The natural abundance of 13C and 15N was measured in basidiocarps of at least 115 species
in 88 genera of ectomycorrhizal, wood-decomposing and litter-decomposing fungi from …

There are many problems related to overgrowth of aquatic macrophytes in many lakes and
rivers throughout the world; for instance, the harvesting costs in Lake Biwa have been …

Abstract Changes in the characteristics of dissolved organic matter (DOM: the dissolved
fraction of natural organic matter) during a series of wastewater treatment plant (WWTP) …

Carbon and nitrogen stable isotope ratios (δ 13 C and δ 15 N) have been used for more than
two decades in analyses of food web structure. The utility of isotope ratio measurements is …

Measurement of nitrogen isotopic composition (δ 15 N) of plants and soil nitrogen might
allow the characteristics of N transformation in an ecosystem to be detected. We tested the …

A new type of high-performance liquid chromatography (HPLC)–size exclusion chromatography
(SEC) system with ultraviolet (UV) absorbance detection and non-dispersive infrared (…

The oxygenated hypolimnion accounts for a volumetrically significant part of the global
freshwater systems. Previous studies have proposed the presence of hypolimnion-specific …

To evaluate the effects of forest type and stand age on forest N dynamics, we investigated the
leaf-litter quality and soil N mineralization in four pairs of young and middle-aged forests in …

Variation in stable nitrogen isotope ratios (δ 15 N) was assessed for plants comprising two
wetland communities, a bog-fen system and a flood plain, in central Japan. δ 15 N of 12 …

Differences in biogenic phosphorus (P) compounds between sediment and suspended
particles in aquatic environments are important for understanding the mechanisms of internal P …