Universität zu Köln

Weisse, Thomas ORCID: 0000-0001-6103-6558, Anderson, Ruth ORCID: 0000-0001-6652-987X, Arndt, Hartmut ORCID: 0000-0003-2811-3595, Calbet, Albert ORCID: 0000-0003-1069-212X, Hansen, Per Juel ORCID: 0000-0003-0228-9621 and Montagnes, David J. S. (2016). Functional ecology of aquatic phagotrophic protists - Concepts, limitations, and perspectives. Eur. J. Protistol., 55. S. 50 - 75. MUNICH: ELSEVIER GMBH. ISSN 1618-0429

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Abstract

Functional ecology is a subdiscipline that aims to enable a mechanistic understanding of patterns and processes from the organismic to the ecosystem level. This paper addresses some main aspects of the process-oriented current knowledge on phagotrophic, i.e. heterotrophic and mixotrophic, protists in aquatic food webs. This is not an exhaustive review; rather, we focus on conceptual issues, in particular on the numerical and functional response of these organisms. We discuss the evolution of concepts and define parameters to evaluate predator prey dynamics ranging from Lotka-Volterra to the Independent Response Model. Since protists have extremely versatile feeding modes, we explore if there are systematic differences related to their taxonomic affiliation and life strategies. We differentiate between intrinsic factors (nutritional history, acclimatisation) and extrinsic factors (temperature, food, turbulence) affecting feeding, growth, and survival of protist populations. We briefly consider intraspecific variability of some key parameters and constraints inherent in laboratory microcosm experiments. We then upscale the significance of phagotrophic protists in food webs to the ocean level. Finally, we discuss limitations of the mechanistic understanding of protist functional ecology resulting from principal unpredictability of nonlinear dynamics. We conclude by defining open questions and identifying perspectives for future research on functional ecology of aquatic phagotrophic protists. (C) 2016 The Authors. Published by Elsevier GmbH.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Weisse, Thomas UNSPECIFIED orcid.org/0000-0001-6103-6558 UNSPECIFIED Anderson, Ruth UNSPECIFIED orcid.org/0000-0001-6652-987X UNSPECIFIED Arndt, Hartmut UNSPECIFIED orcid.org/0000-0003-2811-3595 UNSPECIFIED Calbet, Albert UNSPECIFIED orcid.org/0000-0003-1069-212X UNSPECIFIED Hansen, Per Juel UNSPECIFIED orcid.org/0000-0003-0228-9621 UNSPECIFIED Montagnes, David J. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-268826
DOI:	10.1016/j.ejop.2016.03.003
Journal or Publication Title:	Eur. J. Protistol.
Volume:	55
Page Range:	S. 50 - 75
Date:	2016
Publisher:	ELSEVIER GMBH
Place of Publication:	MUNICH
ISSN:	1618-0429
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FLUORESCENTLY-LABELED ALGAE; SMALL-SCALE TURBULENCE; PREY SIZE SELECTION; FRESH-WATER; GROWTH-RATES; FOOD QUALITY; FEEDING-BEHAVIOR; LIGHT-INTENSITY; GRAZING RATES; FRAGILIDIUM-SUBGLOBOSUM Multiple languages Microbiology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26882