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<p>Meiofauna, the dominant metazoan component of benthic ecosystems, play a crucial role in nutrient cycling and energy transfer in marine sediments and are highly responsive to environmental change. This study investigated the composition, abundance, biomass, diversity, and spatio-temporal variability of meiofaunal communities in glacial soft-bottom habitats of Arctic Kongsfjorden during 2015–2017, together with their relationships to environmental conditions. Meiofaunal assemblages were consistently dominated by Foraminifera and Nematoda, which together accounted for the majority of total abundance throughout the study period. Community analyses revealed clear spatial heterogeneity among stations, while temporal variability between years was comparatively lower, indicating relative interannual stability of the benthic system. Disturbed community patterns, reflected in dominance structure and biomass relationships, suggest that glacier-influenced sediments experience persistent ecological stress. Multivariate analyses further showed that sediment characteristics and associated environmental variables were the principal drivers shaping meiofaunal distribution. These findings demonstrate that Arctic meiofaunal communities are strongly structured by local habitat conditions while remaining sensitive to glacial disturbance, highlighting their value as effective bioindicators for monitoring climate-driven and anthropogenic changes in polar coastal ecosystems.</p>

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Shifting ecological dynamics and biocoenosis of meiofauna in a changing Arctic fjord (Kongsfjorden, Svalbard)

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • P.P. Krishnapriya,
  • Anoop N. Nair,
  • N.K. Aswathy,
  • K.B. Kavya,
  • P.C. Shamily Catherine,
  • Suhaana M. Nazar,
  • S. Bijoy Nandan,
  • M. Harikrishnan,
  • A.V. Shibu

摘要

Meiofauna, the dominant metazoan component of benthic ecosystems, play a crucial role in nutrient cycling and energy transfer in marine sediments and are highly responsive to environmental change. This study investigated the composition, abundance, biomass, diversity, and spatio-temporal variability of meiofaunal communities in glacial soft-bottom habitats of Arctic Kongsfjorden during 2015–2017, together with their relationships to environmental conditions. Meiofaunal assemblages were consistently dominated by Foraminifera and Nematoda, which together accounted for the majority of total abundance throughout the study period. Community analyses revealed clear spatial heterogeneity among stations, while temporal variability between years was comparatively lower, indicating relative interannual stability of the benthic system. Disturbed community patterns, reflected in dominance structure and biomass relationships, suggest that glacier-influenced sediments experience persistent ecological stress. Multivariate analyses further showed that sediment characteristics and associated environmental variables were the principal drivers shaping meiofaunal distribution. These findings demonstrate that Arctic meiofaunal communities are strongly structured by local habitat conditions while remaining sensitive to glacial disturbance, highlighting their value as effective bioindicators for monitoring climate-driven and anthropogenic changes in polar coastal ecosystems.