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  • Journals
  • Articles  (42)
  • Open Access-Papers  (42)
  • WILEY-BLACKWELL PUBLISHING  (18)
  • Russian Federal Research Institute of Fisheries and Oceanography (VNIRO)  (13)
  • Elsevier BV  (11)
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  • Journals
  • Articles  (42)
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  • Open Access-Papers  (42)
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  • 1
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    Compositional and functional consequences of environmental change in Belgian farmland ponds (2018)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Freshwater Biology, WILEY-BLACKWELL PUBLISHING, 63(6), pp. 581-596, ISSN: 0046-5070
    Details
    Publication Date: 2018-11-09
    Description: 1. A resampling of 38 small farmland ponds in Belgium after 10 years revealed a high temporal species turnover for both phytoplankton and zooplankton communities, associated with substantial changes in abiotic factors, especially a reduction in total phosphorus concentration. 2. Across ponds, phytoplankton biomass decreased while evenness and richness increased between the samplings in 2003 and 2013. By contrast, the zooplankton assemblage was characterised by lower biomass, richness and evenness in 2013. Ponds experiencing larger environmental change showed stronger changes in phytoplankton richness and evenness. 3. Resource use efficiency (RUE) of zooplankton increased with greater environmental change and zooplankton evenness, which points to a switch towards species with higher RUE or greater variety in food sources in higher trophic levels. 4. As ponds are important habitats for freshwater biodiversity and ecosystems services, the strong but predictable species turnover and the opposing effects of environmental change on different trophic levels need to be embedded in conservation and management plans.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 2
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    Spatiotemporal mortality and demographic trends in a small cetacean: Strandings to inform conservation management (2020)
    Elsevier BV
    In:  Biological Conservation vol. 249 no. 108733
    Details
    Publication Date: 2024-03-28
    Description: With global increases in anthropogenic pressures on wildlife populations comes a responsibility to manage them effectively. The assessment of marine ecosystem health is challenging and often relies on monitoring indicator species, such as cetaceans. Most cetaceans are however highly mobile and spend the majority of their time hidden from direct view, resulting in uncertainty on even the most basic population metrics. Here, we discuss the value of long-term and internationally combined stranding records as a valuable source of information on the demographic and mortality trends of the harbour porpoise (Phocoena phocoena) in the North Sea. We analysed stranding records (n = 16,181) from 1990 to 2017 and demonstrate a strong heterogeneous seasonal pattern of strandings throughout the North Sea, indicative of season-specific distribution or habitat use, and season-specific mortality. The annual incidence of strandings has increased since 1990, with a notable steeper rise particularly in the southern North Sea since 2005. A high density of neonatal strandings occurred specifically in the eastern North Sea, indicative of areas important for calving, and large numbers of juvenile males stranded in the southern parts, indicative of a population sink or reflecting higher male dispersion. These findings highlight the power of stranding records to detect potentially vulnerable population groups in time and space. This knowledge is vital for managers and can guide, for example, conservation measures such as the establishment of time-areaspecific limits to potentially harmful human activities, aiming to reduce the number and intensity of humanwildlife conflicts.
