Zooplankton succession on seasonal floodplains: surfing on a wave of food

Lindholm, Markus; Hessen, Dag O.

doi:10.1007/s10750-007-0713-7

Cited by 32 publications

(26 citation statements)

References 24 publications

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“…Floods also transport large amounts of nutrients to the floodplain (DINKA et al, 2006(DINKA et al, , 2011, leading to an increased primary production during the receding period. With shorter life cycles and quicker reproduction rates, rotifers could exploit the "wave of food" (LINDHOLM and HESSEN, 2007) better than microcrustaceans. Also suspended clay particles suppress rotifers less than microcrustaceans (KIRK and GILBERT, 1990).…”

Section: Discussionmentioning

confidence: 99%

Flood‐Pulse Effects on Zooplankton Assemblages in a River‐Floodplain System (Gemenc Floodplain of the Danube, Hungary)

Schöll

Kiss

Dinka

et al. 2012

International Review of Hydrobiology

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We studied the structure and population dynamics of zooplankton assemblages in the water bodies (eu-, para-, plesiopotamal and conjunctive water bodies) of a temperate floodplain during flood events. Here we report differences in the species composition of these water bodies in the two stages of flood pulses: rising vs. receding. During the receding period the proportion of larger and tychoplanktonic species increased. Similarity among zooplankton assemblages of these floodplain water bodies increased during the rising and decreased during the receding period. Species richness, diversity and population density values of zooplankton assemblages increased during the receding period in all types of water bodies except the eupotamal. The guild ratio of rotifer assemblages showed characteristic, but somewhat ambiguous changes. We conclude that the hydrological regime affects the structure and dynamics of zooplankton assemblages on the floodplain. IntroductionSpatial and temporal variability induces high productivity and biodiversity in terrestrial and aquatic components of the river-floodplain systems (SHIEL et al., 1998;ARMITAGE et al., 2003). Understanding the ecological functions of natural river-floodplain systems is important to establish criteria to protect the biota of these sites (BERCZIK and BUZETZKY, 2006). Introduction of the Flood Pulse Concept (JUNK et al., 1989) stimulated renewed interest in the connection between large rivers and their floodplains; since then numerous studies have focused on the zooplankton of large rivers. These efforts have indicated that inshore retention and hydrological connectivity are a major determinant of zooplankton assembly (HEIN et al., 1999;BARANYI et al., 2002;RECKENDORFER et al., 1999;ZIMMERMANN-TIMM et al., 2007). In contrast, most hydro-ecological research projects on large rivers and their floodplains focus just on fish and/or benthic invertebrate assemblages, thus neglecting the importance of zooplankton communities in the food-web of river-floodplain systems. Concomitantly an assessment of their suitability as a biomonitoring tool is also neglected (BORJA et al., 2008;RESH, 2008

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Section: Discussionmentioning

confidence: 99%

Flood‐Pulse Effects on Zooplankton Assemblages in a River‐Floodplain System (Gemenc Floodplain of the Danube, Hungary)

Schöll

Kiss

Dinka

et al. 2012

International Review of Hydrobiology

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“…The exchange between the persistent rooted emergent macrophyte beds and open waters when the water level rises, which has been recognised as the principal factor for zooplankton colonization (Crome and Carpenter 1988;Bonecker and Lansac-Tôha 1996), may have played a significant role in our study case. On the other hand, the hatching of zooplankton eggs and resting stages from sediments could also be a source of organisms and responsible for the increase in zooplankton richness (Lindholm and Hessen 2007;Panarelli et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Zooplankton succession during extraordinary drought–flood cycles: A case study in a South American floodplain lake

