Contacts Centre for Environmental Biology



PhD, Academics

CBA research group(s):

Environmental Stress
and Functional Ecology

Personal webpage

Team webpage

Cristina Máguas

Main Research Interests

My main research interests are ecophysiology and isotopic ratio mass spectrometry. Ecology. Mediterranean ecosystems. Lichenology. Exotic  invader plants.


Academic Qualifications

- 1997 PhD in Biology - Ecology and Systematics (University of Lisbon)

- 1987 5-year college graduation in Biology (University of Lisbon)

Recent Publications

Badalamenti E., Gristina L., La Mantia T., Novara A., Pasta S., Lauteri M., Fernandes P., Correia O. & Máguas C. 2014. Relationship between recruitment and mother plant vitality in the alien species Acacia cyclops A. Cunn. ex G. Don. Forest Ecology and Management 331:237-244.

Augusto S., Máguas C. & Branquinho C. 2013. Guidelines for biomonitoring persistent organic pollutants (POPs), using lichens and aquatic mosses – a review. Environmental Pollution 180:330-338.

Augusto S., Pereira M.J., Máguas C. & Branquinho C. 2013. A step towards the use of biomonitors as estimators of atmospheric PAHs for regulatory purposes. Chemosphere 95:626-632.

Dubbert M., Cuntz M., Piayda A., Máguas C. & Werner C. 2013. Partitioning evapotranspiration – Testing the Craig and Gordon model with field measurements of oxygen isotope ratios of evaporative fluxes. Journal of Hydrology 496:142–153.

Augusto S., Pereira M.J., Máguas C., Soares A. & Branquinho C. 2012. Assessing human exposure to PAHs in a petrochemical region based on data from environmental biomonitor. Journal of Toxicology and Environmental Health, Part A 75:819–830.

Pinho P., Bergamini A., Carvalho P., Branquinho C., Stofer S., Scheidegger C. & Máguas C. 2012. Lichen functional groups as ecological indicators of the effects of land-use in Mediterranean ecosystems. Ecological Indicators 15:36-42.

Pinho P., Theobald M.R., Dias T., Tang Y.S., Cruz C., Martins-Loução M.A., Máguas C., Sutton M. & Branquinho C. 2012. Critical loads of nitrogen deposition and critical levels of atmospheric ammonia for Mediterranean evergreen woodlands. Biogeosciences 9:1205-1215.

Rascher K.G, Hellmann C., Máguas C. & Werner C. 2012. Community scale 15N isoscapes: tracing the spatial impact of an exotic N2-fixing invader. Ecology Letters 15(5):484-491.

Unger S., Máguas C., Pereira J.S., David T.S. & Werner C. 2012. Interpreting post-drought rewetting effects on soil and ecosystem carbon dynamics in a Mediterranean oak savannah. Agricultural and Forest Meteorology 154-155:9-18.

Vinagre C., Máguas C., Cabral H.C. & Costa M.J. 2012. Food web structure of the coastal area adjacent to the Tagus estuary revealed by stable isotope analysis. Journal of Sea Research 67(1):21–26.

Werner C., Schnyder H., Cuntz M., Keitel C., Zeeman C., Dawson T., Badeck F., Brugnoli E., Ghashghaie J., Grams T., Kayler Z., Lakatos M., Lee X., Máguas C., Ogée J., Rascher K., Siegwolf R., Unger S., Welker J., Wingate L., & Gessler A. 2012. Progress and challenges in using stable isotopes to trace plant carbon and water relations across scales. Biogeosciences 9(8):3083-3111.

Augusto S., Gonzalez C., Vieira R., Máguas C., & Branquinho C. 2011. Evaluating Sources of PAHs in Urban Streams Based on Land Use and Biomonitors. Environmental Science & Technology 45(8):3731–3738.

França S., Vasconcelos R.P., Tanner S.E., Máguas C., Costa M.J. & Cabral H.N. 2011. Assessing food web dynamics and relative importance of organic matter sources for fish species in two Portuguese estuaries: a stable isotope approach. Marine Environmental Research 72:204-215.

Hellmann C., Sutter R., Rascher K., Máguas C., Correia O. & Werner C. 2011. Impact of an exotic N2-fixing Acacia on composition and N status of a native Mediterranean community. Acta Oecologica 37(1):43-50 .

