General geology and peat resources of the Siak Kanan and Bengkalis Island peat deposits, Sumatra, Indonesia

Phragmites communis, Eriophorum vaginatum, Calluna vulgaris, and Sphagnum palustre are representative of plants whose remains are frequently encountered in Scottish peat deposits. The effects of preservation in peat on the surface features of their leaves were followed by electron microscopy. Wax projections were observed on the surfaces of mature living leaves of Phragmites and Eriophorum but not on Calluna or Sphagnum. Details of cell wall outlines and stomata (or pores) were clearly defined in Phragmites, Eriophorum, and Sphagnum, but obscured in Calluna. The previous year's leaves differed by displaying a general absence of wax projections, an erosion of the cuticular surface, which took the form of either a loss in definition of the cell wall outlines or a definite etching of the surface, and the presence of numerous microorganisms. The surface features of preserved leaves exhibited to a greater degree this erosion of cell wall outline and cuticular surface. This preliminary study has indicated that major alterations in the submicroscopic features of cuticularized leaf surfaces occur at the leaf litter stage. The primary agents responsible for this degradation would appear to be microorganisms in conjunction with the physical and chemical processes of peat formation.

Download Full-text

General geology and geomorphology of the Mars Pathfinder landing site

Journal of Geophysical Research Atmospheres ◽

10.1029/1998je900021 ◽

1999 ◽

Vol 104 (E4) ◽

pp. 8555-8571 ◽

Cited By ~ 30

Author(s):

A. W. Ward ◽

L. R. Gaddis ◽

R. L. Kirk ◽

L. A. Soderblom ◽

K. L. Tanaka ◽

...

Keyword(s):

Landing Site ◽

General Geology ◽

Mars Pathfinder

Download Full-text

RATIONALE FOR MONITORING GROUNDWATER LEVELS IN THE REHABILITATED PEATLANDS OF PRIPYAT POLESIE

Nature Management ◽

10.47612/2079-3928-2020-2-33-43 ◽

2020 ◽

pp. 33-43

Author(s):

Olga N. Ratnicava ◽

Irina P. Lisitsyna ◽

Inna V. Аgeichik

Keyword(s):

Field Studies ◽

Natural State ◽

Groundwater Levels ◽

Discharge Water ◽

Peat Deposits ◽

Disturbed Areas ◽

Key Points ◽

Before And After ◽

Vegetation Maps ◽

Relationship Of

Based on studies of geomorphology, stratigraphy, hydrology, various maps of Polesie, zones of influence of amelioration canals, vegetation maps, modern satellite images, as well as field studies of peatlands of Pripyat Polesie, two independent drainage systems have been identified, with a network of amelioration canals that intensively discharge water into the rivers Stwiga and Ybort`. Maps of key points were built In GIS-format, on which five sites were laid in the field within the Mezhch and Neresnya peat deposits for further long-term monitoring of GWL parameters. The locations of the sensors installation are based on the relationship of bog phytocenoses with the average annual GWL values and the amplitude of their fluctuations. Analysis of the GWL parameters before and after environmental rehabilitation measures will allow assessing the effectiveness of planned measures in disturbed areas and obtaining new data on areas of peat deposits in their natural state.

Download Full-text