Gidon Winters Ph.D

Gidon Winters Ph.D

Research Area: 

ResearchGate ResearchGate 
google scholar Google Scholar

Following a B.Sc in Biology and a teacher’s certificate in science education, I continued to a M.Sc. on photophysiology of corals in the department for plant sciences in Tel Aviv University. Following my graduation I spent nearly a year working in the lab of Prof. Roberto Iglesias-Preito in Puerto Morelos in Mexico on coral bleaching. I returned to Israel for my Ph.D. work during which I developed methods for physiological monitoring of coral stress. I continued to do a post doc in Germany where I worked on thermal stress of Zostera marina, a temperate seagrass species. Seagrass are a group of flowering plants (angiosperms) that returned to the marine environment some 60-70 million years ago. These plants have important ecological services and are considered as key stone species in shallow coastal environments.

I returned to Israel in 2011 to the Arava where I head the central Arava branch of the Dead Sea Arava Science Center (ADSSC). Although we are situated in the middle of the desert I continue to work on the effects of climate change on seagrasses using a dedicated seagrass mesocosm facility. In this facility (Figure 1) we can manipulate water temperatures and CO2 levels which allow us to perform multiple stress experiments related to climate change. 

Figure 1: The dedicated seagrass mesocosm facility.

Realizing that little is known about seagrass communities in the Gulf of Eilat in the Red Sea, we have recently initiated efforts directed at creating a GIS layer of seagrasses in the northern Gulf of Eilat (example in Figure 2) and following seasonal changes in their depth and geographical distributions. 

Figure 2: Example of the GIS layer showing the geographical and depth distrubtion of Halophila stipulacea in the northern tip of the Gulf of Eilat.

We are looking at changes in biomass, pigment composition and the organisms associated with the meadows at two different sites. We were also part of a first time article in Hebrew that explained about seagrasses.

In addition to my work in the marine environment, I also lead several studies involving Acacia trees, something much closer geographically to the central Arava location.

 Like seagrasses that are considered key stone species in the shallow coastal areas, Acacia trees are considered key stone species in arid regions where they improve soil conditions for other plants and provide shelter and food for many desert animals. Indeed it is due to these services that loss of acacia trees entails not only loss of the biota associated with acacia trees themselves but also enhances soil erosion.

Realizing the importance of acacia trees to the region, I have recently initiated and organized two acacia international conferences (Oct 2011, Oct 2015) called: Acacia in the Arava – past, present and future. 2011 Conference, 2013 Conference

Currently we are studying the population genetics of Acacia tortillis from both sides of the arava (Israel and Jordan), work based on de novo microsatellites that we have recently developed (Winters et al. 2013). Understanding the genetic structure of acacia populations in the region could contribute to a more effective management of acacia trees in the Negev and the Arava. We are involved in monitoring the physiology (using PAM fluoromtery, dendrometers, NIR photography – amongst other techniques) of acacia trees in the region and in experiments looking at the ecophysiological responses of different acacia species and populations to water stress (Figure 3). Additional efforts are underway to try and estimate the biomass and age of acacia trees in the area.

Figure 3: Dendrometer measuring changes in tree trunk diameter of Acacia radianna. Shown is also our acacia outdoor common stress garden set up.

