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In 2010-11 70mm soil cores were collected from locations at Macquarie Island rich in the invasive plant Poa annua. The cores were collected at 22 sites, with 10 samples per site. Processing and identification of species was completed in 2016. This file contains three spreadsheets: site descriptions, complete sample descriptions and abundance of springtail species at the sites. The work was carried as part of Australian Antarctic Science (AAS) Project 4024 and is currently being written up into several papers. The 'Quad veg' column gives the percentage vegetation cover in the one metre square quadrat. The 'sample veg' column gives the percentage vegetation cover in the 70mm soil core. The numbers in these columns are percentages and the letters are abbreviations for vegetation types: pa = Poa annua, cal = Callitriche sp., ttg = tall tussock grassland (Poa foliosa), sg = short grassland (range of species), colo = Colobanthus spp. In the 'rabbit presence' column 1 means there was evidence of rabbit presence in the quadrat and 0 means otherwise.
Data from the Macquarie Island non-native plant survey was consolidated into 1km grid squares. Data are provided on the presence and abundance of Stellaria media, Cerastium fontanum, Poa annua on both the contemporary 1km grid, and the historical Tasmanian Parks and Wildlife Service grid.
In 2010-11 a whole island survey or Macquarie Island was undertaken by Justine Shaw and Aleks Terauds. Quadrats (1m * 1m and 10m *10m) formed the basis of these surveys. At a minimum, quadrats were surveyed at the centroid of each 1 km * 1 km grid square. Other quadrats were surveyed along the survey track depending on the presence of non-native plants. Native plant coverage was also recorded in most quadrats. The download file contains an Excel spreadsheet. The spreadsheet contains three worksheets, two of which contain keys to the third worksheet (the data worksheet). Information from the two keys is summarised below: Key to Field Headings Island was divided into 1 km x 1 km cells (see associated shapefile). A ‘track’ of minimum length 750 m (and usually between 1-2 km) was walked through each cell from 1 km centroid to 1 km centroid (again with 1 m2 and 10 m2 quadrats). At a minimum, the centroid of each cell was surveyed for alien plants using a 1 m2 and 10 m 2 quadrat. Other quadrat based surveys were carried out along the track (again with 1 m2 and 10 m2 quadrats) when alien plants were detected. In most cases native plant coverage was also noted in each quadrat. Percentage cover was calculated for Poa annua, Cerastium fontanum, and Stellaria media. Number of plants was also documented for Cerastium fontanum and Stellaria media, not Poa annua as individual plants can’t be easily identified. The presence or absence of alien species was recorded along each track. For analytical purposes, each track was divided into 10 m segments, and the presence or absence of alien plants in these was then used to calculate the ‘proportion’ of each plant in each 1 km cell. For example, a 1km track through a cell has 100 ten metre segments, if 40 of these had Poa annua present, then the cell was allocated a proportional value of 40% for Poa annua (see shapefiles for actual data and visual representation). ID Cell ID LongitudeI Centroid of 1km cell longitude LatitudeI Centroid of 1km cell latitude C_poa 1x1 m quadrat percentage cover of Poa annua - note no number of plants for Poa annua because separate plants can't be identified C_cfA 1x1 m quadrat percentage cover of Ceastium fontanum C_cfN 1x1 m number of Cerastium fontanum plants in quadrat C_smA 1x1 m quadrat percentage cover of Stellaria media C_smN 1x1 m number of Stellaria media plants Q_poa 10 x10 m quadrat percentage cover n of Poa annua -- note no number of plants for Poa annua because separate plants can't be identified Q_cfA 10 x10 m quadrat percentage cover of Ceastium fontanum Q_cfN 10 x10 m number of Cerastium fontanum plants in quadrat Q_smA 10 x10 m quadrat percentage cover of Stellaria media Q_smN 10 x10 m number of Stellaria media plants Q_veg native veg composition - see attached worksheet for key Q_rab rabbit grazing present? (centroid only) Q_die Azorell dieback present? (centroid only) Vegetation key, numbers are percentage cover, will generally add up to 100 az Azorella macquariensis fm feldmark bare no veg hb herbfield - Megaherbs - mainly Pleurophyllum sc complex of short grass, typically Agrostis, Luzula, Festuca, co Colobanthus spp. (also sometimes colo) by bryophytres mr mire pa poa annua sg short grassland sh short herbs, Acaena spp, Cardamine sp., Montia sp. sgh short grass herb complex ttg tall tussock grass, typical Poa foliosa DR damaged by rabbits
This data set contains data on the ecology of Poa annua on Macquarie Island collected over a 3 year period. It contains information on the longevity of plants (Longevity), morphology of the plants and how plants allocate biomass to the different plant components (Biomass) and vegetation surveys describing the plant communities Poa annua inhabits. The sites used in this study were distributed across an altitudinal and Poa annua density gradient and are described in the spread sheet (study sites)
This data set describes the persistence and movement of herbicides in 2 soil types from Macquarie Island. The soil characterization spreadsheet provides physical and chemical analyses of several Macquarie Island soils. A column leaching experiment was then used to assess the leaching and persistence in two Macquarie Island soils. Details of this experimental set up, and collection of leachate samples is provided in the Core leaching data spreadsheet. These samples were then analysed using LCMS to determine the concentration of glyphosate and AMPA in the leachate (Leachate samples_analysis)
This data set describes several experiments undertaken to determine the efficacy of various control methods on Poa annua on Macquarie Island. The Management Trials spreadsheet quantifies the efficacy of several physical control methods on Poa annua in situ on Macquarie Island, and their impact on species richness. The herbicide efficacy_1 rate spreadsheet quantifies the efficacy and selectivity of 12 herbicide treatments on Poa annua grown ex situ under sub-Antarctic temperatures. The herbicide efficacy_several rates spreadsheet quantifies the efficacy and selectivity of the 3 herbicides deemed to be most effective and selective on Poa annua in the above dataset, at different rates and using different application methods ex situ at sub-Antarctic temperatures The sites datasheet describes the study sites used in the Management Trials spreadsheet.
