1. Ecosystems

    Brazil Nut Loss Looms: Harvest may be too heavy to last

    A study of 23 spots in Amazonian forests has raised the question of whether the collection of Brazil nuts—praised as a model of gentle forest use—has reached such levels that it may not be sustainable.

  2. Ecosystems

    New Farmers: Salt marsh snails plow leaves, fertilize fungus

    A salt marsh snail works the leaves of a plant in what researchers say looks like a simple form of farming.

  3. Ecosystems

    UK halts badger kill after study of TB

    Partial results from a new study have pushed the United Kingdom to stop its controversial, decades-old policy of killing local badgers if cattle catch TB.

  4. Ecosystems

    Will Climate Change Depose Monarchs? Model predicts too-wet winter refuges

    A computer analysis suggests that eastern monarch butterflies may not be able to tolerate the increasingly moist climate in Mexico, their current wintering site.

  5. Ecosystems

    Killer Consequences: Has whaling driven orcas to a diet of sea lions?

    Killer whales may have been responsible for steep declines in seal, sea lion, and otter populations after whaling wiped out the great whales that killer whales had been eating.

  6. Ecosystems

    Risky High Life: Mountain creatures prove extra-vulnerable

    Some of the species hardest hit by climate change will be those living in particular mountain highlands.

  7. Ecosystems

    Shark Serengeti: Ocean predators have diversity hot spots

    The first search for oceanic spots of exceptional diversity in predators has turned up marine versions of the teeming Serengeti plains.

  8. Ecosystems

    Virtual skylarks suffer weed shortfall

    A new mathematical model raises the concern that switching to transgenic herbicide-tolerant crops could deprive birds of weed seeds.

  9. Ecosystems

    Zebra mussels to the rescue

    Bioengineers have harnessed zebra mussels to help avert algal blooms by cleaning particles, including algae, from the water.

  10. Ecosystems

    At a Snail’s Place: Rock climbing cuts mollusk diversity

    As rock climbing soars in popularity, some cliff-side snail populations may be crashing.

  11. Ecosystems

    Cultivating Weeds

    Some formerly mild-mannered plants turn into horticultural bullies when planted far outside their native range.

  12. Ecosystems

    Spring Forward

    Scientists who study biological responses to seasonal and climatic changes have noted that the annual cycles for many organisms are beginning earlier on average, as global temperatures rise.