Siver, P.A. 2025. Fossil specimens of the autotrophic protist Mallomonas asmundiae bearing cysts and attached scales from an Eocene locality. Scientific Reports 15, 5207.  DOI: 10.1038/s41598-025-88891-8 PDF

Siver, P.A. 2024. Mallomonas enigmata sp. nov. (Synurales, Chrysophyceae) an Eocene fossil species with a asecond and unique scale morpotype attached to its cyst.  European Journal of Phycology. DOI: 10.1080/09670262.2024.2408296 PDF

Siver, P.A. 2024. Mallomonas gigantica sp. nov., an Eocene synurophyte possessing the largest known siliceous scales. Fottea 24(2): 261-268. PDF   

Andersen, R.A. and P.A. Siver. 2024. Jorgen Kristiansen (20 July 1931 - 18 May 2024). Phycologia 63(4): 420-422.  PDF 

Buryak, S.D., A.V. Reyes, C.K. West, B.J.L. Jensen, S.A. DuFrane, J H.F.L. Davies, Y. Luo, J.M. Galloway, P.A. Siver, J.A. Westgate, J.R. Reimink, D.G. Pearson, and A.P. White. 2024. Tephra zircon U-Pb geochronology of kimberlite maar sedimentary fills in subarctic Canada: Implications for Eocene paleoclimate and Late Cretaceous paleogeography. The Geological Society of America Bulletin. PDF     

Siver, P.A. and A.M. Lott. 2023. History of the Giraffe Pipe locality inferred from microfossil remains: a thriving freshwater ecosystem near the Arctic Circle during the warm Eocene. Journal of Paleolimnology 97(2): 271-291. PDF  

Siver, P.A. and A.M. Lott. 2023. A first account of Mallomonas specimens representing section Torquatae from the fossil record: descriptions of two species from the Eocene. Fottea 23(2): 246-255. PDF

Siver, P.A. 2023. Tracing lineages of scale-bearing Chrysophyceae over geologic time. Fottea 23(2): 164-176. PDF   

Siver, P.A. and M.I Velez. 2023. The oldest raphe-bearing diatoms: Evidence from the Upper Cretaceous of western and northern Canada. Cretaceous Research 144: 105456. PDF    

Siver, P.A. 2022. The downsizing of gigantic scales and large cells in the genus Mallomonas (Synurales, Chrysophyceae). Scientific Reports 12: 4896. PDF

 Siver, P.A., E. Oddsund and A.M. Lott. 2023. Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic. Phytotaxa 567(1): 21-35. PDF

Grande, T.C., M.V.H. Wilson, A.V. Reyes, S.D. Buryak, A.P. Wolfe, and P.A. Siver. 2022. A Late Cretaceous gonorynchiform fish in the genus Notogoneus from drill core of crater-lake deposits in a kimberlite maar, Northwest Territories, Canada. Cretaceous Research 135. PDF

Galloway, J.M., M. Bringue, S.D. Buryak, A.V. Reyes, C.K. West, and P.A. Siver. 2022. Palynological analyses of maar lake sediments from core samples of Wombat kimberlite pipe, Northwest Territories, Canada. Geologica Survey of Canada, Open File 8864. PDF

Siver, P.A., J. Sibley, A.M. Lott, and L.J. Marsicano. 2021.  Temporal changes in diatom valve diameter indicate shifts in lake trophic status. Journal of Paleolimnology 66: 127-140. PDF

Siver, P.A. 2021. Aulacoseira chockii sp. nov., an early freshwater centric diatom from the Eocene bearing a unique morphology. Diatom Research 36: 253-263. PDF

Siver, P.A. and A. Skogstad. 2021. A first account of the heterotrophic eukaryote Rabdiophrys Rainer from the fossil record and description of a new species from an ancient Eocene Arctic freshwater lake. European Journal of Protistology 82: PDF

Siver, P.A., A.M. Lott and P. Torres. 2020. Abundance and distribution of testate amoebae bearing siliceous plates in freshwater lakes and ponds along the east coast of North America: Importance of water depth and pH. Freshwater Science 39(4): 791-803. PDF

Siver, P.A. 2020. Remarkably preserved cysts of the extinct synurophyte, Mallomonas ampla, uncovered from a 48 Ma freshwater Eocene lake. Nature Scientific Reports 10:5204. PDF

