Trophic structure in the pelagial of 25 shallow New Zealand lakes: changes along nutrient and fish gradients

Jeppesen, Erik; Lauridsen, Torben L.; Mitchell, Stuart F.; Christoffersen, Kirsten; Burns, Carolyn W.

doi:10.1093/plankt/22.5.951

Cited by 128 publications

(91 citation statements)

References 48 publications

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“…These results would agree partially with first descriptions for zooplanktonic crustaceans in Aysen region that reported a kind of a transitional pattern where it is possible to found species from northern and southern Patagonia (Menu-Marque et al 2000;De los Ríos, 2008). An example can be the presence of three amphipods species: H. chiloensis that is found between 36°-45° S, H. simplex that is found between 38-55° S and H. simplex between 39-53° S (De los Ríos-Escalante et al, 2012).…”

Section: Discussionsupporting

confidence: 92%

“…For example, large lakes, small lakes and shallow ponds of Torres del Paine microcrustacean species associations are regulated by conductivity and the trophic status (Soto and De los Ríos, 2006;De los Ríos and Soto, 2009). This pattern is similar to the one described for lakes and ponds in Argentinean Patagonia (Modenutti et al 1998) and also with descriptions for New Zealand lakes (Jeppensen et al 1997(Jeppensen et al , 2000. From this point of view microcrustacean assemblages are not random, regulatory, or deterministic factors exists to explain the community structure.…”

Section: Introductionsupporting

confidence: 88%

“…The studied region is located at 46° S (Aysen region, Chile, Figure 1), and it is characterized by the presence of a variety of landscapes, valleys, mountains, lakes, rivers and ponds (Niemeyer and Cereceda, 1984). Within the inland water bodies there are large and deep lakes, small lakes, shallow permanent and ephemeral pools, and rivers (Niemeyer and Cereceda, 1984;De los Ríos-Escalante, 2010).…”

Section: Methodsmentioning

confidence: 99%

“…Within the inland water bodies there are large and deep lakes, small lakes, shallow permanent and ephemeral pools, and rivers (Niemeyer and Cereceda, 1984;De los Ríos-Escalante, 2010). This region is difficult to access due to the marked isolation that is an advantage because these ecosystems are practically pristine but the disadvantage is that it is difficult to carry out systematic field works due to geographical and climatic features (De los Ríos, 2008).…”

Section: Methodsmentioning

confidence: 99%

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Inland water microcrustacean assemblages in an altitudinal gradient in Aysen region (46° S, Patagonia Chile)

2014

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The Chilean Patagonia has numerous kinds of inland water ecosystems such as lakes, ponds, wetlands and rivers that have been poorly studied due to access difficulties. This study was carried out in Aysen region, in southern Chile, and it included different kinds of water bodies such as rivers, streams, ponds, lagoons and lakes distributed along an altitudinal gradient at 46° S. It was found a low species number, essentially cladocerans, copepods and amphipods. A null model was applied in order to determine the existence of regulator factors of species associations, and the results revealed that they are not random. The patterns would be influenced by geographical and limnological characteristics of the studied sites. Our results would agree with regional studies on habitat heterogeneity such as in Torres del Paine National Park and other zones in Tierra del Fuego island.Keywords: microcrustaceans, Boeckella, Hyalella, null models, Patagonia Crustáceos zooplâncton de águas continentais litorales na gradiente de altitude na região de Aysén (46 ° S, Patagônia Chile) ResumoA Patagônia chilena apresenta numerosos tipos de ecossistemas aquáticos, como lagos, lagoas, pântanos e rios, os quais tem sido pouco estudados devido a dificuldades de acesso. Este estudo foi feito na região de Aysén, no sul do Chile, e inclui diferentes tipos de corpos d'água, tais como rios, córregos, lagos, lagoas e lagos distribuídos ao longo de um gradiente de altitude a 46° S. Constatou-se baixo número de espécies que inclui, essencialmente, cladóceros, copépodos e anfípodos. Um modelo nulo foi aplicado para determinar a existência de fatores reguladores das associações de espécies os resultados indicam que estes não são aleatórios. Os padrões poderiam ser influenciados pelas características geográficas e limnológicas do locais estudados. Os resultados expostos concordariam com estudos regionais sobre com habitats heterogeneidade como Torres del Paine Parque Nacional e outras zonas na ilha de Tierra del Fuego.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionsupporting

confidence: 88%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Inland water microcrustacean assemblages in an altitudinal gradient in Aysen region (46° S, Patagonia Chile)