This data set describes the seed bank dynamics of Poa annua on sub-Antarctic Macquarie Island. The seed bank dynamics spreadsheet quantifies the density and depth distribution of seeds of Poa annua in soil cores collected on Macquarie Island. The seed burial spreadsheet quantifies the persistence and viability of seeds of Poa annua buried in seed burial bags on Macquarie Island for up to 2 years at varying depths
Metadata notes for RiSCC Heard Island 2003_04 season (ASAC 1015) - DGPS data and Base Station data DGPS data are described below, and associated data files listed. 1. Three Island study - Phenology and Morphology of Heard Island vascular plants. This study uses a combination of latitudinal and altitudinal investigations to separate the effects of temperature per se and seasonality on the phenology and morphology of plants. Most latitudinal studies are confounded by covariation of seasonality and temperature, whereas with altitudinal variation at different latitudes one can disentangle these effects. The presence of the Polar Frontal Zone (APFZ), which has a major effect on seasonality, would be a key feature that would enable us to investigate this. Three islands (Marion, Kerguelen, Heard) were used in the study, each of which lies in a different place relative to the APFZ and each of which is inhabited by a similar suite of species, thus removing confounding effects of species identity in understanding responses. 1a Phenology data The collection of positional data for Heard Island Scarlet Hill Phenology was collected at each site; 4 m, 50 m, 100 m, 200 m and 250 m (ASAC 1015). At each site plants of Pringlea antiscorbutica, Acaena magellanica, Poa cookii and Azorella selago were chosen (NB at 100m and 200 m no Acaena magellanica was present, and at 250 m only Pringlea antiscorbutica was sampled) within a 50 x 50 m area, where possible, and were deemed typical of the site. Only healthy mature plants at each site were chosen. At the 4 m, 100 m and 200 m altitude levels, sites were established around AWSs (Automatic Weather Stations). Each plant was flagged and numbered. Numbered flags were removed from around/beside plants at the end of the study. The numbers of plants are represented in the GPS data. Positional data are in the form of points, lines and areas. The positional data are found in the following files. 4 m phenology PT021412A.SSF4 m phenology data, N15 Poa cookii data, Poa annua record, 50 m phenology data JDS011811A.SSFcoastal study area, AWS site and phenology site 50 m phenology JDS012314A.SSF50 m phenology (Scarlet Hill) and Stephenson camp location PT020910A.SSF50 m Azorella phenology, water meadow and Poa cookii N15 sites 100 m phenology JDS020714A.SSF200 m Phenology and 100 m AWS and phenology data JDS021313A.SSF100 m Phenology (Pringlea) PT021614A.SSF250 m and 200 m phenology data, 100m phenology 200 m phenology JDS020712A.SSF200 m Phenology site and AWS JDS020714A.SSF200 m Phenology and 100 m AWS and phenology data PT021614A.SSF250 m and 200 m phenology data, 100m phenology 250 m phenology PT021614A.SSF250 m and 200 m phenology data, 100m phenology 1b Morphology data DGPS points were only taken by JDS from Fairchild Beach morphology collection sites. JDS0104.SSFAcaena magellanica, Fairchild Beach morphology JDS010511ATR3.SSFFairchild Beach morphology 2. Positional data for the mapping of the distribution of Ranunculus crassipes The distribution of Ranunculus crassipes at Heard Island was mapped between the 14-1-2004 and 15-2-2004. This mapping was undertaken by JDS, PT and JJS. Data were collected from the Skua Beach bluffs to Sooty Valley. Positional data are in the form of points, lines and areas. Data include areas of rock water meadow. The positional data are found in the following files. PTRAN021513A.SSFRanunculus crassipes transect, points and rock water meadow JDS020816A.SSFRanunculus crassipes mapping on Skua bluffs JJS011417B.SSFRanunculus crassipes mapping on Skua bluffs PT020910A.SSF50 m Azorella phenology, water meadow and Poa cookii N15 sites This mapping of the distribution of Ranunculus crassipes together with mapping of Carex trifida and Poa litorosa on Macquarie Island described by the metadata record with ID ASAC_1015_MIGPS03 contributed to the paper: Bergstrom, D.M., Turner, P.A.M., Scott, J., Copson, G. and Shaw, J. (2006) Restricted plant species on sub-Antarctic Macquarie and Heard Islands. Polar Biology 29 532-539. 