Phytoplankton productivity in littoral adjacent to peat-bog in two limnologically distinct lakes (Łęczyńsko-Włodawskie Lake District)

2009 ◽  
Vol 9 (2-4) ◽  
pp. 201-207
Author(s):  
Artur Serafin
Keyword(s):  
Peat Bog ◽  
Lake District ◽  
Phytoplankton Productivity

scholarly journals John Francis Talling. 23 March 1929—20 June 2017

2019 ◽  
Vol 66 ◽  
pp. 447-461
Author(s):  
S. C. Maberly ◽  
S. I. Heaney
Keyword(s):  
Soda Lakes ◽  
Field Measurements ◽  
Limiting Factor ◽  
Lake District ◽  
Phytoplankton Productivity ◽  
Freshwater Phytoplankton ◽  
Underwater Light Climate ◽  
Light Quantity ◽  
African Rift ◽  
Freshwater Biological Association

John (Jack) Francis Talling was a master limnologist who pioneered much of our understanding of the River Nile, the great lakes of the African Rift Valley and those of the English Lake District. He was one of the world's leading authorities on the ecophysiology of freshwater phytoplankton and specialized in the control of their productivity by light and carbon dioxide. His perspectives were formed by interaction with leading scientists of the day, mainly at the Freshwater Biological Association, Cumbria, but also at laboratories in Africa and at the Scripps Institution of Oceanography, California. Jack's work on the effects of light on phytoplankton productivity was based on detailed measurements of the underwater light climate in lakes and oceans as well as laboratory and field measurements of the response of phytoplankton photosynthesis to light, involving the development of new or improved measurement methods. Calculation procedures were developed to estimate how light controls primary productivity. He devised the widely used characteristic ‘ I k ’ to quantify the onset of light saturation in the curve that defines the response of photosynthesis to light quantity. Experiences in extremely productive African soda lakes stimulated an interest in the possibility of CO 2 being a limiting factor controlling phytoplankton productivity and, more generally, Jack had the ecological insight to recognize that ecological dynamics resulted from interactions among factors rather than a response to a single variable.

scholarly journals Rove beetles (Coleoptera: Staphylinidae) of a large pristine peat bog in Belarus Lake District

2018 ◽  
Vol 61 (2) ◽  
pp. 99-104
Author(s):  
Gennadi G. SUSHKO ◽  
Keyword(s):  
Species Richness ◽  
Abundant Species ◽  
The Other ◽  
Peat Bog ◽  
Lake District ◽  
Open Spaces ◽  
Rove Beetles ◽  
Moss Layer ◽  
High Species Richness ◽  
North Western

Species composition and diversity of the rove beetles were studied in main habitats of a large pristine peat bog in Belarus Lake District (North-Western Belarus). Very specific staphylinid assemblages were found. They were characterized by not high species richness and diversity. In these uneven assemblages, a very small number of species: Drusilla canaliculata (Fabricius, 1787), Philonthus cognatus Stephens, 1832, Staphylinus erythropterus Linnaeus, 1758, Ischnosoma splendidus (Gravenhorst, 1806) dominated, while the majority of recorded species were rare. Unlike other inhabitants of the moss layer among the highly abundant species of rove beetles, peat bog specialists were not found. The highest diversity and evenness had the rove beetles assemblages in open spaces. On the other hand, the differences in these assemblages were not high.

Electron Microscopy in the Study of Natural Phytoplankton Assemblages

1985 ◽  
Vol 43 ◽  
pp. 620-623
Author(s):  
Linda Sicko-Goad
Keyword(s):  
Electron Microscopy ◽  
Aquatic Environment ◽  
Size Range ◽  
Physical Parameters ◽  
Specific Information ◽  
Phytoplankton Assemblages ◽  
Phytoplankton Productivity ◽  
Ecosystem Effects ◽  
Time Of Year ◽  
Species Specific

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.

Drawing as a Creative Approach to Researching Extant Garments: A Case Study Involving John Ruskin's Clothing

Costume ◽  
2020 ◽  
Vol 54 (2) ◽  
pp. 202-221
Author(s):  
Ingrid Mida ◽  
Sarah Casey
Keyword(s):  
Research Tool ◽  
John Ruskin ◽  
Lake District ◽  
Curatorial Practice ◽  
Dress History ◽  
Absent Presence

Reading the clues embedded in extant clothing demands both imagination and patience since the subtle marks of wear, use and alteration may only become evident with extended observation and reflection. During the course of a project undertaken in conjunction with the bicentenary celebrations of John Ruskin's birth culminating in the exhibition of Sarah Casey's drawings in Ruskin's Good Looking! (8 February–7 April 2019), the authors studied the garments of John Ruskin at Brantwood, his former home in the Lake District. The life-sized drawings of these garments produced by Casey mapped the absent presence of the former wearer, allowed visitors the opportunity to better see and reflect on Ruskin's clothing, and also revealed the hidden histories of Ruskin's garments. Drawing, the making of marks with meaning, is not an obvious research tool in dress history and curatorial practice but, as this case study shows, can expose subtle details and reveal new insights.

Use of Ornamental Trees in Dating of Abandoned Cemeteries on the Example of Thuja Occidentalis and Thuja Orientalis

2012 ◽  
Vol 1 (1) ◽  
pp. 45-50
Author(s):  
Magdalena Opała ◽  
Leszek Majgier
Keyword(s):  
Climatic Conditions ◽  
The Other ◽  
Lake District ◽  
Thuja Occidentalis ◽  
North Eastern ◽  
The 1960S ◽  
Thuja Orientalis ◽  
Ornamental Trees ◽  
Common Tree ◽  
Local Habitat

Abstract Due to the lack of maintenance, abandoned cemeteries are often incorporated into the landscape. In many cases the information about the age of the cemetery is unavailable. To find out the approximate time of the formation of the cemetery the information recorded in the annual tree and shrub rings can be used. One of the most common tree species, planted for ornamental and symbolic purposes on the cemeteries, are Thuja orientalis and Thuja occidentalis. Alien to the Polish flora, these species adapted well to the local habitat and climatic conditions. The paper presents an attempt to apply dendrochronological dating to determine the age of the abandoned cemeteries in the region of the Great Masurian Lakes, part of the Masurian Lake District (north-eastern Poland). The study included five abandoned cemeteries. In total, 15 cores were taken from the trees. After applying the standard dendrochronological method, local chronologies for the studied species were established. The research indicated that the oldest found specimens - over 70 yrs old - are Thuja occidentalis individuals growing at the Słabowo cemetery. At the other sites the specimens of both Thuja species date back to the 1960s and early 1970s. Compared to the historical information regarding the age and origin of the studied objects, thujas growing there are much younger than the age of the cemeteries foundation. The presented method proved to be very helpful in understanding the time of Thuja occidentalis and Thuja orientalis introduction at the investigated cemeteries.

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