ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Unknown

Seawater carbonate chemistry, calcification and dissolution of a coral reef in the northern Red Sea, 2007 (2007)

Silverman, Jacob ; Lazar, Boaz ; Erez, Jonathan

PANGAEA

In: Supplement to: Silverman, Jacob; Lazar, Boaz; Erez, Jonathan (2007): Effect of aragonite saturation, temperature, and nutrients on the community calcification rate of a coral reef. Journal of Geophysical Research: Oceans, 112, C05004, https://doi.org/10.1029/2006JC003770

add to mindlist on the mindlist

Details

Publication Date: 2024-03-15

Description: In this study we investigated the relations between community calcification of an entire coral reef in the northern Red Sea and annual changes in temperature, aragonite saturation and nutrient loading over a two year period. Summer (April-October) and winter (November-March) average calcification rates varied between 60 ± 20 and 30 ± 20 mmol·m-2·d-1, respectively. In general, calcification increased with temperature and aragonite saturation state of reef water with an apparent effect of nutrients, which is in agreement with most laboratory studies and in situ measurements of single coral growth rates. The calcification rates we measured in the reef correlated remarkably well with precipitation rates of inorganic aragonite calculated for the same temperature and degree of saturation ranges using empirical equations from the literature. This is a very significant finding considering that only a minute portion of reef calcification is inorganic. Hence, these relations could be used to predict the response of coral reefs to ocean acidification and warming.

Keywords: Alkalinity, total; Alkalinity anomaly technique (Smith and Key, 1975); Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calculated, see reference(s); Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Date; DEPTH, water; Dissolution rate; Dissolution rate, standard deviation; Entire community; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Evaporation, daily total; Field observation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); LATITUDE; LONGITUDE; Macro-nutrients; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH meter (Radiometer PHM 93); Red Sea; Residence time; Rocky-shore community; Salinity; Temperate; Temperature; Temperature, water; Titration potentiometric (Metler-Toledo)

Type: Dataset

Format: text/tab-separated-values, 360 data points

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

DATA PANGAEA

S·F·X

Fulltext

2

Electronic Resource

Vertical mixing and coral death in the Red Sea following the eruption of Mount Pinatubo (1995)

Genin, Amatzia ; Lazar, Boaz ; Brenner, Stephen

[s.l.] : Nature Publishing Group

Nature 377 (1995), S. 507-510

add to mindlist on the mindlist

Details

ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] The seasonal variability of air and sea-surface temperature in the Gulf of Eilat-a desert-bordered, 1,820-m-deep basin, 180 km long and 6-25 km wide-is shown in Fig. 1. As salinity varies little (40.3-40.8%o), vertical variations in water density are determined mainly by temperature2. ...

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1038/377507a0

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

3

Unknown

Resuspension by fish facilitates the transport and redistribution of coastal sediments (2014)

Katz, Timor ; Yahel, Gitai ; Reidenbach, Matthew A. ; [et al.]

Association for the Sciences of Limnology and Oceanography

add to mindlist on the mindlist

Details

Publication Date: 2022-05-26

Description: Author Posting. © Association for the Sciences of Limnology and Oceanography, 2012. This article is posted here by permission of Association for the Sciences of Limnology and Oceanography for personal use, not for redistribution. The definitive version was published in Limnology and Oceanography 57 (2012): 945-958, doi:10.4319/lo.2012.57.4.0945.

Description: Oxygen availability restricts groundfish to the oxygenated, shallow margins of Saanich Inlet, an intermittently anoxic fjord in British Columbia, Canada. New and previously reported 210Pb measurements in sediment cores compared with flux data from sediment traps indicate major focusing of sediments from the oxygenated margins to the anoxic basin seafloor. We present environmental and experimental evidence that groundfish activity in the margins is the major contributor to this focusing. Fine particles resuspended by groundfish are advected offshore by weak bottom currents, eventually settling in the anoxic basin. Transmittance and sediment trap data from the water column show that this transport process maintains an intermediate nepheloid layer (INL) in the center of the Inlet. This INL is located above the redox interface and is unrelated to water density shifts in the water column. We propose that this INL is shaped by the distribution of groundfish (as resuspension sources) along the slope and hence by oxygen availability to these fish. We support this conclusion with a conceptual model of the resuspension and offshore transport of sediment. This fish-induced transport mechanism for sediments is likely to enhance organic matter decomposition in oxygenated sediments and its sequestration in anoxic seafloors.