Jadrna, I. P.A. Siver and P. Skaloud. 2020. Morphological evolution of silica scales in the freshwater genus Synura (Stramenopiles). Journal of Phycology. PDF

Skaloud, P., M. Skaloudova, I. Jadrna, H. Bestova, M. Pusztai, D. Kapustin, and P.A. Siver. 2020. Comparing morphological and molecular estimates of species diversity in the freshwater genus Synura (Stramenopiles): a model for understanding diversity of eukaryotic microorganisms. Journal of Phycology 56: 574-591. PDF

Siver, P.A. 2019. An emended description of the freshwater araphid genus Ambistria: a rare diatom from North American Eocene localities. Diatom Research 34: 225-236. PDF

Siver, P.A. 2019. Potential use of chrysophyte cyst morphometrics as a tool for reconstructing ancient lake environments. Nova Hedwigia, Beiheft 148: 101-112. PDF

Siver, P.A., A. Wolfe, M.B. Edlund, J. Sibley, J. Hausman, P. Torres, A.M. Lott. 2019. Aulacoseira giraffensis (Bacillariophyceae), a new diatom species forming massive populations in an Eocene lake. Plant Ecology and Evolution 152: 358-367. PDF

Siver, P.A., A. Skogstad, Y. Nemcova. 2019. Endemism, palaeoendemism and migration: the case for the 'European endemic', Mallomonas intermedia. European Journal of Phycology 54: 1-13. PDF

Jeong, M., J.I. Kim, B.Y. Jo, H.S. Kim, P.A. Siver, and W. Shin. 2019. Surviving the marine environment: two new species of Mallomonas (Synurophyceae). Phycologia 58: 1-11. PDF

Pisera, A., P.A. Siver, O. Mandic. 2019. Miocene siliceous microfossils from the open cast coal mine Gracanica (Bugojno paleolake, Bosnia and Herzegovina) and their significance: a preliminary report. Palaeobiodiversity and Palaeoenvironments. PDF

Siver, P.A., M. Velez, M. Cliveti, and P. Binda. 2018. Early freshwater diatoms from the upper Cretaceous Battle Formation in Western Canada. Palaios 33: 1-10. PDF

Siver, P.A. 2018. Mallomonas skogstadii sp. nov. and M. bakeri sp. nov.: two new fossil species from the middle Eocene representing extinct members of the section heterospinae? Cryptogamie Algologie 39(4): 511-524. PDF

Siver, P.A., L.J. Marsicano, A.M. Lott, S. Wagener, and N. Morris. 2018. Wind induced impacts on hypolimnetic temperature and thermal structure of Candlewood Lake (Connecticut, U.S.A.) from 1985-2015. Geo: Geography and Environment. PDF

Siver, P.A., D. Kapustin, and E. Gusev. 2018. Investigations of two-celled colonies of Synura formerly described as Chrysodidymus with descriptions of two new species. European Journal of Phycology 53(3): 1-11. PDF

Siver, P.A. 2018. Mallomonas aperturae sp. nov. (Synurophyceae) reveals that the complex cell architecture observed on modern synurophytes was well established by the middle Eocene. Phycologia 57(3): 273-279. PDF

Wolfe, A.P., A.V. Reyes, D.L. Royer, D.R. Greenwood, G. Doria, M.H. Gagen, P.A. Siver, and J.A. Westgate. 2017. Middle Eocene CO2 and climate reconstructed from the sediment fill of a subarctic kimberlite maar. Geology 45: 619-622. PDF

Siver, P.A. and A.M. Lott. 2017. The scaled chrysophyte flora in freshwater ponds and lakes from Newfoundland, Canada, and their relationship to environmental variables. Cryptogamie Algologie 38(4): 325-347. PDF

Kohli, P., P.A. Siver, L.J. Marsicano, J.S. Hamer, and A.M. Coffin. 2017. Assessment of long-term trends for management of Candlewood Lake, Connecticut, USA. Lake and Reservoir Management. PDF

Gusev, E.S., P.A. Siver, and W. Shin. 2017. Mallomonas bronchartiana Compere revisited: two new species described from Asia. Cryptogamie, Algologie 38: 3-16. PDF

