scispace - formally typeset
Search or ask a question
Institution

Woods Hole Oceanographic Institution

NonprofitFalmouth, Massachusetts, United States
About: Woods Hole Oceanographic Institution is a nonprofit organization based out in Falmouth, Massachusetts, United States. It is known for research contribution in the topics: Population & Mantle (geology). The organization has 5685 authors who have published 18396 publications receiving 1202050 citations. The organization is also known as: WHOI.


Papers
More filters
Journal ArticleDOI
TL;DR: Bach et al. as discussed by the authors proposed that low-fluid-flux serpentinization of olivine to serpentine and ferroan brucite is followed by later stages of serpentinisation under more open-system conditions and formation of magnetite by the breakdown of ferro-an Brucite.
Abstract: [1] The results of detailed textural, mineral chemical, and petrophysical studies shed new light on the poorly constrained fluid-rock reaction pathways during retrograde serpentinization at mid-ocean ridges. Uniformly depleted harzburgites and dunites from the Mid-Atlantic Ridge at 15� N show variable extents of static serpentinization. They reveal a simple sequence of reactions: serpentinization of olivine and development of a typical mesh texture with serpentine-brucite mesh rims, followed by replacement of olivine mesh centers by serpentine and brucite. The serpentine mesh rims on relic olivine are devoid of magnetite. Conversely, domains in the rock that are completely serpentinized show abundant magnetite. We propose that low-fluid-flux serpentinization of olivine to serpentine and ferroan brucite is followed by later stages of serpentinization under more open-system conditions and formation of magnetite by the breakdown of ferroan brucite. Modeling of this sequence of reactions can account for covariations in magnetic susceptibility and grain density of the rocks. Citation: Bach, W., H. Paulick, C. J. Garrido, B. Ildefonse, W. P. Meurer, and S. E. Humphris (2006), Unraveling the sequence of serpentinization reactions: petrography, mineral chemistry, and petrophysics of serpentinites from MAR 15� N (ODP Leg 209, Site 1274), Geophys. Res. Lett., 33, L13306,

358 citations

Journal ArticleDOI
TL;DR: Hinrichs et al. as mentioned in this paper showed that the methane-consuming archaebacteria in marine sediments are involved in the anaerobic oxidation of methane in sediments from the Eel River Basin, offshore northern California, and further studies of those same sediments and of samples from a methane seep in the Santa Barbara Basin have confirmed and extended those results.

358 citations

Journal ArticleDOI
TL;DR: Waterborne nutrients enter the Great Sippewissctt Marsh through groundwater, rain, and tidal flooding as discussed by the authors, and the amount of waterborne nutrients entering the marsh provides primarily ammonium, nitrate, nitrite, dissolved organic (don) and particulate (PN) nitrogen, particulate carbon (PC), and phosphate.
Abstract: Waterborne nutrients enter Great Sippewissctt Marsh through groundwater, rain, and tidal flooding. The ebb of tidal water removes nutrients. During summer, uptake by marsh biota leads to net import of nutrients. The increased export of ammonium in August may be due to leaching from senescent marsh plants. There is a net annual export of ammonium, nitrate, nitrite, dissolved organic (DON) and particulate (PN) nitrogen, particulate carbon (PC), and phosphate. Ammonium, DON, and PN are the major forms of nitrogen exported. Nutrient concentrations in coastal and marsh water are correlated, and marsh exports could contribute substantially to nutrient supplies of coastal waters. Groundwater entering the marsh provides primarily N03-N and DON. Nutrient inputs through precipitation consist primarily of DON, NO,-N, and NIIcN. Particulate materials in rain have a high C:N ratio, contributing little to enrichment of the nitrogen-limited salt marsh. Groundwater carries over 20 times the amount of nutrients brought in by rain. The nitrogen provided by both sources is more than enough to support annual plant growth. Inputs of nitrogen by groundwater are therefore important to the nitrogen economy of a salt marsh. About half the dissolved inorganic nitrogen brought into the marsh by groundwater is converted to and exported as PN. The marsh thus transforms the nitrogen that would have been used by primary producers into a form suitable for consumers such as shellfish. Large amounts of apparently refractory DON enter the marsh in groundwater and similar amounts are exported by tides. PC exported to coastal water is equivalent to 40% of the net annual production of Spartina alterniflora, the dominant marsh plant.

357 citations

Journal ArticleDOI
TL;DR: In this article, a video system suspended from a tethered airship was used to observe subsurface responses of focal dolphins as boats under their control, operating at specified speeds, were directed near dolphins.
Abstract: Coastal cetaceans are subject to potential injury or disturbance from vessels. In Sarasota, Florida, where about 120 resident bottlenose dolphins, Tursiops truncatus, share the inshore waters with over 34,000 registered boats, disturbance potential is high. We assessed specific behavioral responses of individual dolphins to boat traffic. We conducted focal animal behavioral observations during opportunistic and experimental boat approaches involving 33 well-known identifiable individual bottlenose dolphins. Dolphins had longer interbreath intervals (IBI) during boat approaches compared to control periods (no boats within 100 m). Treatment IBI length was inversely correlated with distance to the nearest boat in opportunistic observations. During 58 experimental approaches to 18 individuals, a video system suspended from a tethered airship was used to observe subsurface responses of focal dolphins as boats under our control, operating at specified speeds, were directed near dolphins. Dolphins decreased interanimal distance, changed heading, and increased swimming speed significantly more often in response to an approaching vessel than during control periods. Probability of change for both interanimal distance and heading increased when dolphins were approached while in shallow water. Our findings provide additional support for the need to consider disturbance in management plans for cetacean conservation.

357 citations


Authors

Showing all 5752 results

NameH-indexPapersCitations
Roberto Romero1511516108321
Jerry M. Melillo13438368894
Timothy J. Mitchison13340466418
Xiaoou Tang13255394555
Jillian F. Banfield12756260687
Matthew Jones125116196909
Rodolfo R. Llinás12038652828
Ronald D. Vale11734249020
Scott C. Doney11140659218
Alan G. Marshall107106046904
Peter K. Smith10785549174
Donald E. Canfield10529843270
Edward F. DeLong10226242794
Eric A. Davidson10128145511
Gary G. Borisy10124838195
Network Information
Related Institutions (5)
Scripps Institution of Oceanography
7.8K papers, 487.4K citations

97% related

Alfred Wegener Institute for Polar and Marine Research
10.7K papers, 499.6K citations

94% related

Lamont–Doherty Earth Observatory
8K papers, 504.5K citations

93% related

IFREMER
12.3K papers, 468.8K citations

91% related

National Oceanic and Atmospheric Administration
30.1K papers, 1.5M citations

90% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202357
2022126
2021712
2020701
2019737
2018612