3. High altitude vascular plant points and transect data Records of high altitude plants were taken by JDS and RC. Some data from the files JDS012510A.SSF and JDS012510A_CPscarlet.ssf have not been corrected, as stated above. JDS012510A.SSFScarlet Hill high altitude transect JDS012510A_CPscarlet.ssfScarlet Hill high altitude transect - control points only for JJS JDS013111A.SSFLong Beach high altitude data and Apple location JDS020112A.SSFLong Beach high altitude data RC0302.SSFRobb Clifton control points for JJS 'and high altitude' RC0402.SSFRobb Clifton control points for JJS 'and high altitude' RC0502.SSFRobb Clifton control points for JJS 'and high altitude' Other datafiles recorded by PT, JDS and RC under ASAC 1015 include PT022012A.SSFFuel drum retaining wall, Spit Camp JDS012113A.SSFWinston Lagoon JDS012415A.SSFAcaena - 100 m south edge of Scarlet Hill JDS012914A.SSFLambeth 1 JJS Control point JDS123112A.SSFPoa annua - Dovers moraine JDSPHOTO020118A.SSFPhoto points - Dana Bergstrom data PT010621A.SSFSK25 - not sure what this data are RC0202.SSFRobb Clifton control points for JJS
2000-01 fieldwork undertaken Heard Island 53 deg. 05 min. S., 73 deg. 30 min. E. Field area covered: southeast end of island from Long Beach to Gilchrist Beach. 150 GPS control points collected on 1986-1987 airphotos, using handheld GPS unit. To be used for a vegetation mapping project in progress for mapping of Heard Island vegetation communities, along with vegetation quadrat data covering major plant communities of the island. Vegetation quadrat data collected on monitoring sites set up in 1987 to record changes in vegetation, especially the grass Poa annua. Fixed photo-points re-photographed to record aspects of vegetation and glacier-front changes over 12 years. Heard Island environments are changing steadily as global climate change occurs. This project gathered information that will enable completion of a vegetation map for Heard Island; revisited sites studied and marked in 1987 to document changes in vegetation, including colonisation of recently deglaciated land; and provided advice for visitor management protocols to minimise vegetation disturbance. The parts of the island visited were surveyed for new species that may be recently arrived or previously unrecorded, and changes in species which had limited distribution in 1987 were documented. 2003-04 fieldwork undertaken The fieldwork provides strong evidence of vegetation and habitat changes over the past 16 years, and a sound basis for future monitoring in a dynamic environment sensitive to global change. Work included documentation of 200 photopoints, mapping of limited-distribution plant species, and ground-checking of vegetation mapping from 1987. A solid baseline of 1987 data (photopoints, fixed transects) was remeasured. A new vascular plant species was recorded, Leptinella plumosa, increasing the vascular species list to 12. Differential GPS allowed precise documentation of 200 mapping control points for AADC and accurate locations of all photopoints, species mapping and fixed transects. Descriptions of data collected for each JJS Data dictionary feature, and additional attributes, are included in metadata notes (word docs) accompanying the DGPS data. The data associated with this metadata record are as follows: a) Differential GPS data. The DGPS data in (b) and (c) below originate from these data. i) Corrected data (Trimble) ii) Uncorrected data (Trimble) iii) Shapefiles of the corrected data with original data dictionary IDs iv) Metadata notes (word doc) for Trimble files b) Control point data i) Shapefile of DGPS control points ii) Metadata notes (word doc) for DGPS control points iii) Excel file of hand-held control points 2000 iv) Metadata notes (word doc) for hand-held control points 2000 v) Excel file of hand-held control points 2003 vi) Metadata notes (word doc) for hand-held control points 2003 c) Vegetation and miscellaneous data i) Five shapefiles of DGPS locations for vegetation data and miscellaneous features ii) One shapefile of hand-held GPS locations for vegetation data. iii) Metadata notes (word doc) for veg. and misc. data
Observations on the phenology, breeding systems and seed germination and vegetation reproduction of 10 widespread species of flowering plants were made over three summer field seasons. Species studied Cardamine corymbosa, Epilobium pendunclare, Montia Fontana, Poa annua, Poa foliosa Agrostis magellanica, Luzula crinita, Pluerophyllum hookeri, Stilbocarpa polaris, Azorealla selago Data for the project are included in Bergstrom, D.M., Selkirk, P.M., Keenan, H.M. and Wilson, M.E. (1997) Reproductive behaviour of ten flowering plants species on subantarctic Macquarie Island. Borgen, L., Jonsell, B. (ed.) Opera Botanica. 132. 109-120;