Long-term trends in abundance of cladocerans in the Central Baltic Sea

Möllmann, Christian; Köster, Fritz; Kornilovs, Georgs; Sidrevics, L.

doi:10.1007/s00227-002-0822-9

Cited by 20 publications

(2 citation statements)

References 21 publications

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“…The knowledge of the distribution of marine cladocerans is incomplete, particularly in the Mediterranean Sea. Our haplotypes from the GoN are similar to those of the Baltic Sea and the North Sea, supporting E. nordmanni as an ideal candidate for transport in ballast water and in ballast tank sediments by transoceanic ships (Cristescu & Hebert, 2002; Durbin et al, 2008) thanks to their biological and ecological traits, including euryhalinity and temperature tolerance (Rivier, 1998), as well as long survival as resting eggs (Egloff et al, 1997; MacIsaac et al, 1999; Möllmann et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Is integrated taxonomy useful to study diversity and ecology? An example from crustacean zooplankton at the Long‐Term ecological research site MareChiara (LTER‐MC)

et al. 2023

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Molecular tools increasingly refine and improve the identification of zooplankton organisms based on phenotypic features, providing a more robust and comprehensive species description. Integration of data helps revealing the hidden diversity of zooplankton and facilitating the detection of rare and non‐indigenous species. This approach, merging morphological characters and a diagnostic marker for specific identification, such as the mitochondrial cytochrome c oxidase I (COI), is here used to characterize key taxa from the zooplankton assemblage of the Gulf of Naples at the Long‐Term Ecological Research site MareChiara (LTER‐MC) (Central Tyrrhenian Sea, Western Mediterranean Sea). Zooplankton biodiversity assessment using integrated taxonomy was focused on selected crustacean groups: cyclopod copepods (Agetus typicus, Oithona plumifera, Oncaea mediterranea, Oncaea scottodicarloi); newly records of cladocerans (Evadne nordmanni), euphausiids (Euphausia krohnii, Nematoscelis megalops, Nyctiphanes spp.) and sergestids (Lucifer typus), with the aim to boost the knowledge of real zooplankton biodiversity. The results of our investigation provide new high‐quality molecular references of the analysed taxa and contribute to unveiling the genetic diversification of zooplankton species and their relevant ecological significance for Mediterranean coastal waters.

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Section: Discussionmentioning

confidence: 99%

Is integrated taxonomy useful to study diversity and ecology? An example from crustacean zooplankton at the Long‐Term ecological research site MareChiara (LTER‐MC)

et al. 2023

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“…Humans are altering environmental conditions at an unprecedented rate and scale. This is in turn altering species communities, but the mechanisms behind the effects, and how the changes progress over time, are poorly known (Walther 2010;Bellard et al 2012;Moritz and Agudo 2013;Dirzo et al 2014;Scheffers et al 2016). This is hampering our understanding of the long-term consequences of anthropogenic disturbances for ecosystem structure and function.…”

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confidence: 99%

Long‐term changes in a zooplankton community revealed by the sediment archive

Vehmaa

Katajisto

Candolin

2018

Limnology & Oceanography

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To reconstruct changes in zooplankton communities in response to past anthropogenic perturbations, one possibility is to use the sedimentary records. We analyzed the sediments at a coastal site in the Northern Baltic Sea to relate changes in the zooplankton community to anthropogenic eutrophication and the invasion of a predatory cladoceran, Cercopagis pengoi. We sampled 30‐cm laminated sediment cores and dated the sediment layers back to the 1950s. From each 1‐cm layer, we measured eutrophication indicators (δ13C, δ15N, TC, TN, TP) and identified and counted zooplankton resting eggs (cladoceran, calanoid copepod, rotifer). In addition, we estimated the abundance of the cladoceran Bosmina (Eubosmina) maritima by counting subfossils (carapaces, headshields, and ephippia) and estimated the experienced stress as the relationship between sexual and asexual reproduction. Using redundancy and variance partitioning analyses, we found ∼ 16% of the variation in the zooplankton community to be explained by eutrophication, and 24% of the variation in B. (E.) maritima abundance and reproduction mode to be explained by eutrophication and the introduction of the alien predator. Our results show a long‐term shift from calanoid copepods and predatory cladocerans toward small‐sized zooplankton species, like rotifers. Furthermore, the results indicate that the invasion of C. pengoi induced a short‐term increase in sexual reproduction in B. (E.) maritima. The results indicate that anthropogenic eutrophication since the 1950s has altered the zooplankton community toward smaller species, while the invasion of the predatory cladoceran had only a transitory influence on the community during its expansion phase.

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Population genetics of two allopatric (North Sea and Baltic Sea) populations of Evadne nordmanni (Podonidae): Similarities and differences

Böckmann

Seidler

Schubert

et al. 2018

Internat Rev Hydrobiol

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This study assessed the genetic relationship between Evadne nordmanni of the Baltic Sea and the North Sea from sequence variation of the mitochondrial cytochrome c oxidase subunit I gene (COI) of 88 specimens from 13 different sites, and from further published data from the Atlantic and Pacific basins. The COI sequences of E. nordmanni from the North and Baltic Seas were represented by a coherent cluster of 28 haplotypes dominated by a central haplotype that accounted for over half of the individuals from these seas, from all samples except one from the Arkona Basin (Baltic Sea). Overall, the North and Baltic Sea populations appear relatively homogenous and the North Sea plausibly represents the source population for the Baltic one. However, the haplotype network also involved a haplogroup of exclusively Baltic Sea haplotypes, comprising four haplotypes represented by 21 individuals and strongly dominated by specimens from the Arkona basin. This inspires discussion about the post‐glacial evolution of a genetically distinct Baltic Sea group, related to a special local salinity regime. Partly as a reflection of the presence of the unique haplogroup, the mean haplotype diversity in the Baltic was twice as high as the mean diversity in the North Sea, h = 0.64 versus h = 0.30.

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Long-term trends in abundance of cladocerans in the Central Baltic Sea

Cited by 20 publications

References 21 publications

Is integrated taxonomy useful to study diversity and ecology? An example from crustacean zooplankton at the Long‐Term ecological research site MareChiara (LTER‐MC)

Is integrated taxonomy useful to study diversity and ecology? An example from crustacean zooplankton at the Long‐Term ecological research site MareChiara (LTER‐MC)

Long‐term changes in a zooplankton community revealed by the sediment archive

Population genetics of two allopatric (North Sea and Baltic Sea) populations of Evadne nordmanni (Podonidae): Similarities and differences

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