    Keywords: Surveillance programme ; Wildlife monitoring ; Marine mammal ; Mortality ; North Sea ; Harbour porpoise ; Phocoena phocoena
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
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    Phylogenetic placement of environmental sequences using taxonomically reliable databases helps to rigorously assess dinophyte biodiversity in Bavarian lakes (Germany). (2019)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Freshwater Biology, WILEY-BLACKWELL PUBLISHING, pp. 1-16, ISSN: 0046-5070
    Details
    Publication Date: 2019-12-19
    Description: 1. Reliable determination of organisms is a prerequisite to explore their spatial and temporal occurrence and to study their evolution, ecology, and dispersal. In Europe, Bavaria (Germany) provides an excellent study system for research on the origin and diversification of freshwater organisms including dinophytes, due to the presence of extensive lake districts and ice age river valleys. Bavarian freshwater environments are ecologically diverse and range from deep nutrient‐poor mountain lakes to shallow nutrient‐rich lakes and ponds. 2. We obtained amplicon sequence data (V4 region of small subunit‐rRNA, c. 410 bp long) from environmental samples collected at 11 sites in Upper Bavaria. We found 186 operational taxonomic units (OTUs) associated with Dinophyceae that were further classified by means of a phylogenetic placement approach. 3. The maximum likelihood tree inferred from a well‐curated reference alignment comprised a systematically representative set of 251 dinophytes, covering the currently known molecular diversity and OTUs linked to type material if possible. Environmental OTUs were scattered across the reference tree, but accumulated mostly in freshwater lineages, with 79% of OTUs placed in either Apocalathium, Ceratium, or Peridinium, the most frequently encountered taxa in Bavaria based on morphology. 4. Twenty‐one Bavarian OTUs showed identical sequences to already known and vouchered accessions, two of which are linked to type material, namely Palatinus apiculatus and Theleodinium calcisporum. Particularly within Peridiniaceae, delimitation of Peridinium species was based on the intraspecific sequence variation. 5. Our approach indicates that high‐throughput sequencing of environmental samples is effective for reliable determination of dinophyte species in Bavarian lakes. We further discuss the importance of well‐curated reference databases that remain to be developed in the future.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 4
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    Decomposing multiple dimensions of stability in global change experiments (2017)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Ecology Letters, WILEY-BLACKWELL PUBLISHING, ISSN: 1461-023X
    Details
    Publication Date: 2017-11-14
    Description: Ecological stability is the central framework to understand an ecosystem’s ability to absorb or recover from environmental change. Recent modelling and conceptual work suggests that stability is a multidimensional construct comprising different response aspects. Using two freshwater mesocosm experiments as case studies, we show how the response to single perturbations can be decomposed in different stability aspects (resistance, resilience, recovery, temporal stability) for both ecosystem functions and community composition. We find that extended community recovery is tightly connected to a nearly complete recovery of the function (biomass production), whereas systems with incomplete recovery of the species composition ranged widely in their biomass compared to controls. Moreover, recovery was most complete when either resistance or resilience was high, the latter associated with low temporal stability around the recovery trend. In summary, no single aspect of stability was sufficient to reflect the overall stability of the system.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 5
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    Updating approaches to the stock assessment and calculation of recommended catch of brine shrimp and brine shrimp at the cyst stage (species of the genus Artemia) (2022)
    Russian Federal Research Institute of Fisheries and Oceanography (VNIRO) | Moscow (Russia)
    Details
    Publication Date: 2022-12-21
    Description: The proposed recommendations are seen as a logical development of research aimed at assessing the state of the resource base and catch forecasting for brine shrimp and brine shrimp at the stage of cysts for different timing. Their special feature is the use of a unified methodical approach which takes into account the qualitative composition of populations and the background conditions of their habitat.
    Description: Предложенные рекомендации являются логическим развитием исследований, направленных на оценку состояния сырьевой базы и формирование прогнозов вылова артемии и артемии (на стадии цист) различной заблаговременности. Их особенность в использовании единого методического подхода для учёта качественного состава популяций и фоновых условий среды их обитания.
    Description: Published
    Description: Non Refereed
    Keywords: Brine shrimp ; Stock assessment ; Artemia ; Food resources ; Methodology ; Recommended catches ; Рекомендованный вылов ; Цисты ; Артемия ; Оценка запасов ; ASFA_2015::B::Brine shrimp eggs ; ASFA_2015::C::Cysts ; ASFA_2015::F::Forecasting
    Repository Name: AquaDocs
    Type: Conference Material
    Format: 3pp.
