Titlebook: Eutrophication of Freshwaters; Principles, problems David Harper Book 1992 Springer Science+Business Media Dordrecht 1992 Eutrophication.al

somnambulism

https://doi.org/10.1007/978-94-017-1354-2 are indirect through an alteration in the amount, or relative abundance, and nature (e.g. size or nutritional content) of their food supply, which may alter the balance between competitors for the overall food resources. These effects may occur at every consumer level — herbivores, detritivores and predators.

ALTER

HALL

Book 1992n some instances. They are not widespread however, and where they are feasible, they are often expensive and may be politically difficult to implement. In the last decade, attention has focussed upon less expensive lake manipula- tion techniques, such as destratification and biomanipulation, which a

狂亂

Contracture

JIBE

The reduction of causes and the management of effects of eutrophication,sure of many water bodies to public recreation such as fishing and boating. In contrast, European countries such as Sweden and Switzerland have legislated to restrict both detergent phosphorus content and effluent phosphorus concentration; similar legislation exists in America and South Africa.

Mindfulness

goodwill

The biochemical manifestations of eutrophication,tant biological components (Fig. 1.5). Each nutrient follows different pathways and fluxes through the components which are themselves affected by external changes in nutrient loadings upon the system. The rates of flux are driven by biological processes, which are considered in their own right in C

hypotension

LARK

The engineering, economic and social effects of eutrophication,nterests, are affected by its consequences. Thus the earliest recorded manifestations of eutrophication in Europe and North America were in those lakes which were utilised as important sources of potable water and commercial fisheries, such as lakes Zurich and Erie. Over the past two decades in deve