[Personnel: Last_Name='SELKIRK', First_Name='PATRICIA']
Measurement of moss growth rates in AntarcticaEntry ID: ASAC_1104
Abstract: Metadata record for data from ASAC Project 1104
See the link below for public details on this project.
---- Public Summary from Project----
Mosses are dominant plants in the vegetation of continental Antarctica. This projects measurements of moss growth rates in several habitats will allow estimates of the ages of stands of moss, predictions of the rate of recovery from ... disturbance, and predictions of moss growth rates under changed climatic conditions.
from the abstract of the referenced paper:
Using steel pins inserted into growing moss colonies near Casey Station, Wilkes Land, continental Antarctica, we have measured the growth rate of three moss species: Bryum pseudotriquetrum and Schistidium antarctici over 20 years and Ceratodon purpureus over 10 years. This has provided the first long term growth measurements for plants in Antarctica, confirming that moss shoots grow extremely slowly in Antarctica, elongating between 1 and 5 mm per year. Moss growth rates are dependent on availability of water. Antheridia were observed on some stems of B. pseudotriquetrum; no archegonia or sporophytes were observed. Stems bearing antheridia elongated much more slowly than vegetative stems in the same habitat. Two other methods of growth rate measurement were tested, and gave similar rates of elongation over shorter periods of time. However, for long-term measurements, the steel pin measurements proved remarkably reproducible and reliable.
(Click for Interactive Map)
Start Date: 1982-09-30Stop Date: 2006-03-31
ISO Topic Category
Quality Values provided in temporal and spatial coverage are approximate only.
From the referenced paper:
Measurement sites were established in 1982, in an area of abundant moss growth near Casey Station on the shore of Vincennes Bay, Wilkes Land, Antarctica. The study sites are within the area that has since been designated ASPA 135 (SCAR 2004). The ... study area was roughly level, with higher ground to the south from which a small drainage line carried melt water. Beyond a low ridge to the east was a small lake with a rocky margin. The area was scattered with rocks, and three species of moss, Bryum pseudotriquetrum, Ceratodon purpureus, and Schistidium antarctici, formed continuous turfs amongst the rocks in parts of the study area. Plants growing on the higher ground to the south and east formed discontinuous cover, often polsters, in drier habitats than those along the drainage line or at the lake margin. The level of available moisture at a site influenced the occurrence of species at the site, and morphology of the mosses. Morphology of B. pseudotriquetrum and S. antarctici was strikingly different at wet and dry sites.
Method 1: measurements against cranked wires (or pins).
Method 2: measurements of stems cut from a turf, bagged or tied into bundles, replaced and remeasured.
Method 3: measurement of growth above a stain applied to stems.
Access Constraints An excel spreadsheet of locations of measurement pins, plus a pdf copy of the referenced paper are available for download from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference at the provided URL when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 1 kb
Distribution Format: csv
Distribution Media: HTTP
Distribution Size: 2.7 MB
Distribution Format: pdf
Role: TECHNICAL CONTACT
Phone: +61 2 9850 8144
Fax: +61 2 9850 8245
Email: pselkirk at rna.bio.mq.edu.au
Macquarie University Department of Biological Sciences
Province or State: New South Wales
Postal Code: 2109
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Selkirk, P.M., Skotnicki, M.L. (2007) Measurement of moss growth in continental Antarctica Polar Biology 30(4). 407-413
Creation and Review Dates
DIF Creation Date: 2000-08-09
Last DIF Revision Date: 2010-07-26