et al. 2011

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a b s t r a c tWe examined the zooplankton abundance and composition of Laguna Grande, a floodplain wetland of the Lower Paraná Basin (Argentina), during an extraordinary drought-flood cycle that affected both the environment and the biological conditions of the lake. Low waters were characterised by remarkably high conductivities and pH values, and high phytoplankton and bacterioplankton abundances with cyanobacterial blooms, while high waters showed opposite features. In relation to zooplankton, the mean abundances of all the taxonomic groups (rotifers, cladocerans, copepods, ciliates, and heterotrophic nanoflagellates) were slightly higher at low waters. Major changes were observed in the specific composition of metazooplankton: the euryhaline species assemblage that dominated in the dry warm period was replaced by several oligohaline littoral and planktonic species characteristic of the Paraná River Basin, when the water level rose. Mean species richness values at high waters doubled those of low waters and were directly correlated to water depth. Most of the rotifers of the genus Brachionus and the cladoceran Moina micrura switched from parthenogenetic to sexual reproduction during low waters, as a response to a harsh environment and crowding. We suggest that the main changes in the environmental conditions in this eutrophic floodplain lake are driven by the hydrology, which regulates the zooplankton succession. The herein described shifts in the zooplankton structure and dynamics of Laguna Grande over an extraordinary drought-flood cycle contribute to the understanding of the processes that might occur under the scenarios predicted by climate change models.

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“…In some cases, resolution of mixing models can be further improved by manipulation of the dietary isotopic composition, for example by feeding prey with C 3 and C 4 plant meals (Schlechtriem et al, 2004) or culturing algae with tank CO 2 , but remaining within the normal range of values for natural samples. Gamboa-Delgado, unpublished Spero et al, 1993Spero et al, 1993Spero et al, 1993Spero et al, 1993Power et al, 2003Lindholm and Hessen, 2007 Nematodes…”

Section: Natural Stable Isotopes Versus Enriched Stable Isotope Tracersmentioning

confidence: 99%

Naturally-occurring stable isotopes as direct measures of larval feeding efficiency, nutrient incorporation and turnover

Vay

Gamboa‐Delgado

2011

Aquaculture

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Stable isotopes are non-hazardous markers that have been widely-used in assessing energy flow within aquatic ecosystems. Hatchery systems are also highly amenable to this approach, as they represent controlled mesocosms with a limited number of food sources and short planktonic food chains with rapid and measurable bioaccumulation of the heavier stable isotopes of carbon and nitrogen at each trophic step. Differences in the natural isotopic composition of dietary components may be used to provide direct integrated measures of ingestion, nutrient incorporation and growth through development under normal feeding and environmental conditions, in either the laboratory or the hatchery. Simple isotopic mixing models allow estimation of relative utilisation of inert diets and live feeds, and individual components of compound feeds. Such experiments have investigated the effectiveness of cofeeding regimes, optimal timing of live food transitions (eg from rotifers to Artemia), presentation of inert diets, optimal size/age for weaning and incorporation of specific dietary components. Furthermore, time-series measurement of changes in tissue isotopic signature (δ 15 N, δ 13 C) enables modelling of growth dilution and tissue turnover components of isotopic change driven by nutritional sources. These measures need to take into account the difference in isotope values that is typically observed between the diet and consumer (isotopic discrimination factor, ∆). In marine larvae and early post-larvae, ∆ 13 C and ∆ 15 N have been found to range widely, from 0.4-4.1‰ and 0.1-5.3‰ respectively. The observation of such a high level of variation within species and life stages indicates a strong effect of diet quality on isotopic discrimination. Elucidating mechanisms underlying such observations, and much greater resolution in larval nutritional studies, can be achieved by application of rapidlydeveloping techniques for compound specific stable isotope analysis in tracing the transfer of dietary sources of carbon and nitrogen into tissue components. Fast growing aquatic larvae represent excellent model organisms exhibiting rapid transitions in isotopic composition in 3 response to diet, rapidly changing feeding behaviour and transitions in trophic level with ready ingestion of modifiable experimental diets in short and controlled food chains. Thus results of studies of the effects of diet composition, developmental stage, growth rates or environmental conditions on stable isotope incorporation will be of broad relevance not only in terms of larval nutrition but can also more broadly inform the design and interpretation of ecological studies.

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Zooplankton succession on seasonal floodplains: surfing on a wave of food

Cited by 32 publications

References 24 publications

Flood‐Pulse Effects on Zooplankton Assemblages in a River‐Floodplain System (Gemenc Floodplain of the Danube, Hungary)

Flood‐Pulse Effects on Zooplankton Assemblages in a River‐Floodplain System (Gemenc Floodplain of the Danube, Hungary)

Zooplankton succession during extraordinary drought–flood cycles: A case study in a South American floodplain lake

Naturally-occurring stable isotopes as direct measures of larval feeding efficiency, nutrient incorporation and turnover

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