Morphological examination of the resting egg structure of 3 cladoceran species [Ceriodaphnia quadrangula (O. F. Müller, 1785), Daphnia longispina (O. F. Müller, 1776), and D. magna Straus, 1820]

Kaya, Murat; Erdoğan, Sevil Savaş

doi:10.3906/zoo-1302-47

Cited by 12 publications

(3 citation statements)

References 11 publications

(21 reference statements)

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“…eDNA water samples were vacuum filtered on-site in the Limnotron facility immediately after collection using 1.2 μM glass fiber filters (GE Healthcare 1,822,047). To prevent Daphnia and their eggs (both >250 μM in width, Kaya & Erdoğan, 2014) from landing on filters during filtration, sterile 40 μM mesh was positioned on top of filter funnels using 10 cm plastic sieve rings (Halltech Aquatic Research Inc.). 1 L samples were either completely filtered with one filter, or in instances of high algal density that induced severe filter clogging, two GF filters (500 ml per filter).…”

Section: Sampling Proceduresmentioning

confidence: 99%

Environmental DNA tracks zooplankton population dynamics in experimental mesocosms

et al. 2022

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Environmental DNA (eDNA) holds notable potential for biomonitoring and ecological research. However, its utility for quantifying temporal changes in abundance, biomass, and diversity remains contentious. We investigated biotic and abiotic factors influencing temporal variation in eDNA concentration in large, 28,000 L experimental mesocosms. Time series data demonstrated a positive relationship between the population abundance and biomass of the Cladoceran zooplankton species Daphnia magna and eDNA concentration, with a time lag of ~3.5 days in 25°C conditions, and up to 28 days in 15°C. Water temperature variations within mesocosms did not consistently influence eDNA quantity, although water temperature negatively predicted DNA concentration across mesocosms. Algal density negatively correlated with D. magna eDNA quantity across and within mesocosms. We demonstrate that eDNA signal detection can be used as a proxy for relative abundance and suggest that future investigation into the dynamics of eDNA shedding and degradation processes is warranted.

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Section: Sampling Proceduresmentioning

confidence: 99%

Environmental DNA tracks zooplankton population dynamics in experimental mesocosms

et al. 2022

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“…Control Fish At the end of the experiment the number (mean ± SD pieces per 5 cm 3 ) of resting eggs was higher in the controls (2.40 ± 0.89) than in the fish treatments (0.75 ± 0.96) (one-way ANOVA, p = 0.032). The morphology of ephippia matched D. longispina [45,46].…”

Section: Zooplankton Groupsmentioning

confidence: 73%

Omnivorous Carp (Carassius gibelio) Increase Eutrophication in Part by Preventing Development of Large-Bodied Zooplankton and Submerged Macrophytes

Razlutskij

Mei

Maisak

et al. 2021

Water

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Fish, being an important consumer in aquatic ecosystems, plays a significant role by affecting the key processes of aquatic ecosystems. Omnivorous fish consume a variety of food both from pelagic and benthic habitats and may directly or indirectly affect the plankton community as well as the lake trophic state. We conducted a 72-day outdoor experiment in mesocosms with and without Prussian carp (Carassius auratus) to evaluate the effect of this often-stocked omnivorous fish on the plankton community and water quality. We found that the presence of fish increased the biomass of planktonic algae, total and inorganic suspended solids, leading to decreased light intensity in the water and a lower biomass of benthic algae. Fish also prevented development of submerged macrophytes and the establishment of large-bodied zooplankton. However, the fish did not increase nitrogen concentrations and even was lowered total phosphorus levels, in part due to nutrient storage in the fish. We conclude that stocking of Prussian carp should be avoided, or removed where stocked and abundant, to obtain good ecological quality of shallow lakes, characterized by clear water and high abundance of macrophytes.

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“…Although most are slightly smaller, at <500 μm long, Kuqaia shells have morphological similarities to the ephippia (encasings protecting the dormant embryos) of extant cladocerans (Crustacea: Branchiopoda: Cladocera/Diplostraca), at 400-2500 μm long ( [34,47,48]; Fig 9). Apart from their microscopic size, Kuqaia shares with cladoceran ephippia, a HF-resistant wall, roughly semicircular shell shape and elongate posterior appendages.…”

Section: The Biological Affinities Of Kuqaia and Their Paleoecologymentioning

confidence: 99%

New species of Kuqaia from the Lower Jurassic of Sweden indicates a possible water flea (Crustacea: Branchiopoda) affinity

Peng¹,

Slater²,

McLoughlin³

et al. 2023

PLoS ONE

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The enigmatic acid-resistant mesofossil genus Kuqaia is emended, a new species (Kuqaia scanicus) is instituted, and three established species are described from the Lower Jurassic (lower Pliensbachian) of the Kävlinge BH-928 core, in southern Sweden. Kuqaia has a distribution across the middle northern latitudes of Pangaea and is restricted to Lower to lower Middle Jurassic strata. Morphological characters support Kuqaia being the ephippia (resting egg/embryo cases) of Cladocera (Crustacea: Branchiopoda), and a probable early stem-group taxon of the Daphnia lineage. The paleoecology of the small planktonic crustaceans indicate purely fresh-water environments, such as lakes or ponds, all occurrences being in continental deposits, and the Kuqaia specimens possibly represent dry-season resting eggs. Chemical analyses of these and similar fossils, and of extant invertebrate eggs and egg cases are recommended to improve resolution of the biological affiliations of such mesofossil groups.

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Morphological examination of the resting egg structure of 3 cladoceran species [Ceriodaphnia quadrangula (O. F. Müller, 1785), Daphnia longispina (O. F. Müller, 1776), and D. magna Straus, 1820]

Cited by 12 publications

References 11 publications

Environmental DNA tracks zooplankton population dynamics in experimental mesocosms

Environmental DNA tracks zooplankton population dynamics in experimental mesocosms

Omnivorous Carp (Carassius gibelio) Increase Eutrophication in Part by Preventing Development of Large-Bodied Zooplankton and Submerged Macrophytes

New species of Kuqaia from the Lower Jurassic of Sweden indicates a possible water flea (Crustacea: Branchiopoda) affinity

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