Gusev, E. and P.A. Siver. 2016. Mallomonas neoampla sp. nov. from Vietnam, a new species that bridges the gap between fossil and modern taxa. Nova Hedwigia 104(4): 521-528. PDF

Siver, P.A., A.P. Wolfe, and M. Edlund. 2016. Fideliacyclus wombatiensis gen. et sp. nov. - a Paleocene non-marine centric diatom from northern Canada with complex frustule architecture. Diatom Research. PDF

Jo, B.Y., J.I. Kim, P. Skaloud, P.A. Siver and W. Shin. 2016. Multigene phylogeny of Synura (Synurophyceae) and descriptions of four new species based on morphological and DNA evidence. European Journal of Phycology 51(4): 413-430. PDF

Siver, P.A. and A.P. Wolfe. 2016. Mallomonas elephantus sp. nov. (Synurophyceae), an extinct fossil lineage bearing unique scales from the Eocene. Nova Hedwigia. PDF

Siver, P.A. and Lott, A.M. 2016. Descriptions of two new species of Synurophyceae from a bog in Newfoundland, Canada: Mallomonas baskettii sp. nov. and Synura kristiansenii sp. nov. Nova Hedwigia 102(3-4): 201-511. PDF

Pisera, A., R. Manconi, P.A. Siver and A.P. Wolfe. 2016. The sponge genus Ephydatia from the high-latitude middle Eocene: environmental and evolutionary significance. Palaontologische Zeitschrift. PDF

Siver, P.A. 2015 Synurophyte Algae.  In: Wehr, J.D., Sheath, R.G., Kociolek, J.P. (Eds.) Freshwater Algae of North America: Ecology and Classification, 2nd edition. Academic Press, Boston, MA, pp. 607-651.

Siver, P.A. 2015. Mallomonas schumachii sp. nov., a fossil Synurophyte bearing large scales described from an Eocene maar lake in Northern Canada. Nova Hedwigia. PDF

Siver, P.A., B.Y. Jo, J.I. Kim, W. Shin, A.M. Lott and A.P. Wolfe. 2015. Assessing the evolutionary history of the class Synurophyceae (Heterokonta) using molecular, morphometric, and paleobiological approaches. American Journal of Botany 102(6): 921-941. PDF

Siver, P.A., Bishop, J., Lott, A.M. and A.P. Wolfe. 2015. Heteropolar eunotioid diatoms (Bacillariophyceae) were common in the North American Arctic during the middle Eocene. Journal of Micropalaeontology. 34(2): 151-163. PDF

Jo, B.Y., W. Shin, H.S. Kim, P.A. Siver and R.A. Andersen. 2013. Phylogeny of the genus Mallomonas (Synurophyceae) and descriptions of five new species on the basis of morphological evidence. Phycologia 52: 266-278. PDF

Barber, A., P.A. Siver and W. Karis. 2013. Euglyphid Testate Amoebae (Rhizaria: Euglyphida) from an Arctic Eocene Waterbody: Evidence of Evolutionary Stasis in Plate Morphology for Over 40 Million Years. Protist 164: 541-555. PDF

Siver, P.A. 2013. Synura cronbergiae sp. nov., a new species described from two Paleogene maar lakes in northern Canada. Nova Hedwigia 97:179-187. PDF

Siver, P.A., A.M. Lott and A.P. Wolfe. 2013. A summary of Synura taxa in early Cenozoic deposits from northern Canada. Nova Hedwigia, Beiheft 142: 181-190. PDF

Siver, P.A. 2013. Variability in scale shape between ancient and modern specimens of Mallomonas insignis. Nova Hedwigia, Beiheft 142: 127-139. PDF

Siver, P.A., A.P. Wolfe, F.J. Rohlf, W. Shin and B.Y. Jo. 2013. Combining geometric morphometrics, molecular phylogeny and micropalaeontology to assess evolutionary patterns in Mallomonas (Synurophyceae: Heterokontophyta). Geobiology 11: 127-138. PDF

Wolfe, A.P. and P.A. Siver. 2013. A hypothesis linking chrysophyte microfossils to lake carbon dynamics on ecological and evolutionary time scales. Global and Planetary Change 111: 189-198. PDF

