Articles tagged with Rainforests
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A new study in Systematic Entomology reveals that evasive butterfly mimicry in the genus Adelpha may be a rare and overlooked type of mimicry. The researchers found that Adelpha butterflies use speed and unpredictability as a defense mechanism, making them difficult to catch for birds and other predators.
A new study estimates that the Amazon rainforest could lose up to 38% of its area by the end of the 21st century due to land use changes and climate change. The research, published in PNAS, suggests that abrupt transitions from dense forest coverage to savannah-like landscapes pose a significant risk to the ecosystem.
The Amazon is shifting to a hotter, drier climate with more intense droughts, stressing trees and increasing mortality rates. By 2100, hot drought conditions could occur up to 150 days per year, affecting tree species that are vulnerable to heat stress.
A new study reveals that human disturbances, such as logging and wildfires, are profoundly impacting the Amazon rainforest's ecological functions and evolutionary history. The researchers found that even sustainable management practices, like selective logging, have significant negative impacts on tree diversity.
Research in the Amazon reveals that regions with intermediate forest degradation are more prone to malaria transmission due to increased contact between mosquitoes and humans. The study emphasizes the need for targeted interventions integrating vector control with forest conservation.
A community-managed forest in Guatemala's Maya Biosphere Reserve supports a rich variety of medium-to-large mammals and birds comparable to those in protected national parks. However, some vulnerable species avoid areas with high human access, revealing subtle, cryptic disturbances that ripple through the forest.
A new study suggests that Amazon forest trees have increased in size by an average of 3.2% every decade over the past few decades. The research found that both large and smaller trees have benefited from increased atmospheric carbon dioxide, leading to a significant increase in tree size.
Researchers found that deforestation is responsible for a significant reduction in rainfall and increase in temperature in the Amazon during the dry season. The study quantifies the impact of forest loss and global climate change on the biome, highlighting the importance of preserving standing forests to maintain climate resilience.
A new species of bacteria of the genus Bartonella has been found in the Amazon National Park, Brazil. The DNA is similar to that of two other Andean species, B. bacilliformis and B. ancashensis, which cause Carrión's disease. No evidence suggests this new species can cause disease, but further studies are needed.
A new study projects the start of Amazon dieback as early as the 21st century under high-emission scenarios, triggered by extreme conditions and global warming levels above 1.5°C. The Amazon's natural water recycling system is weakened, leading to hotter and drier conditions that can no longer sustain dense vegetation.
The decline of seed-dispersing animals, including birds and mammals, hinders the fight against climate change by altering forest composition and reducing carbon absorption. Researchers warn that major global efforts underestimate the importance of frugivores in conservation and restoration strategies.
Researchers conducted the world's biggest bird survey in Colombia, recording 971 species and finding that clearing rainforest for cattle pasture causes a 60% greater biodiversity loss than previously thought. The study highlights the need for policymakers to consider the larger-scale impact of deforestation on biodiversity.
The Amazon has experienced a 163% increase in degradation and a 54% decrease in deforestation between 2022 and 2024. This 'negative balance' of biome protection threatens Brazil's international climate commitments, particularly its target to reduce greenhouse gas emissions by 59-67% by 2035.
University of Leicester researchers analyzed coral cores to spot the start of industrial deforestation in Malaysian rainforest and its impact on coastal ecosystems. The study found that sediment concentrations remained low before 1950, but increased after, indicating enhanced soil erosion due to deforestation.
A new tool, called the Condition Assessment Framework, makes it possible to assess the ecological equivalence of an area to be restored or protected in relation to a degraded area. It considers three important attributes: biodiversity, landscape, and ecosystem services.
The Amazon rainforest could withstand prolonged droughts caused by climate change, but this would come with significant losses, including the death of largest trees. This would lead to a reduction in the forest's ability to act as a vital carbon sink.
A recent study suggests that aquaculture in the Amazon can be a more sustainable alternative to livestock farming, producing 10 times less greenhouse gases and using 20-100 times less land. This could help achieve food security in the region while minimizing environmental impact.
Researchers found that Ficus insipida tree cores can be used to characterize spatial and potentially temporal mercury emissions from artisanal gold mining. Tree rings showed higher mercury concentrations near mining sites, indicating a potential network of biomonitoring.
Researchers discovered how monkeys produce 'voice breaks' and 'ultra-yodels' using their vocal membranes, which allow for a wider range of calls. These unique vocalizations enable monkeys to communicate in different ways, particularly in complex social lives.
A new study reveals that tropical forests in the Americas are not adapting quickly enough to keep pace with climate change, with some species thriving while others struggling. The research found that traits such as being deciduous and drought tolerance influence a tree's ability to survive in a changing climate.
