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Concept in human demographics
Population decline, also known as depopulation, is a reduction in a human population size. Earth's total human population continues to grow, as it has
Population_decline
Ecological trend recorded since the late 20th century
animal species. In the 2010s, reports emerged about the widespread decline in populations across multiple insect orders. The reported severity shocked many
Decline_in_insect_populations
Ongoing mass extinction of amphibian species worldwide
Since the 1980s, decreases in amphibian populations, including population decline and localized mass extinctions, have been observed in locations all
Decline in amphibian populations
Decline_in_amphibian_populations
Population decrease of Whites proportionate to the total population
White demographic decline is a decrease in the white populace numerically or as a percentage of the total population in a city, state, subregion, or nation
White_demographic_decline
Demographic statistical analysis
Population decline has many potential effects on individual and national economy. The single best gauge of economic success is growth in GDP per capita
Economic consequences of population decline
Economic_consequences_of_population_decline
Estimated global human population
that the world population, 8 billion as of 2023[update], would peak around the year 2084 at about 10.3 billion, and then start a slow decline, assuming a
Human_population_projections
trends resulted in the decline of Japan's population after reaching a peak of 128.1 million in October 2008. In 2014, Japan's population was estimated to be
Aging_of_Japan
stagnation or population decline. Ontario and Quebec were always the two most populous provinces in Canada, with over 60 percent of the population at any given
Population of Canada by province and territory
Population_of_Canada_by_province_and_territory
Total number of living humans on Earth
The growth rate declined to 1.1% between 2015 and 2020 and is projected to decline further in the 21st century. The global population is still increasing
World_population
Ongoing demographic trend
fertility rate of the United States has declined below replacement level, prompting projections of an aging population and workforce, as is already happening
Aging_of_the_United_States
Problem in demographic economics
(sometimes combined with other population factors like higher emigration than immigration) to have population decline, which are South Korea, China, Japan
Sub-replacement_fertility
famine, mass population displacement, and falling birth rates caused by these disruptions, the atrocities contributed to a sharp decline in the Congolese
Atrocities in the Congo Free State
Atrocities_in_the_Congo_Free_State
Increasing median age in a population
long-term decline in fertility rates and a decline in mortality rates. Most countries now have declining mortality rates and an ageing population: trends
Population_ageing
Urban decay of Detroit from 1950s to 2010s
a major economic and demographic decline that began in the mid 20th century and lasted for decades. The population of the city fell from a high of 1
Decline_of_Detroit
Fall of a complex human society
natural catastrophe, war, pestilence, famine, economic collapse, population decline or overshoot, incompetent leaders, and sabotage by rival civilizations
Societal_collapse
Prehistoric collapse in human populations
The Neolithic decline was a rapid collapse in populations between about 3450 and 3000 BCE during the Neolithic period in western Eurasia. The specific
Neolithic_decline
the population increased by 5.6 million, equivalent to 20.4 per cent overall growth. In 2026, the country has experienced a population decline for the
Population_of_Canada
The phenomenon of the Zoroastrian population decline has garnered considerable attention and discussion within academia, literature, and journalism.[excessive
Zoroastrian population decline
Zoroastrian_population_decline
two countries: India and Iran. These numbers indicated a notable population decline in comparison with the earlier projection of 124,953 people. Besides
List of countries by Zoroastrian population
List_of_countries_by_Zoroastrian_population
Sociological process affecting cities
phenomena, which can include: Industrialization Deindustrialization Population decline (underutilization of services) or overpopulation (placing excessive
Urban_decay
South Korea's dramatic decline in fertility, in 2020 the country recorded more deaths than births, resulting in a population decline for the first time since
Demographics_of_South_Korea
Ukrainian-controlled areas may have decreased to 28 million, a steep decline from Ukraine's 2020 population of almost 42 million. This drop is in large part due to
Demographics_of_Ukraine
slaves, grew steadily, the Indigenous population plummeted. There are numerous reasons for the population decline, including exposure to Eurasian diseases