Pisera, A., P.A. Siver, A.P. Wolfe. 2013. A first account of freshwater potamolepid sponges (Demospongiae, Spongillina, Potamolepidae) from the Middle Eocene: Biogeographic and paleoclimatic implications. Journal of Paleolimnology 87: 373-378. PDF

Siver, P.A. and A.M. Lott. 2012. Fossil species of Mallomonas from an Eocene Maar lake with recessed dome structures: Early attempts at securing bristles to the cell covering? Nova Hedwigia 95: 517-529. PDF

Siver, P.A. and A.M. Lott. 2012. Biogeographic patterns in scaled chrysophytes from the east coast of North America. Freshwater Biology 57: 451-466. PDF

Souffreau, C., H. Verbruggen, A.P. Wolfe, P. Vanormelingen, P.A. Siver, E.J. Cox, D.G. Mann, B. Van de Vijver, K. Sabbe and W. Vyverman. 2011. A time-calibrated multi-gene phylogeny of the diatom genus Pinnularia. Molecular Phylogenetics and Evolution 61: 866-879. PDF

Siver, P.A. and P.B. Hamilton. 2011. The freshwater flora of waterbodies on the Atlantic Coastal Plain. Iconographia Diatomologica Volume 22. Koeltz Scientific Books, Germany, 920pp.

Jo, B.Y., W. Shin, S.M. Boo, H.S. Kim and P.A. Siver. 2011. Studies on ultrastructure and three-gene phylogeny of the genus Mallomonas (Synurophyceae). Journal of Phycology 47: 415-425.

Boo, S.M., H.S. Kim, W. Shin, G.H. Boo, S.M. Cho, B.Y. Jo, J. Kim, J.H. Kim, E.C. Yang, P.A. Siver, A.P. Wolfe, D. Bhattacharya, R.A. Andersen, and H.S. Yoon. 2010. Complex phylogeographic patterns in the freshwater alga Synura provide new insights into ubiquity vs. endemism in microbial eukaryotes. Molecular Ecology 19(19): 4328-4338. PDF

Siver, P.A., A.P. Wolfe, and M.B. Edlund. 2010. Taxonomic descriptions and evolutionary implications of Middle Eocene pinnate diatoms representing the extant genera Oxyneis, Actinella and Nupela (Bacillariophyceae). Plant Ecology and Evolution 143: 340-351. PDF

Siver, P.A. and A.M. Lott. 2010. The scaled chrysophyte flora from the Pinelands National Preserve of southern New Jersey, U.S.A. Nova Hedwigia, Beiheft 136: 167-181. PDF

Hamilton, P.B. and P.A. Siver. 2010. A morphological investigation of Eunotia fennica (Bacillariophyceae) from a freshwater acidic pond in Newfoundland, Canada.  Proceedings of the Academy of Natural Sciences of Philadelphia 160: 89-98. PDF

Siver, P.A. and A.P. Wolfe. 2010. A whole-cell reconstruction of Mallomonas porifera Siver & Wolfe from the Eocene: Implications for the evolution of Chrysophyte cell architecture. Nova Hedwigia, Beiheft 136: 117-126. PDF

Siver, P.A., J.M. Pelczar, A.M. Lott, and A. Pisera. 2010. The Giraffe Pipe database project: A web-based database for siliceous microfossils from a freshwater Eocene waterbody. Nova Hedwigia, Beiheft 136: 325-331. PDF

Sueldo, D. Madanes, N., Siver, P.A., Vigna, M.S. 2010. Distribution of scaled chrysophytes (Chrysophyceae and Synurophyceae) from the Mesopotamia region of Argentina. Nova Hedwigia, Beiheft.136: 181-191.

Stachura-Suchoples, K., J.P. Kociolek and P.A. Siver. 2010. Neidium palpebrum sp. nov., a new diatom from Florida (U.S.A): comparison with N. sacoense Reimer, and some remarks on biogeography. Diatom Research 25(2): 385-395. PDF

Siver, Peter A., Lott, Anne M. and Wolfe, Alexander P. 2009 Taxonomic significance of asymmetrical helmet and lance bristles in the genus Mallomonas (Synurophyceae) and their discovery in Eocene lake sediments. European Journal of Phycology, 44(4): 447-460. PDF

