نتایج جستجو برای: vertical communities
تعداد نتایج: 226072 فیلتر نتایج به سال:
To identify preoperative factors which influence the effectiveness of strabismus surgery in adults, we retrospectively reviewed the records of 179 patients > 15 years old (131 with exotropia, 48 with esotropia) who had had combined recession and resection surgery for correction of horizontal strabismus. Eighteen preoperative variables were evaluated; those with significant influence on the surg...
Vertical distribution of free–living nematodes from the tropical region are still poorly documented, especially in Vietnam. Field sampling was conducted at Ba Lai river, a tributary Mekong to insight into regularity vertical pattern nematode assemblages. Furthermore, some sediment environmental characteristics such as greenhouse gases were also detected order understand how influence distributi...
Meromictic lakes are useful biogeochemical models because of their stratified chemical gradients and separation of redox reactions down the water column. Perennially ice-covered meromictic lakes are particularly stable, with long term constancy in their density profiles. Here we sampled Lake A, a deep meromictic lake at latitude 83°N in High Arctic Canada. Sampling was before (May) and after (A...
Abstract. Narzullayev SB. 2022. New data on the vertical distribution of nematode communities in mountain ecosystems Mount Zarafshan, Uzbekistan. Biodiversitas 23: 3967-3975. (Mount Uzbekistan) is first study variation species and ecological groups Central Asia depending altitude gradients. The study's primary purpose was to fauna perennial plants highlands reveal formation nematodes following ...
We present a mathematical model for a phytoplankton-zooplankton system, based on a predator-prey scheme. The model considers the effects of sinking in the phytoplankton, vertical mixing and attenuation of photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) in the water column. In a first approach, the model was studied under conditions of average PAR irradiance and shows f...
Coral reefs are globally important marine ecosystems as sites of high biotic diversity. Reef flat sediments are reasonably homogeneous in composition. This substratum is subject to gradients in water motion, grazing pressure and benthic productivity. This study used DNA fingerprinting techniques, automated rRNA intergenic spacer analysis (ARISA), and terminal restriction fragment length polymor...
Biological methanogenesis is linked to permanent water logged systems, e.g., rice field soils or lake sediments. In these systems the methanogenic community as well as the pathway of methane formation are well-described. By contrast, the methanogenic potential of river sediments is so far not well-investigated. Therefore, we analyzed (a) the methanogenic potential (incubation experiments), (b) ...
BACKGROUND The correct establishment of the human gut microbiota represents a crucial development that commences at birth. Different hypotheses propose that the infant gut microbiota is derived from, among other sources, the mother's fecal/vaginal microbiota and human milk. RESULTS The composition of bifidobacterial communities of 25 mother-infant pairs was investigated based on an internal t...
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