Description: The VENUS Project and University of Victoria supported the ship and submersible time for field experiments, and the U.S. Geological Survey and Coastal and Marine Geological Program generously supported J.C. The project was supported by Discovery Grants from the Natural Sciences and Engineering Research Council of Canada to V.T. and P.S. and a Yohay Ben-Nun fellowship and Moshe Shilo Center for Marine Biogeochemistry Fund award to T.K.

Repository Name: Woods Hole Open Access Server

Type: Article

Format: application/pdf

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

PAPER (OA)

S·F·X

Fulltext

4

Unknown

Particle triggered reactions as an important mechanism of alkalinity and inorganic carbon removal in river plumes (2021)

Wurgaft, Eyal ; Wang, Zhaohui Aleck ; Churchill, James H. ; [et al.]

American Geophysical Union

add to mindlist on the mindlist

Details

Publication Date: 2022-10-20

Description: Author Posting. © American Geophysical Union, 2021. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 48(11), (2021): e2021GL093178, https://doi.org/10.1029/2021GL093178.

Description: The effects of heterogeneous reactions between river-borne particles and the carbonate system were studied in the plumes of the Mississippi and Brazos rivers. Measurements within these plumes revealed significant removal of dissolved inorganic carbon (DIC) and total alkalinity (TA). After accounting for all known DIC and TA sinks and sources, heterogeneous reactions (i.e., heterogeneous CaCO3 precipitation and cation exchange between adsorbed and dissolved ions) were found to be responsible for a significant fraction of DIC and TA removal, exceeding 10% and 90%, respectively, in the Mississippi and Brazos plume waters. This finding was corroborated by laboratory experiments, in which the seeding of seawater with the riverine particles induced the removal of the DIC and TA. The combined results demonstrate that heterogeneous reactions may represent an important controlling mechanism of the seawater carbonate system in particle-rich coastal areas and may significantly impact the coastal carbon cycle.

Description: This research was funded by the National Science Foundation (NSF) and the Bi-National Science Foundation U.S-Israel award number OCE-BSF 1635388.

Description: 2021-11-20

Keywords: Calcium carbonate ; Carbon cycle ; Carbonate chemistry ; Heterogeneous reactions ; Mississippi ; River mouths

Repository Name: Woods Hole Open Access Server

Type: Article

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

PAPER (OA)

S·F·X

Fulltext

5

Unknown

Constraining evaporation rates based on large-scale sea surface transects of salinity or isotopic compositions (2019)

Berman, Hadar ; Paldor, Nathan ; Churchill, James H. ; [et al.]

American Geophysical Union

add to mindlist on the mindlist

Details

Publication Date: 2022-10-26

Description: Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research-Oceans 124(2), (2019): 1322-1330, doi:10.1029/2018JC014106.

Description: A Lagrangian model is constructed for a surface column of initial height h(0) that propagates at an average speed u and is subject to excess (i.e., net) evaporation of q m/year. It is shown that these parameters combine to form an evaporation length, L = uh(0)/q, which provides an estimate for the distance the column must travel before evaporating completely. While these changes in the surface water level due to evaporation are compensated by entrainment of water into the overall column, the changes in either near‐surface salinity or isotopic compositions are retained and can be measured. Observations of surface salinity and isotopic compositions of δ18O and δD along 1,000‐ to 3,500‐km long transects are used to estimate values of L in the Red Sea, Mediterranean Sea, Indian Ocean, and Gulf Stream. The variations of salinity, δ18O and δD in all four basins are linear. As anticipated, the estimated value of L is smallest in the slowly moving and arid Red Sea and is greatest in the fast‐moving Gulf Stream.

Description: The salinity and δ18O data collected aboard the Indian Ocean cruise described in Srivastava et al. (2007) can be accessed at this website (https://www.nodc.noaa.gov). The salinity, δ18O and δD data collected during the Red Sea cruise of the Interuniversity Institute for Marine Sciences, Eilat, described in Steiner et al. (2014) and can be accessed in the supporting information section of doi: 10.1073/pnas.1414323111. H. B. acknowledges the support provided by the Eshkol Foundation of the Israel Ministry of Science.

