Kloden Kalder

Kloden Kalder er et hovedfag på Ry Højskoles horisontlinje der undersøger, hvad der sker med naturen set i et globalt perspektiv og hvilke alternativer der findes til forbrugssamfundet. Denne side fungerer som fagets materialebank, hvor du kan finde fagmateriale til den virtuelle rejse og de forskellige emner som bliver taget op i fagforløbet. Klik på de forskellige overskrifter for at kalde det materiale frem der hører til de forskellige lektioner på den virtuelle rejse.

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Landmark study casts doubt on controversial theory linking melting Arctic to severe winter weather

Models find few links between sea ice loss and weakened jet stream

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'An alternative reality': how sound recordings reveal the secret world of ponds

In capturing the music of freshwater life, scientists have found a new way to measure underwater biodiversity.

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The Paris Climate Agreement and future sea-level rise from Antarctica

An observationally calibrated ice sheet–shelf model suggests that global warming of 3 °C will trigger rapid Antarctic ice loss, contributing about 0.5 cm per year of sea-level rise by 2100.

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Why is future sea level rise still so uncertain?

Why is sea level rise so hard? Data, modeling and projection challenges still exist even while we make incremental progress.

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Amazon heroes who don't give up

The Guardians of the Forest, a group of indigenous Guajajara in the Brazilian state of Maranhão, struggle to defend their land from invaders and to guarantee their survival in the midst of the COVID-19 pandemic.

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The Indigenous Emergency is the front of the indigenous movement in Brazil in confronting the pandemic of COVID-19 and its expansion over the territories and native peoples.

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ARNE NAESS

“Arne Naess” Portrait of the Norwegian philosopher Arne Naess and the Deep Ecology Movement. Made in 1997 by Rerun Productions, TheNetherlands. Shot…

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Humans Are Destroying Animals’ Ancestral Knowledge

Bighorn sheep and moose learn to migrate from one another. When they die, that generational know-how is not easily replaced.

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Regenerative Agriculture Collection | Bioneers

To feed a growing population in the face of the uncertainties of climate change, agricultural systems must be redesigned. Regenerative Agriculture has demonstrated remarkable results in eliminating toxic inputs, increasing fertility, regenerating soil life and strengthening on-farm resilience against climate extremes.

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The Whale Pump: Marine Mammals Enhance Primary Productivity in a Coastal Basin

It is well known that microbes, zooplankton, and fish are important sources of recycled nitrogen in coastal waters, yet marine mammals have largely been ignored or dismissed in this cycle. Using field measurements and population data, we find that marine mammals can enhance primary productivity in their feeding areas by concentrating nitrogen near the surface through the release of flocculent fecal plumes. Whales and seals may be responsible for replenishing 2.3×104 metric tons of N per year in the Gulf of Maine's euphotic zone, more than the input of all rivers combined. This upward “whale pump” played a much larger role before commercial harvest, when marine mammal recycling of nitrogen was likely more than three times atmospheric N input. Even with reduced populations, marine mammals provide an important ecosystem service by sustaining productivity in regions where they occur in high densities.

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Sciencespeak: Whale Pump

Whales can poop almost anywhere they want. They have the entire ocean to relieve themselves in, so most of the planet can theoretically be their toilet. Yet, despite having a near-universal lavatory pass, cetaceans often relieve themselves near the surface. In the words of marine biologists Joe Roman and James McCarthy, many whales feed in […]

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When it comes to saving the planet, one whale is worth thousands of trees.

The carbon capture potential of whales is truly startling.  Whales accumulate carbon in their bodies during their long lives. When they die, they sink to the bottom of the ocean; each great whale sequesters 33 tons of CO2 on average, taking that carbon out of the atmosphere for centuries. A tree, meanwhile, absorbs only up to 48 pounds of CO2 a year.

Protecting whales could add significantly to carbon capture because the current population of the largest great whales is only a small fraction of what it once was. Sadly, after decades of industrialized whaling, biologists estimate that overall whale populations are now to less than one fourth what they once were. Some species, like the blue whales, have been reduced to only 3 percent of their previous abundance. Thus, the benefits from whales’ ecosystem services to us and to our survival are much less than they could be.

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Scientists worldwide are warning of the looming extinction of thousands of species, from tigers and polar bears to rare flowers, birds, and insects. If the destruction continues, half of all species of plants and animals could disappear by the end of the century--and with them earth's life-support ecosystems that provide our food, water, medicine, and natural defenses against climate change.

Now Caroline Fraser offers the first definitive account of a visionary campaign to confront this crisis: rewilding. Breathtaking in scope and ambition, rewilding aims to save species by restoring habitats, reviving migration corridors, and brokering peace between people and predators. Traveling with wildlife biologists and conservationists, Fraser reports on the vast projects that are turning Europe's former Iron Curtain into a greenbelt, creating transfrontier Peace Parks to renew elephant routes throughout Africa, and linking protected areas from the Yukon to Mexico and beyond.

An inspiring story of scientific discovery and grassroots action, Rewilding the World offers hope for a richer, wilder future.

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Alt fra svampe og insekter til planter og rovfugle kan blive påvirket i en positiv retning, hvis flere heste, elge, vildsvin eller krondyr fik lov til at leve vildt.

Biodiversiteten i Danmark kan blive løftet, hvis flere rewilding-projekter bliver en del af naturforvaltningen. Det skyldes at tætheden af planteædere i Danmark de fleste steder er enten langt under eller langt over det naturlige interval. Det betyder at hovedparten af landskabet er enten under tilgroning eller overgræsset i sommermånederne med tab af biodiversitet til følge.

Det er blandt hovedkonklusionerne i en ny rapport som DCE – Nationalt Center for Miljø og Energi netop har udgivet. Her gennemgår forskere fra Aarhus Universitet og Københavns Universitet de mulige effekter af at udsætte store dyr og så at sige lade naturen passe sig selv.

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Half-Earth Project | E.O. Wilson Biodiversity Foundation

The Half-Earth Project, from the E.O. Wilson Biodiversity Foundation, is working to conserve half the land & sea to safeguard the bulk of biodiveristy.

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Rebecca Solnit on Hope in Dark Times, Resisting the Defeatism of Easy Despair, and What Victory Really Means for Movements of Social Change

“This is an extraordinary time full of vital, transformative movements that could not be foreseen. It’s also a nightmarish time. Full engagement requires the ability to perceive both.&#…