Lecture 7: Temperature Effects On Animals And Plants Flashcards
Consumers
Organsims thta feed on plants or on other organisms.
Phenology
The study of timing of development in plants and animals.
Examples or plant phenology
3
Bud burst
Flowering
Leaf fall
Examples of animal phenology
3
Emergence from hibernation
Reproduction
Migration
Warm blooded animals impacted by climate change
- Mostly well-buffered from direct temperature effects
* Responses to climate change more likely to be indirect, via food or wider ecosystem effects
Cold blooded animals impacted by climage change
• Physiology, growth and development often tightly coupled to temperature
Relationship between temperature and growth for cold blooded animals
Linear
When the relationship between temperature and development is linear, what can temperature effects be summarised as?
Acculumated temperature
How is acculmulated temperature classified?
Degrees days
Warming due to climate change effect on development of cold blooded animals?
Developmental stages occur earlier
Two examples of types of insects in the northern hemisphere that have extended their range northward?
Some plants pests
Vectors of human disease
Why do all plants have different characteristic responses to temperature?
3
Different optimum temperatures
Different minimum temperatures
Difference in metabolism
Crop plants affected by climate change
- Unlikely that increasing temperature per se limits agricultural production in the UK
- Secondary effects limiting (drought, etc.)
- Some crops will be able to be grown further north
UK native species affected by climate change
Changes in geographical range
Plant species will be lost locally and nationally
Changes in species composition of ecosystems
Examples of low temperature being essential for development in plants
Seed dormancy
Flowering in tree species and winter cereals
Seed dormancy
Broken by periods (weeks-months) of low temperature (stratification)
