Global Warming and Biodiversity

Global warming denial takes many forms and for a number of reasons. One factually true but disingenuous form of denial involves the claim that climate change has happened before and will happen again so we don’t need to take action.

It is factually true that the climate changes. But the changes which have occurred in the past generally took anywhere from tens of thousands to millions of years. On these time scales plants and animals adapt and net biodiversity is at least stable or even increases due to evolutionary adaptation to change.

Rapid climate change such as we are observing now is occurring at a pace which drives species to extinction. Slow climate change can be good as it leads to greater biodiversity but rapid climate change is always bad as it reduces species diversity. The richness, the real value – even economic value – of a biome is related to the diversity of organisms present.

Ecologists discuss this in terms of environmental services. Environmental services are the benefits we derive directly from our environment. Climate stabilization, biogeochemical cycles, the hydrologic cycle, soil development and protection, pollination services, and pest control are among the services provided by diverse environments.

Climate stability depends to some degree on forestation which removes carbon from the atmosphere while providing an environment that harbors much other biota leading to richness.

Biogeochemical cycles which release nutrients and build soils are enhanced by a rich biota that contribute to the process. Decomposing plant matter release substance which help build soil which contribute to more and more diverse biota.

The hydrologic cycle is stabilized to large degree by the flora and fauna. The flora provide soil stability and nutrients for herbivores. Herbivores feed carnivores. Fauna such as beaver are described as a keystone species. They enhance wetland habitat, reduce downstream flooding, and reduce silt runoff. In so doing they provide an important niche for other species as diverse as predators -wolves, coyotes, and mountain lions and any number of prey organisms like fish. The fish service the environment through fertilization for more flora.

Over a third of the human diet depends on insect pollination of vegetables, legumes, and fruit. Even meat production requires pollination of important feedstock such as alfalfa. Pollination is a service for which there is NO practical alternative.

While we are on thirds, over a third of crop production is lost to pests. Literally tens of thousands of insects exist in predator prey relationships. Invariably the more diverse the biome the more stable and therefore predictable is the environment.

Finally there are untold miscellaneous services. The majority of drugs come from or are produced synthetically but patterned after substances from nature. Woodpeckers are studied to learn how to build crash helmets, squid nerves can be a thousand times as long a human nerves and their study important to neurology. Even the study of primates, related indirectly to human ancestors, can tell us much about the evolution of human behavior.

Climate stability helps maintain a richness to our lives. Rapid climate change will if we allow it, produce a warmer, flatter, less attractive human existence. Is that what you want for future generations?

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