Articles tagged with Wild Populations
Killer whales have begun preying on sea otters in western Alaska, leading to a decline in sea otter populations and an increase in sea urchin numbers. This chain of events is linked to the collapse of seals and sea lions, which are the killer whales' usual prey.
Researchers found a near-100% loss of hatchlings due to predation and lack of migration between two forest preserves. The study suggests genetic isolation and potential extinction threats for the Illinois population.
A recent census reveals that Grauer's gorilla populations have remained stable despite growing human pressures, with 16,900 individuals estimated. However, local populations are increasingly threatened due to poaching and habitat loss, highlighting the need for continued support of conservation efforts.
The report examines residents' fears about wolf interactions with livestock, humans, and the native deer population. Despite these concerns, states with wolves have minimal livestock losses, highlighting a more nuanced understanding of wolf ecology.
A University of Georgia ecologist has estimated the relative importance of predation and plant quality on insect populations using time-series analysis. The study found that top-down forces regulate winter moth populations, while bottom-up forces dominate green oak leaf roller moth populations.
Researchers found that Conservation Reserve Program lands provide substantial breeding habitat for small grassland birds. The study suggests the program may be helping to stem decline in bird populations, with some species experiencing long-term population increases.
The Isle Royale moose population has declined significantly, with only about 500 remaining after a devastating winter. This decline is attributed to the island's moose being severely stressed from lack of food and deep snows, with an abundance of balsam fir browse providing limited sustenance.
A multiyear project may provide ecological insights for animal conservation, as tiny prairie voles adjusted to both immigration and emigration among different habitats to maintain a stable overall population. The study found that birth and death rates compensated for movement among habitats with varying environments.
Wild honeybee populations have collapsed due to a combination of factors, including harsh winters, wet springs, and blood-sucking mites. As a result, small and medium-sized fruit and vegetable growers will be hardest hit, leading to smaller yields and lower quality produce.