Their results indicate that the radiocarbon input to the atmosphere from soils and vegetation was 2 to 3 times higher than
predicted by their ecosystem model.
Not exact matches
Because of the sheer complexity in the way parts of an
ecosystem work together, just how places like the forest floor will be influenced
by climate change will most likely remain difficult to
predict, Lensing says.
And the prognosis is grim: Without dramatic reductions in greenhouse gas emissions, all these reefs «will cease to host functioning coral reef
ecosystems by the end of the century,»
predicts the report from UNESCO's World Heritage Center in Paris.
But models used
by scientists to
predict the tipping points at which drought stress leads to
ecosystem collapse have proven unreliable and too optimistic.
By describing the structure of these webs, scientists can
predict how plants and animals living in an
ecosystem will respond to change.
«Because big bluestem is currently a dominant grass species of the Great Plains and makes up to 70 percent of the plant biomass in places, how the
ecosystem works could be affected
by predicted changes in growth of this species,» Johnson said.
Tans initially expected February to be the first month of the year above 400 ppm, but
predicting that threshold is tricky because CO2 concentrations depend both on emissions and natural
ecosystem processes, which can be influenced
by climate phenomena like the El Nino Southern Oscillation cycle, he said.
In theory, the disease could be halted
by limiting people's access to unaffected areas, but that would be a very unpopular policy and perhaps impossible to implement, he says.The rapid spread of sudden oak death is «such a dynamic system that a lot of our tools in ecology for understanding and
predicting patterns are inadequate,» says Rick Ostfeld of the Institute of
Ecosystem Studies in Millbrook, New York.
The group's November 2009 study, dubbed the Electrification Roadmap,
predicted that as many as 14 million EVs could be on American roads
by 2020 if lawmakers create «electrification
ecosystems» in several major U.S. cities simultaneously.
However, learning to
predict possible climate outcomes on the basis of both observed and modeled behavior of the different factors that make up the ocean
ecosystem is
by no means straightforward.
Ecosystems within and on the fringes of OMZs could be particularly affected
by the O2 and warming changes
predicted for bathyal environments (Table 3; Figures 2, 3; Keeling et al., 2010; Sperling et al., 2016).
For example, Theme 3 exploits information from Theme 2 to help
predict future changes in ocean biogeochemistry and
ecosystems, but results from Theme 3 also feed back into Theme 2
by providing critical information on the expected temporal and spatial changes of ocean acidification and thus enable meaningful experimental designs.
The analysis
predicts that all 29 coral - containing World Heritage sites might cease to exist as functioning coral reef
ecosystems by the end of this century if CO2 emissions are not drastically reduced.
By 2015, analysts
predict the global digital & traditional media
ecosystem will reach $ 2.9 trillion, with the rapidly evolving digital media sector crossing the 50 % tipping point.
Ecosystems everywhere will be affected
by higher temperatures, sometimes in ways we can not easily
predict.
The analysis
predicts that all 29 coral - containing World Heritage sites would cease to exist as functioning coral reef
ecosystems by the end of this century under a business - as - usual emissions scenario.
The
ecosystem response of coral reefs to climatic and other disturbances is more complex than
predicted by models based largely on temperature anomalies and thresholds only.
However, the conditions
predicted for the open ocean may not reflect the future conditions in the coastal zone, where many of these organisms live (Hendriks et al. 2010a, b; Hofmann et al. 2011; Kelly and Hofmann 2012), and results derived from changes in pH in coastal
ecosystems often include processes other than OA, such as emissions from volcanic vents, eutrophication, upwelling and long - term changes in the geological cycle of CO2, which commonly involve simultaneous changes in other key factors affecting the performance of calcifiers, thereby confounding the response expected from OA
by anthropogenic CO2 alone.