Use of null models to explain crustacean zooplankton assemblages in waterbodies of Alerce Andino National Park (41°S, Chile)

Use of null models to explain crustacean zooplankton assemblages in waterbodies of Alerce Andino... INTRODUCTION The zooplankton assemblages in deep, oligotrophic northern Patagonian lakes are characterized by their low species numbers and their marked dominance of calanoid copepods (Soto & Zúñiga, 1991; De los Ríos & Soto, 2006, 2007; De los Ríos-Escalante, 2011). Studies on littoral microcrustaceans in Chilean lakes are restricted to copepods and cladocerans (Araya & Zúñiga, 1985; Soto & Zúñiga, 1991), and it is probable that other crustaceans, like amphipods, are present (González, 2003) as well. Nevertheless, a correlation between total microcrustaceans (littoral and pelagic) and trophic status has not been determined until now (De los Ríos et al., 2007; De los Ríos & Roa, 2010). However, it is not clear whether there exists a regulating factor for the observed pelagic and littoral microcrustacean assemblages in lakes with a similar trophic status. To study the presence of a regulating factor, ecologists have proposed null models using presence/absence data in order to find out whether the observed distribution pattern is random or not (Gotelli, 2000, 2001; Tondoh, 2006; Tiho & Johens, 2007; Gotelli & Entsminger, 2009). Although null models have mostly been applied to terrestrial ecosystems until now (Tondoh, 2006; Tiho & Johens, 2007), recently they were also extended to http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crustaceana Brill

Use of null models to explain crustacean zooplankton assemblages in waterbodies of Alerce Andino National Park (41°S, Chile)

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Publisher
Brill
Copyright
© Koninklijke Brill NV, Leiden, The Netherlands
Subject
Articles
ISSN
0011-216x
eISSN
1568-5403
DOI
10.1163/156854012X643933
Publisher site
See Article on Publisher Site

Abstract

INTRODUCTION The zooplankton assemblages in deep, oligotrophic northern Patagonian lakes are characterized by their low species numbers and their marked dominance of calanoid copepods (Soto & Zúñiga, 1991; De los Ríos & Soto, 2006, 2007; De los Ríos-Escalante, 2011). Studies on littoral microcrustaceans in Chilean lakes are restricted to copepods and cladocerans (Araya & Zúñiga, 1985; Soto & Zúñiga, 1991), and it is probable that other crustaceans, like amphipods, are present (González, 2003) as well. Nevertheless, a correlation between total microcrustaceans (littoral and pelagic) and trophic status has not been determined until now (De los Ríos et al., 2007; De los Ríos & Roa, 2010). However, it is not clear whether there exists a regulating factor for the observed pelagic and littoral microcrustacean assemblages in lakes with a similar trophic status. To study the presence of a regulating factor, ecologists have proposed null models using presence/absence data in order to find out whether the observed distribution pattern is random or not (Gotelli, 2000, 2001; Tondoh, 2006; Tiho & Johens, 2007; Gotelli & Entsminger, 2009). Although null models have mostly been applied to terrestrial ecosystems until now (Tondoh, 2006; Tiho & Johens, 2007), recently they were also extended to

Journal

CrustaceanaBrill

Published: Jan 1, 2012

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