Ramsy Agha

0049 30 64 181 745
+49 (30) 64 181 682

Müggelseedamm 301, 12587 Berlin



Visit my personal website!

Unter den folgenden Links können Sie mehr über mein jetziges Forschungsprojekt erfahren!

Additional links to personal profiles: Google Scholar | Researchgate  | Publons |​​​​​​ ​Twitter


Aquatische mikrobielle Ökologie

Cyanobakterien, Cyanotoxine und andere bioaktive Verbindungen

Wirt/Parasit Interaktionen

Pilzparasitismus (Chytridien)




2019  - present  Principal Investigator (Eigene Stelle) Institut für Gewässerökologie und Binnenfischerei (IGB), Berlin

2017  - 2018 Postdoctoral Fellow. Institut für Gewässerökologie und Binnenfischerei (IGB), Berlin

2015  - 2017 Alexander von Humboldt postdoctoral fellow. Institut für Gewässerökologie und Binnenfischerei (IGB), Berlin

2014–2015 Postdoctoral Fellow. Institut für Gewässerökologie und Binnenfischerei (IGB), Berlin

2013 – 2014 Postdoctoral Fellow. Biology Dpt. Universidad Autónoma Madrid.

2009 - 2013 PhD in Microbial Ecology. Univ. Autónoma Madrid. PhD Dissertation: "Chemotypical subpopulations in planktonic cyanobacteria. Ecology and application in advanced monitoring tools" (cum laude)

2007- 2009    MSc in Inland Water Quality Assessment. Joint degree at Universidad Autónoma Madrid (Spain) and Mälardalen Högskola (Sweden).Thesis: “Cyanobacteria and cyanotoxins in Spanish recreational water bodies and evaluation of the chemotypical stability of toxic Microcystis aeruginosa”. 

Bedeutung von parasitären Pilzen in der Plankton-Ökologie

Die kürzliche Entdeckung einer bisher unberücksichtigten Diversität von weit verbreiteten parasitären Pilzen (Chytriden), welche Phytoplankton infizieren, stellt unser Verständnis hinsichtlich der Funktion aquatischer Ökosysteme in Frage. Durch eine Kombination aus physiologischen, ökologischen und evolutionsbiologischen Methoden versuchen wir, die Rolle von Chytriden in pelagischen Nahrungsnetzen zu verstehen.
Ramsy Agha
(Abt. 2) Ökosystemforschung




Thijs Frenken; Elisabet Alacid; Stella A. Berger; Elizabeth C. Bournr; Melanie Gerphagnon; Hans-Peter Grossart; Alena S. Gsell; Bas W. Ibelings; Maiko Kagami; Frithjof C. Küpper; Peter M. Letcher; Adeline Loyau; Takeshi Miki; Jens C. Nejstgaard; Serena Rasconi; Albert Rene; Thomas Rohrlack; Keilor Rojas-Jimenez; Dirk S. Schmeller; Bettina Scholz; Kensuke Seto; Telesphore Sime-Ngando; Assaf Sukenik; Dedmer B. van de Waal; Silke van den Wyngaert; Ellen Van Donk; Justyna Wolinska; Christian Wurzbacher; Ramsy Agha

Integrating chytrid fungal parasites into plankton ecology: research gaps and needs

Environmental Microbiology. - 19(2017)10, S. 3802-3822


Vollständige Publikationsliste


M.González-Pleiter, S. Cirés L. Wörmer, R. Agha, G. Pulido-Reyes, K. Martín-Betancora, A. Rico, F. Leganés, A.Quesada, F. Fernández-Piñas (2019). Ecotoxicity assessment of microcystins from freshwater samples using a bioluminescent cyanobacterial bioassay. Chemosphere. https://doi.org/10.1016/j.chemosphere.2019.124966

R. Taube., J. Fabian, S. Van den Wyngaert, R. Agha, C. Baschien, M.Gerphagnon, M. Kagami, A. Krüger and K. Premke (2019). Potentials and limitations of quantification of fungi in freshwater environments based on PLFA profiles. Fungal Ecology. https://doi.org/10.1016/j.funeco.2019.05.002

T. Frenken, Ramsy Agha, D. Schmeller, P. van West and J. Wolinska (2019). Biological concepts for the control of aquatic zoosporic diseases. Trends in Parasitology. doi:10.1016/j.pt.2019.04.003

B. Ortiz-Canavate, J. Wolinska, Ramsy Agha (2019). Fungicides at environmentally relevant concentrations can promote the proliferation of toxic bloom-forming cyanobacteria by inhibiting natural fungal parasite epidemics. Chemosphere. doi:10.1016/j.chemosphere.2019.04.203

M.A. Lezcano, Ramsy Agha, S. Cirés and A. Quesada (2019). Spatial-temporal survey of Microcystis oligopeptide chemotypes in reservoirs with dissimilar waterbody features and their relation to genetic variation. Harmful Algae. https://doi.org/10.1016/j.hal.2018.11.009



M. Gerphagnon, Ramsy Agha, D. Martin-Creuzburg, A. Bec, F. Perriere, C. Rad-Menéndez, C.M.M. Gachon and J. Wolinska (2018). Comparison of sterol and fatty acid profiles of chytrids and their hosts reveals trophic upgrading of nutritionally inadequate phytoplankton by fungal parasites. Environmental Microbiology. doi:10.1111/1462-2920.14489

Ramsy Agha, A. Groß, T. Rohrlack and J. Wolinska (2018). Adaptation of a chytrid parasite to its cyanobacterial host is hampered by host intraspecific diversity. Frontiers in Microbiology. doi:10.3389/fmicb.2018.00921

