Comparing fixed-point and probabilistic sampling designs for monitoring the marine ecosystem near McMurdo Station, Ross Sea, Antarctica

Simple item page
dc.contributor.authorMorehead, Sally
dc.contributor.authorMontagna, Paul A.
dc.contributor.authorKennicutt II, Mahlon C.
dc.date.accessioned2023-05-25T19:47:14Z
dc.date.available2023-05-25T19:47:14Z
dc.date.issued2008-05-16
dc.description.abstractFixed-point and probabilistic sampling designs were compared to investigate which design best detected known contamination gradients in the marine ecosystem adjacent to McMurdo Station, Antarctica. The fixed-point sampling design included transects along historical contamination and physical disturbance gradients. The probabilistic sampling design used randomly selected hexagons spaced at 50 m intervals. In both designs, 15 stations were sampled over a small area (~1 km2) that extended from Winter Quarters Bay to Cape Armitage. Sediment quality triad components (sediment chemical contaminants, sediment toxicity, and a benthic index of biotic integrity) were measured to indicate chemical, toxicological, and biological effects. There were higher correlations between sediment quality triad components for the fixed-point sampling design than for the probabilistic design. The fixed-point design was better at detecting the intensity of alteration because disturbance of the marine ecosystem at McMurdo Station is localized within a small area. Based on these results, a limited fixed-point design with nine stations detected no significant change in macrofaunal community structure over a four year period from 2000–2004. However, the macrofaunal assemblages present in the contaminated portions of Winter Quarters Bay are indicative of a disturbed benthic community that has been subject to organic enrichment and toxic chemical exposure.en_US
dc.identifier.citationMorehead, S., Montagna, P.A., and M.C. Kennicutt II. 2008. Comparing fixed-point and probabilistic sampling designs for monitoring the marine ecosystem near McMurdo Station, Antarctica. Antarctic Science 20: 471-484. doi: 10.1017/S0954102008001326en_US
dc.identifier.urihttps://hdl.handle.net/1969.6/96292
dc.language.isoen_USen_US
dc.publisherAntarctic Scienceen_US
dc.titleComparing fixed-point and probabilistic sampling designs for monitoring the marine ecosystem near McMurdo Station, Ross Sea, Antarcticaen_US
dc.typeArticleen_US

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
comparing-fixed-point-and-probabilistic-sampling-designs-for-monitoring-the-marine-ecosystem-near-mcmurdo-station-ross-sea-antarctica.pdf
Size:
377.5 KB
Format:
Adobe Portable Document Format
Description:
Download

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.72 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Publications