The occurrence of the invasive foraminifera Trochammina hadai Uchio in Flamengo Inlet, Ubatuba, Sao Paulo State, Brazil

Eichler, Patrícia Pinheiro Beck; McGann, Mary; Rodrigues, Alex de Freitas; Mendonça, Alison; Amorim, Audrey; Bonetti, Carla; Farias, Cristiane Cordeito de; Sousa, Silvia Helena de Mello e; Vital, Helenice; Gomes, Moab Praxedes

doi:10.47894/mpal.64.6.05

Cited by 16 publications

(5 citation statements)

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“…Notably these species have their first occurrence datums in the same relative order in the core as their known time of introduction (Figure SFB2), and they can be used to develop a high-resolution biostratigraphy of the proposed Crawfordian stage across San Francisco Estuary. Trochammina hadai is an intercontinental marker for deposits of the proposed Crawfordian stage in shallow marine and estuarine deposits (e.g., Eichler et al, 2016;Tremblin et al, 2022;Bouchet et al, 2023). Plotting key biostratigraphical events here suggests that the time series analysis gives an approximation of age, but for some intervals may be a few years in error.…”

Section: 5mentioning

confidence: 83%

Part 2: Descriptions of the proposed Crawford Lake GSSP and supporting SABSs. The Anthropocene Epoch and Crawfordian Age: proposals by the Anthropocene Working Group

Waters,

Turner,

et al. 2024

Preprint

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This part of the Anthropocene Working Group (AWG) submission proposes that the base of the Anthropocene should be defined as series/epoch, terminating the Holocene Series/Epoch with a single Crawfordian stage/age using a Global boundary Stratotype Section and Point (GSSP) in an annually varved Crawford Lake core, Ontario, Canada, defined at 17.5 cm in core CRA23-BC-1F-B at the base of the dark lamina in a varve deposited in 1952 CE, at the level where the primary marker shows a rapid increase in 239+240Pu concentrations (coinciding with a globally recognisable, isochronous signal of the first above-ground thermonuclear tests). Secondary markers, determined in precisely correlated core closely adjacent to the proposed GSSP host, include a marked increase in 14C values and in spheroidal carbonaceous particles (SCPs), increased heavy metal concentrations, a decline in δ15N values, a marked change in phytoplankton assemblages and declines in elm (Ulmus) pollen and in non-arboreal pollen. The submission also provides descriptions of three proposed Standard Auxiliary Boundary Stratotypes (SABSs), in cores extracted from marine anoxic sediments of Beppu Bay (Japan), in Sihailongwan Maar Lake (China) and in the Śnieżka Peatland (Poland) and eight reference sections located in cores extracted from marine anoxic sediments in the Baltic Sea, from coral bioherms off Australia and in the Gulf of Mexico, from an Antarctic ice core, from San Francisco Estuary and nearby lake (USA), in a speleothem from northern Italy and a section in urban anthropogenic deposits in Austria. This ubiquity of signals verifies that the Anthropocene can be widely delineated as a sharply distinctive chronostratigraphic unit in diverse terrestrial and marine depositional environments, and reflects a major Earth System change that will have geologically lasting consequences.

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Section: 5mentioning

confidence: 83%

Part 2: Descriptions of the proposed Crawford Lake GSSP and supporting SABSs. The Anthropocene Epoch and Crawfordian Age: proposals by the Anthropocene Working Group

Waters,

Turner,

et al. 2024

Preprint

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“…In GF (i.e., normal marine conditions) our taxa included typical marine species, such as Stainforthia fusiformis , Bulimina marginata , and Cibicidoides lobatulus . These were absent in KF and partly in HF, where typical brackish (below euhaline, i.e., < 30; Anon., 1959) taxa, such as Trochammina hadai (Eichler et al, 2018; McGann, 2014), Vellaria pellucida and Cedhagenia sp. (Gooday et al, 2011), were common.…”

Section: Discussionmentioning

confidence: 99%

Through the eDNA looking glass: Responses of fjord benthic foraminiferal communities to contrasting environmental conditions