Siver, P.A., Hamilton, P. B. and Pelczar, J. 2009. New species of freshwater diatoms from acidic localities along the Atlantic Coastal Plain of the United States. National Research Council Canada. 87: 409-427. PDF

Wolfe, A.P. and Siver, P.A. 2009. Three extant genera of freshwater thalassiosiroid diatoms from Middle Eocene sediments in northern Canada. Am. J. Bot. 96: 487-497. PDF

Siver, P.A. and Wolfe, A. P. 2009. Tropical ochrophyte algae from the Eocene of northern Canada: a biogeographic response to past global warming. Palaios. 24: 192-198. PDF

Hamilton, P. B. and Siver, P.A. 2008. The type for Fragilaria Lancettula Schumann 1867 and transfer to the genus Punctastriata as P. lancettula (Schum.) Hamilton & Siver comb. nov. Diatom Research 23: 355-365.

Siver, P.A., Hamilton, P.B. and E.A. Morales. 2008. Brevilinea pocosinensis Siver, Hamilton & Morales gen. et. sp. nov., a new diatom (Bacillariophyceae) genus from North Carolina, U.S.A. Phycological Research 56: 141-148

Siver, P.A. and L. Camfield. 2007. Studies on the diatom genus Stenopterobia (Bacillariophyceae) including descriptions of two new species. Can. J. Bot. 85: 822-849. PDF

Siver, P.A., and A.P. Wolfe. 2007. Eunotia spp. (Bacillariophyceae) from Middle Eocene lake sediments and comments on the origin of the diatom raphe. Can. J. Bot. 85: 83-90. PDF

Siver, P.A., Hamilton, P.B., & E.A. Morales. 2007. Notes on the genus Nupela (Bacillariophyceae) including the description of a new species, Nupela scissura sp. nov. and an expanded description of Nupela paludigena. Phycological Research 55: 125-134. PDF

Shayler, H.A. and P.A. Siver. 2006. Key to Freshwater Algae: A web-based tool to enhance understanding of microscopic biodiversity. Journal of Science Education and Technology 15(3): 298-303. PDF

Siver, P. A. & Lott, A. M. 2006. Further observations on the scaled Chrysophycean and Synurophycean flora of the Ocala National Forest, U.S.A. - Nord. J. Bot. 24: 211-233. PDF

Siver, P.A., Morales, E.A., Van de Vijver, B., Smits, M., Hamilton, P.B., Lange-Bertalot, H., & J.J. Hains. 2006. Observations on Fragilaria longifusiformis comb. nov. et nom. nov. (Bacillariophyceae), a widespread planktic diatom documented from North America and Europe. Phycological Research 54: 183-192. PDF

Siver, P.A., Hamilton, P.B. and E.A. Morales. 2006. Two new planktic species of Eunotia (Bacillariophyceae) from freshwater waterbodies in North Carolina, USA. Algological Studies 119: 1-16. PDF

Siver, P.A. and P.B. Hamilton. 2005. A reevaluation of Aulacoseira nygaardii (Camburn) Camburn & D.F. Charles (Bacillariophyceae): based on scanning electron microscopy of type material. Nova Hedwigia 81: 257-265. PDF

Siver, P.A. 2005. Review: Life in glass houses. Journal of Phycology 41; 720.

Siver, P.A. and A.P. Wolfe. 2005. Scaled chrysophytes in Middle Eocene lake sediments from Northwestern Canada, including descriptions of six new species. Nova Hedwigia, Beiheft 128: 295-308. PDF

Lott, A.M. and P.A. Siver. 2005. An inventory of scaled chrysophytes from North Carolina, USA, and their relationships to environmental variables. Nova Hedwigia, Beiheft 128: 211-229. PDF

Siver, P.A., Voloshko, L.N., Gavrilova, O.V. & M.V. Getsen. 2005. The scaled chrysophyte flora of the Bolshezemelskaya tundra (Russia). Nova Hedwigia, Beiheft 128: 125-150. PDF

Siver, P.A. and P.B. Hamilton. 2005. Observations on new and rare species of freshwater diatoms from Cape Cod, Massachusetts, USA. Can. J. Bot. 83: 362-378. PDF

Siver, P.A. and A.P. Wolfe. 2005. Eocene scaled chrysophytes with pronounced modern affinities. Int. J. Plant Sci. 166(3): 533-536. PDF

