scholarly journals Sinking export of particulate organic material from the euphotic zone in the eastern Beaufort Sea

2010 ◽  
Vol 410 ◽  
pp. 55-70 ◽  
Author(s):  
T Juul-Pedersen ◽  
C Michel ◽  
M Gosselin
Keyword(s):  
Organic Material ◽  
Euphotic Zone ◽  
Beaufort Sea

Responses by benthic organisms to inputs of organic material to the ocean floor: a review

1990 ◽  
Vol 331 (1616) ◽  
pp. 119-138 ◽  
Keyword(s):  
Organic Material ◽  
Euphotic Zone ◽  
Ocean Floor ◽  
Sediment Surface ◽  
Benthic Organisms ◽  
Faecal Pellets ◽  
Reproductive Cycles ◽  
Benthic Ecosystems ◽  
Deposit Feeding ◽  
Northeastern Atlantic

Most of the photosynthetically produced organic material reaching the ocean-floor is transported as settling particles, among which larger particles such as faecal pellets and macroaggregates (marine snow) are particularly important. Recent studies in the northeastern Atlantic have demonstrated that macroaggregates originating from the euphotic zone settle at a rate of approximately 100-150 m d -1 to form a deposit (phytodetritus) on the sediment surface. Bacteria and protozoa (flagellates and foraminifers) rapidly colonize and multiply on phytodetritus, while large deposit feeding animals ingest it. Other inputs, for example Sargassum , wood and vertebrate carcasses, also evoke a rapid response by benthic organisms. However, the taxa that respond depend on the form of the organic material. The intermittent or seasonally pulsed nature of phytodetritus and many other inputs regulate the population dynamics and reproductive cycles of some responding species. These are often opportunists that are able to utilize ephemeral food resources and, therefore, undergo rapid fluctuations in population density. In addition, the patchy distribution of much of the organic material deposited on the ocean-floor probably plays a major role in structuring deep-sea benthic ecosystems.

scholarly journals Downward particle flux and carbon export in the Beaufort Sea, Arctic Ocean; the Malina experiment

2015 ◽  
Vol 12 (2) ◽  
pp. 1247-1283
Author(s):  
J.-C. Miquel ◽  
B. Gasser ◽  
J. Martín ◽  
C. Marec ◽  
M. Babin ◽  
...  
Keyword(s):  
Carbon Flux ◽  
Zooplankton Community ◽  
Late Summer ◽  
Euphotic Zone ◽  
Beaufort Sea ◽  
Total Carbon ◽  
The Arctic ◽  
Surface Zone ◽  
Calanoid Copepods ◽  
Faecal Pellets

Abstract. As part of the international, multidisciplinary project Malina, downward particle fluxes were investigated by means of a drifting multi-sediment trap mooring deployed at three sites in the Canadian Beaufort Sea in late summer 2009. Mooring deployments lasted for 28–50 h and targeted the shelf-break and the slope along the Beaufort–Mackenzie continental margin, as well as the edge between the Mackenzie Shelf and the Amundsen Gulf. Besides analyses of C and N, the collected material was investigated for pigments, phyto- and microzooplankton, faecal pellets and swimmers. The measured fluxes were relatively low, in the range of 11–54 mg m−2 d−1 for the total mass, 1–15 mg C m−2 d−1 for organic carbon and 0.2–2.5 mg N m−2 d−1 for nitrogen. Comparison with a long-term trap dataset from the same sampling area showed that the short-term measurements were at the lower end of the high variability characterizing a rather high flux regime during the study period. The sinking material consisted of aggregates and particles that were characterized by the presence of hetero- and autotrophic microzooplankters and diatoms and by the corresponding pigment signatures. Faecal pellets contribution to sinking carbon flux was important, especially at depth where they represented up to 25% of the total carbon flux. The vertical distribution of different morphotypes of pellets showed a marked pattern with cylindrical faeces (produced by calanoid copepods) present mainly within the euphotic zone, whereas elliptical pellets (produced mainly by smaller copepods) were more abundant at mesopelagic depths. These features, together with the density of matter within the pellets, highlighted the role of the zooplankton community in the transformation of carbon issued from the primary production and the transition of that carbon from the productive surface zone to the Arctic Ocean's interior. Our data indicate that sinking carbon flux in this late summer period is primarily the result of a heterotrophic driven ecosystem as compared to the system driven by autotrophy earlier in the year.

Biological treatment for removal of organic material and ammonium from leachate at low temperatures

1999 ◽  
Vol 17 (6) ◽  
pp. 487-492
Author(s):  
Rittia H. Kettunen ◽  
Pertti Keskitalo ◽  
Taina H. Hoilijoki ◽  
Jukka A. Rintala
Keyword(s):  
Organic Material ◽  
Low Temperatures ◽  
Biological Treatment

Pengolahan Limbah Domba Menjadi Bokashi di Desa Arjowilangun, Kecamatan Kalipare Kabupaten Malang

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Moch Agus Choiron ◽  
Siti Azizah ◽  
Nafisah Arina Hidayati
Keyword(s):  
Waste Management ◽  
Organic Material ◽  
Fermentation Process ◽  
Agricultural Waste ◽  
Previous Discussion ◽  
Post Test ◽  
Village People ◽  
Pathogenic Microbes

Arjowilangun Village is a post-TKI village. People choose to become sheep farmers with less capital than being cattle farmers. Based on the previous discussion, waste management is required to ensure the sustainability of environment in Arjowilangun Village. Processing sheep and agricultural waste program is held by Doktor Mengabdi team. Farmers can learn how to make Bokashi from waste. The method used is composting aerobic or anaerobic starters for composting organic material. A decomposer as collection of several good microbes from fungi work to control pathogenic microbes assists the fermentation process. Based on the results of the pre-test and post-test during the training, it can be showed that understanding of the breeders' potential of the environment is increased.

LBA-ECO CD-02 CARBON, NITROGEN, OXYGEN STABLE ISOTOPES IN ORGANIC MATERIAL, BRAZIL

2010 ◽  
Author(s):  
J. BERRY, ◽  
C. COOK, ◽  
T.F. DOMINGUES, ◽  
J. EHLERINGER, ◽  
L. FLANAGAN, ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Organic Material ◽  
Oxygen Stable Isotopes

PERFORMANCE INVESTIGATION OF FULLY VERTICAL ORGANIC MATERIAL BASED MULTI-LAYER OLEDs

2018 ◽  
Vol 5 (4) ◽  
pp. 23
Author(s):  
SRIVASTAVA ANSHIKA ◽  
KUMAR BRIJESH ◽  
◽  
Keyword(s):  
Organic Material

BAHAN ORGANIK TERLARUT DALAM AIR LAUT

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Arif Dwi Santoso
Keyword(s):  
Ocean Circulation ◽  
Cation Distribution ◽  
Organic Material ◽  
Sea Water ◽  
Biological Processes ◽  
Subsequent Regeneration

Seawater contains high amounts of organic material and ions causing high salinity.The distribution of nutrients in the ocean is determined by ocean circulation, biological processes of uptake and mineralization, and subsequent regeneration of nutrients by migration of animals and by supply from the land.Topic related to sea water is important to discuss and to be a challenging with many researchers in Indonesia. In this paper, organic mater from sea water was learned in detail. The information contained of formulation history, justifi cation, distribution, advantages, and method of measure, type and effect to environment.Keywords: organic material, sea water, dissolved

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