Results 1 to 10 of about 125,449 (211)

Nitrite regeneration in the oligotrophic Atlantic Ocean [PDF]

open access: yesBiogeosciences, 2022
The recycling of scarce nutrient resources in the sunlit open ocean is crucial to ecosystem function. Nitrification directs ammonium (NH4+) derived from organic matter decomposition towards the regeneration of nitrate (NO3-), an important resource for ...
D. R. Clark   +9 more
doaj   +1 more source

Sethʼs Unique Head Inspiration [PDF]

open access: yesمجلة کلية الآثار - جامعة القاهرة, 2023
There has been much debate over the years about the true nature of the animal god Seth the sacred that he enigmatic personality, and the reason for the controversy is the animal’s head that does not belong to a specific animal.
Heba Abd-El Monsef Nasef
doaj   +1 more source

Systeme zur mechanischen und mechanisch-chemischen Unkrautregulierung Winterraps (Brassica napus subsp. napus) - Versuche in Niedersachsen

open access: yesJulius-Kühn-Archiv, 2022
In Niedersachsen nimmt der Einsatz mechanischer Verfahren seit einigen Jahren zu. Die Unkrautregulierung im Ökolandbau ist mit reihenunabhängiger Technik wie dem Zinkenstriegel oder der Sternrollhacke ein gängiges Verfahren, da diese Technik auf den ...
Warnecke-Busch, Goßswinth   +1 more
doaj   +1 more source

Systeme zur Unkrautregulierung mit Hacke und Bandspritze in Zuckerrüben (Beta vulgaris subsp. vulgaris) - Versuche in Niedersachsen

open access: yesJulius-Kühn-Archiv, 2022
Eine Möglichkeit der Reduktion von Herbiziden im konventionellen Zuckerrübenanbau bietet die mechanische und mechanisch-chemische Unkrautregulierung mit Scharhacken in Verbindung mit einer Bandspritzeinrichtung.
Warnecke-Busch, Goßswinth
doaj   +1 more source

ERSEM 15.06: a generic model for marine biogeochemistry and the ecosystem dynamics of the lower trophic levels [PDF]

open access: yesGeoscientific Model Development, 2016
The European Regional Seas Ecosystem Model (ERSEM) is one of the most established ecosystem models for the lower trophic levels of the marine food web in the scientific literature.
M. Butenschön   +17 more
doaj   +1 more source

The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the northwest European shelf sea [PDF]

open access: yesBiogeosciences, 2014
The assimilation and regeneration of dissolved inorganic nitrogen, and the concentration of N2O, was investigated at stations located in the NW European shelf sea during June/July 2011. These observational measurements within the photic zone demonstrated
D. R. Clark   +4 more
doaj   +1 more source

Internal Waves at the UK Continental Shelf: Automatic Mapping Using the ENVISAT ASAR Sensor

open access: yesRemote Sensing, 2020
Oceanic internal waves occur within stratified water along the boundary between water layers of different density and are generated when strong tidal currents flow over seabed topography.
Andrey A. Kurekin   +2 more
doaj   +1 more source

The significance of nitrogen regeneration for new production within a filament of the Mauritanian upwelling system [PDF]

open access: yesBiogeosciences, 2016
The Lagrangian progression of a biological community was followed in a filament of the Mauritanian upwelling system, north-west Africa, during offshore advection.
D. R. Clark   +3 more
doaj   +1 more source

Evidence for the effects of decommissioning man-made structures on marine ecosystems globally: a systematic map protocol

open access: yesEnvironmental Evidence, 2021
Background Numerous man-made structures (MMS) have been installed in various parts of the ocean (e.g. oil and gas structures, offshore wind installations). Many are now at, or nearing, the end of their intended life.
Anaëlle J. Lemasson   +9 more
doaj   +1 more source

The assessment of a global marine ecosystem model on the basis of emergent properties and ecosystem function: a case study with ERSEM [PDF]

open access: yesGeoscientific Model Development, 2016
Ecosystem models are often assessed using quantitative metrics of absolute ecosystem state, but these model–data comparisons are disproportionately vulnerable to discrepancies in the location of important circulation features.
L. de Mora, M. Butenschön, J. I. Allen
doaj   +1 more source

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