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  • 6
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    Critical seasonal conditions in the reindeer-herding year: A synopsis of factors and events in Fennoscandia and northwestern Russia (2023)
    Elsevier BV
    In:  EPIC3Polar Science, Elsevier BV, 39, pp. 101016-101016, ISSN: 1873-9652
    Details
    Publication Date: 2024-03-14
    Description: In this article, we identify what herders in Fennoscandia and northwestern Russia see as critical conditions and events in the annual reindeer herding cycle. Indigenous Sámi and Yamal reindeer herders identify eight seasons, each of which has crucial importance in its own way. Differences in perception between Fennoscandian and northwestern Russian reindeer herders about good and bad seasonal conditions are based on the degree of climatic and geographic variation, herd control and the variety of simultaneous pressures on pastures. The scope and speed of ongoing climate change in the Arctic will profoundly modify these conditions, and consequently shape critical events and outcomes in reindeer herding. The resulting challenges need to be assessed in the context of social and economic dynamics. Reindeer herders throughout Fennoscandia and Russia are concerned about future prospects of their livelihood. To adapt to climate change and develop new strategies, reindeer herders must have access to pastures; they must retain their mobility and flexibility; and their participation in land-use decisions must be endorsed.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 7
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    A systematic study of zooplankton-based indices of marine ecological change and water quality: Application to the European marine strategy framework Directive (MSFD) (2022)
    Elsevier BV
    In:  EPIC3Ecological Indicators, Elsevier BV, 135, pp. 108587-108587, ISSN: 1470-160X
    Details
    Publication Date: 2023-06-21
    Description: Marine zooplankton are central components of holistic ecosystem assessments due to their intermediary role in the food chain, linking the base of the food chain with higher trophic levels. As a result, these organisms incorporate the inherent properties and changes occurring atall levels of the marine ecosystem, temporally integrating signatures of physical and chemical conditions. For this reason, zooplankton-based biometrics are widely accepted as useful tools for assessing and monitoring the ecological health and integrity of aquatic systems. The European Marine Strategy Framework Directive (EU-MSFD) requires the use of different types of bio-monitors, including zooplankton, to monitor progress towards achieving specific environmental and water quality targets in EU. However, there is currently no comprehensive synthesis of zooplankton indices development, use, and associated challenges. We addressed this issue with a two-step approach. First, we formulated the indicator-metrics-indices cycle (IMIC) to redefine the closely related but often ambiguously utilized terms - indicator, metric and index, highlighting the convergence between them and the iterative nature of their interaction. Secondly, we formulated frameworks for synthesizing, presenting and systematically applying zooplankton indices based on the IMIC framework. The main benefits of the IMIC are twofold: 1). to disambiguate the key elements: indicators, metrics, and indices, revealing their links to an operational ecological indicator system, and 2) to serve as an organizing tool for the coherent classification of indices according to the MSFD descriptors. Using the IMIC framework, we identified and described two broad categories of indices namely the core biodiversity indices already in use in the Baltic Sea and North Atlantic regions, including the ‘Zooplankton Mean Size and Total Stock (zooplankton MSTS)’ and 'Plankton Lifeforms index (PLI)', and stressor-response indices retrieved from the existing literature, elucidating their applicability to different MSFD descriptors. Finally, major challenges of developing new indices and applying existing ones in the context of the MSFD were critically addressed and some solutions were proposed.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
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  • 8
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    Infestation of oysters and mussels by mytilicolid copepods: differences between natural coastal habitats and two offshore cultivation sites in the German Bight (2012)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Journal of Applied Ichthyology, WILEY-BLACKWELL PUBLISHING, 28(5), pp. 756-765, ISSN: 0175-8659
    Details
    Publication Date: 2019-07-17