Description: 2019-07-26

Keywords: Air-sea interaction ; Evaporation ; Semienclosed basins ; Salinity ; Stable isotopes ; Thermohaline circulation

Repository Name: Woods Hole Open Access Server

Type: Article

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

PAPER (OA)

S·F·X

Fulltext

6

Unknown

Groundfish overfishing, diatom decline, and the marine silica cycle : lessons from Saanich Inlet, Canada, and the Baltic Sea cod crash (2010)

Katz, Timor ; Yahel, Gitai ; Yahel, Ruthy ; [et al.]

American Geophysical Union

add to mindlist on the mindlist

Details

Publication Date: 2022-05-26

Description: Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 23 (2009): GB4032, doi:10.1029/2008GB003416.

Description: In this study, we link groundfish activity to the marine silica cycle and suggest that the drastic mid-1980s crash of the Baltic Sea cod (Gadus morhua) population triggered a cascade of events leading to decrease in dissolved silica (DSi) and diatom abundance in the water. We suggest that this seemingly unrelated sequence of events was caused by a marked decline in sediment resuspension associated with reduced groundfish activity resulting from the cod crash. In a study in Saanich Inlet, British Columbia, Canada, we discovered that, by resuspending bottom sediments, groundfish triple DSi fluxes from the sediments and reduce silica accumulation therein. Using these findings and the available oceanographic and environmental data from the Baltic Sea, we estimate that overfishing and recruitment failure of Baltic cod reduced by 20% the DSi supply from bottom sediments to the surface water leading to a decline in the diatom population in the Baltic Sea. The major importance of the marginal ocean in the marine silica cycle and the associated high population density of groundfish suggest that groundfish play a major role in the silica cycle. We postulate that dwindling groundfish populations caused by anthropogenic perturbations, e.g., overfishing and bottom water anoxia, may cause shifts in marine phytoplankton communities.

Description: We acknowledge the VENUS Project, University of Victoria, for supporting the ship and submersible time for field experiments and USGS, CMGP, for support to J.C. Additional funding from NSERC Canada and from the Canada Research Chairs Foundation to V.T.; a Rothschild fellowship to G.Y.; and a Yohay Ben-Nun fellowship and Moshe Shilo Center for Marine Biogeochemistry fund to T.K. are also acknowledged.

Keywords: Marine silica cycle ; Groundfish activity ; Sediments resuspension ; Overfishing ; Baltic Sea ; Saanich Inlet

Repository Name: Woods Hole Open Access Server

Type: Article

Format: application/pdf

Format: video/avi

Format: text/plain

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

PAPER (OA)

S·F·X

Fulltext

7

Unknown

Basin-scale estimates of pelagic and coral reef calcification in the Red Sea and Western Indian Ocean (2014)

Steiner, Zvi ; Erez, Jonathan ; Shemesh, Aldo ; [et al.]

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences of the United States of America. 2014; 111(46): 16303-16308. Published 2014 Nov 03. doi: 10.1073/pnas.1414323111.

add to mindlist on the mindlist

Details

Publication Date: 2014-11-03

Print ISSN: 0027-8424

Electronic ISSN: 1091-6490

Topics: Biology , Medicine , Natural Sciences in General

Published by National Academy of Sciences

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

PAPER CURRENT

S·F·X

Fulltext

8

Unknown

Freshwater on the route of hominids out of Africa revealed by U-Th in Red Sea corals (2011)

Lazar, Boaz ; Stein, Mordechai

Geological Society of America (GSA)

In: Geology 39: 1067-1070.

add to mindlist on the mindlist

Details

Publication Date: 2011-11-01

Description: A fundamental issue in the evolution of human culture concerns the route and conditions of anatomically modern hominids during the migration out of Africa. A particular question is, how could anatomically modern hominids cross the hyperarid Arabian deserts? Here we outline the evidence for significant presence of freshwater along the Red Sea shores during the last interglacial period. Freshwater caused an extensive recrystallization of coral reefs from aragonite to calcite, indicating uplift of the reefs through well-developed phreatic freshwater coastal aquifers. Applying novel open-system U-Th dating methodology to the calcitic corals, we dated the freshwater recrystallization to ca. 140 ka, consistent with other geological lines of evidence placing the migration of anatomically modern hominids out of Africa at the onset of the last interglacial.

Print ISSN: 0091-7613

Electronic ISSN: 1943-2682

Topics: Geosciences