Do planktivorous fish structure the zooplankton communities in New Zealand lakes?

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

doi:10.1080/00288330.1997.9516755

Cited by 71 publications

(53 citation statements)

References 40 publications

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“…III and Fig. 1), agrees with previous descriptions for lakes in Chilean Patagonia (SOTO & ZÚÑIGA 1991, DE LOS RÍOS & SOTO 2007b, DE LOS RÍOS et al 2007, and New Zealand (JEPPENSEN et al 1997(JEPPENSEN et al , 2000. Nevertheless, the present study did not find associations between species number and chlorophyll concentration (Fig.…”

Section: Discussionsupporting

confidence: 82%

Species assemblages of zooplanktonic crustaceans in mountain shallow ponds of Chile (Parque Cañi)

Ríos

Roa²

2010

Zoologia (Curitiba, Impr.)

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Even though the Chilean lakes are characterized by their oligotrophy, a transition from oligotrophy to mesotrophy, due human intervention, has been reported in some lakes. Nevertheless, there are still some pristine and unpolluted small lakes and ponds in mountain zones, free of human intervention and surrounded by native forests. Nine unpolluted, oligotrophic and pristine water bodies located in Cañi Park, a mountain zone with altitudes between 1000 to 1500 m a.s.l and forests where Nothofagus dombeyi, N. pumilio and Araucaria araucana predominate, were studied. For each sampled lake, zooplankton was collected and environmental parameters were obtained (conductivity, total dissolved solids, and chlorophyll concentration). A null model of species co-occurrence was applied to determine randomness in species associations. All sites revealed low species richness (< 6); the calanoid copepod Boeckella gracilis Daday, 1902 was present in all sites. The results of the null model indicated randomness or absence of regulatory factors in species associations. Only few species occur in practically all localities. Also, a significant inverse association between chlorophyll concentration with percentage of calanoid copepods and a weak direct association between chlorophyll concentration and percentages of cladocerans were found

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Section: Discussionsupporting

confidence: 82%

Species assemblages of zooplanktonic crustaceans in mountain shallow ponds of Chile (Parque Cañi)

Ríos

Roa²

2010

Zoologia (Curitiba, Impr.)

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“…The direct association between daphnids and cyclopoids percentage associated to chlorophyll increase was described for Chilean North Patagonian lakes (Woelfl, 2007;De los Ríos-Escalante, 2010). Similar results were described for New Zealand lakes that have similar latitude and geographical characteristics of Nothofagus forests (Jeppesen et al, 1997(Jeppesen et al, , 2000.…”

Section: Discussionsupporting

confidence: 74%

Plankton crustaceans in bays with different trophic status in Llanquihue lake (41° S Chile)

Escalante

Soto²,

Santander-Massa

et al. 2017

Braz. J. Biol.

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The Llanquihue lake is included in the called Araucanian or Nord Patagonian lakes located between 38-41° S. These lakes are characterized by their oligo-mesotrophic status due to human intervention which takes to the increase in nutrients inputs from industries and towns. Effects on zooplankton assemblages are observed with marked increase of daphnids abundance. The aim of the present study is to analyze the trophic status and zooplankton relative abundance in different bays of Llanquihue lake. It was found direct associations between chlorophyll a with daphnids percentage, total dissolved nitrogen with reactive soluble phosphorus nitrogen/phosphorus molar radio with cyclopoids percentage, and an inverse relation between daphnids and calanoids percentages. The occurrence of three kinds of microcrustacean assemblages and environmental conditions was evidenced: the first one with high calanoids percentage, low species number and low chlorophyll and nutrients concentration, a second with moderate chlorophyll and nutrients concentration and moderate daphnids percentage; high species number and a third site with high chlorophyll and nutrients concentration, high daphnids percentage and high species number. Daphnids increase under mesotrophic status, agree with similar results observed for southern Argentinean and New Zealand lakes.

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“…This shift has been related to changes in food particle size spectra (Pace 1986) or predation (Jeppesen et al 1997b). Despite the fact that with increasing trophic state increased phytoplankton abundance can directly stimulate increased abundance of herbivorous zooplankters, we found a slightly positive relationship between calanoids and chlorophyll a but a clearly negative effect of other food resources on calanoids.…”

Section: Discussioncontrasting

confidence: 42%

Analyzing the importance of top-down and bottom-up controls in food webs of Chinese lakes through structural equation modeling

García‐Berthou

Wang

et al. 2015

Aquat Ecol

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Zooplankton is generally affected by both top-down and bottom-up regulations in aquatic ecosystems. However, the relative strength of topdown and bottom-up control's on zooplankton assemblages is not well understood. Here, we analyzed this question in five lakes of the Yangtze River basin, an area with high population density and thousands of lakes, many of them suffering multiple environmental pressures. We sampled the whole communities of five lakes in the middle reaches of Yangtze River basin from 2006 to 2011 and used structural equation modeling to evaluate the relative importance of joint top-down and bottom-up effects. With increasing total phosphorous (TP), a major shift occurred in trophic structure. Biomass of phytoplankton, rotifers, cyclopoids, and planktivorous fish significantly increased, while cladocerans and calanoids were negatively correlated with increasing TP. The bottom-up effects were strongest at the bottom of the food web (e.g., effects of TP on phytoplankton). Direct bottom-up effects of phytoplankton and other food resources (latent variable) on rotifers and cyclopoids were greater than top-down controls from planktivores. The predation pressure on crustacean zooplankton by planktivores was higher than that on rotifers. In planktivore-dominated systems, piscivores only played a marginal role, whereas they seem affected by water quality. These results suggest not only in the food web processes the important role of nutrient pollution in affecting the top of the food web in these lakes, but also that the impacts and relative strength of bottom-up and top-down controls may vary with zooplankton assemblages, indicating the complexity of food webs in degraded lakes in China.

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Do planktivorous fish structure the zooplankton communities in New Zealand lakes?

Cited by 71 publications

References 40 publications

Species assemblages of zooplanktonic crustaceans in mountain shallow ponds of Chile (Parque Cañi)

Species assemblages of zooplanktonic crustaceans in mountain shallow ponds of Chile (Parque Cañi)

Plankton crustaceans in bays with different trophic status in Llanquihue lake (41° S Chile)

Analyzing the importance of top-down and bottom-up controls in food webs of Chinese lakes through structural equation modeling

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