Researchers in Brazil find that high levels of heavy metals and particulate matter suspended in the atmosphere restrict the growth of tipuana trees, which are ubiquitous in São Paulo, the largest Brazilian city.
The University of Wisconsin-Madison's Monica Turner and her team describe what happens when Yellowstone -- adapted to recurring fires every 100 to 300 years -- instead burns twice in fewer than 30 years. Yellowstone as we know it faces an uncertain future, the researchers say, and one of the big questions they hope to answer is whether the forests can recover.
The caterpillars of Lymantria dispar or Gypsy Moth are voracious eaters capable of defoliating entire forests. Sometimes they can even make harm for coniferous forests. Gypsy Moths are widely spread in Europe, Asia and Northern America.
Researchers examine global strategies for dealing with predators.
Visual Seveif software measures the economic impact of a fire, taking into account both material resources and their utility for leisure and recreation, the landscape's value and, now, carbon fixation.
Spanish and Italian researchers have proven that when honey from strawberry trees, a product typical of Mediterranean areas, is added to colon cancer cells grown in the laboratory, cell proliferation is stopped. The authors hope that these promising results and the anti-tumour potential of this food will be confirmed in in vivo models.
Pyrrolizidine alkaloids (PA) are natural constituents detected all over the world in more than 350 plant species and suspected to occur in more than 6,000. Plants produce them as a defence against predators. Out of more than 660 known PA and similar compounds, the 1,2- unsaturated PA in particular have a health-damaging potential. Consequently, they are undesired in foods and feeds.
An aggressive new strain of sudden oak death, a disease that's killed millions of trees, has turned up in Oregon, posing a threat to timber production. Scientists are using a 3D model called Tangible Landscape to help stakeholders work together to find ways to contain the disease's spread.
The study shows the advantages of herbicide spraying and intensive fertilization in reforestation programs to mitigate the effects of climate change.
Tropical forests are being deforested at an alarming rate to make way for agriculture; the good news is that they can regrow naturally when the fields are abandoned. An international research team including participation from the University of Göttingen found that regenerating wet and dry forests actually show opposite pathways. This implies a fundamental change in our understanding of how tropical forests change, with consequences for forest restoration and biodiversity. Results are in Nature Ecology and Evolution.