Fish manipulation as a lake restoration tool in shallow, eutrophic temperate lakes 1: cross-analysis of three Danish case-studies

Jeppesen, Erik; Søndergaard, Martin; Mortensen, Erik Lykke; Kristensen, Peter; Riemann, Bo; Jensen, H.J.; Müller, J. P.; Sortkjær, Ole; Jensen, Jens Peder; Christoffersen, Kirsten; Bosselmann, Suzanne; Dall, E.

doi:10.1007/bf02530340

Cited by 105 publications

(28 citation statements)

References 39 publications

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“…Given the great variation in DO and pH levels possible at the sediment-water interface (e.g., Mortimer 1941;Jeppesen et al 1990;Stoddard et al 1999) and their relation to nutrient and acid pollution, the experimental results reported here are important for understanding the establishment of B. longimanus across the North American landscape. Nonetheless, it is important to note that B. longimanus within a single lake may be locally adapted to the conditions of that environment, and the present study only tested the response of eggs from a single reservoir where B. longimanus has existed for over a decade.…”

Section: The Role Of Naturementioning

confidence: 94%

“…Undersaturated oxygen conditions can influence emergence patterns of at least some cladoceran taxa (Arnott and Yan 2002), and anoxia inhibits development and metabolism of diapausing Artemia cysts (Hofmann and Hand 1990;Clegg 1997). Further, in many naturally productive lakes, elevated pH (9 to 11) is observed (Mortimer 1941;Jeppesen et al 1990), which is toxic to some zooplankton (Vijverberg et al 1996). Anthropogenic influences have also altered the pH of lakes across the native and introduced range of B. longimanus, resulting in both acidic (Wright et al 1980;Eilers and Selle 1991) and basic conditions at the sediment surface (Yan et al 1996;Arnott and Yan 2002).…”

Section: Introductionmentioning

confidence: 95%

“…The chemical and biological conditions of lake sediments (i.e., dissolved oxygen (DO) concentration, reduction-oxidation byproducts (such as CO 2 , CH 4 , and SO 4 ), pH, temperature, sedimentation rates, predation, and bacterial and fungal attack) may impact the success of the resting stage of B. longimanus, as these conditions influence resting egg hatching success and neonate condition for other zooplankton species (Arnott and Yan 2002;Cáceres and Tessier 2003). The hypolimnetic environments of productive lakes are commonly hypoxic or anoxic and have non-neutral pH conditions (e.g., Boström et al 1982;Jeppesen et al 1990). Undersaturated oxygen conditions can influence emergence patterns of at least some cladoceran taxa (Arnott and Yan 2002), and anoxia inhibits development and metabolism of diapausing Artemia cysts (Hofmann and Hand 1990;Clegg 1997).…”

Section: Introductionmentioning

confidence: 98%

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Nature and nurture in dormancy: dissolved oxygen, pH, and maternal investment impact Bythotrephes longimanus resting egg emergence and neonate condition

Brown

2008

Can. J. Fish. Aquat. Sci.

