Wildlife, biodiversity and climate
A habitable climate depends on wildlife and biodiversity, because:
- Climate is a consequence of biodiversity and biodiversity is everything that ecosystems represent to life on Earth;
- A stable climate and therefore, a habitable Earth, depends on stabilising ecosystems; and
- Animals are the only mechanism that can do that.
As wildlife declines, we are breaking down biodiversity structure and losing energy (in the form of carbon) out of food chains and into the atmosphere and ocean. This way, climate and our food security are inextricably linked. We’re not only stripping soils of the material needed to feed us, we’re also introducing chaotic free energy into our atmosphere and causing huge fluctuations in the weather. The latter makes it harder for us to know when, where and how to feed ourselves.
Climate change: fossil fuels v. wildlife
Climate change has always been the symptom of biodiversity loss … that’s to say, the breakdown of the complex connectivity between lifeforms that allows Earth to flex in response to changing conditions.
Only recently have we created artificial climate change by mining carbon buried deep underground by animals millions of years ago. The animals that did that are no longer around and today’s animals, that would be busy moderating modern-day carbon, have populations that are heavily depleted.
We cannot engineer our way out of this crisis. We can only rebuild ecosystems rich in a diversity of animal life.
Latest posts about why the oceans are important
A study just came out with former NASA climate scientist James Hansen. Therein, he warns that a reduction in the amount of atmospheric pollution could lead to an acceleration in climate warming. When it comes to cloud albedo, pollution and seabirds both have a role to play. But the animals rarely rate a mention.
Hansen warns that scientists are dangerously underestimating the impact of aerosol pollution. The way this works is that pollutants create chemicals over the ocean. These form droplets that are the basis for cloud seeding. Brighter clouds reflect more of the Sun’s heat and that’s part of the reason Earth stays cool.
while shipping only accounts for about one-tenth of total global sulfur dioxide emissions, it represents nearly 100 percent of those emissions over oceans, which absorb more than 90 percent of all the heat trapped by greenhouse gases.
Inside Climate News
Seabirds increase cloud albedo by propagating clouds
But this is also a natural process. Seabirds are one conspicuous source of ammonia that has been shown to create rainfall on a continental scale [1, 2, 3]. Read more here.
The scale of natural seabird processes and cloud albedo
The aforementioned article skips over this component. It says aerosols come from ‘from natural and human sources, including smoke, pollen, fine minerals, volcanoes and even plankton-laced sea spray’. Why downplay the role of the natural plankton processes? These are, after all, the ones most in keeping with our habitation of global ecosystems. They are the ones driven by seabirds.
All scientists struggle to conceive the scale and intensity of animal impact. It’s difficult to measure. A recent study in Greenland [4] did look at seabirds and concluded, for the island’s east coast at least, that the effect was minimal. However, the geographic range of these impacts can be across whole continents and oceans. These effects are planetary, not isolated.
We need to be very careful. I believe what Hansen is telling us. Nature has shown us how sensitive our climate is to these types of chemical reactions. What he’s really saying, however, is that our pollution has shielded us against a worse problem. That underneath the blanket of pollution, there are clearer, warmer skies.
The reason for this?
Perhaps, it’s because we have killed all the seabirds. Is that too much to believe? After all, they were the major components of this process before industrialisation. Why is this fact not being discussed by conservationists worldwide?
- Is this the largest coral on Earth? Perhaps since a week ago last Wednesday
- Snorkelling in Bayside Nov 23: Blue-ringed Octopus and Pregnant Seahorses
- Snorkel at Ricketts Point 22 Nov, Blenniful plus rare Red Gurnard
- Port Jackson Sharks at Ricketts Point, Saturday 16 Nov
- Banda Sea Expedition Report, amazing snorkelling & diving
The danger of declining seabirds and declining pollution
What of the seabirds and other marine animals? They have declined by over 70% in the last 50 or so years. We have killed the animals that form natural processes to shield us once we clean up our air pollution.
But anyone who goes out to study these effects today only measures a small proportion of what came before. And then, researchers tend to document linear effects. Birds produce a certain amount of guano but what of the transfer, amplification and concentration of nutrients? These ecosystem-level processes are poorly understood.
Others will jump to geoengineering solutions but these will be catastrophic. They replace complex ecosystem processes using a sledgehammer approach and still, the underlying seabird-driven effects are ignored. As described in Kolbert’s book Under a White Sky, we might create the illusion of fixing climate, and enable more carbon consumption. It only takes a global economic downturn to remove the manmade shield and descend once more, into climate chaos.
Isn’t this what Hansen is explaining to us right now? That by cleaning up pollution (which inadvertently protected us), we are unleashing the monster? When will we start to learn that the solution means rapidly restoring wildlife populations?
We have to start protecting and rebuilding seabird populations
When it comes to cloud albedo, pollution and seabirds fulfil the same role. But the latter do it in a more measured way that connects with our survival.
How are we going to rebuild the natural life support systems that came before all this? Unless we prioritise radical conservation outcomes, other efforts we make, will fail. This is a brilliant example of where wildlife is essential for human survival. Yet, it’s rarely talked about.
Let’s change the conversation, and explain why we cannot survive on Earth without rebuilding wildlife populations.
References
- Blackall, T., et al., Ammonia emissions from seabird colonies. Geophysical Research Letters – GEOPHYS RES LETT, 2007. 341.
- Riddick, S., et al., Measurement of ammonia emissions from tropical seabird colonies. Atmospheric Environment, 2014. 89: p. 35–42.
- Otero, X., et al., Seabird colonies as important global drivers in the nitrogen and phosphorus cycles. Nature Communications, 2018. 9.
- Dall´osto, Manuel & Geels, C. & Beddows, D. & Boertmann, David & Lange, Robert & Nøjgaard, J. & Harrison, Roy & Simo, R. & Skov, H. & Massling, A.. (2018). Regions of open water and melting sea ice drive new particle formation in North East Greenland. Scientific Reports. 8. 10.1038/s41598-018-24426-8.