Shayler, H.A. and P.A. Siver. 2004. Description of a new species of the diatom genus Brachysira (Bacillariophyta), Brachysira gravida sp. nov. from the Ocala National Forest. Florida, USA. Nova Hedwigia 78: 399-409. PDF

Siver, P.A., Aherns, T.D., Hamilton, P.B., Stachura-Suchoples, K. & J.P. Kociolek. 2004. The ecology of diatoms in ponds and lakes on the Cape Cod peninsula, Massachusetts, USA., with special reference to pH. In: Seventeenth International Diatom Symposium 2002. Biopress Limited, Bristol pp. 335-357. PDF

Shayler, H.A. and P.A. Siver. 2004. Biodiversity of the genus Brachysira in the Ocala National Forest, Florida, USA. In: Seventeenth International Diatom Symposium 2002. Biopress Limited, Bristol pp. 309-333. PDF

Stachura-Suchoples, K., Kociolek, J.P. & P.A. Siver. 2004. Neidium pseudodensestriatum sp. nov., a new epiphytic diatom from Florida (USA) and comparison with N. densestriatum (0strup) Krammer. In: Seventeenth International Diatom Symposium 2002. Biopress Limited, Bristol pp. 359-370. PDF

Siver, P.A. and G. Baskette. 2004. A morphological examination of Frustulia (Bacillariophyceae) from the Ocala National Forest, Florida, USA. Can. J. Bot. 82: 629-644. PDF

Hamilton, P.B., Siver, P.A. & C.W. Reimer. 2004. Neidium rudimentarum, a rare species with novel rudimentary canals and areolar openings from the temperate region of North America. Rhodora, 106(925): 33-42. PDF

Vigna, M.S., Alberio, A.S. and P.A. Siver. 2003. Aportes al estudio de las algas Crisofitas escamosas (Chrysophyceae y Synurophyceae) del delta del Rio Parana (Provincia de Buenos Aires, Argentina). Bol. Soc. Argent. Bot. 38: 75-83.

Vigna, M.S. and P.A. Siver. 2003. Biodiversity and biogeographical implications of silica-scaled chrysophytes (Chrysophyceae and Synurophyceae) of the northeast wetlands of Argentina. Arch. Hydrobiol. 158: 359-372. PDF

Siver, P.A., Ricard, R., Goodwin, R. and A.E. Giblin. 2003. Estimating historical in-lake alkalinity generation and its relationship to lake chemistry as inferred from algal microfossils. J. Paleolimnology 29: 179-197. PDF

Siver, P.A. 2003. The Synurophyceae. In : Freshwater Algae of North America. Edited by J. Wehr and B. Sheath. Academic Press. Pages 523-558. PDF

Siver, P.A. 2003. Documenting Pollution Levels in Lakes and Ponds Using an Historical Approach. Proceedings of the 19th Annual Environmental Conference - Tackling Pollution of Inland and Coastal Waters, Sherkin Island Marine Institution, Cork, Ireland.

Siver, P.A. 2003. Mallomonas multiunca var. pocosinensis var. nov. (Synurophyceae) from freshwater localities along coastal sections of North Carolina, U.S.A. Nova Hedwigia 76: 147-156. PDF

Siver, P.A., Hamilton, P.B., Stachura-Suchoples, K & J.P. Kociolek. 2003. Morphological observations of Neidium species with sagittate apices, including the description of N. cape-codii sp. nov. Diatom Research 18: 131-148. PDF

Siver, P.A. 2002. The description of two new taxa in the Section Papillosae of the genus Mallomonas from the Ocala National Forest, Florida, U.S.A. Nord. J. Bot. 22 123-127. PDF

Siver, P.A. 2002. Two new species of Mallomonas (Synurophyceae) from the Ocala National Forest, Florida, U.S.A. Nord. J. Bot. 22: 115-121. PDF

Siver, P.A. 2002. Paleolimnology: Use of siliceous structures of chrysophytes as biological indicators in freshwater systems. In: The Encyclopedia of Environmental Microbiology. G. Bitton, Section Editor. John Wiley. Pages 2317-2327.