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Bythotrephes longimanus (Onychopoda: Cercopagidae), an invasive zooplankter in North America, requires suitable habitat to satisfy its planktonic and resting stages, which occupy the pelagia and sediment of lakes, respectively. Thousands of resting eggs from hundreds of planktonic mothers were exposed to laboratory conditions that mimicked gradients observed in lake sediment (dissolved oxygen = 1.4-11.9 mgÁL -1 ; pH = 3-11). Eggs hatched in all treatments, which confirms the utility of dormancy and the robustness of the resting egg in B. longimanus. However, hatching success and neonate condition were greatest when dormancy conditions were maintained at near-saturated dissolved oxygen and nearneutral pH; deviations from these conditions resulted in prolonged development, smaller neonates, and the failure of many eggs to hatch. In addition to the influence of environmental conditions, heavier mothers produced larger eggs that hatched more frequently and resulted in heavier neonates. These maternal effects are likely due to greater energy investment by healthier mothers. This study suggests that nature and nurture influence dormancy success, and the results underscore that both life-cycle stages of B. longimanus need to be considered to understand its range expansion.Résumé : Bythotrephes longimanus (Onychopoda: Cercopagidae), un organisme zooplanctonique envahissant en Amérique du Nord, requiert un habitat adéquat pour répondre aux besoins de ses stades planctoniques et son stade de repos qui vivent respectivement dans la zone pélagique et les sédiments des lacs. Nous avons exposé des milliers d'oeufs de repos provenant de centaines de mères planctoniques à des conditions de laboratoire qui miment les gradients observés dans les sédiments lacustres (oxygène dissous = 1,4-11,9 mgÁL -1 ; pH = 3-11). Les oeufs ont éclos dans toutes les conditions expér-imentales, ce qui confirme l'importance de la dormance et la robustesse des oeufs de repos chez B. longimanus. Cependant, le succès de l'éclosion et la condition des nouveau-nés sont meilleurs lorsque les conditions de dormance se maintiennent à un niveau d'oxygène dissous s'approchant de la saturation et à un pH près de la neutralité; les écarts à partir de ces conditions ont pour résultat, un développement prolongé, une taille réduite des nouveau-nés et un insuccès de l'éclosion chez de nombreux oeufs. En plus de l'influence des conditions du milieu, les mères plus lourdes produisent des oeufs plus grands qui ont un taux d'éclosion plus élevé et donnent des nouveau-nés plus lourds. Ces effets maternels sont vraisemblablement dus à un investissement énergétique plus important par des mères en meilleure santé. Notre étude laisse croire que la nature et les conditions d'élevage influencent le succès de la dormance; nos résultats soulignent qu'il est néc-essaire de considérer les deux étapes du cycle biologique de B. longimanus pour comprendre l'expansion de son aire de ré-partition.[Traduit par la Rédaction]

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Section: The Role Of Naturementioning

confidence: 94%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 98%

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Nature and nurture in dormancy: dissolved oxygen, pH, and maternal investment impact Bythotrephes longimanus resting egg emergence and neonate condition

Brown

2008

Can. J. Fish. Aquat. Sci.

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“…Empirical studies undertaken both in temperate and subtropical areas have shovv'n that water transparency is generally high in lakes with a macrophyte coverage or PVI (per cent volume infested, Canfield et al, 1984) exceeding 30%, irrespective of nutrient concentrations in the lake water {Canfield et al, 1984;Jeppesen et al, 1990;Canfield & Hoyer, 1992). Numerous explanations for the clearwater stage of macrophyte-rich lakes have been suggested, including that grazing pressure on algae (and consequently transparency) is enhanced because cladocerans are able to use the macrophytes as a daytime refuge against predation by fish (Timms & Moss, 1984).…”

Section: Introductionmentioning

confidence: 99%

Impact of submerged macrophytes on fish‐zooplanl phytoplankton interactions: large‐scale enclosure experiments in a shallow eutrophic lake

