Results 21 to 30 of about 99,932 (356)
Changes in invertebrate assemblage composition in benthic and hyporheic zones during a severe supraseasonal drought [PDF]
, 2014 Droughts are unpredictable disturbances characterized in streams by declining flow, reduced habitat availability, and deteriorating abiotic conditions.
Boulton, AJ +3 more
core +2 more sources
Faunal response to benthic and hyporheic sedimentation varies with direction of vertical hydrological exchange [PDF]
, 2014 1. Sedimentation and clogging of benthic and hyporheic zone substrates is increasingly being recognised as one of the greatest threats to the ecological integrity of riverine ecosystems globally. This ex-situ study examined the influence of sedimentation
Bo +58 more
core +2 more sources
Benthic phosphorus cycling in the Peruvian oxygen minimum zone [PDF]
Biogeosciences, 2015 Abstract. Oxygen minimum zones (OMZs) that impinge on continental margins favor the release of phosphorus (P) from the sediments to the water column, enhancing primary productivity and the maintenance or expansion of low-oxygen waters. A comprehensive field program in the Peruvian OMZ was undertaken to identify the sources of benthic P at six stations,
U. Lomnitz +6 more
openaire +4 more sources
Frontiers in Marine Science, 2020 Coastal seas are highly productive systems, providing an array of ecosystem services to humankind, such as processing of nutrient effluents from land and climate regulation.
Eva Ehrnsten +11 more
doaj +1 more source
Paleoecology of the Maastrichtian and Danian sediment at North of Central Alborz, Iran, based on Planktonic foraminifera [PDF]
, 2010 In order to study the fossil contents of the Ziarat-kola section for biostratigraphical purposes the 212 meters was sampled at Central Alborz. The sequence is mainly made up of monotonous grey- green to light grey marl.
Behnaz Balmaki
core +2 more sources
Benthic iron and phosphorus fluxes across the Peruvian oxygen minimum zone [PDF]
Limnology and Oceanography, 2012 Benthic fluxes of dissolved ferrous iron (Fe2+) and phosphate (TPO4) were quantified by in situ benthic chamber incubations and pore‐water profiles along a depth transect (11°S, 80‐1000 m) across the Peruvian oxygen minimum zone (OMZ). Bottom‐water O2 levels were < 2 µmol L−1 down to 500‐m water depth, and increased to ∼ 40 µmol L−1 at 1000 m.
Noffke, Anna +7 more
openaire +2 more sources
Fishes, 2022 The littoral zones around archipelagos are highly productive coastal habitats that serve as biodiversity hotspots and provide valuable ecosystem services that are different from those of the pelagic and profundal zones.
Yongsong Zhao +5 more
doaj +1 more source
The role of benthic foraminifera in the benthic nitrogen cycle of the Peruvian oxygen minimum zone [PDF]
Biogeosciences, 2012 Abstract. The discovery that foraminifera are able to use nitrate instead of oxygen as energy source for their metabolism has challenged our understanding of nitrogen cycling in the ocean. It was evident before that only prokaryotes and fungi are able to denitrify.
N. Glock +5 more
openaire +4 more sources
Biodiversity, community structure and function of biofilms in stream ecosystems [PDF]
, 2015 Multi-species, surface-attached biofilms often dominate microbial life in streams and rivers, where they contribute substantially to biogeochemical processes.
Besemer, Katharina
core +1 more source
Physio-Géo, 2019 In a close future, Mediterranean rivers will support strong disturbances due to climate changes, with inexorable consequences for their fauna. The invertebrate biodiversity of the Cèze River (South of France) was studied in a karstic area.
Pierre Marmonier +6 more
doaj +1 more source