Articles tagged with Human Population Growth
A team of scientists, including Dr Paul Brotherton from the University of Huddersfield, investigated haplogroup H mitochondrial genomes from ancient human remains to understand modern European populations. The results show a significant population upheaval around 4,000 BC, potentially due to large-scale migration or growth.
Researchers examine the effects of human activity on land modification, finding over 50% of Earth's surface has been transformed. This transformation influences local and global food production, leading to concerns about planetary resources and population overshoot.
A study published in PLOS ONE finds that climate patterns are more correlated with population growth in the contiguous United States than income or urbanization. The researchers found a pronounced shift away from cool and seasonal climates towards warmer and drier areas, resulting in a six-fold temperature increase over the last century.
A CU-UCSC study finds that California condors continue to suffer from lead exposure, with nearly half of the population showing signs of poisoning. The research highlights the need for sustained human intervention to stabilize and grow the species' population.
Research suggests that a growing global population will significantly increase greenhouse gas emissions, contributing to environmental stress.
Researchers found that evolutionary changes in aphid populations led to rapid increases in population numbers, up to 42% faster than non-evolving populations. This rapid evolution has important implications for predicting pest densities and outbreaks in various applied areas.
A comprehensive assessment reveals that relying on protected areas is insufficient to address the ongoing global biodiversity crisis. The study highlights five key technical and practical limitations of this approach, including inadequate enforcement and insufficient funding.
The study found that female education is a key determinant of population growth, with more educated women having fewer children and better health outcomes. The authors suggest that concerted efforts to fast track education could help keep the global population below 9 billion by 2050.
Houston's population growth was the highest in the US, with a whopping 1.2 million new residents added over the past decade, outpacing New York and Chicago combined. The city's growth can be attributed to its proximity to Latin America, business-friendly policies, low cost of living, and significant job growth.
Research reveals that lone male black bears are the primary cause of fatal attacks on humans, with a significant increase in attacks linked to human population growth. The study also found that familiarization with humans and previous bear encounters do not necessarily lead to increased attack rates.
New research suggests prevention of unwanted births may be a larger factor in fertility decline in developing countries. Contraception's success has played a significant role, especially in low-income countries, where meeting unmet demand could reduce population growth by 250 million by 2050.
The growth of winter tourism in European mountain ranges is threatening the population of indigenous bird species, including the Capercaillie. A recent study found that Capercaillie droppings showed a marked increase in stress hormone levels closer to locations with winter recreation activity.
A new study finds that slowing population growth could significantly impact global carbon dioxide emissions, with urbanization and aging playing crucial roles. By mid-century, a slowdown in population growth could account for 16-29% of the emission reductions necessary to keep global temperatures from causing serious impacts.
A new study found that a slowing of population growth could contribute to reducing greenhouse gas emissions, with slower growth paths by 2050 accounting for 16-29% of necessary emissions reductions. Urbanization and aging also play significant roles in shaping future emissions.
New research from the University of New Hampshire found that rural areas with high unemployment rates are less likely to support environmental regulations. In contrast, areas with population growth and amenity-driven changes are more likely to favor conservation efforts. The study also reveals classic patterns in views on conservation,...
A genetic study has pinpointed the role of LIN28B in regulating height growth from birth to adulthood in a complex and sex-specific manner. The research found that two variants of the gene influence growth, with one having a more prominent effect on males.
A NOAA-funded project aims to protect a community by providing decision-support for implementation of stakeholder-driven adaptation. The study will develop a reliable, local-scale adaptation protocol to maintain historical flood protection levels.
Theoretical biologist Peter Turchin and ancient historian Walter Scheidel developed a mathematical model using coin hoards to project population dynamics before and after 100 BC. The model suggests that the Roman population declined after 100 BC, contradicting the 'high count' hypothesis of vigorous growth.
A recent Editorial in The Lancet emphasizes the connection between family planning, climate change, and women's health. Implementing contraception can help reduce unintended pregnancies and slow population growth, thereby alleviating demographic pressure on the environment.
A recent study by Oregon State University statisticians reveals that having one less child can significantly reduce an individual's carbon legacy and greenhouse gas impact. The research found that the average long-term carbon impact of a child born in the U.S. is more than 160 times greater than that of a child born in Bangladesh.
A new study finds that nature reserves in Africa and Latin America attract human settlement, with population growth near protected areas being nearly twice that of neighboring rural areas. The researchers attribute this to economic incentives provided through international aid and donor investment, which stimulate local economies.
A new underwater nursery in Biscayne National Park is dedicated to the propagation of staghorn corals. The nursery aims to develop effective fragmentation and propagation methodologies to help recover the species from decline due to climate change, coral diseases, and hurricanes.
A study by Cornell University finds that pollution from water, air and soil is responsible for 40% of global deaths, with malnutrition and disease susceptibility affecting 3.7 billion people worldwide. The researchers warn that the growing world population, combined with environmental degradation, are major causes behind human diseases.
