In the year 1974, Larry Pomeroy first proposed that microbes were true movers of energy and nutrients in marine food webs (Pomeroy, 1974). This idea was later formalized as the “microbial loop” (Azam et al., 1983; Pomeroy et al., this issue) in which energy and carbon lost from the planktonic food web in the form of dissolved organic matter (DOM) was recovered and repackaged by heterotrophic ba...

objective: soil organic carbon has been the most important soil quality measurement factors and has intense relation with soil physical, chemical and biological characteristics. organic matter and its components are important factors of soil aggregates constitution and stability and play significant role in its structure. so, this research has been done for achieving this purpose. methods: this...

In the process of water distribution, secondary pollution drinking cannot be ignored. There are many organic substances in supply network, some which exist a dissolved state as matter (DOM), and adsorbed on particulate to form (POM). With flow water, particles will brought into end user, threaten life health user. this study, two forms distributed were comprehensively analyzed through micro-fil...

Aggregates consist in many cases of microorganisms attached to an organic matrix. Several attempts have been made to visualise the mucoid components of the matrix by staining (e.g. alcian blue for carbohydrates and coomassie brilliant blue for proteins). Modern equipment, such as epfluorescence microscopes, flow cytometers and confocal laser scanning n?icroscopes, requires or works best with fl...

Stable isotope ratios of carbon (delta13C) and nitrogen (delta15N) were used to investigate feeding patterns of larval and early juvenile pelagic fishes in slope waters of the Gulf of Mexico. Contribution of organic matter supplied to fishes and trophic position within this pelagic food web was estimated in 2007 and 2008 by comparing dietary signatures of the two main producers in this ecosyste...

Cold-water corals (CWC) are frequently reported from deep sites with locally accelerated currents that enhance seabed food particle supply. Moreover, zooplankton likely account for ecologically important prey items, but their contribution to CWC diet remains unquantified. We investigated the benthic food web structure of the recently discovered Santa Maria di Leuca (SML) CWC province (300 to 11...

The hybridization of polyoxometalates (POMs) through an organic-inorganic association offers several processing advantages in the design of heterogeneous catalysts. A clear understanding of the organization of these hybrid materials on solid surfaces is necessary to optimise their properties. Herein, we report for the first time the organization of Keggin phosphotungstic [PW12O40](3-) and Wells...

The landscapes colonized by invasive earthworms in the eastern U.S. are often patchworks of forest stands in various stages of successional development. We established six field sites in tulip poplar dominated forests in the Smithsonian Environmental Research Center in Edgewater, MD, that span mid (50–70 years-three plots) and late (120– 150 years-three plots) successional stages where younger ...

[1] We measured dN signatures of macrophytes and particulate organic matter (POM) in six estuaries and three freshwater ponds of Massachusetts to assess whether the signatures could be used as indicators of the magnitude of land-derived nitrogen loads, concentration of dissolved inorganic nitrogen in the water column, and percentage of N loads contributed by wastewater disposal. The study focus...