Pia H. Moisander


2002 Ph.D. University of North Carolina at Chapel Hill

1994 M.S. University of Helsinki, Finland



Associate Professor

Department of Biology

University of Massachusetts Dartmouth

285 Old Westport Road

North Dartmouth, MA 02747-2222

phone: 508-999-8222 

Lab and office: VRAD 209

email: pmoisander at umassd dot edu


  1. (50)Shoemaker KM, Duhamel S, Moisander PH. 2019. Copepods promote bacterial community changes in surrounding seawater through farming and nutrient enrichment. Environmental Microbiology doi: 10.1111/EMI.14723

  2. (49)Moisander PH, Shoemaker KM, Daley M, McCliment E, Larkum J, Altabet MA. 2018.     Copepod-associated Gammaproteobacteria respire nitrate in the open ocean surface layers. Frontiers in Microbiology 9:2390 doi: 10.3389/fmicb.2018.02390

  3. (48)Benavides M, Shoemaker KM, Moisander PH, Dittmar T, Duhamel S, Van Wambeke F,  Grosso O, Bonnet S. 2018. Aphotic N2 fixation along an oligotrophic to ultraoligotrophic transect in the Western Tropical South Pacific Ocean. Biogeosciences DOI: 10.5194/bg-15-3107-2018

  4. (47)Moisander PH, Benavides M, Berman-Frank I, Bonnet S, White A, Riemann L. 2017. Chasing after non-cyanobacterial nitrogen fixation in marine pelagic environments. Frontiers in Microbiology 8:1736 DOI: 10.3389/fmicb.2017.01736

  5. (46)Berthelot H, Benavides M, Moisander PH, Grosso O, Bonnet S. 2017. High nitrogen fixation rates in the particulate and dissolved pools in the Western Tropical Pacific. Geophysical Research Letters 44: 8414-8423

  6. (45)Shoemaker KM, Moisander PH. 2017. Seasonal variation in the copepod gut microbiome    in the subtropical North Atlantic Ocean. Environmental Microbiology 19: 3087-3097

  7. (44)Daley MC, Urban-Rich J, Moisander PH. 2016. Bacterial associations with the hydromedusa Nemopsis bachei and scyphomedusa Aurelia aurita from the North Atlantic Ocean. Marine Biology Research DOI 10.1080/17451000.2016.1228974

  8. (43)Benavides M, Moisander PH, Daley MC, Bode A, Aristegui J. 2016. Longitudinal variability of diazotrophs in the subtropical North Atlantic Ocean. Journal of Plankton Research 38:662-672

  9. (42)Benavides M, Moisander PH, Berthelot H, Dittmar T, Grosso O, Bonnet S. 2015.     Mesopelagic heterotrophic N2 fixation related to organic matter composition in the Solomon and Bismarck Seas (Southwest Pacific). PLoS ONE 10(12): e0143775.

  10. (41)Moisander PH, Sexton AD, Daley MC. 2015. Stable associations masked by temporal variability in the marine copepod microbiome. PLoS ONE 10(9): e0138967

  11. (40)Severin I, Bentzon-Tilia M, Moisander PH, Riemann L. 2015. Nitrogenase expression in estuarine bacterioplankton influenced by organic carbon and availability of oxygen. FEMS Microbiology Letters 326(14): fnv105 

  12. (39)Shoemaker KM, Moisander PH. 2015. Microbial diversity in association of copepods in    the North Atlantic subtropical gyre. FEMS Microbiology Ecology 91(7): fiv064

  13. (38)Scavotto R, Dziallas C, Benzon-Tilia M, Riemann L, Moisander PH. 2015. Microbial community composition in association of copepods in the North Atlantic coastal waters. Environmental Microbiology 17(10): 3754-3765

  14. (37)Dabundo R, Lehmann MF, Treibergs L, Tobias CR, Altabet MA, Moisander PH, Granger J. 2014. Contamination of commercial 15N2 gas stocks with 15N-labeled nitrate and ammonium and consequences for N2 fixation measurements. PLoS ONE 9(10): e110335.

  15. (36)Moisander PH, Serros T, Paerl RW, Beinart RA, Zehr JP. 2014. Gammaproteobacterial     diazotrophs and nifH expression in surface waters of the South Pacific Ocean. The ISME Journal 8: 1962-1973

  16. (35)Luo Y-W, Doney SC, Anderson LA, Benavides M, Bode A, Bonnet S, Bostrom K, Bottjer D, Capone DG, Carpenter EJ, Chen YL, Church MJ, Dore JE, Falcon LI, Fernandez A, Foster RA, Furuya K, Kitajima S, Langlois RJ, LaRoche J, Letelier RM, Maranon E, McGillicuddy DJ, Moisander PH, Moore MC, Mourino-Carballido B, Mulholland MR, Needoba JA, Orcutt KM, Poulton AJ, Raimbault P, Rees AP, Riemann L, Shiozaki T, Subramaniam A, Tyrrell T, Turk-Kubo, KA, Varela M, Villareal TA, Webb EA, White AE, Wu J, Zehr JP. 2012. Database of diazotrophs in global ocean: Abundances, biomass and nitrogen fixation rates. Earth System Science Data 4:47-73