2014

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“…The literature indicates that chlorophyll and conductivity would be the main regulator factors in crustacean assemblages in Chilean lakes and ponds (De los Ríos-Escalante, 2010), and similar results are found in Argentinean lakes (Quiros and Drago, 1999). Although the present results did not include chlorophyll concentration, the presence of daphnid cladocerans, such as D. ambigua and C. dubia, and cyclopoid copepods would indicate the presence of relatively moderate chlorophyll concentrations (Jeppesen et al, 1997(Jeppesen et al, , 2000De los Ríos and Soto, 2009;De los Ríos-Escalante, 2010). These results would not be supported by the inverse relation between C. dubia and B. gracilis, since calanoid copepods are more dominant than daphnid cladocerans in markedly oligotrophic environments in southern Argentinean and Chilean lakes (Modenutti et al, 1998;De los Ríos and Soto, 2009;De los Ríos-Escalante, 2010), and likewise in New Zealand lakes (Jeppesen et al, 1997(Jeppesen et al, , 2000.…”

Section: Discussionsupporting

confidence: 76%

Crustacean communities in coastal ephemeral pools in the Araucanía region (38° S, Chile)

Ríos-Escalante

Acevedo

2016

Braz. J. Biol.

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The fauna communities of ephemeral pools in southern Chile are characterized by heterogeneity of crustacean taxa; nevertheless, no detailed studies exist of their community structure. The aim of the present study was to analyze the crustacean community structure in two groups of ephemeral pools (Puaucho and Nigue pools) in the coastal zone of the Araucanía region. A correlation matrix was made by species abundance against temperature, conductivity, pH and total dissolved solids. In a second step, a null model for species co-occurrence was applied to the total data and to each group. The results for total data revealed a significant direct relation between the abundance of H. costera, C. dubia and Mesocyclops. For the Puaucho pools, the same results were found together with direct associations with total dissolved solids, conductivity and pH. Finally, different results were found for the Nigue pools, with no clear significant associations, either direct or indirect, between the abundance of different crustacean taxa and abiotic parameters. These results were supported by the co-occurrence null model analysis, which revealed the presence of regulator factors for the total data, and for each of the two groups. Ecological topics are discussed with emphasis on meta-community dynamics.Keywords: cladocerans, copepods, ostracods, amphipods, communities. Comunidades de crustáceos em lagoas efêmeras costeiras na região de Araucanía (38° S, Chile) ResumoAs comunidades faunísticas das lagoas efêmeras do sul do Chile são caracterizadas pela heterogeneidade dos seus táxons. Entretanto, estudos detalhados da sua estrutura de comunidade ainda não existem. O objetivo do presente estudo foi analisar a estrutura da comunidade de crustáceos em dois grupos de lagoas efêmeras (Puaucho e Nigue) na zona costeira da região de Araucanía. A matriz de correlação foi feita com a abundância das espécies em função da temperatura, condutividade, pH e sólidos totais dissolvidos. Num segundo passo, um modelo nulo para as espécies de coocorrência foi aplicado aos dados totais e para cada grupo. Os resultados para os dados totais revelaram uma relação direta e significativa entre a abundância de H. costera, C. dubia e Mesocyclops. Para as lagoas Puaucho, os mesmos resultados foram encontrados, juntamente com associações diretas com sólidos totais dissolvidos, condutividade e pH. Finalmente, diferentes resultados foram encontrados para as lagoas Nigue, sem associações significativas claras, diretas ou indiretas entre a abundância de diferentes táxons de crustáceos e parâmetros abióticos. Estes resultados foram suportados pela análise de modelo de coocorrência nula, a qual revelou a presença de fatores reguladores para o total de dados, e para cada um dos dois grupos. Temas ecológicos são discutidos com ênfase na dinâmica de meta-comunidade.

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Protozoan Ciliates in Freshwater Ecosystems

Crisman

2003

Encyclopedia of Environmental Microbiology

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Sampling and Laboratory Approaches Seasonality Relation of Ciliate Biomass and Size to Trophic State Control of Ciliate Populations Nutrient Cycling Mixotrophy Ciliates and the Microbial Loop Ciliates as Early Warning Bioindicators of Ecosystem Change

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Trophic structure in the pelagial of 25 shallow New Zealand lakes: changes along nutrient and fish gradients

Cited by 128 publications

References 48 publications

Inland water microcrustacean assemblages in an altitudinal gradient in Aysen region (46° S, Patagonia Chile)

Inland water microcrustacean assemblages in an altitudinal gradient in Aysen region (46° S, Patagonia Chile)

Crustacean communities in coastal ephemeral pools in the Araucanía region (38° S, Chile)

Protozoan Ciliates in Freshwater Ecosystems

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