including birds and mammals, hinders the fight against climate change by altering forest composition and reducing carbon absorption. Researchers warn that major global efforts underestimate the importance of frugivores in conservation and restoration strategies.
A new study found that a wildfire and drought led to an increase in jaguar population density in the Brazilian wetlands. The site, which is home to a unique population of jaguars with aquatic diets, may serve as a climate refuge, buffering extreme climate events.
Fiji iguanas are most closely related to North American desert iguanas, with a lineage that split around 30 million years ago. The animals likely colonized the Pacific islands after volcanic activity produced land, and their arrival coincided with the formation of Fiji.
Research found that 14% of Ecuadorian Amazon tree species are critically endangered, while 47% are endangered, primarily due to declines in animal species that disperse their fruits. The study highlights the importance of incorporating ecological traits into extinction risk estimates.
Research from Washington University in St. Louis found that bird wing shape is a key factor shaping biodiversity patterns on islands worldwide. The study revealed how birds' dispersal abilities influence the number of species found on islands, with low-dispersal birds leading to steep species-area relationships.
A recent study reveals that non-native ant species have profoundly altered the historical distributions of ant species, reshaping global ecosystems. The study found that just 2% of ant movements are sufficient to erode established borders and redraw the distribution map for this diverse array of insects.
A recent study at The Hebrew University of Jerusalem documented a groundbreaking observation of phoresy involving a myrmecophile pseudoscorpion on a myrmecophile scorpion. The study reveals the first recorded instance of this symbiotic relationship, where the pseudoscorpion attaches to the scorpion for dispersal into new environments.
A new study published in PLOS ONE reveals the earliest known fossil of the modern European common hippopotamus, dating back to the Middle Pleistocene period. The analysis of a fossil skull from Italy confirms the identity of the species and provides insights into its dispersal history.
Fossil discoveries in northern Panama Canal area suggest that marine species interchange persisted across shallow waters during the final stages of formation of the isthmus. The findings provide new insights into the connectivity between the Pacific and Caribbean marine faunas during this period.
Researchers have developed a battery-free GPS tracker that harnesses kinetic energy from an animal's movements, allowing for longer-term tracking. The 'KineFox' device has been tested on several species, including horses and dogs, and shows promise for monitoring endangered species.
A study by OSU researchers found that tropical forest birds with shorter, round wings are more susceptible to habitat fragmentation due to their limited dispersal abilities. This is in contrast to temperate forest birds with longer, narrower wings, which are better equipped for long-distance flight.
Current measures to protect grasslands in the Qinghai-Tibetan Plateau are damaging the ecosystem and should be stopped. Small burrowing mammals, like the plateau pika and zokor, play crucial ecological roles in maintaining ecosystem health and biodiversity.
Climate change poses a significant threat to southwestern US reptile and amphibian populations, with limited-dispersal species facing the greatest vulnerability. The study suggests that prioritizing conservation efforts for these species may be crucial to mitigating habitat loss.
A new study found that small mammals can serve as reservoirs for fungi that cause lung infections in humans. The researchers detected fungal pathogens in the lung tissues of rodents from areas with high rates of disease.
A study found that large mammals and birds essential for seed dispersal in the Atlantic Rainforest are disappearing due to deforestation. In contrast, smaller animals have lower interaction levels with plants.
Researchers found that livestock grazing had no negative impact on snow leopard distribution or density, and the species can coexist due to their separate ecological niches. The study suggests a more nuanced approach to conservation and land use, prioritizing the preservation of rocky mosaics.
A new study finds that large wild animals like elephants and whales can help restore ecosystems and battle climate change by dispersing seeds, clearing vegetation, and increasing albedo. Protecting these animals also supports local biodiversity and ecological resilience in temperate, tropical, and subtropical grassland ecosystems.
A study by Brazilian researchers found that these large mammals help regulate plant diversity, productivity, and biomass in understory areas. The spatial structure of plant communities is also influenced, with the Jussara palm playing a key role in attracting animals and dispersing seeds.
A study finds that crickets and camel crickets help disperse the seeds of the early-diverging orchid Apostasia nipponica. This mutualistic relationship allows both species to benefit from the association, with the insects obtaining nutrients from the pulp and the orchid achieving long-distance seed dispersal.
The study found that human disturbance increased the proportion of trees with seeds dispersed by animals, leading to a shift towards small-seeded species. These changes could have long-term implications for carbon storage and drought sensitivity in tropical forests.
The white-lipped peccary population in Central America has declined by up to 87%, with current IUCN estimates severely underestimating the actual decline. The species plays a critical ecological role and is highly vulnerable to human influence and forest loss.
Tropical forests depend on animals for seed dispersal to store carbon, but this role differs across regions. Large animal losses lead to fewer large trees and increased carbon loss in some forests.
Research suggests that if males traveling from far-off areas are less attractive to females, connectivity between populations can be greatly reduced. This finding has significant implications for conservation efforts, highlighting the need for better understanding of animal dispersal and habitat fragmentation.
Researchers found that conifer species that independently evolved whirling, or autorotating, seeds settled on only one optimal single-winged design after millions of years of evolution. This design provides enhanced dispersal efficiency, especially during the Permian Period when seed dispersal by animals was virtually absent.
Researchers at University of Toronto Scarborough discovered a genetic link between feeding behavior and animal dispersal, finding that active foragers disperse farther than less active ones. This study sheds light on the relationship between feeding activity and dispersal tendencies in nature, with implications for conservation efforts.
A new study suggests that ancient cycad lineage is pre-adapted to grow in groves, potentially relying on the extinct megafauna dispersal mechanism. Cycads are found in highly clumped, dense populations, with limited seed dispersal, suggesting they may be maladapted to current dispersers.
Researchers found that Eastern Bluebirds were 31% more likely to be found in connected patches, while seeds from wax myrtle plants were 37% more likely to be found in traps. The study showed a 'tight fit' between predictions and actual seed movement.