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Title
core samples
Title
Corer
Title
Hemigrapsus oregonensis
Title
Paraphoxus similis
Description
(1/10m^2)
Title
Characterization of microsatellite loci in the European green crab (Carcinus maenas),
Description
Carcinus maenas (Decapoda: Portunidae) has proven a highly successful invasive marine species whose potential economic and ecological impacts are of great concern worldwide. Here, we characterize 14 polymorphic microsatellite loci in C. maenas and its sister species Carcinus aestuarii. These markers will prove useful for fine-scale genetic analyses of native and introduced populations, for assessment of the sources and routes of invasion and for evaluation of post-invasion population dynamics. © 2006 Blackwell Publishing Ltd., Cited By (since 1996):14,
Invertebrates, CODEN: MENOC, ,
Author
Tepolt, Bagley, Geller, Blum
Date
2006-01-01T00:00:00Z
Title
Maera sp.
Description
Intertidal
Title
Acanthina angelica
Title
Kophobelemnon cf. affine
Description
Trawl F-1; sample 23/28
Title
Cobalt and copper distributions in the waters of Santa Monica Basin, California,
Description
The trace metals cobalt and copper are removed from the oceans interior by scavenging on to particle surfaces, but the mechanisms for removal of these two metals are probably quite different. Cobalt appears to be scavenged by manganese oxide particles, whereas organic compounds are the main carrier phase for copper. Remobilization of these metals in marine sediments therefore proceeds by different pathways. The differences in the pathways of remobilization are accentuated in oxygen-deficient environments: manganese oxide reduction is accelerated at low oxygen levels and organic carbon is preserved. Cobalt fluxes from sediments underlying oxygen-deficient waters should be enhanced and copper fluxes reduced. We report here measurements of the cobalt and copper distributions in the waters of an oxygen-deficient marine basin in the Southern California Bight. Cobalt concentrations near the bottom are raised four times above the background level, whereas copper concentrations show no increase. These measurements confirm features of existing models for the oceanic cycles of these metals., Cited By (since 1996):18,
Oceanography, CODEN: NATUA, ,
Author
Johnson, Stout, Berelson, Sakamoto-Arnold
Date
1988-01-01T00:00:00Z
Title
Temporal stability and origin of chemoclines in the deep hypersaline anoxic Urania basin
Description
Submarine brine lakes feature sharp and persistent concentration gradients between seawater and brine, though these should be smoothed out by free diffusion in open ocean settings. The anoxic Urania basin of the eastern Mediterranean contains an ultrasulfidic, hypersaline brine of Messinian origin above a thick layer of suspended sediments. With a dual modeling approach we reconstruct its contemporary stratification by geochemical solute transport fundamentals and show that thermal convection is required to maintain mixing in the brine and mud layer. The origin of the Urania basin stratification was dated to 1650 years B.P., which may be linked to a major earthquake in the region. The persistence of the chemoclines may be key to the development of diverse and specialized microbial communities. Ongoing thermal convection in the fluid mud layer may have important yet unresolved consequences for sedimentological and geochemical processes, also in similar environments. © 2015. American Geophysical Union. All Rights Reserved., Export Date: 19 February 2016, Article
Author
Goldhammer, Schwärzle, Aiello, Zabel
Date
2015-01-01T00:00:00Z
Title
Dendronotus albus
Description
O: Nudibranchia; SC: Opisthobranchia
Title
Mysella aleutica
Title
Mitrella permodesta
Title
Lecythorhynchus marginatus
Title
Disentangling the effects of fishing and environmental forcing on demographic variation in an exploited species
Description
Species targeted by fishing often recover in abundance and size within marine protected areas (MPAs) resulting in increased reproductive potential. However, in some situations, concomitant changes in the abundance of predators, competitors, or prey within MPAs, or strong gradients in the surrounding environmental seascape may counteract the purported benefits making it more difficult to predict how species will respond to protection. We used a network of MPAs in California, spanning a large temperature gradient, to investigate the drivers of demographic variability in the commercially important red sea urchin Mesocentrotus franciscanus. We investigated how demographic metrics varied geographically in response to protection, temperature, and the main sea urchin resource, the giant kelp Macrocystis pyrifera. We found significant conservation benefits to this fished sea urchin within MPAs designated six years prior to the beginning of this study. Within MPAs, red sea urchins were generally larger resulting in greater adult biomass density and reproductive biomass density. In addition, kelp density was an important explanatory variable of all red sea urchin demographic traits examined (adult size, gonadosomatic index [GSI], density, adult biomass density, and reproductive biomass density). Kelp density was positively correlated with red sea urchin GSI and adult size, but the relationships with density, adult biomass density, and reproductive biomass density were complex and the directionality changed depending on the region (or environmental setting) examined. Our results demonstrate that kelp, red sea urchin reproduction, and the effects of spatial management on demographic processes are tightly coupled with the oceanographic regime. © 2017 Elsevier Ltd
Author
Teck, Lorda, Shears, Bell, Cornejo-Donoso, Caselle, Hamilton, Gaines
Title
Cnidaria sp.
Description
Trawl F-1; sample 26/28; Sea pen -elongate axis
Title
Onchidoris bilamellata
Description
O: Nudibranchia; SC: Opisthobranchia
Title
Columbella auromexicana
Title
Clinocardium nuttallii
Description
O: Veneroida; SC: Heterodonta
Title
Chemical and biological interactions in the Rose Garden hydrothermal vent field, Galapagos spreading center,
Description
The concentrations of a suite of redox reactive chemicals were measured in the Rose Garden hydrothermal vent field of the Galapagos spreading center. Sulfide, silicate, oxygen and temperature distributions were measured in situ with a submersible chemical analyser. In addition, 15 chemical species were measured in discrete samples. Variability in the slope of the temperature-silicate plots indicates that heat is lost from these relatively low temperatures (<15°C) solutions by conduction to the solid phase. Consumption of oxygen, sulfide and nitrate from the hydrothermal solution as it flows past the vent animals is apparent from the distributions measured in situ and in the discrete samples. The fraction of sulfide and nitrate removed from the solution by consumption appears to have increased between 1979-1985. Sulfide and oxygen appear to be consumed under different conditions: sulfide is removed primarily from the warmest solutions, and oxygen is consumed only from the cold seawater. This separation may be driven primarily by the increased gradients of each chemical under these conditions. There is no evidence for the consumption of significant amounts of manganese(II) by the vent organisms. The analysis of other data sets from this vent field indicate no significant consumption of methane by the vent organisms, as well. © 1988., Cited By (since 1996):103,
Oceanography, ,
Author
Johnson, Childress, Hessler, Sakamoto-Arnold, Beehler
Date
1988-01-01T00:00:00Z
Title
Terebratulina kiiensis
Description
1/4m net
Title
Holothuroidea sp.
Description
Trawl II-8; sample 1/3; Holothurian -blue green
Title
Oenopota reticulata
Title
Syllidae sp.
Title
Paelopatides confundens
Description
Trawl II-7; sample 1/1
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