  17. (34)Mulholland MR, Filippino KC, Bernhardt PW, Blanco J, Mondragon E, Turk K, Moisander PH, Zehr JP. 2012. Rates of dinitrogen fixation and the abundance of diazotrophs in North Atlantic coastal waters between Cape Hatteras and Georges Bank. Limnol Oceanogr 57:1067-1083

  18. (33)Moisander PH, Cheshire LA, Braddy J, Calandrino L, Hoffman M, Piehler MF, Paerl HW.2012. Facultative diazotrophy increases competitive strength of Cylindrospermopsis raciborskii under fluctuating nitrogen availability. FEMS Microbiol Ecol 79:800-811

  19. (32)Moisander PH, Zhang RF, Boyle EA, Hewson I, Montoya JP, Zehr JP. 2012. Analogous nutrient limitations in unicellular diazotrophs and Prochlorococcus in the South Pacific Ocean. The ISME Journal 6:733-744

  20. (31)Bombar D, Moisander PH, Dippner JW, Foster RA, Voss M, Karfield B, Zehr JP. 2011. Distribution of diazotrophic micro-organisms and nifH gene expression in the Mekong River plume during intermonsoon. Mar Ecol Prog Ser 424:39-U55.

  21. (30)Moisander PH, Beinart RA, Hewson I, White A, Johnson K, Carlson C, Montoya JM, Zehr JP. 2010. Unicellular cyanobacterial distributions broaden the oceanic N2 fixation domain. Science 327:1512-1514.

  22. (29)Moisander PH, Lehman PW, Ochiai M, Corum S. 2009. Diversity of Microcystis aeruginosa in the Klamath River and San Francisco Bay delta, California. Aquat Micr Ecol 57:19-31.

  23. (28)Moisander PH, Ochiai M, Lincoff A. 2009. Nutrient limitation of Microcystis aeruginosa in northern California Klamath River reservoirs.  Harmful Algae 8:889-897.

  24. (27)Hewson I, Poretsky R, Beinart RA, White A, Shi T, Bench SR, Moisander PH, Paerl RW,Tripp HJ, Montoya JP,, Moran MA and JP Zehr. 2009. In situ transcriptomic analysis of the globally important keystone N2-fixing taxon Crocosphaera watsonii in the Southwest Pacific Ocean. The ISME Journal 3:618-631.

  25. (26)Zehr JP, Hewson I, Moisander PH. 2009. Molecular biology techniques and applications for ocean sensing. Ocean Science 5:101-113.

  26. (25)Moisander PH, Paerl HW, Zehr JP. 2008. Effects of inorganic nitrogen on taxa-specific cyanobacterial growth and nifH expression in a subtropical estuary. Limnol Oceanogr 53:2519-2432.

  27. (24)Piehler MF, Dyble J, Moisander PH, Chapman AD, Hendrickson J, and Paerl HW. 2009. Interactions between nitrogen dynamics and the phytoplankton community in Lake George, Florida, USA. Lake and Reservoir Management 25:1-14.

  28. (23)Moisander PH, Beinart RA, Voss M, Zehr JP. 2008. Diversity and abundance of diazotrophs in the South China Sea during intermonsoon.  The ISME Journal 2:954-967.

  29. (22)Moisander PH, Paerl HW, Dyble J, Sivonen K. 2007. Phosphorus limitation and diel control in nitrogen-fixing cyanobacteria in the Baltic Sea. Mar Ecol Prog Ser 345:41-50.

  30. (21)Hewson I, Moisander PH, Morrison AE, Zehr JP. 2007. Diazotrophic bacterioplankton in a coral reef lagoon: Phylogeny, diel expression, and response to phosphate enrichment.  The ISME Journal 1:78-91.

  31. (20)Moisander PH, Morrison AE, Ward BB, Jenkins BD, Zehr JP. 2007. Spatial-temporal variability in diazotroph assemblages in Chesapeake Bay using an oligonucleotide nifH microarray. Environ Microbiol 9:1823-1835.

  32. (19)Hewson I, Moisander PH, Achilles, KA, Carlson, CA, Jenkins BD, Mondragon EA, Morrison AE, Zehr JP. 2007. Characteristics of diazotrophs in epi-to abyssopelagic waters of the Sargasso Sea. Aquat Micr Ecol 46:15-30.

