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Related Concept Videos

What is Biodiversity?01:19

What is Biodiversity?

Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
Threats to Biodiversity01:50

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
Biodiversity and Human Values01:24

Biodiversity and Human Values

Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.
What is Conservation Biology?01:57

What is Conservation Biology?

Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
Conservation of Small Populations02:04

Conservation of Small Populations

Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less likely to...
Habitat Fragmentation02:31

Habitat Fragmentation

Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.

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Deploying Community Scientists to Conduct Nondestructive Genetic Sampling of Rare Butterfly Populations
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Human population in the biodiversity hotspots.

R P Cincotta1, J Wisnewski, R Engelman

  • 1Research Department, Population Action International, Washington, DC 20036, USA. cincotta@popact.org

Nature
|May 9, 2000
PubMed
Summary

Biodiversity hotspots, rich in endemic species, host nearly 20% of the global population. High population growth rates in these areas threaten conservation efforts.

Area of Science:

  • Ecology
  • Conservation Biology
  • Demography

Background:

  • Biodiversity hotspots are critical for conservation due to high species richness and endemism.
  • Human population dynamics in these vulnerable areas are not well understood.
  • Understanding human impact is crucial for effective biodiversity conservation strategies.

Purpose of the Study:

  • To quantify human population dynamics in 25 global biodiversity hotspots.
  • To assess population growth rates and their implications for conservation.
  • To analyze the role of demographic change in biodiversity loss.

Main Methods:

  • Estimation of key demographic variables for biodiversity hotspots.
  • Analysis of population data from 1995 and growth rates from 1995-2000.

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  • Comparison of hotspot population growth with global and developing country rates.

    • Main Results:

    • In 1995, over 1.1 billion people (nearly 20% of the world population) lived in biodiversity hotspots.
    • Hotspots experienced a population growth rate of 1.8% annually (1995-2000), exceeding global and developing country averages.
    • These demographic trends indicate continued human-induced environmental changes in hotspots.

    Conclusions:

    • Demographic change is a significant factor in global biodiversity conservation.
    • High population growth in hotspots exacerbates threats to endemic species.
    • Global fertility declines and migration policies may influence conservation outcomes.