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Gitai Yahel, PhD | Marine Ecology
Yahel@Ruppin.ac.il
| W. +972 (9) 8304 110 | H. +972 (77) 7800 637 |Skype/Google Chat: gitaiyahel

Research interests
Publication list
  In preparation
  Reports
 


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The School of Marine Sciences
Ruppin Academic Center,
Mikhmoret
40297 Israel

UVic
Biology department
University of Victoria
BC, Canada

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Research Interests

I'm interested in the diverse processes that link the seafloor to the overlying ocean. These processes range from feeding mechanisms of individual suspension feeders such as sponges and bivalves through the behavior pattern of ground fish and migratory zooplankton to the interplay between hydrodynamics and the benthos (organisms that inhabits the bottom of the sea). Fieldwork and the development of new methods for underwater studies are major themes in my work.

Current research:

Nutritional ecology of suspension feeders
Capturing particles suspended in the water is a unique feeding strategy for aquatic animals. My studies focus on measuring the metabolism, diet composition, feeding preferences, and feeding rates of marine suspension feeders. I am particularly interested in developing underwater (in situ) methods which facilitate the study of undisturbed animals in their natural environment. Read more...

Sediment resuspension by fish
Benthic (ground) fish resuspend large amount of sediments while foraging and seeking for shelter. We discovered that fish activity alone could maintain a layer of turbid water near the bottom (nepheloid benthic layer), enhance the transport of nutrients and benthic oxygen demand, and considerably reduce organic carbon sequestration. Currently, we are developing tools that will allows us to quantify these processes and understand their effects in different marine habitats. 
Read more...

Benthic-pelagic coupling

Benthic organisms are dependent on hydrodynamics and other processes at the water column for every aspect of their life history. In many cases, the activity of benthic communities can also control water column processes. We are using a variety of methods to quantify these process in the field. Read more...


 List of publications ISI Citation Report - March 2013

24.Katz, T., Yahel G., Reidenbach M. A., Tunnicliffe V., Herut B., Crusius J., Whitney F., Snelgrove P., and Lazar B. (2012)
Resuspension by fish facilitates the transport and redistribution of coastal sediments
Limnol. Oceanogr. 57(4) 945-958 Journal | Abstract | PDF

23. Ribes, M., Jiménez  E., Yahel G., López-Sendino P., Diez B., Massana, R., Sharp J.H., and Coma R. (2012)
Functional convergence of microbes associated with temperate marine sponges
Environmental Microbiology 14,1224-1239 Journal | AbstractPDF

22. Leys, S.P., Yahel G., Reidenbach M. A. , Tunnicliffe V., Shavit U., and Reiswig H. M. (2012)
The sponge pump: the role of current induced flow in the design of the sponge body plan
PLOS ONE 6(12): e27787. doi:10.1371/journal.pone.0027787 Journal | Abstract | PDF

21. Chu J.W.F., Maldonado M., Yahel G., Leys S.P. (2011)

Glass sponge reefs as a silicon sink
Mar. Ecol. Prog. Ser. 411, 1-14 (feature article) Journal | Abstract | PDF

20. Katz, T., Yahel G., Yahel R., Tunnicliffe V., Herut B. , Snelgrove P., Crusius J., and Lazar B. (2009)

Groundfish overfishing, diatom decline, and the marine silica cycle: Lessons from Saanich Inlet, Canada, and the Baltic Sea cod crash
Global Biogeochem. Cycles, 23, GB4032, doi:10.1029/2008GB003416 Journal | Abstract | PDF+SM | Supplementary video

19. Yahel G., Peter G. Beninger, Marie D., and Genin A. (2009)
In situ size-independent retention of phytoplankton and bacteria by the tropical bivalve Lithophaga simplex
Aquat. Biol. 6, 235-246 Journal | Abstract | PDF

18. Genin A, Monismith S.G, Reidenbach M.A., Yahel G., and Koseff J.R. (2009)
Intense benthic grazing of phytoplankton by the coral reef community
Limnol. Oceanogr. 54, 938–951 Journal | Abstract | PDF

17. Yahel G.,  Yahel R., Katz T., Lazar B., Herut B., and Tunnicliffe V. (2008)
Fish activity, a major mechanism for sediment resuspension and organic matter remineralization in coastal marine sediments Mar. Ecol. Prog. Ser. 372, 195-209  Journal | Abstract | PDF | Supplementary video

