Phenology
21 important questions on Phenology
What is meant by growing degree days
What happens with the Pied Flycatchers
What happens in birds and butterflies?
- Date of first flight for species is diapause is advancing
- Birds are nesting and laying eggs ealier
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What happens with ice in the fresh water systems?
- This determines the growth and stratification conditions that affect the entire freshwater food web
- Algae bloom earlier
- Stratification changes in more temperate lakes affect growing season + competitive relationships for species
Why are changes in SH harder to detect?
What is meant with the Sawtooth in Mauna Loa?
- The NH dominates the sawtooth response because of the large landmasses at temperature latitutes
What happens when NH plants enter spring earlier?
How is the phenology in tropical forests dominated?
- Because there is little temperature seasonality
By what is flowering/fruiting governed?
- Common pattern: trees flower during annual drought periods, with fruit appearing later, when rains have returned
Why is bloomed at same time important for animals?
- If dry season is wet, flowering and fruiting fails -> less food for animals
What happens with heavy deforestation?
How do phenological changes happen in marine systems?
What happens with the phytoplankton in marine systems?
By what is the timing that plankton blooms determined?
What happens with a change in temperature?
- Species responding to photoperiod or diapause not
What happens with insect herbivores?
What means multivoltine and why is this important?
- Large increase in abundance -> pests
What happens with insect herbivores in milder winters?
- Increase -> pest -> death of host plants
How is the phenology of insect life cycles?
- Butterflies and other insect may be dependent on specific plants to complete their larval stage
When does time mismatching between species occur?
- Species interactions may be more sensitive when they involve changes in multiple climate cues
What reacts more quickly to climate change?
- Photoperiod cued responses require evolutionary change to adjust
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