A 160,000-year-old fossil found in Morocco reveals human growth patterns that are more similar to those of living humans than previously thought. The study used X-ray images to analyze tooth growth and eruption age, suggesting a relatively long childhood existed at least 160,000 years ago.
New research suggests that insect species adapted to warmer climates have faster population growth rates, which could profoundly alter entire ecosystems. This adaptation is not limited to a few species, but can impact many insects, leading to changes in food webs and species diversity.
New projections suggest that deforestation rates will decrease as population growth slows, allowing a larger area of tropical forests to remain. The study's findings provide hope that many tropical forest species can survive the current wave of deforestation and human population growth.
Population growth is expected to double in Africa by 2050, posing a significant threat to poverty reduction. Experts argue that continued high fertility rates and rapid population growth could be more serious obstacles to development than AIDS, threatening food security and increasing dependence on international assistance.
Tropical forest landscapes are changing rapidly as old-growth forests become agricultural lands, degraded land is abandoned, and urbanization intensifies. Scientists are studying the dimensions and mechanisms of forest responses to rapid human-population increase and environmental changes.
A new model predicts that many carnivores are at high risk of extinction due to their biology and proximity to densely populated areas. The researchers suggest focusing conservation efforts on species with long gestation periods living in areas with rapid human population growth.
Agricultural ecologist David Pimentel warns of unimaginable malnutrition and human misery by 2054 if current trends continue. The world's growing population is putting pressure on resources like cropland, fresh water, and energy, threatening food production.
A recent study by Ohio State University anthropologist Jeffrey McKee predicts that the United States will face a significant threat to global biodiversity within 50 years, with at least 10 additional species added to the threatened list. The prediction is based on a model that separates human population growth from environmental impact...
A recent study found that gradual temperature increases cause significant decreases in crop productivity for corn and soybeans. Climate is identified as a crucial factor in crop yield trends, contradicting previous assumptions. The study's unique approach separates the effects of climate and technology on yield trends.
A recent study reveals that the global housing boom is driven by a trend of smaller households, leading to increased resource use and habitat loss. The researchers analyzed demographic data from the United Nations and found that the growth in new housing units worldwide exceeds population growth, particularly in biodiversity hotspots.
The Northeast region experienced slow population growth during the 1990s, primarily due to high levels of domestic out-migration. New foreign immigration played a crucial role in offsetting this trend, with nearly 3.1 million new immigrants arriving in the region, accounting for over 100% of population growth.
The HIV/AIDS epidemic in Mozambique is taking a toll on education, leading to reduced school enrollments, graduation rates, and quality of education. The report predicts that the country's economy will be smaller than expected by 2010 due to reduced productivity growth, population growth, human capital accumulation, and physical capita...
Researchers find that human population growth is slowing due to increased birth rates being offset by negative feedback from crowding and resource depletion. The world population is expected to reach 10-12 billion around 2100, despite a near doubling in numbers.
A new analysis found that population growth affects coastal ecosystems in a particularly damaging way, threatening endangered species. The study used data from the US Forest Service and climate data to identify areas most at risk.
A new Cornell University study suggests that without democratic population-control practices and resource-management policies, the world's 2 billion people will face a difficult life by 2100. The report predicts an optimal population of 2 billion, with a standard of living about half that of the United States in the 1990s.
Researchers found that African elephants can coexist with humans for a certain threshold, beyond which they disappear. The 'threshold hypothesis' suggests that land planners can distinguish areas suitable for elephant conservation from those that are not.
A UC Berkeley conference on population growth and the environment will explore the impact of human population on the planet's ecosystems. Renowned populations expert Joel E. Cohen will discuss how human population, culture, and environment interact.
The 1999 Tyler Prize honors Te-Tzu Chang's research on rice genetics and conservation, which has led to major advances in plant breeding, productivity, and disease resistance. Joel E. Cohen's contributions to understanding food webs and population growth have also had a lasting impact on both.
A new hypothesis proposes that a 71,000-year-old volcanic winter and subsequent 1,000-year ice age led to widespread famine and death, causing a significant bottleneck in human populations. This event is believed to have resulted in rapid genetic divergence among modern humans.
Anthropologist David Price warns that world population's dire Malthusian 'correction' is inevitable due to finite resources. Despite progress in measures to prevent overpopulation, the stakes are higher now than ever, with proportionately more loss expected.
The increasing demand for food is projected to lead to the conversion of natural ecosystems into intensive agricultural systems, resulting in substantial environmental degradation. The study highlights the need for strategies like GIS-based management to mitigate land use changes and preserve vegetation and soil health.
A three-year international research project will assess population impact as a factor in declining biodiversity. Researchers will focus on various human population factors and measure their effects on biodiversity levels. The findings, while local in focus, will be broadly applicable to many other sites around the world.