climate change and conservation (lec 24-26) fyi – additional reading chapter 10 - principles of...
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Climate change and conservation (Lec 24-
26)FYI – Additional Reading
Chapter 10 - Principles of Conservation Biology
Vince (2009) Surviving in a warmer world. New Scientist Vol 201 No. 2697
Parmesan (2006) Annual Review of of Ecology and Systematics 37: 637-669
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Summary so far
Atmospheric gases prevent long wave (IR) energy from being dissipated into space
CO2 contributes most to the Earth’s ability to absorb and retain solar energy (i.. it has the strongest radiative forcing)
Data from ice cores show CO2 and global temperatures have risen over the last 100 years
All scenarios developed by the IPCC suggest CO2 levels and global climate change will continue
The IPCC chair suggests we should plan for a 4C warming by 2100
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Climate change and conservation (Lec 25)
Predicted Impacts on Biological Systems
Observed Ecological Impacts
Ecosystem feedback loops
Conservation implications
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Climate can determine the distribution of species
Changes in temperature or precipitation will change the geographical range of species
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How will climate change impact biomes, communities, species?
Predictions
Geographic ranges shouldmove towards the polesshow elevational changes
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Climate envelope modelling
Current climate+ distribution“climate envelope”
Predict climate+ climate envelope Predicted distribution
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How will climate change impact biomes, communities, species?
Predictions
BUTDifferent species in a community
have different needs and tolerancesvary in their ability to move
Species differ in their responseNew communities are createdSpecies abundances changeNew species invadeSome species go extinct
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Observed Ecological ImpactsRange shiftsBirds
Great Britain - 59 species - northward shift of 19 km in 20yrs
North America- 56 bird species- north ward shift of 46 km in 20 yrs- range is contracting because southern range boundary shifting faster
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Observed Ecological ImpactsRange shiftsBirds - North America - winter range
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Observed Ecological ImpactsRange shiftsMammals
Red foxhas expanded into the North
Arctic fox has contracted to Atlantic
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Observed Ecological ImpactsRange shiftsButterfliesNorth America and Europe58 species2/3 shifted north 100km/decade
Edith’s checkerspot
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Observed Ecological ImpactsRange shiftsPlankton – mesozooplankton in the ne Atlantic
Northwards shifts of 1000km
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Observed Ecological ImpactsElevational change
Monteverde National Park, Costa Rica
Lowland birds move intomontane cloud forest
Siberia and Canadian Rockies
Treeline movement has been documented
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Observed Ecological ImpactsPhenological change
PlantsJapan- Cherry
- 1400-1900 no change in flowering timing- 1950 on timing has advanced
Europe – Grape harvest- 1500-2000 – timing depends on temp- 2003 earliest harvest ever
AnimalsUS - Frogs- 6 spp 1900-2000
10-13 day advance linked to 1 -2.3C increase
UK Birds 20 spp 1970-1995 9 day advance in laying date
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Summary of studies for 944 species(Parmesan and Yohe 2003)
Climate change As predicted Opposite to prediction prediction % %
Earlier timing 87 13
Extension 81 19of range boundariespolewards
Community change 85 15Cold adapted species declineWarm adapted species increase
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Consequences of range shifts
What happens when your food moves?
Triangle Island BCSea surface temperature influences availability of the copepod Neocalanus cristatus
Warm-water prey species are smaller and have lower fat content
Less N cristatus reduced nestling growth and lower fledgling success
Cassin auklets have declined 2.3%/yr over the last 40 yrs
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Consequences of range contractions
What happens when you can’t go up anymore?
8400 landbirds2.8C increase in temperature – 5% extinct by 21006.4C 30% extinct by 2100
Sekercoglu (2008) Cons Bio 22:140-150
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Consequences of phenological shifts
What happens if your timing is off?
Colorado Rocky Mountains- 1.4C rise in air temperature 1975- 1999
yellow bellied marmots emerge from hibernation 38 days earlier
American robins arrive 14 days earlier
BUT snowmelt and plant flowering has NOT changed
The gap between arrival/emergence and when food is available has increasedthis will increase mortality and reduce clutch/litter size
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Additional consequences of climate change
Pest species and disease are also moving polewards and upward
Eg Chytrid fungusCooler days and warmer nights have resulted in favourable conditions at mid-elevation sitesChanges in dynamics of the skin fungus is implicated in subsequent extinctions of 74 harlequin frog species
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Summary so far
Climate change is unequivocal
Biological impacts are being detected already
Adaptation and mitigation are necessary
Next
Biodiversity/Conservation impacts on climateConservation implications