Phys.org

June 8, 2022
Traditional Owners in Australia are the creators of millennia worth of traditional ecological knowledge—an understanding of how to live amid changing environmental conditions. Seasonal calendars are one of the forms of this knowledge best known by non-Indigenous Australians. But as the climate changes, these calendars are being disrupted.

How? Take the example of wattle trees that flower at a specific time of year. That previously indicated the start of the fishing season for particular species. Climate change is causing these plants to flower later. In response, Traditional Owners on Yuku Baja Muliku (YBM) Country near Cooktown are having to adapt their calendars and make new links.

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Nation of Change

February 22, 2022
The reintroduction of gray wolves to Yellowstone National Park in 1995 triggered a cascade of knock-on effects. The wolves kept herbivores like elk in check and on the move, reducing their browsing pressure on young trees. As a result, groves of willow and aspen sprouted along watercourses, creating ideal conditions for a thriving beaver population. The busy beavers in turn engineered wetlands where a diversity of fish, songbirds and invertebrates flourished. In short, the return of the top predators transformed the U.S. national park into a biodiverse, fully functioning, carbon-sequestering ecosystem.

Now, a new study suggests that restoring just 20 large mammal species to their historic habitats could similarly revitalize ecosystems and boost biodiversity across almost one-quarter of the Earth’s land area.

The international team of researchers behind the study assessed global opportunities for the restoration, reintroduction and rewilding of intact large mammal assemblages across the world’s terrestrial ecoregions, geographic areas characterized by similar plant and animal communities. They published their results in the journal Ecography.

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