Brinkmann

Schweizer

Quinchard

et al. 2023

J Eukaryotic Microbiology

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The health of coastal marine environments is severely declining with global changes. Proxies, such as those based on microeukaryote communities, can record biodiversity and ecosystem responses. However, conventional studies rely on microscopic observations of limited taxonomic range and size fraction, missing putatively ecologically informative community components. Here, we tested molecular tools to survey foraminiferal biodiversity in a fjord system (Sweden) on spatial and temporal scales: Alpha and beta diversity responses to natural and anthropogenic environmental trends were assessed and variability of foraminiferal environmental DNA (eDNA) compared to morphology‐based data. The identification of eDNA‐obtained taxonomic units was aided by single‐cell barcoding. Our study revealed wide diversity, including typical morphospecies recognized in the fjords, and so‐far unrecognized taxa. DNA extraction method impacted community composition outputs significantly. DNA extractions of 10 g sediment more reliably represented present diversity than of 0.5‐g samples and, thus, are preferred for environmental assessments in this region. Alpha‐ and beta diversity of 10‐g extracts correlated with bottom‐water salinity similar to morpho‐assemblage diversity changes. Sub‐annual environmental variability resolved only partially, indicating damped sensitivity of foraminiferal communities on short timescales using established metabarcoding techniques. Systematically addressing the current limitations of morphology‐based and metabarcoding studies may strongly improve future biodiversity and environmental assessments.

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“…It may have implications for native species interactions and ecosystem processes since these agglutinated foraminifera Trochammina hadai´s have first appearance in the Brazilian coastal waters of Flamengo Inlet, Ubatuba, São Paulo State in 2010. 9 By 2014 and 2015, the species was found alive at this place in 78% of the samples, with relative abundance reaching 18%. Eichler et al 9 (op.…”

Section: Biological Datamentioning

confidence: 96%

“…9 By 2014 and 2015, the species was found alive at this place in 78% of the samples, with relative abundance reaching 18%. Eichler et al 9 (op. cit) have suggested this recent colonization was most likely the result of an introduction by anchor mud on commercial fishing boats and recreational vessels or from fishing bait, and the species proliferation due to its suitability to live in anthropogenically-induced stressed environmental conditions of the inlet that has affected the ecological dominance of this benthic community.…”

Section: Biological Datamentioning

confidence: 96%

Evaluation of seasonal anoxia in Florianópolis North Bay through environmental indicators

Eichler

2024

JAMB

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Foraminifera, as single-celled organisms encased in shell-like structures known as tests, play pivotal roles within marine ecosystems. Their ubiquitous presence and fossilized remains provide invaluable insights into past environmental conditions. However, contemporary challenges posed by human activities imperil foraminiferal populations, notably through pollution-induced hypoxia, a condition characterized by oxygen depletion in aquatic environments. This study focuses on utilizing foraminifera as bioindicators to assess hypoxia within Florianópolis's North Bay, situated in Brazil. Sediment samples collected in May and October 2014 served as the basis for this investigation. By analyzing both abiotic and biological data, the study uncovered concerning trends, including low oxygen levels and elevated organic matter content in the bay's sediments. These environmental conditions create favorable habitats for opportunistic species such as Ammonia tepida, known for their resilience to fluctuating environmental parameters. Additionally, the presence of an invasive species, Trochammina hadai, further complicates the ecological dynamics of the bay. This invasive species, originally from San Francisco Bay and Japan, underscores the interconnectedness of marine ecosystems and the potential consequences of biological invasions. The findings from this study shed light on the ecological imbalance within Florianópolis's North Bay, highlighting the urgent need for comprehensive management strategies. Addressing the root causes of pollution and hypoxia is paramount to safeguarding the bay's biodiversity and ecological health. Implementing effective conservation measures will be essential to ensure the long-term vitality of this marine ecosystem for future generations.

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The occurrence of the invasive foraminifera Trochammina hadai Uchio in Flamengo Inlet, Ubatuba, Sao Paulo State, Brazil

Cited by 16 publications

References 0 publications

Part 2: Descriptions of the proposed Crawford Lake GSSP and supporting SABSs. The Anthropocene Epoch and Crawfordian Age: proposals by the Anthropocene Working Group

Part 2: Descriptions of the proposed Crawford Lake GSSP and supporting SABSs. The Anthropocene Epoch and Crawfordian Age: proposals by the Anthropocene Working Group

Through the eDNA looking glass: Responses of fjord benthic foraminiferal communities to contrasting environmental conditions

Evaluation of seasonal anoxia in Florianópolis North Bay through environmental indicators

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