Population history of the Indigenous peoples of the Americas
Population_history_of_the_Indigenous_peoples_of_the_Americas
Neologism referring to falling fertility rates
geographic regions expected to decline in population in the coming years. Europe's population is forecast to decline by nearly 70 million people by 2050
Birth_dearth
than 20 percent of the population of Japan were aged 65 and over. Many reasons are behind the decline, including the declining birthrates, and the ratio
Demographics_of_Japan
Ecological trend
The decline of wild mammal populations globally has been an occurrence spanning over the past 50,000 years, at the same time as the populations of humans
Decline in wild mammal populations
Decline_in_wild_mammal_populations
Genus of reptiles
lizard put on the endangered species list due to the massive decline of its population in Oklahoma, where it was once plentiful. The center said it may
Horned_lizard
Increase in the number of individuals in a population
due to sharp declines in global birth rates. Others have challenged many recent population projections as having underestimated population growth. The
Population_growth
War between British colonists and Aboriginal Tasmanians (1824–1832)
cause of Aboriginal population decline before the Black War. Clements believes that frontier violence does not explain population decline in the first 20
Black_War
Aspect of apiculture
(to sustain food resources). Where honeybee populations decline, there is also a decline in plant populations. In agriculture, some plants are completely
Colony_collapse_disorder
Sharp reduction in the size of a population
the human ancestral species approximately 900,000 years ago. The population declined from roughly "100,000 to 1,000 individuals", with such conditions
Population_bottleneck
Measurement of population size per unit area or unit volume
Idealised population List of population concern organizations Population dynamics Population decline Population growth Population genetics Population health
Population_density
Tiger population in Southern China
The South China tiger is a population of the Panthera tigris tigris subspecies that is native to southern China. The population mainly inhabited the Fujian
South_China_tiger
Ireland population declined, it recovered by the beginning of the 20th century. This prolonged period of emigration and net population decline in Irish
Demographics of the United Kingdom
Demographics_of_the_United_Kingdom
Informal group of birds
medicine) account for roughly 90% of the population declines. And because vultures are scavengers, their population decline can have cultural, public health,
Old_World_vulture
Genus of crabs
the most drastic decline in Bering Sea snow crab populations, decreasing from 11.7 billion in 2018 to 1.9 billion in 2022 (a decline of approximately
Chionoecetes
1840s northern European food crisis
million deaths, up to two million refugees, and spurring a century-long population decline. Excluding Ireland, the death toll from the crisis is estimated to
European_potato_failure
Common name for a type of bird
example, the decline of vulture populations can lead to increased disease transmission and resource damage, through increased populations of disease vector
Vulture
Sudden population decline in Russia
Demographic Crisis: Dimensions, Causes, Implications (NBR Project Report, May 2010) Russia's Demographic Decline Continues // Population Reference Bureau
Russian_cross_(demography)
Bornean orangutans decreased by over 100,000. The primary reason for population decline is habitat loss as a result of the unsustainable practice of timber
Endangerment_of_orangutans
British Overseas Territory in the South Pacific
decline in ship traffic, which severely affected the island's economy. There was a mass exodus of residents in the early 1960s, with the population dropping
Pitcairn_Islands
Species of bird
sparrow population has been on the decline in many Asian countries, particularly in India. Various causes for the dramatic decreases in population have been
House_sparrow
Overview of aging in South Korea
decrease. In 2021, this culminated in South Korea experiencing a natural population decline for the first time in its history. Analysts state that South Korea's
Aging_of_South_Korea
City in Michigan, United States
Rapids' population peaked in the 1980s. Since the 1980s, Big Rapids has lost over 46% of its population. There are a number of reasons for the decline, one
Big_Rapids,_Michigan
cities here would have their first ever population drop in 1940. Though slight, they would presage a precipitous decline that started in 1950. The 1940 census
List of most populous cities in the United States by decade
List_of_most_populous_cities_in_the_United_States_by_decade
quality-of-life indices for Estonia indicate a modern industrial state. The population declined annually from 1991 until 2016, except for a brief pause in 2010.