Siver, P.A. 2001. Mallomonas nieringii sp. nov., a new species of Synurophyceae from a suite of ponds on Cape Cod, Massachusetts, U.S.A. Nordic Journal of Botany 21: 201-206. PDF

Siver, P.A. and J. Wozniak. 2001. The distribution of lead in Connecticut lakes. Journal of Paleolimnology 26: 1-10. PDF

Siver, P.A. 2001. The scaled chrysophyte flora of Cape Cod, Massachusetts, USA, with special emphasis on lake water chemistry. In: Siver, P.A. and J.L. Wee (eds.), Chrysophytes and related organisms: topics and issues. Beihefte zur Nova Hedwigia 122: 55-74. PDF

Morales, E.A., Siver, P.A. & F.R. Trainor. 2001. Identification of diatoms during ecological assessments: comparison between light and scanning electron microscopy techniques. Proc. Academy of Natural Sciences of Philadelphia 151: 95-103. PDF

Ahrens, T.D. and P.A. Siver. 2000. The physical properties, trophic conditions, and water chemistry of 60 lakes on Cape Cod, Massachusetts, USA. Lake and Reservoir Management 16: 268-280. PDF

Siver, P.A. And J. Hinsch. 2000. The use of interference reflection contrast in the examination of diatom valves. Journal of Phycology 36: 616-620. PDF

Siver, P.A. and A. M. Lott. 2000. Preliminary investigations on the distribution of scaled chrysophytes in Vermont and New Hampshire, USA, lakes and their utility to infer lake water chemistry. Nordic Journal of Botany 20: 233-246. PDF

Siver, P.A. , Lott, A.M., Cash, E., Moss, J. and L.J. Marsicano. 1999. Century changes in Connecticut, U.S.A., lakes as inferred from siliceous algal remains and their relationship to land-use changes. Limnology and Oceanography 44: 1928-1935. PDF

Siver, P.A. 1999. Development of paleolimnological inference models for pH, total nitrogen and specific conductivity based on planktonic diatoms. Journal of Paleolimnology 21: 45-59. PDF

Siver, P.A. and D. Wujek. 1999. Scaled Chrysophyceae and Synurophyceae from Florida, U.S.A.: VI. Observations on the flora from waterbodies in the Ocala National Forest. Nova Hedwigia 68: 75-92. PDF

Siver, P.A. 1999. Morphological observations of synurophycean algae from some acidic habitats, including the description of a sub-specific taxon. Nordic Journal of Botany 19: 121-128. PDF

Siver, P.A. and H. Kling. 1997. Morphological observations of Aulacoseira using scanning electron microscopy. Can. J. Bot. 75: 1807-1835. PDF

Siver, P.A. and M.S. Vigna. 1997. The distribution of scaled chrysophytes in the delta region of the Parana River, Argentina. Nova Hedwigia 64: 421-453. PDF

Kodama, K., Lyons, J.C., Siver, P.A. and A.M. Lott. 1997. A mineral magnetic and scaled chrysophyte paleolimnological study of two northeast Pennsylvania lakes: Records of fly ash deposition, land use change, and paleo rainfall variation. Journal of Paleolimnology 17: 173-189. PDF

Wujek, D.E. and P.A. Siver. 1997. Studies on Florida Chrysophyceae (Paraphysomonadaceae) and Synurophyceae (Mallomonadaceae). V. The flora of north-central Florida. Florida Scientist 60: 21-27.

Siver, P.A. and L.J. Marsicano. 1996. Inferring lake trophic status using scaled chrysophytes. In: Chrysophytes: Progress and New Horizons. Eds. J. Kristiansen and G. Cronberg. Beihefte zur Nova Hedwigia 114: 233-246. PDF

Siver, P.A., Canavan, R.W. IV, Field, C., Marsicano, L.J. and A.M. Lott. 1996. Historical changes in Connecticut lakes over a 55 year period. Journal of Environmental Quality 25: 334-345. PDF

Field, C.K., Siver, P.A. and A.M. Lott. 1996. Estimating the effects of changing land use patterns on Connecticut lakes. Journal of Environmental Quality 25: 325-333. PDF

Siver, P.A. and M.S. Vigna. 1996. Notes on species of Mallomonas in the Series Peronoides. Nordic Journal of Botany 16: 223-231. PDF