Researchers have discovered human habitation in African rainforests dating back approximately 150 thousand years, challenging previous assumptions that humans were absent from these areas. This finding highlights the complexity of human evolution and suggests that ecological diversity played a key role.
Scientists have found a consistent pattern of dispersal events where Inga trees migrated from the Amazon to the Atlantic rainforest, highlighting the importance of conserving riverside forests. The study's findings suggest that these 'highways' played a crucial role in shaping the history of biodiversity in the region.
The study highlights the importance of semi-dry forests in Nui Chua NP, which have the highest diversity and occupancy of the silver-backed chevrotain. Conservation efforts should prioritize these transitional habitats to protect this flagship species.
Botanists from Oxford University and University of the Philippines Los Baños have named a new species of 'lipstick vine' found in the Philippine rainforest, characterized by delicate purple mottling. The discovery is significant as it highlights the importance of conservation efforts to protect the region's biodiversity.
A new study reveals that less than a quarter of the world's tropical rainforests have sufficient quality to support thousands of threatened species. The research highlights the urgent need for conservation strategies that prioritize forest integrity over mere preservation of cover.
Fossil evidence from Australia and South America challenges prevailing narrative that eucalypt forests are under siege from expanding rainforests. The study suggests that fire became a feature of these vegetation interactions in Australia around five million years ago, making large-scale fire interventions unnecessary.
A recent study published in Nature Sustainability analyzed global forest disturbance patterns from 2002 to 2014, identifying four main types of patches and mapping their distribution across different biomes. Human activities tend to leave similar patterns globally, with potential implications for forest resilience.
A new study warns that climate change could lead to the loss of up to 68% of the world's temperate rainforests by 2100, highlighting the urgent need for action. The UK has a quarter of the world's potential for restoration and is resilient to low and medium amounts of future warming.
An international team of researchers has discovered seven new species of tree frogs in Madagascar, characterized by their high-pitched whistling calls. The unique vocalizations are believed to serve as self-promotional advertisement calls to convey information about the male frog's suitability as a mate.
Researchers found that extreme temperatures and humidity projected for the Amazon under climate change may increase methane-producing microorganisms in flooded areas and reduce methane uptake in upland forests by 70%. This could lead to a shift in the balance of greenhouse gas emissions, with significant global impacts.
A new study reveals that bais, vast treeless clearings in the Congo Basin, are home to numerous endangered species, including Western lowland gorillas and African forest elephants. The researchers found over 2,000 distinct bais, covering less than 0.2% of the national park's landscape.
Researchers are working on a new method for preserving microbial samples using microfluidics, biomaterials, and protein engineering. The goal is to improve biosurveillance and protect soldiers and civilians from infectious diseases.
A study by University of São Paulo shows that expansion of cattle ranching to meet growing domestic demand has contributed more than any other driver to Amazon's original vegetation degradation. Domestic markets exert far greater pressure on deforestation, according to the study.
A new study finds that future climate change may reduce the Amazon's ability to act as a carbon sink by making it drier and hotter. The Amazon rainforest's carbon storage capacity is threatened by increased frequency and severity of droughts and heat extremes.
A team of researchers found evidence of a lush, diverse rainforest on the Falkland Islands up to 30 million years ago. The South Atlantic archipelago was covered in cool, wet woodland similar to present-day rainforests found in Tierra del Fuego.
A new study reveals that the Amazon's remarkable variety of plants and animals was shaped by woodlands and savannas connecting forest islands during the last Ice Age. The researchers used advanced climate and vegetation modelling techniques to provide a new understanding of the region's evolution.
A new study shows that predicting exact tipping times for critical Earth system components is challenging due to large uncertainties. The authors identified three primary sources of uncertainty and found that predicted tipping times for the Atlantic Meridional Overturning Circulation (AMOC) ranged from 2050 to 8065.
A study analyzing 127 studies reveals 'thresholds' for logged rainforests to sustain themselves. Beyond a certain threshold, serious proactive conservation is needed to maintain biodiversity; otherwise, the forests rapidly lose their ecological value. The findings expand the scope of which forests are considered worth conserving.
Researchers at University College Cork have discovered three new species of Theobroma sect. Herrania in the rainforests of South America, which are closely related to the cocoa tree. These findings could lead to the development of climate-resilient cacao trees, helping sustain chocolate production.
Researchers found that tropical tree communities exhibit higher levels of phytochemical diversity, leaf herbivory, and specialized herbivory compared to less diverse subtropical and subalpine forest communities. This study highlights the importance of biotic interactions in maintaining biodiversity in tropical regions.
