Data

A Study of the Nitrogen-fixing Microbiota of Macquarie Island Plant Communities

Australian Antarctic Data Centre
LINE, MARTIN
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://data.aad.gov.au/metadata/records/ASAC_194&rft.title=A Study of the Nitrogen-fixing Microbiota of Macquarie Island Plant Communities&rft.identifier=https://data.aad.gov.au/metadata/records/ASAC_194&rft.publisher=Australian Antarctic Data Centre&rft.description=The nitrogen fixing biota of Macquarie Island are dominated by cyanobacteria growing epiphytically or symbiotically with plants or lichens. Highest rates of acetylene reduction (N-fixation) were found in the leafy lichen Peltigera sp. Colonising herbfields and short grasslands, and in the coastal angiosperm Colobanthus muscoides. Significant rates of N-fixation were also associated with the liverwort Jamesoniella colorata commonly occurring in coastal and plateau mires, in a moss-bed of Dicranella cardotii colonising a land-slip face on the grassland slopes at 100m altitude, and within polsters of the mosses Ditrichum strictum and Andreaea sp. found in exposed localities on the plateau at 200-300m altitude. It was concluded that the common feature of plants supporting active N-fixation in dry habitats was the dense packing of stems and leaves, enabling water translocation to the cyanobacterial zone by wick action. Epiphytic cyanobacterial fixation in wet habitats was widespread and not restricted to plant species. This work was published in Polar Biology, 11: 601-606.&rft.creator=LINE, MARTIN &rft.date=2000&rft.coverage=northlimit=-54.0; southlimit=-54.5; westlimit=158.0; eastLimit=159.0; projection=WGS84&rft.coverage=northlimit=-54.0; southlimit=-54.5; westlimit=158.0; eastLimit=159.0; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_194 when using these data.&rft_subject=biota&rft_subject=NITROGEN&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=VEGETATION&rft_subject=BACTERIA/ARCHAEA&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANGIOSPERMS (FLOWERING PLANTS)&rft_subject=PLANTS&rft_subject=MOSSES/HORNWORTS/LIVERWORTS&rft_subject=LICHENS&rft_subject=FUNGI&rft_subject=NUTRIENT CYCLING&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=ECOSYSTEM FUNCTIONS&rft_subject=CYANOBACTERIA&rft_subject=MACQUARIE ISLAND&rft_subject=NITROGEN FIXING&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_194 when using these data.

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Brief description

The nitrogen fixing biota of Macquarie Island are dominated by cyanobacteria growing epiphytically or symbiotically with plants or lichens. Highest rates of acetylene reduction (N-fixation) were found in the leafy lichen Peltigera sp. Colonising herbfields and short grasslands, and in the coastal angiosperm Colobanthus muscoides. Significant rates of N-fixation were also associated with the liverwort Jamesoniella colorata commonly occurring in coastal and plateau mires, in a moss-bed of Dicranella cardotii colonising a land-slip face on the grassland slopes at 100m altitude, and within polsters of the mosses Ditrichum strictum and Andreaea sp. found in exposed localities on the plateau at 200-300m altitude. It was concluded that the common feature of plants supporting active N-fixation in dry habitats was the dense packing of stems and leaves, enabling water translocation to the cyanobacterial zone by wick action. Epiphytic cyanobacterial fixation in wet habitats was widespread and not restricted to plant species. This work was published in Polar Biology, 11: 601-606.

Issued: 2000-07-20

Data time period: 1990-12-01 to 1991-01-31

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159,-54 159,-54.5 158,-54.5 158,-54 159,-54

158.5,-54.25

text: northlimit=-54.0; southlimit=-54.5; westlimit=158.0; eastLimit=159.0; projection=WGS84

Subjects
ANGIOSPERMS (FLOWERING PLANTS) | BACTERIA/ARCHAEA | BIOLOGICAL CLASSIFICATION | BIOSPHERE | CYANOBACTERIA | EARTH SCIENCE | ECOLOGICAL DYNAMICS | ECOSYSTEM FUNCTIONS | FUNGI | GEOGRAPHIC REGION > POLAR | LICHENS | MACQUARIE ISLAND | MOSSES/HORNWORTS/LIVERWORTS | NITROGEN | NITROGEN FIXING | NUTRIENT CYCLING | OCEAN > SOUTHERN OCEAN | OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND | PLANTS | VEGETATION | biota |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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