How climate change may affect local (S. California) gardens & what you can do to prepare. This lecture is part of the 'Out of the Wilds and Into Your Garden' native plant gardening series (2014).
46. Some potential effects of global warming
on productivity
productivity – up to a point and if (and only if)
other requirements are met
Some plants will have flowering, pollination and
seedset – including some important agricultural
crops (rice; soybeans; ‘cool season’ plants)
Changes in thermoperiod (daily temperature
change) may effect some plants
Lower winter temperatures (and longer winters)
growth/productivity
Temperature fluctuations may affect dormancy
47. Potential effects of global warming on
productivity, continued
Optimum growth temperature with CO2
drought tolerance (if plant can partially close stomata)
However, some plants will have growth at high
temp/CO2
temperatures in some important agricultural
areas may adversely affect world food supply
High temperatures + drought
plant health – more vulnerable
fire vulnerability
growth of non-native weedy species
96. Effects of smog on Ponderosa Pine
http://www2.nature.nps.gov/air/pubs/Core_Slides/effects.htm
http://www.yosemite.org/naturenotes/AirQuality2.htm
Ozone - damages needles causing mottling
and loss of needles, leading to bark beetle
attack and ultimately death