Quote:
Alpine and subalpine snow patch vegetation on the Bogong High Plains, SE Australia
Author(s): Wahren CH, Williams RJ, Papst WA
Source: JOURNAL OF VEGETATION SCIENCE Volume: 12 Issue: 6 Pages: 779-790 Published: DEC 2001
Times Cited: 6 References: 67 Citation MapCitation Map
Abstract: Snow patch vegetation in Australia is rare, being restricted to the relatively small area of alpine and subalpine country in the highlands of southeastern Australia. Snow patch vegetation occurs on steeper, sheltered southeastern slopes, where snow persists until well into the growing season (December/January). We surveyed the vegetation of 33 snow patch sites in the alpine and subalpine tracts of the Bogong High Plains, within the Alpine National Park, in Victoria. The vegetation was dominated by herbs and graminoids, with few shrubs and mosses. Major structural assemblages identified included closed herb-fields dominated by Celmisia spp, and grasslands dominated by Poa fawcettiae or Poa costiniana. These assemblages occurred on mineral soils. Open herb-fields dominated by Caltha introloba and several sedge species occurred on rocky and stony substrata. Vegetation-environment relationships were explored by ordination and vector fitting. There was significant variation in the floristic composition of snow patch vegetation as a function of duration of snow cover, altitude, slope and site rockiness. Alpine sites were floristically distinct from subalpine sites, with a greater cover of Celmisia spp. and a lesser cover of low shrubs in the former. There was floristic variation within some snow patches as a function of slope position (upper, middle or lower slope) but this was not consistent across sites. The current condition of snow patch vegetation on the Bogong High Plains is degraded, with bare ground exceeding 20% cover at most sites. Snow patch vegetation is utilized preferentially by domestic cattle, which graze parts of the Bogong High Plains in summer. Such grazing is a potential threat to this rare vegetation type.
Document Type: Article
Language: English
Author Keywords: grassland; herb-field; national park; nivation; non-metric multidimensional scaling; ordination; snow bank; vector fitting
KeyWords Plus: PATTERNS; TASMANIA; ACCUMULATION; COMMUNITIES; GRASSLANDS; HEATHLAND; DYNAMICS; VICTORIA
Reprint Address: Williams, RJ (reprint author), CSIRO, PMB 44, Winnellie, NT 0821 Australia
Addresses:
1. CSIRO, Winnellie, NT 0821 Australia
2. La Trobe Univ, Dept Agr Sci, Bundoora, Vic 3083 Australia
3. Dept Nat Resources & Environm, Ctr Land Protect Res, Melbourne, Vic Australia
Quote:
LONG-TERM VEGETATION CHANGE IN RELATION TO CATTLE GRAZING IN SUB-ALPINE GRASSLAND AND HEATHLAND ON THE BOGONG HIGH-PLAINS - AN ANALYSIS OF VEGETATION RECORDS FROM 1945 TO 1994
Author(s): WAHREN CHA, PAPST WA, WILLIAMS RJ
Source: AUSTRALIAN JOURNAL OF BOTANY Volume: 42 Issue: 6 Pages: 607-639 Published: 1994
Times Cited: 44 References: 64 Citation MapCitation Map
Abstract: Changes in vegetation composition and structure are described for grassland and heathland communities on the Bogong High Plains, in the Victorian Alpine National Park. The data are based on long-term records collected from permanent reference plots over the period 1945 to 1994 from plots established in 1945, 1946 and 1979. In the Pretty Valley grassland plots, established in 1946, cattle grazing has prevented the large-scale regeneration of a number of tall, palatable forbs and short, palatable shrubs, while in the absence of grazing, the cover of these Life forms increased substantially. The amount of bare ground and loose litter was significantly greater on the grazed compared with the ungrazed plot. Between 1979 and 1994, there was little or no identifiable trend in the cover of Vegetation or bare ground at either the Pretty Valley grazed site, or two additional grazed grassland sites established nearby in 1979. The current condition of grazed grassland on the Bogong High Plains is interpreted as stable, yet degraded. Improvement in condition will occur in the absence of grazing. In the Rocky Valley open heathland plots, established in 1945, increases in shrub cover over the study period were due to growth of shrubs following the 1939 bushfires that burnt much of the Bogong High Plains. From 1945-1979 shorter-lived shrubs increased in cover; since 1979, these shrubs have senesced, and are being replaced mainly by grasses. On the grazed plot longer lived, taller shrubs have continued to increase in cover and are not senescing. Between 1979 and 1989, total shrub cover declined on the ungrazed plot, but increased on the grazed plot. There was no evidence that grazing has reduced shrub cover, and therefore potential fire risk, in open heathland. These findings have significant management implications for the Alpine National Park and are consistent with those from other regions in the Australian alps.
Document Type: Article
Language: English
KeyWords Plus: SERENGETI-NATIONAL-PARK; ARTIFICIAL DISTURBANCES; RANGE TRANSECTS; ALPINE RANGE; COMMUNITIES; VICTORIA; AUSTRALIA; KOSCIUSKO; TRENDS; PERTURBATIONS
Reprint Address: WAHREN, CHA (reprint author), MONASH UNIV, DEPT ECOL & EVOLUT BIOL, CLAYTON, VIC 3168 AUSTRALIA
Addresses:
1. DEPT CONSERVAT & NAT RESOURCES, MELBOURNE, VIC 3002 AUSTRALIA
Publisher: C S I R O PUBLICATIONS, 150 OXFORD ST, PO BOX 1139, COLLINGWOOD VICTORIA 3066, AUSTRALIA
IDS Number: QD749
ISSN: 0067-1924
And for the record, I am not an ecologist and I am not too concerned about the cattle one way or the other.