Demographics_of_Estonia
Idea about population growth and food supply
point of triggering a population decline. This event, called a Malthusian catastrophe (also known as a Malthusian trap, population trap,[citation needed]
Malthusianism
Population neither growing nor declining
neither grows nor declines; that is, the number of births plus in-migrants equals the number of deaths plus out-migrants. The Zero Population Growth organization
Zero_population_growth
Species of fish
damaging the native gene pool through introgression. Populations have been in steady decline for decades. In 1978, the Golden Trout Wilderness was established
Golden_trout
Species of mammal
lynx population declined in the 20th century primarily due to overhunting, poaching, fragmentation of suitable habitats, and the population decline of its
Iberian_lynx
Species of vulture
Critically Endangered on the IUCN Red List since 2002, as the population has severely declined during the Indian vulture crisis. It is estimated that there
Indian_vulture
Aging population of Russia
The demographic crisis in Russia refers to the aging and decline of the Russian population caused by demographic transition and other factors. Although
Aging_of_Russia
Capital and largest city of New Caledonia
Metropolitan France. As a result, the April 2025 census recorded a marked population decline for Nouméa, with only 173,814 inhabitants living in the metropolitan
Nouméa
and Spain. (In fact, with its low birth rate, stagnating or declining native-born population, and role as a destination for migrants from other parts of
Demographics_of_France
Hindu population has tripled from 303,675,084 in 1951 to 966,257,353 in 2011, but the Hindu percentage share of total population has declined from 84
Hinduism_in_India
End of the human species
omnicide, refers to the possible ending of the human species, either by population decline due to singular natural events—for example, space irradiation, asteroid
Human_extinction
Subspecies of owl found in North America
species, the northern spotted owl remains threatened due to continued population decline from human-caused habitat destruction and competition with invasive
Northern_spotted_owl
Species of mammal
short lifespan and slow population increase rate of the species, Hector's dolphin populations are vulnerable and at risk of decline. The species' range includes
Hector's_dolphin
Indigenous people in the Andaman Islands
the tribes, recruiting them to capture escaped convicts. Populations went into sharp decline due to outside diseases. Outside infectious diseases, to
Great_Andamanese_peoples
Species of bird
meadow on Texel National surveys in England and Wales have shown a decline in the population between 1987 and 1998. Since 2009, the northern lapwing has had
Northern_lapwing
City in Michigan, United States
industry and strong manufacturing presence declined, leading to increased unemployment, crime, and a population decline. Modern economic development is focused
Saginaw,_Michigan
Non-profit ornithological organization
that approximately 500–1,400 whooping cranes existed in 1860. Their population declined because of hunting and habitat loss until 1941 when the last migrating
Operation_Migration
Species of bird
confirmed the population decline. The blue-footed booby population appears to be having trouble breeding, thus is slowly declining. The decline is feared
Blue-footed_booby
Third largest of the Crozet Islands
Bouard, Fabrice Le; Ryan, Peter G.; Bost, C. A. (August 2018). "Massive decline of the world's largest king penguin colony at Ile aux Cochons, Crozet"
Île_aux_Cochons
2011, twenty-four CAs experienced population decline. The fifteen CAs that experienced the greatest population decline were located in British Columbia
List of census metropolitan areas and agglomerations in Canada
List_of_census_metropolitan_areas_and_agglomerations_in_Canada
Species of bird
IUCN with no population recovery plan in place. The current wild population is composed of roughly 23,800 mature individuals and is declining. It is a migrant
Humboldt_penguin
approximate population of 4169. This village is the only Japanese municipality in this decade to contradict the national population decline in Japan. The
2000s_in_Japan
Shift from high to low birth rates
education of children; and other social changes. Population growth begins to level off. The birth-rate decline in developed countries started in the late 19th
Demographic_transition
American demographer (born 1944)
co-editor); Population and Resources in Western Intellectual Traditions (Cambridge University Press, 1989, co-editor); The Fear of Population Decline (Academic
Michael_Teitelbaum
Phenomenon in which populations temporarily exceed carrying capacity of environment
sustainable population and what we currently have. Excessive demand leading to overshoot is driven by both consumption and population. Population decline due
Overshoot_(population)
A decline of Christian affiliation in the Western world has been observed in the decades since the end of World War II (1939–1945). While most countries
Decline of Christianity in the Western world
Decline_of_Christianity_in_the_Western_world
Sociological tendency
to grow even if the fertility rate declines or continues to decline even if the fertility rate grows. Population momentum occurs because it is not only
Population_momentum
Species of marine mammal
it being legally protected in many countries, the main causes of population decline remain anthropogenic and include fishing-related fatalities, habitat
Dugong
17th-century Spanish mission in Baja California Sur, Mexico
came to an end in 1829, by which time the native population throughout Baja California had declined "to the point of near extinction." By the end of 1698