Ramsy Agha, A. Groß, M. Gerphagnon, T. Rohrlack and J. Wolinska (2018) Fitness and eco-physiological response of a chytrid fungal parasite infecting planktonic cyanobacteria to thermal and host genotype variation. Parasitology. doi:10.1017/S0031182018000215



Frenken, T., Alacid, E., Berger, S. A., Bourne, E. C., Gerphagnon, M., Grossart, H.-P., Gsell, A. S., Ibelings, B. W., Kagami, M., Küpper, F. C., Letcher, P. M., Loyau, A., Miki, T., Nejstgaard, J. C., Rasconi, S., Reñé, A., Rohrlack, T., Rojas-Jimenez, K., Schmeller, D. S., Scholz, B., Seto, K., Sime-Ngando, T., Sukenik, A., Van de Waal, D. B., Van den Wyngaert, S., Van Donk, E., Wolinska, J., Wurzbacher, C. and Ramsy Agha (2017) Integrating chytrid fungal parasites into plankton ecology. Research gaps and needs. Environmental Microbiology  doi:10.1111/1462-2920.13827



M.A. Lezcano, J. Morón-López, Ramsy Agha, I. López-Heras, L. Nozal, A. Quesada, R. El-Shehawy. (2016) Presence or absence of mlr genes and nutrient concentrations co-determine the microcystin biodegradation efficiency of a natural bacterial community. Toxins 8 (11) 318

Ramsy Agha, M. Saebelfeld, C. Manthey, T. Rohrlack and J. Wolinska. (2016) Chytrid parasitism facilitates trophic transfer between bloom-forming cyanobacteria and zooplankton (Daphnia). Scientific Reports   6:35039 DOI: 10.1038/srep35039

Ramsy Agha, M. M. Labrador, A. de los Ríos and  A. Quesada (2016). Selectivity and detrimental effects of epiphytic Pseudanabaena on Microcystis colonies. Hydrobiologia 777(1)



Ramsy Agha and A. Quesada (2014). Oligopeptides as biomarkers of cyanobacterial subpopulations. Toward an understanding of their biological role. Toxins (6)6 1929-1950.

Ramsy Agha, M.A. Lezcano, M.M. Labrador, S. Cirés and A. Quesada (2014). Seasonal dynamics and sedimentation patterns of Microcystis oligopeptide-based chemotypes reveal subpopulations with different ecological traits. Limnology and Oceanography 59(3) 861-871.

 J. Kleinteich, F. Hildebrand, S.A. Wood, S. Cirés, Ramsy Agha, A. Quesada, D. A. Pearce, P. Convey, F.C. Küpper and D.R. Dietrich (2014). Diversity of toxin and non-toxin containing cyanobacterial mats of meltwater ponds on the Antarctic Peninsula: a pyrosequencing approach. Antarctic Science 2014 1-12

M.C. Casero, A. Ballot, Ramsy Agha, A. Quesada and S. Cirés (2014). Characterization of saxitoxin production and release and phylogeny of sxt genes in paralytic shellfish poisoning toxin-producing Aphanizomenon gracile. Harmful Algae 37: 28-37

S. Cirés, L. Wörmer, A. Ballot, Ramsy Agha, D. Velázquez, M.C. Casero, C. Wiedner and A. Quesada (2014). Phylogeography of cylindrospermopsin and paralytic shellfish toxin-producing Nostocales cyanobacteria from Mediterranean Europe. Applied Environmental Microbiology 80(4) 1359-1365. doi: 10.1128/aem.03002-13



S. Cirés, L. Wörmer, Ramsy Agha, A. Quesada (2013). Overwintering populations of AnabaenaAphanizomenon and Microcystis as potential inocula for summer blooms. Journal of Plankton Research 08/2013.

E. Campo, M. A. Lezcano, Ramsy Agha, S. Cirés, A.Quesada, R. El-Shehawy (2013). First TaqMan assay to identify and quantify the cylindrospermopsin-producing cyanobacterium Aphanizomenon ovalisporum in water. Advances in Microbiology. 3:430-437

Ramsy Agha, S. Cirés, L. Wörmer, A. Quesada (2013). Limited stability of microcystins in oligopeptide compositions of Microcystis aeruginosa (Cyanobacteria): Implications in the definition of chemotypes. Toxins.; 5(6):1089-1104.

P. Urrutia-Cordero, Ramsy Agha, S. Cires, M. A. Lezcano, K.O. Waara, H. Utkilen, A Quesada (2013). Effects of harmful cyanobacteria on the freshwater pathogenic free-living amoeba Acanthamoeba castellaniiAquatic Toxicology; 130-131:9-17.



Ramsy Agha, S. Cirés, L. Wörmer, J. A. Domínguez, A. Quesada (2012). Multi-scale strategies for the monitoring of freshwater cyanobacteria: reducing the sources of uncertainty. Water Research; 46(9):3043-53.



L. Wörmer, S. Cirés, Ramsy Agha, M. Verdugo, C. de Hoyos, A. Quesada (2011). First detection of cyanobacterial PSP (paralytic shellfish poisoning) toxins in Spanish freshwaters. Toxicon; 57(6):918-21.


Older publications

J. M. Peñalosa, R.O. Carpena, S. Vázquez, Ramsy Agha, A. Granado, M.J. Sarro, E. Esteban (2007). Chelate-assisted phytoextraction of heavy metals in a soil contaminated with a pyritic sludge. Science of the Total Environment; 378(1-2):199-204.

S. Vázquez, Ramsy Agha, A. Granado, M.J. Sarro, E. Esteban, J.M. Peñalosa, R.O. Carpena (2006). Use of white lupin plant for phytostabilization of Cd and As polluted acid soil. Water Air and Soil Pollution; 177(1):349-365.  

Seite teilen