  33. (18)Sivonen K, Halinen K, Sihvonen L, Koskenniemi K, Sinkko H, Rantasärkkä K, Moisander PH and Lyra C. 2007. Microbiological diversity and function in the Baltic Sea with emphasis on cyanobacteria. Ambio 36 (2-3):180-185.

  34. (17)Moisander PH, Shiue L, Steward G, Jenkins BD, Bebout BM, Zehr JP. 2006. Application of a nifH oligonucleotide microarray for profiling diversity of N2-fixing microorganisms in marine microbial mats. Environ Microbiol 8:1721-1735.

  35. (16)Moisander PH, Piehler MF, Paerl HW. 2005. Diversity and activity of epiphytic nitrogen-   fixers on standing dead stems of the salt marsh grass Spartina alterniflora. Aquat Micr Ecol 39: 271-279.

  36. (15)Paerl, HW, Piehler MF, Valdes L, Dyble J, Moisander PH, Pinckney JL, Steppe TF. 2005. Determining anthropogenic and climatically-induced change in aquatic ecosystems using Microbial indicators: An integrative approach. Verh Internat Verein Limnol 29:89-113.

  37. (14)Moisander PH, Steppe TF, Hall NS, Kuparinen J, Paerl HW. 2003. Variability in nitrogen     and phosphorus limitation for Baltic Sea phytoplankton during nitrogen-fixing cyanobacterial blooms. Mar Ecol Prog Ser 262:81-95.

  38. (13)Paerl HW, Valdes LM, Pinckney JL, Piehler MF, Dyble J Moisander PH. 2003. Microalgae as indicators of estuarine and coastal ecological change. Bioscience 53:953-964.

  39. (12)Paerl HW, Dyble J, Moisander PH, Noble RT, Piehler MF, Pinckney JL, Twomey LJ, Valdes LM. 2003. Microbial indicators of aquatic ecosystem change: Current applications to eutrophication studies. FEMS Microbiol Ecol. 1561:1-14.

  40. (11)Moisander PH, Hench JL, Kononen K, Paerl HW. 2002. Small-scale shear effects on heterocystous cyanobacteria. Limnol Oceanogr 47:109-119.

  41. (10)Moisander PH, McClinton E, Paerl HW. 2002. Salinity effects on growth, photosynthetic parameters, and nitrogenase activity in estuarine planktonic cyanobacteria. Micr Ecol 43:432-442.

  42. (9)Hietanen S, Moisander PH, Kuparinen J, Tuominen L. 2002. No sign of denitrification in a Baltic Sea cyanobacterial bloom. Mar Ecol Prog Ser 242:73-82.

  43. (8)Piehler MF, Dyble J, Moisander PH, Pinckney JL, Paerl HW. 2002. Effects of modified nutrient concentrations and ratios on the structure and function of the native phytoplankton community in the Neuse River Estuary, North Carolina, USA. Aquat Ecol 36:371-385.

  44. (7)MacGregor BJ, Van Mooy B, Baker BJ, Mellon M, Moisander PH, Paerl HW, Zehr J, Hollander D, Stahl DA.  2001. Microbiological, molecular biological, and stable isotopic evidence for nitrogen fixation in the open waters of Lake Michigan. Environ Microbiol 3:205-219.

  45. (6)Paerl HW, Fulton R, Moisander PH, Dyble J. 2001. Harmful freshwater algal blooms, with an emphasis on cyanobacteria. The Scientific World 1:76-113.

  46. (5)Moisander PH, Paerl HW. 2000. Growth, primary productivity, and nitrogen fixation potential of Nodularia spp. (Cyanophyceae) in water from a subtropical estuary in the United States. J Phycol 36:645-658.

  47. (4)Kononen K, Huttunen M, Kanoshina I, Laanemets J, Moisander P, Pavelson J. 1999. Horizontal, vertical, and temporal variability of a dinoflagellate-cyanobacterium community in a changing hydrodynamical regime: A case study at the entrance to the Gulf of Finland. Mar Ecol Prog Ser 186:43-57.

  48. (3)Moisander P, Kononen K, Rantajärvi E, Huttunen, M. 1997. Phytoplankton community in relation to salinity fronts at the entrance to the Gulf of Finland, Baltic Sea. Ophelia 46:187-203.

  49. (2)Lehtimäki J, Moisander P, Sivonen K, Kononen K. 1997. Growth, nitrogen fixation, and nodularin production by two Baltic Sea cyanobacteria. Appl Environ Microbiol 63:1647-1656.

  50. (1)Moisander P, Lehtimäki J, Sivonen K, Kononen K. 1996. Comparison of 15N2 and acetylene reduction methods for the measurement of nitrogen fixation by Baltic Sea cyanobacteria. Phycologia 35(6 Suppl):140-146.