Nematode community structure along elevation gradient in high altitude vegetation cover of Gangotri National Park (Uttarakhand), India.

The study was undertaken to understand the dynamics of soil nematode communities association along elevation gradient and associated variables in high-altitude regions of Western Himalaya. The diversity and distribution pattern of soil nematodes were investigated at four elevation ranges (Elv1, Elv2, Elv3, and Elv4 each of 500 m class) along altitudinal gradient (3000-5000 m). The nematode community comprised 58 genera of which 37 genera showed sensitivity towards altitudinal variation and the community structure also varied among elevation classes. It was found that elevation significantly affect the nematodes trophic group, diversity composition, and the nematode indices. Nematode generic richness and evenness index indicated a relatively low biodiversity of soil nematodes is supported at higher altitudes. Moreover, maturity indices reflected lower sustenance of k-strategic nematodes at higher elevations. Structure index depicted fewer connections in the soil food web at higher elevations. Nematode faunal profile showed low nutrient and low disturbance in the region. Carbon footprint of the whole nematode assemblage declined along the elevation. Overall substantial differences in the nematode composition, abundance, trophic structure, and contribution to belowground carbon cycling were observed with change in elevation. These findings could be utilized as useful tool in the long-term monitoring and to understand the region's soil health.

Altitudinal gradient affect abundance, diversity and metabolic footprint of soil nematodes in Banihal-Pass of Pir-Panjal mountain range.

Despite enormous diversity, abundance and their role in ecosystem processes, little is known about how community structures of soil-inhabiting nematodes differ across elevation gradient. For this, soil nematode communities were investigated along an elevation gradient of 1000-2500 masl across a temperate vegetation in Banihal-Pass of Pir-Panjal mountain range. We aimed to determine how the elevation gradient affect the nematode community structure, diversity and contribution to belowground carbon assimilation in the form of metabolic footprint. Our results showed that total nematode abundance and the abundance of different trophic groups (fungivores, herbivores and omnivores) declined with the increase of elevation. Shannon index, generic richness and evenness index indicated that nematode communities were more diverse at lower elevations and declined significantly with increase in elevation. Nematode community showed a pattern of decline in overall metabolic footprint with the increase of elevation. Nematode abundance and diversity proved to be more sensitive to elevation induced changes as more abundant and diverse nematode assemblage are supported at lower elevations. Overall it appears nematode abundance, diversity and contribution to belowground carbon cycling is stronger at lower elevations and gradually keep declining towards higher elevations under temperate vegetation cover in Banihal-pass of Pir-Panjal mountain range.

Prevalence of symptoms and risk of sleep apnea in Dubai, UAE.

PURPOSE: The United Arab Emirates (UAE) ranks 18th on the 2007 Forbes list of fattest countries with 68.3% of its citizens with an unhealthy weight and it is well known that weight gain and obesity are important determinants in the progression of obstructive sleep apnea syndrome (OSAS). The purpose of this study is to estimate the prevalence of symptoms and risk of OSAS in the primary health care setting in Dubai, and the relationship between obesity and sleep apnea. METHODS: In this prospective survey, a trained medical nurse administered the Berlin Questionnaire to a consecutive random sample of patients in the age group older than 14 years, who attended the primary health care center in Dubai Health Authority, Dubai, UAE, from September 2011 to March 2012. Based on the questionnaire answers, individuals were classified into high risk and low risk groups for OSAS. RESULTS: Based on the responses and measurement of the Berlin Questionnaire of 1214 subjects studied, 58% (n = 704) of the respondents were female, while 42% (n = 510) were male. Two-hundred-fifty-four respondents met the criteria for the high risk scoring. This gives a prevalence rate of 20.9% (out of which 22.9% of the male respondents were high risk for OSAS, while 19.5% of the females were high risk for OSAS), while the remainder of the participants were classified as low risk. The overall mean age of the high risk for OSAS female respondents was 39.95 years (standard deviation [SD] 11.73 years) and was 41.18 years (SD 14.95 years) for male respondents The highest prevalence was observed between age 51 to 60 in both genders. Seventy percent of the high risk group had a body mass index (BMI) ≥ 30 kg/m(2) and nearly 75% of the low risk group had a BMI < 30 kg/m(2), and the mean BMI was 32.06 kg/m(2) (SD 5.67 kg/m(2)) for males and 33.59 kg/m(2) (SD 6.44 kg/m(2)) for females. CONCLUSION: In the primary health care setting, the prevalence of symptoms of OSAS among adult UAE citizens is very high, and UAE patients are at risk for OSAS and may benefit from proper evaluation for OSAS.