A three-dimensional/high-resolution transport model for persistent organic pollutants (POPs) has been developed to investigate the dynamics of POPs in the East China Sea. The POPs model includes four compartments: POPs in air, water, phytoplankton, and detritus. Biochemical processes considered in this study are diffusive air-water exchange, phytoplankton uptake of POPs, vertical sinking of phy...

1. Larvae of Pseudochironomus richardsoni were reared to pupation in individual enclosures, in one of three thermal habitats in a northern California stream. The average temperature range in cold seeps was 15–21 °C, while the main channel ranged from 20 to 27 °C, and side pools ranged from 18 to 33 °C. Diet consisted of either diatoms or algal detritus. 2. Specific growth rate ranged from 0.057...

BACKGROUND Coarse and fine woody debris are substantial forest ecosystem carbon stocks; however, there is a lack of understanding how these detrital carbon stocks vary across forested landscapes. Because forest woody detritus production and decay rates may partially depend on climatic conditions, the accumulation of coarse and fine woody debris carbon stocks in forests may be correlated with cl...

-Habitat selection in the darkling beetle Eleodes hispilabris Say (Coleoptera: Tenebrionidae) on the shortgrass prairie of the central United States was nonrandom at both a broad (km2) and a fine (cm2) scale, relative to the abundance of broadly defined habitat types and, within these, microhabitats. On a broad habitat scale, darkling beetles were more numerous and had longer residence times (a...

Recent advances in the ecology of food webs underscore the importance of detritus and indirect predator-prey effects. However, most research considers detritus as an invariable pool and predation as the only interaction between carnivores and prey. Carrion consumption, scavenging, is a type of detrital feeding that should have widespread consequences for the structure and stability of food webs...

Models of detritus-based ecosystems with delay have received a great deal of attention for the last few decades. This paper deals with the dynamical analysis of a nonlinear model of a detritus-based ecosystem involving detritivores and predator of detritivores. We have obtained the criteria for local stability of various equilibrium points and persistence of the model system. Next, we have intr...

Although climate warming has been widely demonstrated to induce shifts in the timing of many biological events, the phenological consequences of other prominent global change drivers remain largely unknown. Here, we investigated the effects of biological invasions on the seasonality of leaf litter decomposition, a crucial freshwater ecosystem function. Decomposition rates were quantified in 18 ...

Pentacyclic triterpenol methyl ethers (PTMEs), germanicol methyl ether (miliacin), 3-methoxyfern-9(11)-ene (arundoin), beta-amyrin methyl ether (iso-sawamilletin), and 3-methoxytaraxer-14-ene (sawamilletin or crusgallin) were characterized in surface sediments of the Cross-River system using gas chromatography-mass spectrometry (GC-MS). Triterpenol esters (mainly alpha- and beta-amyrinyl acetat...