scholarly journals Ecological and evolutionary trends in wetlands: Evidence from seeds and seed banks in New South Wales, Australia and New Jersey, USA

2000 ◽  
Vol 15 (2) ◽  
pp. 97-112 ◽  
Author(s):  
Mary A. Leck ◽  
Margaret A. Brock
Keyword(s):  
New Jersey ◽  
New South ◽  
New South Wales ◽  
Seed Banks ◽  
Evolutionary Trends ◽  
South Wales

Seed production and seedling emergence of Giant Parramatta grass on the north coast of New South Wales

1996 ◽  
Vol 36 (3) ◽  
pp. 299 ◽  
Author(s):  
TS Andrews ◽  
RDB Whalley ◽  
CE Jones
Keyword(s):  
Seed Production ◽  
Seed Bank ◽  
New South ◽  
New South Wales ◽  
Seed Banks ◽  
North Coast ◽  
The North ◽  
South Wales ◽  
Seed Fall ◽  
The Impact

Inputs and losses from Giant Parramatta grass [GPG, Sporobolus indicus (L.) R. Br. var. major (Buse) Baaijens] soil seed banks were quantified on the North Coast of New South Wales. Monthly potential seed production and actual seed fall was estimated at Valla during 1991-92. Total potential production was >668 000 seeds/m2 for the season, while seed fall was >146000 seeds/m2. Seed fall >10000 seeds/m2.month was recorded from January until May, with further seed falls recorded in June and July. The impact of seed production on seed banks was assessed by estimating seed banks in the seed production quadrats before and after seed fall. Seed banks in 4 of the 6 sites decreased in year 2, although seed numbers at 1 damp site increased markedly. Defoliation from mid-December until February, April or June prevented seed production, reducing seed banks by 34% over 7 months. Seed banks in undefoliated plots increased by 3300 seeds/m2, although seed fall was estimated at >114 000 seeds/m2. Emergence of GPG seedlings from artificially established and naturally occurring, persistent seed banks was recorded for 3 years from bare and vegetated treatment plots. Sown seeds showed high levels of innate dormancy and only 4% of seeds emerged when sown immediately after collection. Longer storage of seeds after collection resulted in more seedlings emerging. Estimates of persistent seed banks ranged from 1650 to about 21260 seeds/m2. Most seedlings emerged in spring or autumn and this was correlated with rainfall but not with ambient temperatures. Rates of seed bank decline in both bare and vegetated treatment plots was estimated by fitting exponential decay curves to seed bank estimates. Assuming no further seed inputs, it was estimated that it would take about 3 and 5 years, respectively, for seed banks to decline to 150 seeds/m2 in bare and vegetated treatments.

scholarly journals A new dasyurid marsupial from eastern Queensland, Australia: the Buff-footed Antechinus, Antechinus mysticus sp. nov. (Marsupialia: Dasyuridae)

Zootaxa ◽  
2012 ◽  
Vol 3515 (1) ◽  
pp. 1 ◽  
Author(s):  
ANDREW M BAKER ◽  
THOMAS Y MUTTON ◽  
STEVE VAN DYCK
Keyword(s):  
New Species ◽  
Genetic Structure ◽  
New South ◽  
New South Wales ◽  
Geographic Range ◽  
Evolutionary Trends ◽  
Key To Species ◽  
North East ◽  
South Wales ◽  
Molar Teeth

Antechinus mysticus sp. nov. occurs in coastal Australia, ranging from just north of the Queensland (Qld)/New SouthWales (NSW) border to Mackay (mid-east Qld), and is sympatric with A. flavipes (Waterhouse) and A. subtropicus VanDyck & Crowther in south-east Qld. The new species can be distinguished in the field, having paler feet and tail base thanA. flavipes and a greyish head that merges to buff-yellow on the rump and flanks, compared with the more uniform brownhead and body of A. subtropicus and A. stuartii Macleay. Features of the dentary can also be used for identification: A.mysticus differs from A. flavipes in having smaller molar teeth, from A. subtropicus in having a larger gap between frontand rear palatal vacuities, and from A. stuartii in having a generally broader snout. Here, we present a morphologicalanalysis of the new species in comparison with every member of the genus, including a discussion of genetic structure andbroader evolutionary trends, as well as an identification key to species based on dental characters. It seems likely that theknown geographic range of A. mysticus will expand as taxonomic focus on the genus is concentrated in south-east Queensland and north-east New South Wales.

Charophyte Occurrence, Seed Banks and Establishment in Farm Dams in New South Wales

1999 ◽  
Vol 47 (3) ◽  
pp. 437 ◽  
Author(s):  
Michelle T. Casanova ◽  
Margaret A. Brock
Keyword(s):  
New South ◽  
New South Wales ◽  
Water Clarity ◽  
High Water ◽  
Seed Banks ◽  
Water Bodies ◽  
Dissolved Phosphorus ◽  
South Wales ◽  
High Turbidity ◽  
Chara Australis

Farm dams are an important and common water resource in rural Australia. They provide relatively permanent surface water for stock and wildlife. They typically have high turbidity and high levels of disturbance by stock. The occurrence of charophytes in these water bodies was examined, as well as the conditions under which they germinated and established. Charophytes were found in 15% of 65 farm dams surveyed in two regions in New South Wales, Australia. However, charophytes germinated from 64.5% of farm dam seed banks sampled (n = 17). Species found were Chara australis R.Br., C. fibrosa Agardh ex Bruzelius, C. globularis Thuillier, C. muelleri A.Br., Nitella cristata A.Br. and N. tasmanica A.Br. Farm dams in which charophytes were found both in the survey and in the seed bank had lower turbidity, lower dissolved phosphorus levels and more extensive submerged plant communities than average. Charophytes established from the seed banks under experimentally induced water regimes when high water clarity was maintained and the disturbance of stock grazing was removed. Farm dams can support populations of perennial and annual charophyte species, and provide a habitat that is less available in naturally occurring shallow water bodies of the regions.

Xanthomonas hyacinthi. [Distribution map].

2000 ◽  
Author(s):  
Keyword(s):  
New Jersey ◽  
North America ◽  
Geographical Distribution ◽  
New South ◽  
New South Wales ◽  
Republic Of Georgia ◽  
Distribution Map ◽  
South Wales ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Xanthomonas hyacinthi (Wakker) Vauterin et al. Bacteria Hosts: Hyacinthus. Information is given on the geographical distribution in EUROPE, Austria, Denmark, Finland, Germany, Hungary, Ireland, Italy, Mainland Italy, Netherlands, Poland, Romania, Sweden, UK, Yugoslavia (Fed. Rep.), ASIA, Republic of Georgia, Japan, NORTH AMERICA, USA, Massachusetts, Michigan, Minnesota, New Jersey, Texas, Washington, OCEANIA, Australia, New South Wales, Tasmania, Victoria.

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