the larger benthic foraminifera gyroconulina columellifera schroeder & darmoian, 1977 (type-locality: maastrichtian aqra formation of iraq) is described for the first time from two sections of the maastrichtian tarbur formation of the zagros fold-thrust-belt, sw iran. new details on its wall microstructure are provided. the microfacies is represented by bioclastic wacke-/pack-/grainstones with ...

impacts of effluent from fish farming activities on fluvial ecosystems lead to deterioration of water quality and changes in the macroinvertebrates assemblage. in this study, the influence of fish farm effluents on water quality and macroinvertebrates communities of tajan river was investigated to evaluate the suitability of macroinvertebrates based on biological metrics and indices. benthic ma...

shahrechay dam is located at 12th km of shahrechay river in urmia. this study was conducted for a year (spring to fall, 2007) to identify different species of benthic organisms in the dam. considering the relevant topographic status like the local depth and water speed, 6 sampling stations were chosen and sampling was done in shallow locations of the river by means of superficial method. in thi...

Benthic primary producers in marine ecosystems may significantly alter biogeochemical cycling and microbial processes in their surrounding environment. To examine these interactions, we studied dissolved organic matter release by dominant benthic taxa and subsequent microbial remineralization in the lagoonal reefs of Moorea, French Polynesia. Rates of photosynthesis, respiration, and dissolved ...

19 The digestive organs in decapodiform cephalopod species morphologically vary by 20 individual lifestyle. We examined the following six species of adult decapodiformes 21 cephalopods representing different habitats: Todarodes pacificus, Loligo bleekeri, Loligo 22 edulis, Watasenia scintillans (pelagic), Sepia lycidas, and Euprymna morsei (benthic). L. 23 bleekeri and L. edulis possess a bursi...

we quantified the distribution, abundance and assemblage structure of macrofauna at 22 stations in gorgan bay, seasonally in 2012-2013. also, depth, temperature, salinity, do, tom and sediment particle size were measured in each station. the highest concentration of tom was measured near the western littoral zone (10.22) while the mouth part and north-eastern area was characterized by the lowes...

A large data set from the Eastern Mediterranean was analyzed to explore the relationship between seawater column variables and benthic community status. Our results showed a strong quantitative link between the seawater column variables (Chlorophyll a and Eutrophication Index) and various indicators describing benthic diversity and community composition. The percentage of benthic opportunistic ...

Linkages between benthic and pelagic habitats occur in both freshwater and marine systems across multiple spatial and temporal scales, and are influenced by a number of chemical, biological, and physical forces. We identified three major mechanisms of benthic-pelagic coupling: (1) organism movement, (2) trophic interactions, and (3) biogeochemical cycling. We also explore the implications of se...

Historically the importance of benthic primary production to the structure and function of lake ecosystems has been underestimated. With increasing recognition of the importance of benthic-pelagic linkages in lakes, researchers recently have demonstrated that benthic production can ‘subsidize’ pelagic food webs. These findings indicate that loss of benthic production may lead to a reduction in ...