PURPOSE to examine the combined effect of cohabitation status and social participation, respectively, and socioeconomic position on onset of mobility limitations in a prospective study among older Danes. DESIGN AND METHODS logistic regression analyses with combined exposure variables were performed in a study population of 2,839 older men and women from the Danish Intervention Study on Preven...

Geothermal conditions are extremely favourable in Hungary. Thermal water is accessible in 70% of the territory of the country, with a lowest temperature of 30°C. For energetic purposes, it can be utilized in two different ways: for supplying heat or generating electricity. In relation to utilization, one of the most serious problems derives from the chemical composition of thermal water. The pr...

Microbial respiration depends on microclimatic variables and carbon (C) substrate availability, all of which are altered when ecosystems experience major disturbance. Widespread tree mortality, currently affecting piñon–juniper ecosystems in southwestern North America, may affect C substrate availability in several ways, for example, via litterfall pulses and loss of root exudation. To determin...

Moisture may limit microbial activity in a wide range of environments including salt water, food, wood, biofilms, and soils. Low water availability can inhibit microbial activity by lowering intracellular water potential and thus reducing hydration and activity of enzymes. In solid matrices, low water content may also reduce microbial activity by restricting substrate supply. As pores within so...

Abundance, growth rates and nutrient limitation of the heterotrophic bacteria present in the reef water column and reef cavity water were measured on a fringing reef at Curaçao (Netherlands Antilles). Bacterial in situ growth rates were measured using dialysis bags. Nutrient limitation was measured using bioassays with different amendments of inorganic nutrients (nitrate, ammonium, phosphate) a...

Citation: Lusebrink I, Erbilgin N and Evenden ML (2016) The Effect of Water Limitation on Volatile Emission, Tree Defense Response, and Brood Success of Dendroctonus ponderosae in Two Pine Hosts, Lodgepole, and Jack Pine. Front. Ecol. Evol. 4:2. doi: 10.3389/fevo.2016.00002 The Effect of Water Limitation on Volatile Emission, Tree Defense Response, and Brood Success of Dendroctonus ponderosae i...

OBJECTIVES To understand how caring for grandchildren affects the physical and mental health of grandparents in Taiwan. METHOD Grandparents aged 50 and older from 4 waves of the Taiwan Longitudinal Study on Aging (1993-2003, n = 3,711) were divided into 7 categories based on living arrangement and caregiving history. Generalized estimation equations controlling for sociodemographic characteri...

Resource limitation theory regarding water versus nutrient limitation predicts on the one hand that, because of uptake trade-offs, increases in water will increase limitation by nutrients; on the other hand, because of supply interactions, increases in water will lead to correlated increases in nutrient availability. Using root ingrowth into resource-enriched soil cores as an assay of resource ...