Native legume establishment on acidic coal mining overburden at Collie, Western Australia

1985 ◽  
Vol 7 (4) ◽  
pp. 141-144 ◽  
Author(s):  
John M. Koch ◽  
David T. Bell
Keyword(s):  
Coal Mining ◽  
Western Australia ◽  
Native Legume

The Mineral Nutrition of Developing Fruits of Kennedia prostrata R. Br. Ex Ait., A Perennial Australian Legume

1980 ◽  
Vol 28 (6) ◽  
pp. 633 ◽  
Author(s):  
PJ Hocking
Keyword(s):  
Western Australia ◽  
Mineral Nutrition ◽  
Major Part ◽  
Dry Matter ◽  
Natural Habitat ◽  
Alkaline Ph ◽  
Phloem Sap ◽  
Native Legume ◽  
High Level

The nutrition of developing fruits of K. prostrata was studied in natural habitat near Perth, Western Australia. Changes in the contents of specific nutrients in pods and seeds are described. Seeds accumulated > 80% of the N and P of the fruit, 36-58% of its K, S, Ca, Mg, Fe and Zn but < 25% of its Na. Pods lost 77-87% of their N and P, 20-39% of their Mg, Zn, Mn and Cu, and 9-15% of their K, S, Ca and Fe during senescence. Na was not withdrawn from pods. Retranslocation from pods were considered to be capable of providing > 50% of the N and P accumulated by seeds, although the values for most nutrients and DM ranged from 16 to 35%. Fruit-tip exudate had some characteristics of phloem sap (e.g. alkaline pH, 15-2096 sucrose, a high level of K-), but contained 2 . 5 mg/ml Mg2+ and appeared to be contaminated with mucilage. The testa contained 75% of the seed's dry matter and the major part of its K, Ca, Mg, Mn and Ca; the embryo most of the seed's N, P and S. Information for Kennedla is discussed in relation to data for cultivated legumes as there is no comparable study on another native legume.

Coal mining

AccessScience ◽  
2015 ◽  
Keyword(s):  
Coal Mining

Keeping children at home safely: A statutory agency's quest in Western Australia

2013 ◽  
Author(s):  
Helen McMahon ◽  
Katherine Fendley
Keyword(s):  
Western Australia ◽  
At Home

Coal Mining

1886 ◽  
Vol 22 (560supp) ◽  
pp. 8940-8940 ◽  
Keyword(s):  
Coal Mining

Persistence of giants: population dynamics of the limpet Scutellastra laticostata on rocky shores in Western Australia

2020 ◽  
Vol 646 ◽  
pp. 79-92
Author(s):  
RE Scheibling ◽  
R Black
Keyword(s):  
Population Dynamics ◽  
Western Australia ◽  
Size Structure ◽  
Survival Rates ◽  
Maximum Size ◽  
High Rate ◽  
Adult Survival ◽  
Rocky Shores ◽  
Adult Size ◽  
Decadal Time Scale

Population dynamics and life history traits of the ‘giant’ limpet Scutellastra laticostata on intertidal limestone platforms at Rottnest Island, Western Australia, were recorded by interannual (January/February) monitoring of limpet density and size structure, and relocation of marked individuals, at 3 locations over periods of 13-16 yr between 1993 and 2020. Limpet densities ranged from 4 to 9 ind. m-2 on wave-swept seaward margins of platforms at 2 locations and on a rocky notch at the landward margin of the platform at a third. Juvenile recruits (25-55 mm shell length) were present each year, usually at low densities (<1 m-2), but localized pulses of recruitment occurred in some years. Annual survival rates of marked limpets varied among sites and cohorts, ranging from 0.42 yr-1 at the notch to 0.79 and 0.87 yr-1 on the platforms. A mass mortality of limpets on the platforms occurred in 2003, likely mediated by thermal stress during daytime low tides, coincident with high air temperatures and calm seas. Juveniles grew rapidly to adult size within 2 yr. Asymptotic size (L∞, von Bertalanffy growth model) ranged from 89 to 97 mm, and maximum size from 100 to 113 mm, on platforms. Growth rate and maximum size were lower on the notch. Our empirical observations and simulation models suggest that these populations are relatively stable on a decadal time scale. The frequency and magnitude of recruitment pulses and high rate of adult survival provide considerable inertia, enabling persistence of these populations in the face of sporadic climatic extremes.

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