Temat: benthic organism - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Total benthic oxygen uptake in two Arctic fjords (Spitsbergen) with different hydrological regimes
Autorzy:: Kotwicki, L.
Grzelak, K.
Opalinski, K.
Weslawski, J.M.
Powiązania:: https://bibliotekanauki.pl/articles/48291.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: oxygen uptake
Arctic fjord
Spitsbergen
hydrological regime
organic matter
biomass
marine sediment
benthic organism
Źródło:: Oceanologia; 2018, 60, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Greenland whales and walruses in the Svalbard food web before and after exploitation
Autorzy:: Weslawski, J.M.
Hacquebord, L.
Stempniewicz, L.
Malinga, M.
Powiązania:: https://bibliotekanauki.pl/articles/47767.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Balaena mysticetus
food web
plankton
walrus
whale
Arctic
coastal ecosystem
Svalbard Archipelago
sea mammal
Odobaenus rosmarus rosmarus
exploitation
benthic organism
Greenland whale
Opis:: Between 1600 and 1900 two numerous and ecologically important large marine mammals were extirpated in the Svalbard archipelago. These were the pelagic-feeding Greenland whale (Balaena mysticetus) and the benthic-feeding walrus (Odobaenus rosmarus rosmarus), the initial stocks of which prior to exploitation are estimated to have numbered approximately 46 000 and 25 000 animals respectively. Their annual food consumption at that time is estimated to have been some 4 million tons of plankton and 0.4 million tons of benthic organisms. Assuming that the primary and secondary production of the shelf/coastal ecosystem in the 16th century (before the peak of the Little Ice Age) was similar to that of the present day, the authors have concluded that a major shift in the food web must have occurred after the Greenland whales and walruses were eliminated. Planktonivorous seabirds and polar cod (Boreogadus saida) very probably took advantage of the extirpation of the Greenland whales, while eiders (Somateria mollissima) and bearded seals (Erignathus barbatus) benefited from the walrus's extinction. In turn, the increased amount of pelagic fish provided food for piscivorous alcids and gulls, and may have given rise to the huge present-day seabird colonies on Svalbard.
Źródło:: Oceanologia; 2000, 42, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Epibenthic diversity and productivity on a heavily trawled Barents Sea bank (Tromsoflaket)
Autorzy:: Kedra, M.
Renaud, P.E.
Andrade, H.
Powiązania:: https://bibliotekanauki.pl/articles/49128.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: epibenthic diversity
Barents Sea
ecosystem
benthic community
secondary production
epifaunal organism
sponge
trawled area
Opis:: Shallow Arctic banks have been observed to harbour rich communities of epifaunal organisms, but have not been well-studied with respect to composition or function due to sampling challenges. In order to determine how these banks function in the Barents Sea ecosystem, we used a combination of video and trawl/dredge sampling at several locations on a heavily trawled bank, Tromsøflaket — located at the southwestern entrance to the Barents Sea. We describe components of the benthic community, and calculate secondary production of dominant epifaunal organisms. Forty-six epibenthic taxa were identified, and sponges were a significant part of the surveyed benthic communities. There were differences in diversity and production among areas, mainly related to the intensity of trawling activities. Gamma was the most diverse and productive area, with highest species abundance and biomass. Trawled areas had considerably lower species numbers, and significant differences in epifaunal abundance and biomass were found between all trawled and untrawled areas. Trawling seems to have an impact on the sponge communities: mean individual poriferan biomass was higher in untrawled areas, and, although poriferans were observed in areas subjected to more intensive trawling, they were at least five times less frequent than in untrawled areas.
Źródło:: Oceanologia; 2017, 59, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki