Data · collection
Biomagnification of mercury in an Antarctic marine coastal food web during 1989-1991
Listed in NASA Earthdata CMR
Twenty samples of surface sediment (the top 3.0 cm) were taken on soft bottoms (from 20 to 300 m depth) with a stainless steel box corer.
Description
Phytoplankon and zooplankton were sampled with conical nylon nets (1m in diameter, 50 and 500 mm mesh size, respectively), towed just below the surface. Krill samples were collected in the Ross Sea with a plankton sampler (EZNET BIONESS) equipped with 10 nets of 250 and 500 mm mesh size at a depth raging from 10 to 100 m.
Benthic organisms were obtain with a Van Veen grab or by dredging on hard bottoms. Fish specimens were caught with a trammel net or baited long lines. On the coast around Terra Nova Bay, eggs, primary feathers, chick plumage and guano samples were gathered when possible in abandoned nests of sea birds (both plankton and fish eating).
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Samples of stomach contents were taken from 5 Adelie penguins (Pigoshelis adeliae). Various internal organs and tissues were obtained from an Adelie penguins and an adult female Weddell Seal (Leptonychotes weddellii). Samples were frozen for storage and transport to Italy.
In the laboratory, both sediments and biological material was decomposed with HNO3 (Merck Suprapur) in Teflon vessels under pressure at 120 degrees C for 8 hrs. Mercury was determined in the digested solution by Flow Injection Atomic Absorption Spectrometry (FIAAS) using a Perkin Elmer FIMS 400.
Links
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214620868-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214620868-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Birds · DREDGING DEVICES · FIELD INVESTIGATION · Food-Web Dynamics · GRAB SAMPLERS · Mammals · Mercury · Phytoplankton · PLANKTON NETS · Sediment Composition · SEDIMENT CORERS · SOIL SAMPLER · Species Bioaccumulation · SPECTROMETERS · Zooplankton
- Inferred from text
- Oceanography 74%
Provenance · 1 source records, 23 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214620868-SCIOPS | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3708 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (74%) |
| concepts[instrument].gcmd_instrument:dredging-devices | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:grab-samplers | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:plankton-nets | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:sediment-corers | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:soil-sampler | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:spectrometers | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates/birds | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates/mammals | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecological-dynamics/ecosystem-functions/food-web-dynamics | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecological-dynamics/ecotoxicology/species-bioaccumulation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecosystems/aquatic-ecosystems/plankton/phytoplankton | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/ecosystems/aquatic-ecosystems/plankton/zooplankton | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/land-surface/soils/heavy-metals/mercury | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/marine-sediments/sediment-composition | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:field-investigation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |