نتایج جستجو برای: pelagic

تعداد نتایج: 5978  

2016
Gunnar Jakobs Matthias Labrenz Gregor Rehder Susanna Hietanen Katrin Kießlich Angela Vogts Martin Blumenberg Oliver Schmale

Citation: Jakobs G, Labrenz M, Rehder G, Hietanen S, Kießlich K, Vogts A, Blumenberg M and Schmale O (2016) A Bioreactor Approach to Investigate the Linkage between Methane Oxidation and Nitrate/Nitrite Reduction in the Pelagic Oxic-Anoxic Transition Zone of the Central Baltic Sea. Front. Mar. Sci. 3:145. doi: 10.3389/fmars.2016.00145 A Bioreactor Approach to Investigate the Linkage between Met...

2007
S. Arndt

A transient, vertically resolved, analytical model for the early diagenesis of silica has been developed to quantify the importance of benthic-pelagic coupling in estuarine biogeochemical silica cycling. A sensitivity analysis based on Monte-Carlo simulations is carried out to assess the intensity and timing of benthic diffusive fluxes in response to a pelagic diatom bloom. The diffusive flux d...

2004
Bruce H. Robison

The deep pelagic habitat is a vast volume of cold, dark water where food is scarce and bioluminescence is the principal source of light and communication. Understanding the adaptations that allow animals to successfully inhabit this daunting realm has been a difficult challenge because investigators have had to conduct their work remotely. Research in the deep water column is going through an e...

Journal: :Molecular phylogenetics and evolution 2018
Jose Tavera Arturo Acero P Peter C Wainwright

We present a phylogenetic analysis with divergence time estimates, and an ecomorphological assessment of the role of the benthic-to-pelagic axis of diversification in the history of haemulid fishes. Phylogenetic analyses were performed on 97 grunt species based on sequence data collected from seven loci. Divergence time estimation indicates that Haemulidae originated during the mid Eocene (54.7...

2006
John Sibert Robert J. Olson Jock W. Young

CONTENTS CLIOTOP/PFRP Workshop: The Role of Squid in Pelagic Marine Ecosystems ............................... 2 Papua New Guinea Tuna-Tagging Project ................. 5 Upcoming Events .................................................. 5 Erratum ................................................................ 7 Pelagic Fisheries Science in the Pacific, 2005 and Beyond—PIFSC and PFRP ............

2016
Tetsuji Onoue Honami Sato Daisuke Yamashita Minoru Ikehara Kazutaka Yasukawa Koichiro Fujinaga Yasuhiro Kato Atsushi Matsuoka

Extinctions within major pelagic groups (e.g., radiolarians and conodonts) occurred in a stepwise fashion during the last 15 Myr of the Triassic. Although a marked decline in the diversity of pelagic faunas began at the end of the middle Norian, the cause of the middle Norian extinction is uncertain. Here we show a possible link between the end-middle Norian radiolarian extinction and a bolide ...

2007
Halvor Knutsen Esben Moland Olsen Lorenzo Ciannelli Sigurd Heiberg Espeland Jan Atle Knutsen Jan Henrik Simonsen Stig Skreslet Nils Chr. Stenseth

Coastal marine species with pelagic egg and larval stages, such as the Atlantic cod Gadus morhua, can be structured into genetically distinct local populations on a surprisingly small geographic scale considering their dispersal potential. Mechanisms responsible for such small-scale genetic structure may involve homing of adults to their natal spawning grounds, but also local retention of pelag...

2006
Braddock K. Linsley

Pliocene and Pleistocene sediments from Sulu Sea ODP Sites 768 and 769 contain high-resolution records of pelagic sedimentation in a deep marine silled basin. Carbonate analyses reveal that both sites are free of pelagic carbonate up until 2.4 Ma, at which time carbonate becomes a major component of the pelagic marl sedimentation. The timing of this increase in calcium carbonate accumulation is...

1999
L. Legendre F. Rassoulzadegan J. Michaud

A new approach is described to identify the dominant process (physical versus biological) in a pelagic marine ecosystem, from simple biological oceanographic field variables. The approach is based on quantification of the matching (M) between phytoplankton production (P) and losses, from field estimates of chlorophyll a (Chl) and P. Coefficient M is estimated for a wide range of oceanic and coa...

2016
Heather A. Cronin Jonathan H. Cohen Jørgen Berge Geir Johnsen Mark A. Moline

Bioluminescence commonly influences pelagic trophic interactions at mesopelagic depths. Here we characterize a vertical gradient in structure of a generally low species diversity bioluminescent community at shallower epipelagic depths during the polar night period in a high Arctic fjord with in situ bathyphotometric sampling. Bioluminescence potential of the community increased with depth to a ...

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