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Once Running Out of Water, San Diego Now Manages Their Water So Well They Can Assist Other States

Image and information from this New York Times article:

After spending half a decade ravaged by drought, San Diego has invested significant time and money in decreasing its reliance on water imports. By building desalination plants, strategically acquiring water rights, boosting dam storage--and increasing water use efficiency even to the point of now recycling sewage water--they have now thoroughly accomplished that goal.

"For the first time in 500 years, the European beaver has been seen in Portugal, a moment that one nonprofit has called “one of the most significant steps in the aquatic rewilding of Portuguese rivers.”

As GNN has reported in the case of the UK, there is no animal other than humans capable of engineering its natural environment at the same scale as the beaver, and it’s clearly this trait which has Portuguese ecologists jumping for joy.

Extinct in the small Iberian country since the 15th century, this large rodent has recently been reintroduced and restored in various parts of Portugal’s large neighbor. Gradually, signs began to appear that the beaver (Castor fibre) was progressively inching closer to Portugal, until recent camera trap footage confirmed the animal’s presence in the country.

“We’ve been on the lookout for this breakthrough for a few years now, and now we’re thrilled to confirm its return. The beaver is a natural ally in restoring the health of our rivers and wetlands and has a fundamental role to play in our river ecosystems,” says Pedro Prata, Team Leader at Rewilding Portugal.

Through its constant activity building dams, beavers transform landscapes into watery paradises for small fish, amphibians, invertebrates, insects, and birds. Their damning of rivers diverts water flow in various different directions, cuts channels for floodwater, and creates ponds and wetlands.

“We’re talking about a species that provides ecological services that no modern equipment can replicate with the same efficiency and scale, without costs and bureaucracy that can never be overcome. The beaver improves water quality, creates refuges for other species and helps us fight phenomena such as drought and fires,” emphasizes Prata.

Portugal suffers from both drought and wildfires, which the beaver’s impact can help prevent through the increased water retention in dryland soil, while the wetter lands beaver dams create act as natural fire breaks.

Beavers don’t only live in the forest, they will happily transform a desert river as well.

Rewilding Portugal, in an article celebrating the animal’s return, detailed how they have long since anticipated this arrival, and informed the relevant ecological authorities to prepare for the disruptive effects which beavers bring hand in hand with the positive ones.

France, Germany, Sweden, and Switzerland have all had to cope with the occasional dam-bursting flood, or an agriculturalist complaining about their riverside plantations being damaged, or someone getting their trees gnawed down. They cope with it in different ways, which Rewilding Portugal say is a worthwhile accommodation for the benefits the beavers bring.

Previously, GNN reported that Rewilding Portugal have reintroduced European wood bison into the Greater Côa Valley ecosystem. As the beaver does in water, the bison does on land: engineering the landscape into a biodiverse and resilient patchwork of micro-ecologies."

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