Current research: 
  • Understanding the genetic population structure of Acacia tortillis (work by Yael Rodger for a M.Sc. thesis, together with Dr. Shrili Bar-David).
  • Acacia trees along the Arava : ecophysiological responses of different species and populations to water stress (work by Tali Rodkov for a M.Sc. thesis, together with Dr. Shimon Rachmilevitch).
  • Studying the effects of climate change on the physiology and gene expression in Halophila stipulacea, a tropical seagrass species common to the northern red sea.
  • Developing a GIS-based tool to protect seagrasses in the Gulf of Aqaba – mapping their
  • distribution, ecosystem services and potential threats (together with Dr. Gil Rilov and Sigal Abramovich).
Selected Publications: 
  • Hung Manh Nguyen, Periklis Kleitou, Demetris Kletou, Yuval Sapir and Gidon Winters (2018) Differences in flowering sex ratios between native and invasive populations of the seagrass Halophila stipulacea Botanica Marina x(x): xxx–xxx 
  • Oscar Michelle A., Barak Simon, Winters Gidon (2018) The Tropical Invasive Seagrass, Halophila stipulacea, Has a Superior Ability to Tolerate Dynamic Changes in Salinity Levels Compared to Its Freshwater Relative, Vallisneria americana Frontiers in Plant Science 9:950. DOI:10.3389/fpls.2018.00950. 
  • Yael S. Rodger, Gili Greenbaum, Shirli Bar-David, Gidon Winters (2018). Detecting hierarchical levels of connectivity in a population of Acacia tortilis trees at the northern edge of their global distribution using network analysis. PLoS ONE 13(4):e0194901. 
  • Hoai Tran T., Mayzlish-Gati E., Eshel A., Winters G. (2018). Germination, physiological and biochemical responses of acacia seedlings (Acacia raddiana and Acacia tortilis) to petroleum contaminated soils. Environmental Pollution 234: 642-655. 
  • Grottoli A.G, Tchernov D., Winters G. (2017). Physiological and Biogeochemical Responses of Super-Corals to Thermal Stress from the Northern Gulf of Aqaba, Red Sea. Frontiers in Marine Science 4. 
  • Katsanevakis S, Mackelworth P, Coll M, Fraschetti S, Mačić V, Giakoumi S, Jones P, Levin N, Albano P, Badalamenti F, Brennan R, Claudet J, Culibrk D, D'Anna G, Deidun A, Evagelopoulos A, García-Charton J, Goldsborough D, Holcer D, Jimenez C, Kark S, Sørensen T, Lazar B, Martin G, Mazaris A, Micheli F, Milner-Gulland E, Pipitone C, Portman M, Pranovi F, Rilov G, Smith R, Stelzenmüller V, Vogiatzakis I, Winters G (2017). Advancing marine conservation in European and contiguous seas with the MarCons Action. Research Ideas and Outcomes 3: e11884. 
  • Groner E., Rapaport A., Segev N., Ragolsky G., Alexander K., Rabinowitz R., Grunfeld M., Nelvitsky R., Shalmon B., Tsoar A., Isaacson S., Moshe I., Winters G. (2017). A standardized protocol to monitor Acacia trees in the Arava. Negev, Dead Sea and Arava Studies 9(1), 1–14. 
  • Rotini A., Mejia A. Y., Costa R. , Migliore L., Winters G. (2017). Ecophysiological plasticity and bacteriome shift in the seagrass Halophila stipulacea along a depth gradient in the Northern Red Sea. Frontiers in Plant Science 7: 1-12.
  • Winters G., Edelist D., Shem-Tov R., Beer S., Rilov G. (2016). A low cost field-survey method for mapping seagrasses and their potential threats: an example from the northern Gulf of Aqaba, Red Sea. Aquatic conservation: marine and freshwater ecosystems. DOI: 10.1002/aqc.268
  • Mejia A.Y., Rotini A., Lacasella F., Bookman R.,Thaller M.C., Shem-Tov R., Winters G., Migliore L. (2016). Assessing the ecological status of seagrasses using morphology, biochemical descriptors and microbial community analyses. A study in Halophila stipulacea (Forsk.) Aschers meadows in the northern Red Sea. Ecological Indicators 60: 1150-1163.
  • Winters G., Ryvkin I., Rudkov T., Moreno Z., Furman A. (2015). Mapping underground layers in the super arid Gidron Wadi using electrical resistivity tomography (ERT). Journal of Arid Environments 121 (2015) 79-83.
  • Franssen U.S., Gu J., Winters G., Huylmans A-K. , Wienpahl I., Sparwel M., Coyer J.A., Olsen J.L., Reusch T.B.H. , Bornberg-Bauer E. (2014). Genome-wide transcriptomic responses of the seagrasses Zostera marina and Nanozostera noltii under a simulated heatwave confirm functional types. Marine Genomics. Apr 3. pii: S1874-7787(14)00030-0. doi: 10.1016/j.margen.2014.03.004.
  • Winters G., Shklar G., Korol L. (2013) Characterizations of microsatellite DNA markers for Acacia tortilis. Conservation Genetics Resources. DOI 10.1007/s12686-013-9913-9
  • Gu J, Weber K, Klemp E, Winters G, Franssen SU, Wienpahl I, Huylmans AK, Zecher K, Reusch TB, Bornberg-Bauer E, Weber AP (2012) Identifying core features of adaptive metabolic mechanisms for chronic heat stress attenuation contributing to systems robustness. Integrative Biology (4): 480-493.  DOI: 10.1039/c2ib00109h
  • Franssen U.S., Gu J., Bergmann, N., Winters G., Klostermeier U.C., Rosenstiel P., Bornberg-Bauer E., and Reusch T.B.H. (2011)Transcriptomic resilience to global warming in the seagrass Zostera marina, a marine foundation species. Proceedings of the National Academy of Sciences 108 (48): 19276-19281.  DOI: 10.1073/pnas.1107680108
  • Winters G., Nelle P., Fricke B. and Reusch T. (2011) The effects of a simulated heat wave on the photophysiology and gene expression of high and low-latitude populations of Zostera marina. Marine Ecology Progress Series 435:83-95.  DOI: 10.3354/meps09213
  • Bergmann N., Winters G., Rauch G., Eizaguirre C., Gu J., Nelle P., Fricke B. and Reusch T.B.H. (2010) Population-specificity of heat stress gene induction in northern and southern eelgrass Zostera marina populations under simulated global warming. Molecular Ecology 19:2870-2883. DOI: 10.1111/j.1365-294X.2010.04731.x
  • Winters G., Beer S., Ben Zvi B., Z., Brickner I., Loya Y. (2009a) Spatial and temporal photoacclimation of Stylophora pistillata: zooxanthella size, pigmentation, location and clade. Marine Ecology Progress Series 384: 107–119. DOI: 10.3354/meps08036
  • Winters G., Holzman R., Blekhman A., Beer S., Loya Y. (2009b) Photographic assessment of coral chlorophyll contents: implications for ecophysiological studies and coral monitoring. Journal of Experimental Marine Biology and Ecology 380: 25-35
  • Downs C.A., Kramarsky-Winter E., Woodley C.M., Downs A., Winters G., Loya Y., Ostrander G.K. (2009) Cellular pathology and histopathology of hypo-salinity exposure on the coral Stylophora pistillataScienceof the Total Environment 407: 4838-4851. DOI: 10.1016/j.scitotenv.2009.05.015 
  • Kuguru B., Winters G., Santos S.R., BeerS., Chadwick N.E. (2007). Adaptation strategies of the corallimorpharian Rhodactis rhodostoma to irradiance and temperature. Marine Biology. 151:1287-1298. (shared 1st authorship). DOI: 10.1007/s00227-006-0589-5
  • Winters G., Loya Y., Beer S. (2006) In situ measured seasonal variations in Fv/Fm of two common Red Sea corals.Coral Reefs 25: 593-598. DOI: 10.1007/s00338-006-0144-3
  • Winters G., Loya Y., Routtgers R., Beer S. (2003). Photoinhibition in shallow-water colonies of the coral Stylophora pistillata as measured in situ. Limnology and Oceanography48: 1388–1393.