Unknown
Freshwater Biological Association
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Ambleside, UK
In:
http://aquaticcommons.org/id/eprint/5244
|
3949
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2011-09-29 15:14:07
|
5244
|
Freshwater Biological Association
Publication Date:
2021-07-09
Description:
Loxodes faces special problems in living close to the oxic-anoxic boundary. In tightly-stratified ponds like Priest Pot its optimum environment may be quite narrow and it can be displaced by the slightest turbulence. Loxodes cannot sense an O sub(2) gradient directly but its ability to perceive gravity allows it to make relatively long vertical migrations. It is also sensitive to light and oxygen and it uses these environmental cues to modulate the parameters of its random motility: in the dark, it aggregates at a low O sub(2) tension and in bright light it aggregates in anoxic water. The oxic-anoxic boundary is also a zone where O sub(2) may be a scarce and transient resource, but Loxodes) can switch to nitrate respiration and exploit the pool of nitrate that often exists close to the base of the oxycline.
Keywords:
Biology
;
Ecology
;
Anoxic conditions
;
Dissolved oxygen
;
Ecophysiology
;
Freshwater lakes
;
Light effects
;
Physiochemical properties
;
Turbulence
;
Vertical migrations
;
Loxodes
;
England
;
Cumbria
;
Annual report
Repository Name:
AquaDocs
Type:
book_section
,
FALSE
Format:
application/pdf
Format:
application/pdf
Format:
33-56
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