Benthic Foraminiferal Ecology and Environmental Monitoring

Benthic foraminifera are single-celled protists that inhabit the seafloor from intertidal zones to the deep ocean, producing mineralised shells or tests that preserve a rich archive of environmental information. Their communities respond rapidly to changes in sediment chemistry, organic matter supply, heavy-metal contamination and oxygen availability, making them powerful bioindicators for both contemporary monitoring and palaeoenvironmental reconstruction. Advances in morphological analysis, geochemical proxies and molecular barcoding have enhanced our ability to resolve species-level responses to stressors, while the spatial and temporal resolution afforded by high-throughput sequencing and environmental DNA surveys is extending monitoring into under-sampled and remote environments. Integrating quantitative indices, such as diversity metrics and foraminiferal deformation frequencies, with sediment geochemistry and retrospective baselines, supports robust assessment of anthropogenic impacts, informs management of coastal and estuarine ecosystems and contributes to global efforts in climate and biodiversity conservation.

Research from Nature Portfolio

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Benthic Foraminiferal Ecology and Environmental Monitoring publication trend

The graph below shows the total number of articles in benthic foraminiferal ecology and environmental monitoring across all publications each year (not limited to Nature Index journals).

Technical terms

Benthic foraminifera: Single-celled marine protists that live on or within sediments and build mineralised shells, widely used as indicators of environmental conditions.

Test: The hard, often calcareous shell of a foraminifer, whose morphology and chemical composition record ecological and geochemical information.

Bioindicator: A species or community whose presence, abundance or health reflects the state of environmental parameters such as pollution or oxygen levels.

Ribosomal reference dataset: A curated library of ribosomal DNA sequences used as a standard for molecular identification and taxonomic assignment in biodiversity studies.

Pollution Load Index (PLI): A numerical tool that integrates concentrations of multiple contaminants in sediment to quantify overall pollution status relative to background levels.

Retrospective biomonitoring: The reconstruction of past environmental conditions using preserved biological assemblages as a temporal baseline for assessing change.

References

1. BFR2: a curated ribosomal reference dataset for benthic foraminifera. Scientific Data (2024).
2. Benthic foraminifera as bioindicators for the heavy metals in the severely polluted Hurghada Bay, Red Sea coast, Egypt. Environmental Science and Pollution Research (2023).
3. Defining ecological reference conditions in naturally stressed environments – How difficult is it?. Marine Environmental Research (2020).