Seed input as a factor in the regeneration of strip-mine wastes in Saskatchewan

1980 ◽  
Vol 58 (13) ◽  
pp. 1490-1495 ◽  
Author(s):  
O. W. Archibold
Keyword(s):  
Vegetation Cover ◽  
Abundant Species ◽  
Mine Wastes ◽  
Kochia Scoparia ◽  
Subsequent Removal ◽  
Strip Mine ◽  
Spoil Banks

Seed traps were set out on the spoil banks created by strip-mine coal operations in southeastern Saskatchewan. A total of 2721 seeds (2387 seeds/m2) was collected in the 1st season of which 97% was comprised of forb seeds and 3% of grass caryopses; 4216 seeds (3798 seeds/m2) were trapped in the 2nd year. Kochia scoparia was the most abundant species. Adequate seed input is occurring in the area to provide a good vegetation cover. The general absence of vegetation on the wastes must therefore reflect subsequent removal and deterioration of the seeds.

scholarly journals Influence of Spartina alterniflora and tide level on the structure of polychaete associations in an euryhallne salt marsh in cananéia lagoon estuarine region (SE Brazil)

1997 ◽  
Vol 45 (1-2) ◽  
pp. 24-34 ◽  
Author(s):  
Fabiano da Silva Attolini ◽  
Máurea Nicoletti Flynn ◽  
Airton Santo Tarararn
Keyword(s):  
Spartina Alterniflora ◽  
Vegetation Cover ◽  
High Water ◽  
Abundant Species ◽  
Common Species ◽  
Individual Species ◽  
Mean High Water ◽  
Number Of Species ◽  
Se Brazil ◽  
Tide Level

Polychaete species composition, abundance and seasonal variation were analyzed in relation to Spartina alterniflora cover and tide level at Ponta do Arrozal, Cananéia, during 1989/1990. Two intertidal stations were located on the S. alterniflora bellt, one ca mean high water of neap tides (MHWN) and the other ca mean high water of spring tides (MHWS). Two other stations were established at corresponding tide levels at an adjacent site devoid of vegetation. A total of 17 species were collected. Each station was sampled twice seasonally with a 20 cm of diameter corer. Capitella capitata, Isolda pulchella, Nereis oligohalina and Lumbrineris sp were the most abundant species. Statistically significant differences bettween the vegetated and bare sites considered were observed for the number of species, density, diversity and evenness, with their values being higher at the vegetated site. Multivariate analysis showed spatial variations of the fauna according to vegetation cover and tide level. In relation to vegetation cover, polychaetes assemblages were distinguishable mainly by individual species densities of the more common species, since the most abundant species were present at the vegetated and bare sites. In relation to tide level, the faunal densities and number of species at the MHWN station were significantly higher than those at the MHWS station mainly at the bare site.

scholarly journals Immediate Effects of Prescribed Burning on Soil Mite (Acari: Oribatida) Communities in a Scots Pine (Pinus Sylvestris) Forest, Latvia

2021 ◽  
Vol 75 (3) ◽  
pp. 220-228
Author(s):  
Rebeka Šķērstiņa ◽  
Uģis Kagainis
Keyword(s):  
Scots Pine ◽  
Vegetation Cover ◽  
Prescribed Burning ◽  
Abiotic Factors ◽  
Fire Severity ◽  
Oribatid Mite ◽  
Abundant Species ◽  
Soil Mite ◽  
Fire Disturbances ◽  
Mite Communities

Abstract Prescribed burning is used to maintain and restore habitats, to protect and increase species bio-diversity. Knowledge about soil fauna is limited, especially on community responses to fire disturbances. The aim of this study was to determine the immediate effects of prescribed burning on soil armoured mite (Acari: Oribatida) communities, vegetation cover and soil physiochemical properties in a boreal Scots pine forest in Latvia. Soil samples were collected on the day of the prescribed burning in the protected landscape area “Ādaži” and 16 days after. No significant changes in abiotic factors were found. Fire significantly decreased the vegetation cover. After the burning, the total number of oribatid mites decreased by 93%, and the number of species by 77%. Changes in oribatid mite communities were significantly influenced by fire severity. The number of individuals decreased among all taxa, except Brachychthonioidea spp. and Cosmochthonius lanathus. A significant decrease in abundance was observed in previously abundant species — Suctobelbella spp., Oppiella nova and Tectocepheus velatus. After the burning, Suctobelbella spp. was an eudominant and Tectocepheus spp. was a dominant genus.

Stromatoporoids from the Famennian (Devonian) Wabamun Formation, Normandville oilfield, north–central Alberta, Canada

1988 ◽  
Vol 62 (03) ◽  
pp. 411-419 ◽  
Author(s):  
Colin W. Stearn
Keyword(s):  
Patch Reef ◽  
Abundant Species ◽  
The Other ◽  
North Central ◽  
Biotic Crisis

Stromatoporoids are the principal framebuilding organisms in the patch reef that is part of the reservoir of the Normandville field. The reef is 10 m thick and 1.5 km2in area and demonstrates that stromatoporoids retained their ability to build reefal edifices into Famennian time despite the biotic crisis at the close of Frasnian time. The fauna is dominated by labechiids but includes three non-labechiid species. The most abundant species isStylostroma sinense(Dong) butLabechia palliseriStearn is also common. Both these species are highly variable and are described in terms of multiple phases that occur in a single skeleton. The other species described areClathrostromacf.C. jukkenseYavorsky,Gerronostromasp. (a columnar species), andStromatoporasp. The fauna belongs in Famennian/Strunian assemblage 2 as defined by Stearn et al. (1988).

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