Two of the species most impacted by changes in woody cover. The Long-crested Eagle is a winner, while the Greater Blueeared Starling is a loser.
Across southern Africa, native woody plants are encroaching into open systems. Multiple factors have changed the fine balance between grasses and trees, including increases in atmospheric carbon dioxide and changes in rainfall, temperature, fire frequency and herbivore densities. In many areas shrubs and trees are winning their competition with grasses.
Satellite imagery allows us to map and document this change. In the past decade, several science teams have harnessed this imagery to record changes in grasslands and savannas. Importantly, archived images enable us to measure the historical rates of change. Such studies have shown a general shift from open grasslands to woodier, more closed ecosystems both in southern Africa and more broadly across the world's grasslands.
Denne historien er fra May/June 2022-utgaven av African Birdlife.
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Denne historien er fra May/June 2022-utgaven av African Birdlife.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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EXPLORING NEW HORIZONS
Keith Barnes, co-author of the new Field Guide to Birds of Greater Southern Africa, chats about the long-neglected birding regions just north of the Kunene and Zambezi, getting back to watching birds and the vulture that changed his life.
footloose IN FYNBOS
The Walker Bay Diversity Trail is a leisurely hike with a multitude of flowers, feathers and flavours along the way.
Living forwards
How photographing birds helps me face adversity
CAPE crusade
The Cape Bird Club/City of Cape Town Birding Big Year Challenge
water & WINGS
WATER IS LIFE. As wildlife photographer Greg du Toit knows better than most.
winter wanderer
as summer becomes a memory in the south, the skies are a little quieter as the migrants have returned to the warming north. But one bird endemic to the southern African region takes its own little winter journey.
when perfect isn't enough
Egg signatures and forgeries in the cuckoo-drongo arms race
Southern SIGHTINGS
The late summer period naturally started quietening down after the midsummer excitement, but there were still some classy rarities on offer for birders all over the subregion. As always, none of the records included here have been adjudicated by any of the subregion's Rarities Committees.
flood impact on wetland birds
One of the features of a warming planet is increasingly erratic rainfall; years of drought followed by devastating floods. Fortunately, many waterbirds are pre-adapted to cope with such extremes, especially in southern Africa where they have evolved to exploit episodic rainfall events in semi-arid and arid regions. But how do waterbirds respond to floods in areas where rainfall - and access to water - is more predictable? Peter Ryan explores the consequences of recent floods on the birds of the Western Cape's Olifants River valley.
a star is born
It’s every producer’s dream to plan a wildlife television series and pick the right characters before filming.
