An analysis of factors governing productivity in lakes and reservoirs1
M. Brylinsky,K. H. Mann +1 more
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In this article, the International Biological Program (IBP) collected data from 43 lakes and 12 reservoirs, distributed from the tropics to the arctic, were subjected to statistical analysis to establish which factors are important in controlling production and how they are related.Abstract:
Data collected as part of the International Biological Program from 43 lakes and 12 reservoirs, distributed from the tropics to the arctic, were subjected to statistical analysis to establish which factors are important in controlling production and how they are related. In the whole body of data, variables related to solar energy input have a greater influence on production than variables related to nutrient concentration; in lakes within a narrow range of latitude, nutrient-related variables assume greater importance. Morphological factors have little influence on productivity per unit area in either case. Chlorophyll a concentration is a good indicator of nutrient conditions and when combined with an energyrelated variable constitutes a good estimator of primary production.read more
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Journal ArticleDOI
Cascading Trophic Interactions and Lake Productivity
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Recent advances in the understanding and management of eutrophication
TL;DR: In the years ahead, climate warming will aggravate eutrophication in lakes receiving point sources of nutrients, as a result of increasing water residence times, which will increasingly favor the replacement of diatoms by nitrogen-fixing Cyanobacteria as mentioned in this paper.
Book ChapterDOI
Secondary Production in Inland Waters 1
TL;DR: This chapter discusses a selected portion of aquatic production biology, secondary production in inland waters, and focuses on three groups, fishes, zoobenthos, and zooplankton, which have received most attention, and for which methodology has been best worked out.
Journal ArticleDOI
Cause-effect relationships in energy flow, trophic structure, and interspecific interactions
TL;DR: Pelagic ecosystems have more trophic levels as a result of selection for small rapidly growing primary producers, which cannot hold space in the fluid medium, in contrast to large space-occupying producers in the terrestrial environment.
References
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Book
Fundamentals of ecology
TL;DR: This book discusses the role of energy in Ecological Systems, its role in ecosystem development, and its implications for future generations of ecologists.
Journal ArticleDOI
The Estimation of Phytoplankton Production in the Ocean from Chlorophyll and Light Data1
TL;DR: In this article, the relationship between photosynthetic rate at light saturation and chlorophyll content in natural populations and cultures of marine phytoplankton was determined, and a mean value of 3.7 g C assimilated/hour/g chlorophyLL was obtained from the experimental results and from data present in the literature.
Journal ArticleDOI
A Hypothesis to Explain Differences and Similarities Among Lakes in the Experimental Lakes Area, Northwestern Ontario
TL;DR: A preliminary hypothesis is proposed to explain biological differences between Experimental Lakes Area (ELA) lakes in terms of simple morphometric and meteorological parameters, via their effect on nutrient supplies to the lakes.
Journal ArticleDOI
Indices of Productivity in British Columbia Lakes
T. G. Northcote,P. A. Larkin +1 more
TL;DR: No significant relation was found between intensity and length of growing season and quantities of plankton, bottom fauna or fish, although a significant relationship was demonstrated between summer epilimnion temperature and plankton.
Journal ArticleDOI
The Standing Crop of Fish in Lakes
TL;DR: In this article, an analysis of the published estimates of standing crops of fish in lakes and rivers was made using regression methods to determine whether certain environmental factors may affect standing crop, and an analysis was made, primarily by regression methods, of the estimated estimates of the standing crops.