Monday, July 13, 2015

Resilience:  A New Conservation Strategy for a Warming World

This tidal marsh in San Francisco Bay is one of the key areas on which local environmentalists are focusing. (Credit: San Francisco Estuary lnstitute) Click to Enlarge.
Resilience, in a nutshell, means preserving options — no one can predict the climate future with any certainty and how the biodiversity deck will be reshuffled.  So that means protecting landscapes that maintain as wide a variety of characteristics to preserve as many species as possible, in order to maintain both ecological function as the world changes and the ability to recover from disturbance. 
...
In 2010 Mark Anderson and Charles E. Ferree of The Nature Conservancy published a paper called “Conserving the Stage: Climate Change and the Geophysical Underpinnings of Species Diversity” that looked at the northeast United States and ways to predict where the greatest biodiversity occurs.  At the time, forecasting of species migration looked primarily at what climatic conditions a species lives in now and where those same climatic conditions might exist in the future, which is presumably where those plants and animals would move to. 

But biological models are frustratingly untrustworthy because there are so many variables.  So Anderson, using earlier research, compared the impact of climate on plants and animals with abiotic, or non-living factors, such things as geology, elevation, and landforms — and got a surprise.  "Abiotic variables were fantastic predictors of how much diversity was in a state," said Anderson.  "And climate variables were not good predictors." ... One of the best predictors for richness of biodiversity, for example, is limestone because many species thrive in its low acid, calcium- rich soil.  A good deal of biodiversity, in fact, occurs only in limestone regions. 

The idea of “conserving the stage” has become a big part of conservation thinking since 2010. "It's a key aspect," said Robin Grossinger, senior scientist with the San Francisco Estuary Institute.  "The physical drivers, such as the sediment, are what shapes habitat and gives it the dynamic ability to adapt over time. 

Read more at Resilience:  A New Conservation Strategy for a Warming World

No comments:

Post a Comment