A study off Concepción, central Chile, during the 1997/1998 El Niño (EN) revealed that the concentration of dissolved oxygen and the organic content and quality of the sediment control the vertical distribution of macrofauna in the sediment and bioturbation potential. The study area, characterized by organic-rich, silty sediments, lies within the most intense upwelling center off the coast of C...

Published data on production of natural populations of benthic organisms were used to derive allometric equations relating annual production per unit biomass (P: B ratio) to mean individual body mass (time and biomass weighted) in the population on which production was measured. Separate equations were derived for meiofauna and macrofauna. Since no published data on production and size-structur...

During the last decade, considerable efforts have been undertaken to achieve a “good ecological status” of European coastal waters and ensuring development methodological standards for evaluation this status. However, current routine biomonitoring implicates time-consuming costly manual sorting morphological identification benthic macrofauna. In our study, we tested performance environmental DN...

Two South Australian canyons, one shelf-incising (du Couedic) and one slope-limited (Bonney) were compared for macrofaunal patterns on the shelf and slope that spanned three water masses. It was hypothesized that community structure would (H1) significantly differ by water mass, (H2) show significant regional differences and (H3) differ significantly between interior and exterior of each canyon...

The aliphatic hydrocarbon composition of sediments from Ceuta harbour, North Africa, was studied to determine the sources, levels and effects of these hydrocarbons on macrofauna composition by considering indices and concentration ratios in multivariate analyses. A total of 21 stations (15 inside and 6 outside the harbour) were sampled using a van Veen grab. High hydrocarbon concentrations (496...

Forest management, including selection of appropriate tree species to mitigate climate change and sustain biodiversity, requires a better understanding factors that affect the composition soil fauna communities. These communities are an integral part ecosystem play essential role in forest functioning related carbon nitrogen cycling. Here, by performing field study across six common gardens Den...

Organic amendments may improve the quality of acidic tropical agricultural soils with low organic carbon contents under conventional management (mineral fertilization and irrigation) in Southeast Asia. We investigated effect biochar, compost their combination on maize growth yield, soil physical, biological chemical properties at harvesting time four sites three countries: Thailand, Vietnam Lao...

Macrofauna invertebrates of forest floors provide important functions in the decomposition process of soil organic matter, which is affected by the nutrient stoichiometry of the leaf litter. Climate change effects on forest ecosystems include warming and decreasing litter quality (e.g. higher C : nutrient ratios) induced by higher atmospheric CO(2) concentrations. While litter-bag experiments u...