Environmental Modification of Flowering and Viviparous Proliferation in Festuca vivipara and F. ovina

Oikos ◽  
1988 ◽  
Vol 51 (2) ◽  
pp. 171 ◽  
Author(s):  
Ola M. Heide
Keyword(s):  
Environmental Modification ◽  
Festuca Vivipara

scholarly journals Metals in Calluna vulgaris, Empetrum nigrum, Festuca vivipara and Thymus praecox ssp. arcticus in the geothermal areas of Iceland

2021 ◽  
Author(s):  
Adam Rajsz ◽  
Bronisław Wojtuń ◽  
Aleksandra Samecka-Cymerman ◽  
Paweł Wąsowicz ◽  
Lucyna Mróz ◽  
...  
Keyword(s):  
Active Sites ◽  
Calluna Vulgaris ◽  
Bioaccumulation Factor ◽  
The Other ◽  
Extreme Situation ◽  
Empetrum Nigrum ◽  
Geothermal Activity ◽  
High Concentrations ◽  
And Control ◽  
Festuca Vivipara

AbstractThis investigation was conducted to identify the content of metals in Calluna vulgaris (family Ericaceae), Empetrum nigrum (family Ericaceae), Festuca vivipara (family Poaceae) and Thymus praecox subsp. arcticus (family Lamiaceae), as well as in the soils where they were growing in eight geothermal heathlands in Iceland. Investigation into the vegetation of geothermal areas is crucial and may contribute to their proper protection in the future and bring more understanding under what conditions the plants respond to an ecologically more extreme situation. Plants from geothermally active sites were enriched with metals as compared to the same species from non-geothermal control sites (at an average from about 150 m from geothermal activity). The enriched metals consisted of Cd, Co, Cu, Fe and Ni in C. vulgaris; Cd, Mn and Ti in E. nigrum; Hg and Pb in F. vivipara; and Cd, Fe and Hg in T. praecox. Notably, C. vulgaris, E. nigrum, F. vivipara and T. praecox had remarkably high concentrations of Ti at levels typical of toxicity thresholds. Cd and Pb (except for C. vulgaris and F. vivipara) were not accumulated in the shoots of geothermal plants. C. vulgaris from geothermal and control sites was characterised by the highest bioaccumulation factor (BF) of Ti and Mn; E. nigrum and F. vivipara by the highest BF of Ti and Cr; and T. praecox by the highest BF of Ti and Zn compared to the other elements. In comparison with the other examined species, F. vivipara from geothermal sites had the highest concentration of Ti in above-ground parts at any concentration of plant-available Ti in soil.

scholarly journals Lawnscaping Perth: Water Supply, Gardens, and Scarcity, 1890-1925

2017 ◽  
Vol 46 (1) ◽  
pp. 63-78 ◽  
Author(s):  
Andrea Gaynor
Keyword(s):  
Water Supply ◽  
Natural System ◽  
Environmental Modification ◽  
Bodily Experience ◽  
Capital Cities ◽  
Australian State ◽  
State Capital ◽  
Water Restrictions

While Perth’s climate has been getting drier for at least four decades, its citizens maintain an ongoing commitment to year-round green lawns and gardens (or “lawnscapes”), and a resistance to water restrictions that is more pronounced than in other Australian state capital cities. This article demonstrates that these features of contemporary Perth emerged from, and continue to bear the imprint of, an earlier socio-natural system that brought together a town water supply, sprinkler technology, plants, and a multidimensional cultural desire for environmental modification. As important markers of civilization and prosperity, Perth’s emergent lawnscapes assuaged colonial anxieties about the settlement’s status. Conspicuously shaped by collective understandings of imperial urban hierarchies, residents’ lawnscaping projects were also driven by their bodily experience of sand, heat, and dust: they were in part a response to the challenge of keeping homes and families clean and cool in a city of hot summers and ubiquitous sand.

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