The study reveals regional differences in Amazon drought response due to local environments and tree properties. The southern Amazon, with shallow water tables, is more vulnerable to drought, while the northern region, with deeper roots and less fertile soil, is more resilient.
A study by the University of Göttingen investigated regional differences in bird diversity within cocoa agroforestry systems in Peru. The research team found that biodiversity decreases with increasing distance from natural forests, with greater richness of species found in humid subtropical forests than in dry tropical forests.
Wildfires in the Amazon's old-growth forests increased by 152% in 2023, primarily caused by drought, with most of them occurring in Roraima state. This surge in forest fires poses significant risks to the environment and public health.
A new study by the University of Plymouth found that saturated soils in upland regions could negatively impact the survival rates of young oak saplings and acorns. The research highlights the importance of considering soil conditions when creating temperate rainforests to combat climate change.
Deforestation rates accelerated in the region, with 32 municipalities and 1.7 million inhabitants under pressure. The study highlights concerns over land speculation and lack of environmental impact studies for the proposed 'Abunã-Madeira Sustainable Development Zone'.
Researchers found that oil palm plantations in Indonesia's Kais River Watershed are causing significant increases in precipitation, runoff, and soil moisture, leading to dramatically worse water quality. The transition from tropical rainforest to oil-palm plantation has resulted in a 16.9% increase in sedimentation, 78.1% increase in n...
Researchers created new maps that accurately describe phosphorus levels in Amazonian soil using artificial intelligence, revealing the region's low concentration of the mineral. This information is crucial for understanding how tropical forests will react to climate change.
Two Micrurus mipartitus coral snakes have been observed battling for a caecilian in the dense rainforests of western Colombia, showcasing a rare example of kleptoparasitism among Elapidae family members. The study highlights the elusive nature of these reptiles and challenges of observing them in their natural habitats.
A new study finds that extreme tropical cyclone rainfall is increasing across the continental US, while climate warming restricts 'outdoor days' for people living in developing countries. Additionally, air pollution increases mortality risks from heat, especially when combined with other factors like wildfires and reduced aerosols.
A study by Yale University researchers found that Sri Lankan rainforests are losing their ability to act as carbon sinks due to climate change, with some slow-growing tree species declining in biomass over a 40-year period.
Genetic research revealed many new fern species in tropical America, with 18 newly named and described species. The study found that similar-looking species were previously thought to be a single widespread species.
A survey of social media posts suggests that people are more positive about nature-based efforts to protect carbon-storing ecosystems than human technological solutions. The study found that tree-planting solutions, such as afforestation, received the most approval, while geoengineering was associated with negative sentiments.
Researchers find that halting deforestation and restoring native vegetation are critical for Brazil to achieve its 2050 net zero goal. The study suggests that nature-based solutions can mitigate nearly 80% of Brazil's net zero pledge and reduce carbon emissions by 781 million tons per year.
Researchers used AI models to analyze animal sounds in reforested areas, finding that vocalizing species communities mirror biodiversity recovery. The study suggests potential applications for monitoring biodiversity and could lead to certifications or credits for environmental projects.
A study by Charité and Leibniz-IZW found that reducing biodiversity in rainforests leads to an increase in virus prevalence among mosquito species. This is because resilient species thrive in disturbed habitats, carrying viruses with them. The research reveals the importance of biodiversity in understanding infectious disease dynamics.
Researchers found that reducing biodiversity harms mosquito species, leading to more resilient species and increased virus prevalence. The study suggests that a decrease in biodiversity can lead to an increase in the spread of viruses carried by mosquitoes.
A new species of spiny mouse, Neacomys marci, has been identified in northwestern Ecuador. The discovery sheds light on the previously underestimated diversity of the Spiny Mouse genus.
A Rutgers-led study reveals that Amazonian lowland rainforest areas critical for absorbing carbon dioxide and buffering climate change may morph over time into dry, grassy savannas. The findings highlight the impact of double-stress conditions, where alternating flooding and drought limit forest establishment and favor short-lived gras...
Researchers have discovered fossils of a group of spurges in Argentina that date back 52 million years, suggesting these plants migrated from South America to Asia and beyond. The findings provide the first direct fossil evidence of spurges in Gondwanan South America, contradicting previous assumptions about their Asian origins.
A groundbreaking expedition in Colombia's Chocó Biogeographic Region has revealed four new tarantula species, including the exceptional trapdoor spider Ummidia solana. The discovery expands their geographical distribution and offers valuable insights into their morphological characteristics, taxonomy, and biogeography.