Sentence examples for declines in numbers from inspiring English sources

However, Ellis – although acknowledging the difficulties facing the project's scientists – accepted that perfecting the methods for saving the northern white could help other species, in particular the Sumatran and Javan rhinos, which are also suffering precipitous declines in numbers.

If a population has an intrinsic rate of natural increase of zero, then it is said to have a stable age distribution and neither grows nor declines in numbers.

Rich Hearn, the Wildfowl and Wetlands Trust's head of species monitoring, said: "The inclusion of wintering waterbirds on the red list for the first time due to severe declines in numbers highlights an increasingly widespread phenomenon, that of climate change-driven shifts in distribution.

The team found that dramatic declines in numbers among birds of prey were primarily a result of egg-shell thinning caused by pesticides, and that species were under threat of extermination because their eggs were structurally too weak to survive in the nest.

The study, using data collected from the public by the frog mortality project and charity Froglife, showed long-term declines in numbers because of the virus – as well as the sudden mass die-offs of frogs which the disease is known to cause.

Climate change, disease and increased use of pesticides have been blamed as factors in dramatic declines in numbers of bee colonies worldwide — by more than half in 20 years in the case of Britain, according to a recent study by Friends of the Earth, the environmental lobby organization.

Such a decline in numbers will particularly affect Crete.

All contribute to the continuing decline in numbers.

The khaps are declining in numbers, Mr. Chautala added.

Once-common species such as lapwings, yellow wagtails, skylarks and kestrels have declined in numbers.

Today that has fallen to 0.2%, a 95% decline in numbers.