Misión de Nuestra Señora de Loreto Conchó
Misión_de_Nuestra_Señora_de_Loreto_Conchó
Idea that the United States is diminishing in power
American decline is the idea that the United States is diminishing in power on a relative basis geopolitically, militarily, financially, economically
American_decline
Species of cephalopod
closed in 2014. The population continued its decline, reaching the lowest numbers on record in 2013. In 2014, the cuttlefish population showed first signs
Giant_cuttlefish
Species of bee
ruderatus into Chile to serve as commercial pollinators. B. dahlbomii population decline can also be attributed to the pathogen spillover of the parasitic
Bombus_dahlbomii
2025 nonfiction book by Dean Spears and Michael Geruso
decline in fertility rates and its potential consequences for society, material progress, and environmental sustainability. Global human population growth
After_the_Spike
Endangered species of fish
human-related threats that contributed to its population decline. Although the totoaba population has declined due to nearly 50 years of overfishing, they
Totoaba
Species of amphibian
approximately 25 individuals remaining in the wild. Before this sharp decline in population, the Wyoming toad was commonly found in the floodplains, ponds,
Wyoming_toad
Species of reptile
range to decline. The population in the wild was about 1,000 in the 1970s, decreased to below 130 in 2001, and grew after 2003, with its population being
Chinese_alligator
Belief that promotes human reproduction
French: nataliste, formed from French: natalité, birthrate. As a population decline is observed in many countries associated with ageing and cultural
Natalism
Species of amphibian
central French Guiana. Reasons for Decline in Population Deforestation and disease are the main causes for population decline in recent years. Because French
Atelopus_barbotini
2019 was 1.40005 billion. If true, this would indicate the first population decline since the Great Leap Forward. On April 28, 2021, Bloomberg News, quoting
2020_Chinese_census
Uninhabited islands off the west coast of County Kerry, Ireland
last island to hold a significant population, Great Blasket Island, was abandoned in 1954 due to population decline and is best known for a number of
Blasket_Islands
Native American people of California
trade-related violence with the Mojave as a key factor in the decline and dispersion of Vanyume populations. These conflicts likely occurred around the 1830s. Some
Vanyume
IUCN conservation category
mature individuals C) Population estimated to number fewer than 250 mature individuals and either: 1. An estimated continuing decline of at least 25% within
Critically_endangered
Species of some organisms facing a very high risk of extinction
one or more criteria for a declining population and diminished geographic distribution; for example, when a species population is reduced by 20% within
Endangered_species
Volcanic supereruption 74,000 years ago in Indonesia
this local population. However, another site in India, the Middle Son Valley (in Madhya Pradesh), exhibits evidence of a major population decline and it has
Youngest_Toba_eruption
Canadian rock band
in 2010, before going on indefinite hiatus. The record, titled Population: Declining, was nominated for Rock Album of the Year at the 2011 Juno Awards
Hail_the_Villain
Ranking of cities in the U.S.
place. This list refers only to the population of individual municipalities within their defined limits; the populations of other municipalities considered
List of United States cities by population
List_of_United_States_cities_by_population
where a large working-age population can drive economic growth. However, the number of children is declining; the under-5 population peaked in 2007 and the
Demographics_of_India
Ecological crisis in Indian subcontinent
12,000, and 1,000 respectively). A major contributing factor in declining populations of vultures is believed to be the widespread use of drugs such as
Indian_vulture_crisis
Relationship between human population, environmental limits, and sustainability
importance of population size compared to other drivers of sustainability. Some researchers emphasize population stabilization or decline as one contributing
Sustainable_population
Whale excrement and its role in ocean ecology
orca) Population". PLOS ONE. 7 (6) e36842. Bibcode:2012PLoSO...736842A. doi:10.1371/journal.pone.0036842. PMC 3368900. PMID 22701560. "Causes of decline among
Whale_feces
County in North Carolina, United States
Bertie County has experienced significant population decline over the past 15 years. The estimated 2025 population for Bertie County is 16,543. This is a
Bertie_County,_North_Carolina
1968 book predicting worldwide famine
wager Moral panic Population decline The Decline of the West Z.P.G. Ehrlich, Paul R.; Howland Ehrlich, Anne (2009). "The Population Bomb Revisited" (PDF)
The_Population_Bomb
Indian population. While the national average for the sex ratio shows an increase from 933 in 2001 to 940 in 2011, the 2011 census shows a sharp decline in
List of states and union territories of India by population
List_of_states_and_union_territories_of_India_by_population
of Canadian municipalities with a peak population of 5,000 or more which have experienced a population decline of 5% or more. The three columns to the
List of Canadian municipalities having experienced population decreases
List_of_Canadian_municipalities_having_experienced_population_decreases
Vosges in Lorraine. See population decline for more information. In contrast the seven departments that have gained the most population in absolute value are
List of French departments by population
List_of_French_departments_by_population
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