Máguas C., Rascher K.G., Martins-Loução M.A., Carvalho P., Pinho P., Ramos M., Correia O. & Werner C. 2011. Responses of woody species to spatial and temporal ground water changes in coastal sand dune systems. Biogeosciences 8:3823-3832.

Pinho P., Dias T., Cruz C., Tang Y.S., Sutton M., Martins-Loução M.A., Máguas C. & Branquinho C. 2011. Using lichen functional-diversity to assess the effects of atmospheric ammonia in Mediterranean woodlands. Journal of Applied Ecology 48:1107–1116.

Rascher K.G., Grosse-Stoltenberg A., Máguas C.  & Werner C. 2011. Understory invasion by Acacia longifolia alters the water balance and carbon gain of a Mediterranean pine forest. Ecosystems 14(6):904–919.

Rascher K.G., Grosse-Stoltenberg A., Máguas C., Meira J. & Werner C. 2011. Acacia longifolia invasion impacts vegetation structure and regeneration dynamics in open dunes and pine forests. Biological Invasions 13(5):1099–1113.

Rodrigues C., Brunner M., Steiman S., Bowen G.J., Nogueira J.M.F., Gautz L., Prohaska T. & Máguas C.2011. Isotopes as Tracers of the Hawaiian Coffee-Producing Regions. Journal of Agricultural and Food Chemistry, 59(18):10239–10246.

Rodrigues C., Máguas C. & Prohaska T. 2011. Strontium and oxygen isotope fingerprinting of green coffee beans and its potential to proof authenticity of coffee. Food Chemistry 232(2):361-373.

Vinagre C., Máguas C., Cabral H.C. & Costa M.J. 2011. Effect of body size and body mass on delta C-13 and delta N-15 in coastal fishes and cephalopods. Estuarine, Coastal and Shelf Science 95(1):264-267.

Vinagre C., Máguas C., Cabral H.C. & Costa M.J. 2011. Nekton migration and feeding location in a coastal area – a stable isotope approach. Estuarine, Coastal and Shelf Science 91(4):544-550.

Vinagre C., Máguas C., Cabral H.C. & Costa M.J. 2011. Spatial variation in river runoff into a coastal area – an ecological approach. Journal of Sea Research 65(3):362-367.

Werner C., Badeck F., Brugnoli E., Cohn B., Cuntz M., Dawson T., Gessler A., Ghashghaie J., Grams T.E.E., Kayler Z., Keitel C., Lakatos M., Lee X., Máguas C., Ogée J., Rascher K.G., Schnyder H., Siegwolf R., Unger S., Welker J., Wingate L. & Zeeman M.J. 2011. Linking carbon and water cycles using stable isotopes across scales: progress and challenges. Biogeosciences 8(2):2659-2719.

Augusto S., Máguas C., Matos J., Pereira M.J. & Branquinho C. 2010. Lichens as an integrating tool for monitoring PAH atmospheric deposition: A comparison with soil, air and pine needles. Environmental Pollution 158(2):483-489.

Keidel A., Von Stetten D., Rodrigues C., Máguas C. & Hildebrandt P. 2010. Discrimination of green arabica and robusta coffee beans by Raman spectroscopy. Journal of Agricultural and Food Chemistry 58(21):11187–11192.

Rascher K.G., Máguas C. & Werner C. 2010. On the use of phloem sap δ13C as an indicator of canopy carbon discrimination. Tree Physiology 30(12):1499-1514.

Sampaio L., Freitas R., Máguas C., Rodrigues A. & Quintino V. 2010. Coastal sediments under the influence of multiple organic enrichment sources: An evaluation using carbon and nitrogen stable isotopes. Marine Pollution Bulletin 60(2):272-282.

Tcherkez G., Schäufele R., Nogués S., Piel C., Boom A., Lanigan G., Barbaroux C., Mata C., Elhani S., Hemming D., Máguas C., Yakir D., Badeck F.W., Griffiths H., Schnyder H. & Ghashghaie J. 2010. On the 13C/12C isotopic signal of day and night respiration at the mesocosm level. Plant Cell And Environment 33(6):900-913.

Unger S., Máguas C., Pereira J.S., Aires L., David T. & Werner C. 2010. Disentangling drought-induced variation in ecosystem and soil respiration by stable isotope partitioning.  Oecologia 163(4):1043–1057.

Unger S., Máguas C., Pereira J.S., David T. & Werner C. 2010. The influence of precipitation pulses on soil respiration – Assessing the “Birch effect” by stable carbon isotopes. Soil Biology & Biochemistry 42(10):1800-1810.

