Publications by authors named "A E Leiman"
We studied restoration of microvessels in the oral mucosa wound defects under a polymer piezoelectric membrane (group 2) and without it (group 1). The control group included animals with intact mucosa. On day 3, the expression of the vascular endothelial growth factor (VEGF) increased in all experimental groups, while the expression of CD34 increased only in group 2, which attested to intensive neoangiogenesis.
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- - The evaluation of conservation strategies is often lacking, limiting transparency and efficiency in resource allocation, especially noted in orangutan conservation efforts where about USD 1 billion was invested from 2000 to 2019.
- - The study found that habitat protection, patrolling, and public outreach yielded the best returns on investment for orangutan population maintenance, but effectiveness varied by region due to different threats and costs.
- - By using a new framework to analyze conservation investments, the research highlights the importance of understanding the complex relationships between funding and conservation outcomes, offering valuable insights applicable to global biodiversity efforts.
Unsustainable exploitation of natural resources is increasingly affecting the highly biodiverse tropics [1, 2]. Although rapid developments in remote sensing technology have permitted more precise estimates of land-cover change over large spatial scales [3-5], our knowledge about the effects of these changes on wildlife is much more sparse [6, 7]. Here we use field survey data, predictive density distribution modeling, and remote sensing to investigate the impact of resource use and land-use changes on the density distribution of Bornean orangutans (Pongo pygmaeus).
View Article and Find Full Text PDFFor many threatened species the rate and drivers of population decline are difficult to assess accurately: species' surveys are typically restricted to small geographic areas, are conducted over short time periods, and employ a wide range of survey protocols. We addressed methodological challenges for assessing change in the abundance of an endangered species. We applied novel methods for integrating field and interview survey data for the critically endangered Bornean orangutan (Pongo pygmaeus), allowing a deeper understanding of the species' persistence through time.
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- Air pollutants negatively impact human health, prompting a study on effective policies and technologies to mitigate these effects in densely populated areas of South Africa.
- The research ranks interventions, finding that low-cost household measures, like proper coal usage and roof insulation, are more efficient than industrial policies.
- The study suggests prioritizing household interventions before pursuing additional industry regulations, as current industrial measures do not provide sufficient health care cost justification.