CHAPTER
5
TROPHIC
STATUS, FOOD AVAILABILITY AND FEEDING BY AQUATIC ANIMALS
Amounts
of living and dead organic matter in water
- Patterns of
change through 24 hours
- Seasonal patterns
of change
- Other sources
of variation in DOM and POM
Changes
in trophic status in space and time
- Trophic status
- Eutrophication,
its causes and consequences
Models
of trophic dynamics
- The simplest,
early models
- Food webs
and functional models
- Resource partitioning
Catastrophic
effects on trophic structure
- Acid rain
- Poisoning
of trophic structure by conservative pollutants
- Oil pollution
- Small scale
poisoning
Another
look at trophic pathways
- The microbial
loop
- The role of
protists: a forgotten component in trophic models
- Direct uptake
of DOM
Fixing
light or chemical energy
- Symbiosis
involving the fixing of light and chemical energy
Methods
of acquiring food in multicellular organisms
- Shredders
and scrapers
- Suspension-feeding
collectors
- Devices used
by deposit feeders
- Predation
and predation strategies
- Avoiding being
eaten
Combining
feeding strategies in space and time
Processing
of food by aquatic organisms
- The gut as
an "external" environment
- How much of
the ingested food is absorbed?
- Relationship
between the quantity and quality of the diet
- The importance
of coatings
- Faecal production
and coprophagy