Chapters - Past freshwater changes
17 important questions on Chapters - Past freshwater changes
Why are extinctions rates so high in freshwater systems?
By what is the base of freshwater food chains often occupied?
How do species ranges shift in fresh water?
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What might lakes provide insight into?
- droughts
- regional climatic changes
- teleconnections
- rapid climate change
- drivers of climate cycles
Isotopic and lake level indices are important in most of these investigations, whereas unique features such as pronounced stratigraphy (varves) are crucial in a few.
Where are global changes in mean temperature often inferred from?
Where are regional temperature and especially precipitation changes discernable from?
What will the results of intensification of stomr events be?
- increases in annual streamflow
- a compression of the annual flow volume into shorter bursts, resulting
- intensified low-flow conditions
- increased streambed cutting
- resulting habitat alterations.
What are the characteristics of the epilimnion?
What are the characteristics of the hypolimnion?
Oxygen may become depleted.
What effect might reduced temperature difference between the warm surface layer (epilimnion) and deep water (hypolimnion) have on the system?
How are smaller differences in temperature required to create stratification in warm tropical waters versus lakes at higher latitude?
Where do summer and winter stratification result from?
What are monomictic lakes?
What are dimictic lakes?
What are meromictic lakes?
What are oligomictic lakes?
What is the Press and Pulse hypothesis?
The question on the page originate from the summary of the following study material:
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