Simulation study of the vegetation structure and function in eastern Siberian larch forests using the individual-based vegetation model SEIB-DGVM

2010 ◽  
Vol 259 (3) ◽  
pp. 301-311 ◽  
Author(s):  
Hisashi Sato ◽  
Hideki Kobayashi ◽  
Nicolas Delbart
2001 ◽  
Vol 43 (6) ◽  
pp. 135-135 ◽  
Author(s):  
J.-U. Kreft ◽  
J. W. Wimpenny

We have simulated a nitrifying biofilm with one ammonia and one nitrite oxidising species in order to elucidate the effect of various extracellular polymeric substance (EPS) production scenarios on biofilm structure and function. The individual-based model (IbM) BacSim simulates diffusion of all substrates on a two-dimensional lattice. Each bacterium is individually simulated as a sphere of given size in a continuous, three-dimensional space. EPS production kinetics was described by a growth rate dependent and an independent term (Luedeking-Piret equation). The structure of the biofilm was dramatically influenced by EPS production or capsule formation. EPS production decreased growth of producers and stimulated growth of non-producers because of the energy cost involved. For the same reason, EPS accumulation can fall as its rate of production increases. The patchiness and roughness of the biofilm decreased and the porosity increased due to EPS production. EPS density was maximal in the middle of the vertical profile. Introduction of binding forces between like cells increased clustering.


2007 ◽  
Vol 388 (7) ◽  
pp. 737-741 ◽  
Author(s):  
Rita Przybilski ◽  
Christian Hammann

AbstractThe hammerhead ribozyme is a small RNA endonuclease found in sub-viral plant pathogens, in transcripts from certain animal satellite DNAs and encoded at distinct loci ofArabidopsis thaliana. Kinetic analyses of tertiary stabilised ribozymes from peach latent mosaic viroid (PLMVd),Schistosoma mansoniandA. thalianarevealed a ten-fold difference in cleavage rates. Core nucleotide variations affected cleavage reactions least in theA. thalianaribozyme, and most in theS. mansoniribozyme. The reverse ligation reaction was catalysed efficiently by the PLMVd andA. thalianaribozymes. The different behaviour of the individual hammerhead ribozymes is discussed in terms of structure and function.


1972 ◽  
Vol 3 (4) ◽  
pp. 343-355 ◽  
Author(s):  
Max B. Clyne

Diagnosis is possible on a number of levels. Traditional, overall, and interrelationship types of diagnosis are differentiated. The effectiveness of the traditional diagnosis, which is used to indicate etiology of disease, to assess the effect of the disorder on structure and function, and to classify the illness, is questioned, since it usually leads to a general prognosis based on statistical probability rather than to a unique prognosis indicating specific predictions and treatments for the individual patient. The doctor, when making this kind of diagnosis, acts as an objective observer and assesses an abstract concept, the illness rather than a person, so that the traditional diagnosis is illness-centered. By including features of the patient's personality and his relationships with others, the overall diagnosis provides a more embracing overview of the individual's physical and emotional conditions. It has greater ongoing validity in description and of usefulness for treatment by centering upon the patient as an individual whose conflicts and sufferings are felt and understood. It may require lengthy interviewing, but this may be shortened in practice by focusing upon the particular aspect of the patient's world which seems central to the pathology. This focal area is often determined spontaneously through a “flash,” the mutual intuitive recognition of an important understanding between doctor and patient, leading to further diagnostic and therapeutic work. The flash establishes a climate of high emotional charge and involves both patient and doctor intrinsically in the diagnostic process and its outcome. It is one of the means by which an interrelationship diagnosis, centered on the doctor-patient relationship, may be arrived at. Truly successful treatment in general practice, and perhaps in most branches of medicine, is probably based on some form of interrelationship diagnosis, even though this diagnosis may not have been verbalized or properly conceptualized by the doctor. Case material illustrates the effectiveness of each type of diagnosis for the physician and for his patient.


2020 ◽  
pp. 3-14

The structure and function of the skin details the individual components of the epidermis, dermis, and their roles in normal skin health. The individual cell types in the epidermis, the different epidermal layers, and the roles of the keratinocyte are explained. The epidermis and dermis, and their important relation to each other through the dermoepidermal junction are described. The dermal adnexal structures of hair follicles (pilosebaceous units), sweat glands, and nerves are all considered. The functions of skin and barrier function are also listed. Rare but important causes of disordered sweating (hyperhidrosis and hypohidrosis) are described. In addition, presentations of hyperhidrosis are discussed.


2016 ◽  
Vol 127 (2-3) ◽  
pp. 339-351 ◽  
Author(s):  
Sean M. P. Cahoon ◽  
Patrick F. Sullivan ◽  
Cassandra Gamm ◽  
Jeffrey M. Welker ◽  
David Eissenstat ◽  
...  

2020 ◽  
Vol 35 (3) ◽  
pp. 761-778
Author(s):  
Monika H. Egerer ◽  
Benjamin Wagner ◽  
Brenda B. Lin ◽  
Dave Kendal ◽  
Kai Zhu

Abstract Context Land use change requires measuring shifting patterns in biodiversity at various spatial scales to inform landscape management. Assessing vegetation change at different scales is challenging in urban ecosystems managed by many individuals. Thus, we do not know much about the structure and function of green spaces that support biodiversity. Objective We aim to understand how vegetation structure and function indicators in urban community gardens vary with spatial scale, applying new and traditional methods in landscape ecology to inform future research and application. Methods We performed two methods to assess garden vegetation structure (height) and function (species diversity, cover) at the garden- and garden plot scale. First, we used traditional field sampling to estimate garden vegetation at the garden scale (1 m2 quadrats along transects) and at the plot scale (estimated within entire plot) to measure height, diversity and cover. Second, we used UAV aerial imagery to derive measures of garden and plot vegetation using canopy height models (CHMs). We evaluated differences in CHMs at each scale across the gardens, and compared field and UAV-derived measures. Results Garden vegetation characteristics vary with spatial scale. Plant species richness and vegetation cover, but not height, related to UAV-derived imagery. Conclusions New technologies paired with traditional field methods can together inform how vegetation structure and function vary with spatial scale in urban landscapes. Spatial scale is key to accurate and meaningful urban vegetation analyses. New and traditional methods in urban ecology research should develop together to improve and streamline their future application.


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