Research and publications

See my Research Gate profile for all my contributions.

My main research interests are patterns and drivers of species richness and diversity, biomass and ecology of algae in the Everglades, the Okavango Delta, and other subtropical wetlands, species diversity-biomass relationships, the ways these are influenced by hydrology, limiting nutrients, and habitat, and lately, wetland restoration.

In 2015-2018, I participated in the annual Comprehensive Everglades Restoration Plan (CERP) sampling of periphytic algae, invertebrates and small fish (using throw-trapping) in the Water Conservation Areas and Everglades National Park.

In 2018, I led a multi-author review paper on foundation species in freshwater wetlands that has been now published in Water for the Special Issue “Multiplicity, Characteristics, Main Impacts, and Stewardship of Natural and Artificial Freshwater Environments: Consequences for Biodiversity Conservation“.

In 2017-’18, I analysed data on diatom abundance from 165 samples collected in the FCE LTER sites in Shark River Slough and Taylor Slough from 2004 to 2015 and wrote an article on how and why few core species dominate diatom abundance in Everglades benthic mats. This manuscript is published in Inland Waters.

In 2017-’18, I wrote a collaborative manuscript on how to assess and improve the effectiveness of wetland restoration activities with Dr. Gaiser and Dr. Kominoski (FIU), Dr. Julian (University of Florida); and Dr. Finlayson (Charles Sturt University), and Dr. Gell (Federation University) in Australia. This paper is published in Solutions.

In 2016-’17, I closely co-mentored, with Dr. Gaiser, FIU biochemistry undergraduate student Andres Sola on his experimental project on the effects of drying and rewetting and nutrient loading on periphyton N:P stoichiometry, now published in Water.

In 2016-’17, I conducted a study of how algal dominance markedly increases with limiting nutrient (phosphorus) scarcity and desiccation stress in the Everglades, which was published in Aquatic Ecology.  I presented this work and the comparative study on algal species richness at the 2017 Society of Wetland Scientists meeting in San Juan, Puerto Rico.

In 2015-’16, I produced an extensive comparison of algal richness patterns and drivers in the Okavango Delta and the Everglades, published in Freshwater Biology (submitted version free access: marazzi_et_al-_freshwater_biology_submitted). I presented this research at the 10th INTECOL Wetlands conference in Changshu (China) on September 24 in session #70 “Wetlands: Monitoring and Management”, which I co-moderated. Here I co-organized the “The Next Generation of Wetland Science: Ecosystems, Applications, and Engineering” workshop in collaboration with the International Network of Next Generation Ecologists.

In September 2015, I co-organized a working group on comparative research on inland freshwater wetlands at the All Scientists Meeting of the U.S. Long Term Ecological Research Network seeking to pursue collaborations across LTER sites.

In April 2015, I presented a preliminary comparison of research on algal richness in the Okavango Delta  and the Everglades at the Greater Everglades Ecological Restoration (GEER) meeting (Coral Springs, Florida).

In November 2014, I defended my Ph.D. Thesis “Biodiversity and Biomass of Algae in the Okavango Delta (Botswana), a Subtropical Flood-Pulsed Wetland” at the Environmental Change Research Centre, University College London, United Kingdom.

Refereed Publications:

Marazzi L., Gaiser E.E., Eppinga M.B., Sah J.P., Zhai L., Castañeda-Moya E., Angelini C. 2019. Why Do We Need to Document and Conserve Foundation Species in Freshwater Wetlands? Water 11: 265.

Marazzi L., Gaiser E.E. 2018. Long-term changes in spatially structured benthic diatom assemblages in a major subtropical wetland under restoration. Inland Waters 8: 434-448.

Marazzi L., Finlayson M.C., Kominoski J.S., Julian P., and Gaiser E.E. 2018. Balancing wetland restoration benefits to people and nature. Solutions 9(3).

Sola A.D., Marazzi L., Flores M.M., Kominoski J.S. Gaiser E.E. 2018. Short-Term Effects of Drying-Rewetting and Long-Term Effects of Nutrient Loading on Periphyton N: P StoichiometryWater 10: 105.

Marazzi, L., Gaiser, E.E. and Tobias, F.A.C., 2017. Phosphorus scarcity and desiccation stress increase the occurrence of dominant taxa in wetland benthic primary producer communities. Aquatic Ecology51(4), pp.571-589.

Marazzi, L., Gaiser, E.E., Jones, V.J., Tobias, F.A. and Mackay, A.W., 2017. Algal richness and life‐history strategies are influenced by hydrology and phosphorus in two major subtropical wetlands. Freshwater Biology62(2), pp.274-290.

Marazzi L. 2013. Okavango Delta – Biodiversity of Microalgae, precious invisible plants. – In: Oldeland, J., Erb, C., Finckh, M., Jürgens, N. [Eds.]: Environmental Assessments in the Okavango Region. – Biodiversity & Ecology 5: 161-163. DOI: 10.7809/b-e.00272.

Williamson D.B. and Marazzi L.. 2013. A new Cosmarium (Chlorophyta, Desmidiaceae) variety from the Okavango Delta, Botswana. Quekett Journal of Microscopy 42, 35:37.

Marazzi L., Caserini S., Lapi M., Crovetto G.M., Ballarin Denti A. “Estimate of wood consumption for domestic heating in Lombardy: survey methodology and environmental implications”. La Rivista dei Combustibili, n. 5-2006 (in Italian)

Book chapters:

Bosello F., Marazzi L.; in “Climate change and adaptation strategies in Italy, an economic valuation”, Carraro C. (2008). “Italian Alps and climate change: elements of environmental and economic vulnerability and possible adaptation strategies” Ed. Il Mulino (in Italian)

Reports and press:

Owen M.J., Drake K.R., Maslin M.A., Comberti, C., Marazzi L., Mitchell L.T. (2012). ‘Structural vulnerability and potential catastrophic loss scenarios for North Sea oil and gas infrastructure’, A report by the UCL Environment Institute for JLT Reinsurance Brokers Limited. 220 pp.

McGregor J., Busani M., Marazzi L. (2011) “Case Study Zimbabwe” in “Foresight: Migration and Global Environmental Change Final Project Report”. The UK Government Office for Science.

Bigano A.,De Miglio R.,Galeotti, M., Gargiulo M., Goria A., Lavagno E., Marazzi L., Sferra F., Zanoni D. “Adoption and application of the MARKAL-TIMES model for the creation of a mitigation plan for the Lombardy region”. Report FEEM – Kyoto Lombardia Project, May 2008.

Marazzi L. “Self-funded PhD students deserve support, not stigma and secrecy”. The Guardian – (Higher Education Network), 6 June 2013.