    Description: The aim of this study was to determine the macro-parasitic infestation level of oysters from the southern German Bight focussing on copepods of the genus Mytilicola. Crassostrea gigas, Ostrea edulis and Mytilus edulis were collected at five locations: three nearshore sites in the eastern Wadden Sea and two offshore cultivation sites in the German Bight. To reveal seasonal variations one sampling site was investigated in winter and summer. At the nearshore sites, Mytilicola orientalis was regularly detected in C. gigas. Prevalences ranged between 32.3% and 45.1%, intensity between 3.0 ± 0.6 and 8.2 ± 1.5. Infestation rates of C. gigas within the southern German Bight decreased from west to east: Apparently, M. orientalis has started its range extension along the German coast with gradual retardation eastwards but generally followed the invasion route of its main host, the Pacific oyster. Interestingly, we detected not only M. intestinalis but also M. orientalis as an intestinal parasite in M. edulis, which has sofar not previously been described as host within this region. We conclude that M. orientalis is flexible in its host choice. Furthermore, in the eastern Wadden Sea infestation rates of oysters and mussels by copepods are similar. These results deviate from the patterns observed for the northern Wadden Sea in terms of infestation level and host specificity. No macro-parasites were found in oysters and mussels from the offshore sites. This absence can be considered as potentially beneficial for aquaculture activities in the open ocean in terms of stamina and physiological performance.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 9
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    Assessment of the effect of absence of spawning on the fish-farming and biological characteristics of Siberian sturgeon Acipenser baerii (Brandt, 1869) offspring (2022)
    Russian Federal Research Institute of Fisheries and Oceanography (VNIRO) | Moscow (Russia)
    Details
    Publication Date: 2022-12-20
    Description: The article presents the results of studies on the effect of spawning season absence of female Siberian sturgeon of the Lena population on the fish-biological characteristics of the experimental group, as well as the grown-up juveniles in the conditions of industrial farms. The offspring of experimental females that underwent the resorption process, despite the lowest weight of embryos at hatching, maintained a high growth rate throughout the entire rearing period, comparable with juveniles of control groups.
    Description: Представлены результаты исследований о влиянии пропуска нерестового сезона у самок сибирского осетра ленской популяции на рыбоводно-биологические характеристики экспериментальной группы, а также подрощенной молоди в условиях индустриальных хозяйств. Потомство опытной самки, прошедшей процесс резорбции, несмотря на самую низкую массу эмбрионов при вылуплении, на всём протяжении выращивания сохраняло высокий темп роста, сравнимый с молодью контрольных групп.
    Description: Published
    Description: Non Refereed
    Keywords: Females ; SIberian sturgeon ; Resorption ; Градусо-дни ; Сумма тепла ; Embryos ; Hatching ; Aquaculture experiments ; Резорбция ; Молодь ; Индустриальные хозяйства ; ASFA_2015::S::Spawning seasons ; ASFA_2015::J::Juveniles ; ASFA_2015::G::Growth rate
    Repository Name: AquaDocs
    Type: Conference Material
    Format: 3pp.
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  • 10
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    Role of deposit-feeding sea cucumbers in integrated multitrophic aquaculture: progress, problems, potential and future challenges (2016)
    WILEY-BLACKWELL PUBLISHING
    In:  EPIC3Reviews in Aquaculture, WILEY-BLACKWELL PUBLISHING, ISSN: 1753-5131
    Details
    Publication Date: 2019-07-17
    Description: There is significant commercial and research interest in the application of sea cucumbers as nutrient recyclers and processors of particulate waste in polyculture or integrated multitrophic aquaculture (IMTA) systems. The following article reviews examples of existing IMTA systems operating with sea cucumbers, and details the role and effect of several sea cucumber species in experimental and pilot IMTA systems worldwide. Historical observations and quantification of impacts of sea cucumber deposit-feeding and locomotion are examined, as is the development and testing of concepts for the application of sea cucumbers in sediment remediation and site recovery. The extension of applied IMTA systems is reported, from basic piloting through to economically viable farming systems operating at commercial scales. The near-global recognition of the ecological and economic value of deposit-feeding sea cucumbers in IMTA applications within existing and developing aquaculture industries is discussed. Predictions and recommendations are offered for optimal development of sea cucumber IMTA globally. Future directions within the industry are indicated, and key areas of ecological, biological and commercial concern are highlighted to be kept in mind and addressed in a precautionary manner as the industry develops.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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