'steep population decline' is a correct and usable phrase in written English.
You can use it to refer to when a population drops significantly in a short period of time. For example, "Despite conservation efforts, the species has experienced a steep population decline in the last decade."
That is so even though the country faces a steep population decline and keeping women sidelined has had economic costs.
Early snow melts caused by climate change could deliver a mighty one-two punch to the delicate Mormon fritillary butterfly, shrinking the insect's favored nectar supply, killing caterpillars and causing a steep population decline, a new study in the journal Ecology Letters finds.
Now, The Washington Post reports that archaeologists have found evidence of a steep population decline in eastern English towns in relatively mundane objects pottery shards.
It is threatened with extinction because of the steep population declines resulting from human interference in its native habitat, mainly from commercial fisheries and oil spills.
Using population data from 1985 to 2012 gathered on more than 1,000 sites across the country, scientists at the universities of Stirling and Sussex, in partnership with Butterfly Conservation and the Centre for Ecology and Hydrology, found that neonicotinoid use better explained steep population declines than other factors.
have been over-exploited leading to steep population declines.
We also conclude that some species suffered steep population declines as a result of the drought, with most, but not all, then recovering.
In North America, the loss of habitat heterogeneity resulting from homogeneous livestock grazing is one factor contributing to steep population declines of many grassland bird species.
As a result of these steep population declines and the ongoing threat from demersal fisheries, the IUCN has assessed the angelshark as Critically Endangered.
Recently, many yellow perch stocks have experienced poor recruitment, steep population declines, and reduced commercial catch (Marsden and Robillard 2004).
Simulation models predict population declines from even moderate levels of hunting in infanticidal species, and harvest data suggest that African countries and U.S. states with the highest intensity of sport hunting have shown the steepest population declines in African lions and cougars over the past 25 yrs.