16. Yahel G., Whitney F., Reiswig H.M., Eerkes-Medrano D.I., and Leys S.P. (2007)
In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible
Limnol. Oceanogr. 52,428-440  Journal | Abstract | PDFSOM

15. Yahel G., Eerkes-Medrano D.I., and Leys S.P. (2006)
Size independent selective filtration of ultraplankton by hexactinellid glass sponges
Aquatic Microbial Ecology 45:181-194  Journal | Abstract | PDF

14. Reidenbach, M.A., Monismith S.G., Koseff J.R., Yahel G., and Genin A. (2006)
Boundary layer turbulence and flow structure over a fringing coral reef
Limnol. Oceanogr. 51: 1956-1968  Journal | Abstract | PDF

13. Monismith S.G., Genin A., Reidenbach, M.A., Yahel G., and Koseff J.R. (2006)
Thermally driven exchanges between a coral reef and the adjoining ocean
Journal of Physical Oceanography  Journal | Abstract | PDF

12. Yahel G., Zalogin T., Yahel R., and Genin A. (2005)
Phytoplankton grazing by epi- and in-fauna inhabiting exposed rocks in coral reefs.
Coral Reefs.   Journal | Abstract | PDF

11. Perkol-Finkel S., Shashar N., Barneah O., Ben-David-Zaslow R., Oren U., Reichart T., Yacobovich T., Yahel G., Yahel R., and Benayahu Y. (2005)
Fouling reefal communities on artificial reefs: Does age matter? 
Biofouling 21, 127-140.  Journal | Abstract | PDF

10. Yahel G., Marie D., and Genin A. (2005)
"InEx” – an in situ method to measure rates of element intake and excretion by active suspension feeders
Limnol. Oceanogr. Met. 3, 46-58.  Journal | Abstract | PDF

9. Yahel R., Yahel G., and Genin A. (2005)
Diel pattern with abrupt crepuscular changes of zooplankton over a coral reef
Limnol. Oceanogr. 50, 930-944.  Journal | Abstract | PDF

8. Yahel R., Yahel G., and Genin A. (2005)
Near-bottom depletion of zooplankton over coral reefs: I. Diurnal dynamics and size  distribution
Coral Reefs 24: 75-85  Journal | Abstract | PDF

7. Yahel G., Sharp J.H., Marie D., Häse C., and Genin A. (2003)
In situ feeding and element removal in the coral-reef sponge Theonella swinhoei: Bulk DOC is the major source for carbon
Limnol. Oceanogr. 48 141-149.  Journal | Abstract | PDF

6. Yahel R., Yahel G., and Genin A. (2002)
Daily Cycles of Suspended Sand at Coral Reefs: A Biological Control
Limnol. Oceanogr. 47: 1071-1083.  Journal | Abstract | PDF

5. Genin A., Yahel G., Reidenbach M.A., Monismith S.G., Koseff J.R. (2002)
Intense benthic grazing on phytoplankton in coral reefs revealed using the control volume approach
Oceanography 15, 90-96.  Journal | Abstract | PDF

4. Yahel G., Post A.F., Fabricius K.E., Marie D., Vaulot D., and Genin A. (1998)
Phytoplankton distribution and grazing near coral reefs 
Limnol. Oceanogr. 43, 551-563.  Journal | Abstract | PDF

3. Fabricius K.E., Yahel G., and Genin A. (1998)
In situ depletion of phytoplankton by an azooxanthellate soft coral
Limnol. Oceanogr. 43, 354-356.  Journal | Abstract | PDF

 2. Yahel G. (1998)
Suspension feeding in coral reefs - what about dissolved matter?
Isr. J. Zool. 44, 90-91.  Text (abstract)

1. Fabricius K., Benayahu Y., Yahel G., Genin A. (1996)
Herbivory in Soft Corals: Correction.
Science 273, 293b-297.  Journal | Abstract



Submitted




In preparation
1. Jiménez E., Ribes M., and Yahel G.
Reassessing the nitrogen budget of Mediterranean sponges and methodology reevaluation comparison
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Email for manuscript

2.
Katz T. , Yahel G, Tunnicliffe T., Herut B., Crusius J. , Whitney F., Snelgrove P.V.R. , and Lazar B.
Fish activity balances the silica cycle in a north pacific fjord
 
Email for manuscript

Reports and other publication

1. Environmental Impacts of air-gun surveys on Glass Sponges
PI: Tunnicliffe V. and Chapman R. | Draft prepared by Yahel G. and Wilmut M.

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