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The question "Why are there so many species?" has puzzled ecologist for a long time. Initially, an academic question, it has gained practical interest by the recent awareness of global biodiversity loss. Species diversity in local ecosystems has always been discussed in relation to the problem of competi tive exclusion and the apparent contradiction between the competitive exclu sion principle and the overwhelming richness of species found in nature. Competition as a mechanism structuring ecological communities has never been uncontroversial. Not only its importance but even its existence have been debated. On the one extreme, some ecologists have taken competi tion for granted and have used it as an explanation by default if the distribu tion of a species was more restricted than could be explained by physiology and dispersal history. For decades, competition has been a core mechanism behind popular concepts like ecological niche, succession, limiting similarity, and character displacement, among others. For some, competition has almost become synonymous with the Darwinian "struggle for existence", although simple plausibility should tell us that organisms have to struggle against much more than competitors, e.g. predators, parasites, pathogens, and envi ronmental harshness.
All relevant ecological aspects of plankton, especially seasonal changes in the species composition, the role of competition for limiting resources in species replacements, the role of parasitism, predation and competition in seasonal succession are treated in detail considering phytoplankton, zooplankton and bacteroplankton. In addition to its use as a valid reference book for plankton ecology, this monograph may well be used as a model for other kinds of ecological communities.
Das Meer ist der groesste Lebensraum der Erde - hier hat die Evolution der Organismen begonnen, und hier findet sich auch die groesste Vielfalt organismischer Bauplane. Lernfreundlich aufbereitet und leicht verstandlich geschrieben, gibt das Lehrbuch einen grundlegenden und umfassenden UEberblick uber die verschiedenen Lebensraume und Lebensgemeinschaften des Meeres. OEkologische Prozesse wie Konkurrenz, Fressbeziehungen, Symbiosen und Nahrungsnetze sind zentrale Themen. Zahlreiche Abbildungen regen zum Lesen und Lernen an.
This concise, readable introduction to limnology (the science of
investigating the structure and function of inland waters), places
the subject in the context of modern ecology. Unlike most
ecological textbooks, which use examples taken almost exclusively
from terrestrial systems, this book integrates the fields of
limnology and ecology by presenting empirical data drawn entirely
from freshwater ecosystems in order to advance ecological theories
(limnoecology).
Freunden der Natur, der Seen und der Meere erAffnet dieses Buch
einen Einblick in die oft mikroskopisch kleine Welt des
Planktons.
Das Plankton ist die am weitesten verbreitete Lebensgemeinschaft
der Erde. Seine Bedeutung fur die Wasserqualitat und als
Nahrungsbasis fur die Fischerei ist unbestritten.
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