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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.
Freunden der Natur, der Seen und der Meere erAffnet dieses Buch
einen Einblick in die oft mikroskopisch kleine Welt des
Planktons.
Zahlreiche Zeichnungen und Farbtafeln geben einen Eindruck von der
SchAnheit und Formenvielfalt vieler Plankter. Beispiele aus vielen
GewAssern der Erde zeigen, welch wichtige Rolle das Plankton in der
Nahrungskette spielt und wie es die StoffkreislAufe im Wasser und
sogar die AtmosphAre beeinfluAt.
SchlieAlich wird die Reaktion des Planktons auf die
GewAsserversauerung und die AoeberdA1/4ngung gezeigt und erklArt,
welches GefAhrdungspotential von Giftalgen ausgehen kann.
Das Plankton ist die am weitesten verbreitete Lebensgemeinschaft
der Erde. Seine Bedeutung fur die Wasserqualitat und als
Nahrungsbasis fur die Fischerei ist unbestritten.
Das vorliegende Lehrbuch stellt erstmals alle Aspekte der
Planktologie zusammenfassend dar, von einer taxonomischen Ubersicht
uber die physikalische und chemische Beschreibung des Lebensraums,
die Funktionsmorphologie, Ernahrungsphysiologie und
Populationsokologie bis hin zur Bedeutung des Planktons im
aquatischen Okosystem und in biogeochemischen Kreislaufen.
Besonderheiten des Buches sind die gemeinsame Behandlung des
Susswasser- und des Meeresplanktons, die Gliederung nach
Problemebenen sowie die Betonung vereinheitlichender Konzepte.
Exemplarisch werden fast alle grossen Fragen der allgemeinen
Okologie abgehandelt."
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).
This second edition builds upon the strengths of the first with
the structure of the book following the same hierarchical concept
of ecology, from habitat properties, individuals, populations,
coupled populations and communities to ecosystems. However, it has
been thoroughly revised throughout to incorporate findings from new
technologies and methods (notably the rapid development of
molecular genetic methods and stable isotope techniques) that have
allowed a rapid and ongoing development of the field. There is a
new emphasis on food webs, species diversity and ecosystem
functioning, climate change, and conservation management. Key
ecological questions are examined in the light of the latest
experimental evidence. Throughout the text evolutionary theory is
applied to an understanding of freshwater ecosystems, thereby
filling a niche between traditional limnology and evolutionary
ecology.
This accessible text is suitable for both undergraduate and
graduate students taking courses in limnology, freshwater ecology,
and aquatic biology as well as the many professional limnologists,
ecologists and conservation biologists requiring a concise but
authoritative overview of the topic.
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R1,150
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