Werner C. & Máguas C. 2010. Carbon isotope discrimination as a tracer of functional traits in a mediterranean macchia plant community. Functional Plant Biology 37(5):467-477.

Werner C., Zumkier U., Beyschlag W. & Máguas C. 2010. High competitiveness of a resource demanding invasive acacia under low resource supply. Plant Ecology 206(1):83-96.

Augusto S., Máguas C. & Branquinho C. 2009. Understanding the performance of different lichen species as biomonitors of atmospheric dioxins and furans: potential for intercalibration. Ecotoxicology 18:1036-1042.

Augusto S., Máguas C., Matos J., Pereira M.J., Soares A. & Branquinho C. 2009. Spatial modelling of PAHs in lichens for fingerprinting of multi-source atmospheric pollution. Environmental Science & Technology 43:7762-7769.

Hartard B., Cuntz M., Máguas C. & Lakatos M. 2009. Water isotopes in desiccating lichens. Planta 231:179–193.

Rodrigues C.I., Maia R., Miranda M., Ribeirinho M., Nogueira J.M.F. & Máguas C. 2009. Stable isotope analysis for Green Coffee Bean: a possible method for geographic origin discrimination. Journal of Food Composition and Analysis 22:463-471.

Unger S., Máguas C., Pereira J.S., Aires L., David T.S. & Werner C. 2009. Partitioning carbon fluxes in a Mediterranean oak forest to disentangle changes in ecosystem sink strength during drought. Agricultural and Forest Meteorology 149:949-961.

Branquinho C., Gaio-Oliveira G., Augusto S., Pinho P., Máguas C. & Correia O. 2008. Biomonitoring spatial and temporal impact of atmospheric dust from a cement industry. Environmental Pollution 151(2):292-299.

Hartand B., Máguas C. & Lakatos M. 2008. Delta O-18 characteristics of lichens and their effects on evaporative processes of the subjacent soil. Isotopes in Environmental and Health Studies 44(1):111-125.

Pinho P., Augusto S., Máguas C., Pereira M.J., Soares A. & Branquinho C. 2008. Impact of neighborhood land-cover in epiphytic lichen diversity: Analysis of multiple factors working at different spatial scales. Environmental Pollution 152(2):414-422.

Pinho P., Augusto S., Martins-Loução M.A., Pereira M.J., Soares A., Máguas C. & Branquinho C. 2008. Causes of change in nitrophytic and oligotrophic lichen species in a Mediterranean climate: Impact of land cover and atmospheric pollutants. Environmental Pollution 154(3):380-389.

Rodrigues C., Marta L., Maia R., Miranda M. & Máguas C. 2007. Application of solid phase extraction to brewed coffee caffeine and organic acids determination by UV/HPLC. Journal of Food Composition and Analysis 20:440-448.

Werner C., Hasenbein N., Maia R., Beyschlag W. & Máguas C. 2007. Evaluating high time-resolved changes in carbon isotope ratio of respired CO2 by a rapid in-tube incubation technique. Rapid Communications in Mass Spectrometry 21(8):1352-1360.


Ongoing Projects

  • Pursuing green coffe geographic origin discrimination through relations between isotopes and environmental factors (PTDC/AGR-AAM/104357/2008).

  • Modeling ecosystem structure and functional diversity as early-warning indicators of desertification and land - degradation - from regional to local level (PTDC/AAC-CLI/104913/2008).

  • Developing an adaptive management system for predicting and mitigating damage caused the pine wilt nematode Bursaphelenchus xylophilus (Nematoda: Aphelenchoididae) in Portugal (PTDC/AGR-CFL/098869/2008).

  • WUSSIAAME – Water use, survival strategies and impact of agrochemicals on water resources in agricultural Mediterranean ecosystems (PTDC/AAC-AMB/100635/2008).

  • Spheres of ecosystem response to nitrogen (SERN): A case study in a Mediterranean-type ecosystem in southern Portugal (PTDC/BIA-BEC/ 99323/2008).

  • Effects of marine influence on the foredune vegetation: study of the ecophysiology and water resources using isotopic analysis (CGL2008-10577, Spain).

  • Competitive balance of an invasive alien and native dune species under changes in ground water availability. (DFG, Germany).

  • Disentangling seasonal vegetation effects on ecosystem evapotranspiration and water use efficiency of a Mediterranean savannah-type oak forest (DFG, Germany).


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