Schriver¹,

Bøgestrand²,

Jeppesen³

et al. 1995

Freshwater Biology

398

274

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SUMMARY1. The impact of changes in subn\erged macrophyte abundance on fish-zooplanktonphytoplankton interactions was studied in eighteen large-scale (100 m-) enclosures in a shallow eutrophic lake. The submerged macrophytes comprised Potamotegon pectinatus L., P. pusillus L. and Callitriche hermaphroditica L. while the fish fry stock comprised threespined sticklebacks, Gasterosteus aculeatus L., and roach, Rutilus rutilus L. 2. In the absence of macrophytes zooplankton biomass was low and dominated by cyclopoid copepods regardless of fish density, while the phytoplankton biovolume was high (up to 38 mm' 1') and dominated by small pennate diatoms and chlorococcales. When the lake volume infested by submerged macrophytes (PVI) exceeded 15-20% and the fish density was below a catch per unit effort (CPUE) of 10 (approx. 2 fry m"^), planktonic cladoceran biomass was high and dominated by relatively large-sized specimens, while the phytoplankton biovolume was !ow and dominated by small fastgrowing flagellates. At higher fish densities, zooplankton biomass and average biomass of cladocerans decreased and a shift to cyclopoids occurred, while phytoplankton biovolume increased markedly and became dominated by cyanophytes and dinoflagellates. 3. Stepwise multiple linear regressions on log-trans formed data revealed that the biomass of Daphnia, Bosmina, Ceriodaphnia and Chydorus were all significantly positively related to PVI and negatively to the abundance of fish or PVI x fish. The average individual biomass of cladocerans was negatively related to fish, but unrelated to PVI. Calculated zooplankton grazing pressure on phytoplankton was positively related to PVI and negatively to PVI X fish. Accordingly the phytoplankton biovolume was negatively related to PVI and to PVI X zooplankton biomass. Cyanophytes and chryptophytes (% of biomass) were positively and Chlorococcales and diatoms negatively related to PVI, while cyanophytes and Chlorococcales were negatively related to PVI x zooplankton biomass. In contrast diatoms and cryptophytes were positively related to the zooplankton biomass or PVI x zooplankton. 4. The results suggest that fish predation has less impact on the zooplankton community in the more structured environment of macrophyte beds, particularly when the PVI exceeds 15-20%. They further suggest that the refuge capacity of macrophytes decreases markedly with increasing fish density (in our study above approximately 10 CPUE). Provided that the density of planktivorous fish is not high, even small improvements in submerged macrophyte abundance may have a substantial positive impact on the zooplankton, leading to a lower phytoplankton biovolume and higher water transparency. However, at high fish densities the refuge effect seems low and no major zooplankton mediated effects of enhanced growth of macrophytes are to be expected. 255 P. Schriver et alThis further emphasizes the usefulness of macrophyte refuges as a lake-restoration tool in shallow lakes, but also demonstrates the shortcomings of the method, if t...

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“…According to the observations referred to in the literature, success is associated with a total phosphorus concentration below 50 µg/L [25] or at least below 100-200 µg/L [26], while disappointing results are often associated with phosphorus concentration above this level of more than approximately 120 µg/L [27] with a diffi cult control of the standing stocks of planktivorous fi sh [28,29].…”

Section: Biomanipulationmentioning

confidence: 99%

Structurally dynamic models of lakes

Jørgensen

2012

Int. J. DNE

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Lakes as all other ecosystems are adaptive, have self-organization, and change the species compositions in accordance with the variable forcing functions. Therefore, models that can capture this dynamics are needed, which means that the properties (represented in models by the parameter) of the biological components of the model are continuously changed. This paper presents what is denoted as structural dynamic models (SDMs) that can capture this dynamics of changing the ecosystem structure. A SDM uses a goal function to determine the changes of the parameters. Eco-exergy is used as goal function, which is the work capacity (work energy) of the ecosystem. The use of this goal function can be considered a translation of Darwin's theory to thermodynamics. In 23 case studies, it has been possible to use SDM to describe the structural changes with an acceptable standard deviation. Of these cases, 12 were lake models and an attempt is made in this paper to summarize the experience gained by the use of SDMs on lakes. The three most characteristic case studies are presented in more detail and conclusions on the applicability of SDM on lakes are summarized.

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Fish manipulation as a lake restoration tool in shallow, eutrophic temperate lakes 1: cross-analysis of three Danish case-studies

Cited by 105 publications

References 39 publications

Nature and nurture in dormancy: dissolved oxygen, pH, and maternal investment impact Bythotrephes longimanus resting egg emergence and neonate condition

Nature and nurture in dormancy: dissolved oxygen, pH, and maternal investment impact Bythotrephes longimanus resting egg emergence and neonate condition

Impact of submerged macrophytes on fish‐zooplanl phytoplankton interactions: large‐scale enclosure experiments in a shallow eutrophic lake

Structurally dynamic models of lakes

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