551.48/R.A
Aquatic Productivity
an introduction to some basic aspects of biological oceanography and limonology
W. D. Russell-Hunter
Contents
Introduction: productivity in evolution and in nutrition
Productivity as biomass and energy / Feeding the world / Productivity and evolutionary change
Organic cycles and trophic levels
Organic cycles / Trophic levels / Trophic series and evolution
The seasons in temperate seas
the phytoplankton / The euphotic zone / Temperature stratification / The spring diatom increase / Primary production / Limiting factors and predictive theory
Food-chains and productivity in temperate seas
Calanus and its allies / Copepod seasons / Other holoplankton / Larval forms and larval seasons / More food-chains / Food-chain tracers / Pelagic animal productivity
Polar, tropical, and inshore seas
Arctic and Antarctic seas / Tropical seas / Productivity in inshore waters / Estuarine productivity
Productivity in lakes
Limits of lakes / Trophic classification of lakes / Loch Lomond / Lake seasons / Human use of lakes
Streams, rivers, and water pollution
The abiotic environment / Food-chains and productivity / Organic pollution
A closer look at the biogeochemistry of some elements
Cycle pattern and carbon / The nitrogen cycle / The phosphorus cycle / Silicon and other cycles / Bacterial geochemistry / More constituent ratios / C:N ratio
A closer look at energy transfer
Energy flow and green plants / Various efficiencies
“Over-fishing” and “under-fishing”
Russell’s model / Obtaining maximum yield / Lessons from whaling / Future regulation
Productivity and evolutionary change
Community structure and competition / Evolution in fresh water / Rates of turnover and of change / A defense of teleology
The finite nature of primary productivity
Global carbon computations / Global energy computation / Increase in primary productivity
<!--[if !supportLists]-->-The finite biomass and human nutrition
Finite animal stocks / The growth of world fisheries / Protein availability
Future marine exploitation (A): Improvements in a “sea-hunting” technology
Fish-finding and prediction / Trends in vessels and gear / Trends in processing
Future marine exploitation (B): Genesis of a “sea-farming” technology
Possible intermediate cropping / Fish-herding husbandry / The lessons of fish-ponds / True maritime farming
Recapitulation and implications
World population and food / Education and envoi
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