Ramsy Agha

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

Müggelseedamm 301, 12587 Berlin

Evolutionsökologie von Krankheiten

Aquatic microbial ecology

Cyanobacteria, cyanotoxins and other bioactive compounds

Host-parasite interactions

Fungal (chytrid) parasitism


Have a look to our Lab's web and my current research!


2015 (Oct) - Present  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


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.  

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