Canavan, Richard W. IV and Siver, Peter A. Connecticut Lakes: A Study of the Chemical and Physical Properties of Fifty-six Connecticut Lakes. 1995. Pp.299. Published by the Connecticut College Arboretum, Box 5201 Conn. College, 270 Mohegan Ave., New London, CT 06320-4196. ISBN 1-878899-04-X

Marsicano, L.J., Hartranft, J. L., Siver, P.A., and J.S. Hamer. 1995. An historical account of water quality changes in Candlewood Lake, Connecticut, over a sixty year period using paleolimnology and ten years of monitoring data. Lake and Reservoir Management 11: 15-28. PDF

Canavan, R.W. and P.A. Siver. 1994. Chemical and physical properties of Connecticut lakes. Lake and Reservoir Management 10: 173-186.

Siver, P.A. 1995. The distribution of chrysophytes along environmental gradients: Their use as biological indicators. In: Chrysophyte Algae: Ecology, Phylogeny and Development. Eds: C. Sandgren, J. Smol and J. Kristiansen. Cambridge Press. Pages 232-268.

Siver, P.A. 1994. Mallomonas wujekii, a new species of Synurophyceae from Florida, USA. Nord. J. Bot. 14: 467-471. PDF

Siver, P.A., Lord, W. and D. McCarthy. 1994. Forensic limnology: the use of freshwater algal community ecology to link suspects to an aquatic crime scene in southern New England. Journal of Forensic Science 39: 847-853. PDF

Lott, A.M., Siver, P.A., Marsicano, L.J., Kodama, K.P. and R.E. Moeller. 1994. The paleolimnology of a small waterbody in the Pocono Mountains of Pennsylvania, USA: reconstructing 19th-20th century specific conductivity trends in relation to changing land use. J. Paleolimnology 12: 75-86. PDF

Marsicano, L.J. and P.A. Siver. 1994. Preserving forests, preserving lakes. Connecticut Woodlands 59: 4. PDF

Siver, P.A. 1993. Morphological and ecological characteristics of Chrysosphaerella longispina and C. brevispina (Chrysophyceae). Nord. J. Bot. 13: 343-351. PDF

Siver, P.A. 1993. Inferring lakewater specific conductivity with scaled chrysophytes. Limnol. Oceanogr. 38: 1480-1492. PDF

Siver, P.A. and D.E. Wujek. 1993. Scaled Chrysophyceae and Synurophyceae from Florida: IV. The Flora of Lower Lake Myakka and Lake Tarpon. Florida Scientist 56: 109-117. PDF

Siver, P.A. and L.J. Marsicano. 1993. Mallomonas connensis sp. nov., a new species of Synurophyceae from a small New England lake. Nord. J. Bot. 13: 337-342. PDF

Siver, P.A. and J.P. Smol. 1993. The use of scaled chrysophytes in long term monitoring programs for the detection of changes in lakewater acidity. Water, Air, Soil Pollution 71: 357-376. PDF

Marsicano, L.J. and P.A. Siver. 1993. A paleolimnological assessment of Lake Acidification in five Connecticut lakes. J. Paleolimnology 9: 209-221. PDF

Siver, P.A. and J.S. Hamer. 1992. Seasonal periodicity of Chrysophyceae and Synurophyceae in a small New England lake: implications for paleolimnological research. J. Phycol. 28: 186-198. PDF

Siver, P.A. 1991. The stomatocyst of Mallomonas acaroides v. muskokana (Chrysophyceae). J. of Paleolimnology 5: 11-17. PDF

Siver, P.A. 1991. Improving paleolimnological inference models utilizing scale-bearing siliceous algae: transforming scale counts to cell counts. J. Paleolimnology 5: 219-225.

Siver, P.A. and L.J. Marsicano. 1991. Assessing acidification trends in Connecticut lakes using a paleolimnological approach. CT. Department of Environmental Protection Bulletin, 44 pp. + appendicies.

Siver, P. A. Biology of Mallomonas. 1991. Pp. 229. Published by Klower Academic publishers, P.O. Box 17, 3300 AA Dordrect, The Netherlands. ISBN 0-7923-1166-3

Siver, P.A. 1991. Implications for improving paleolimnological inference models utilizing scale-bearing siliceous algae: transforming scale counts to cell counts. Journal of Paleolimnology 5: 219-225.

Siver, P.A. 1990. Book review of Algae and Human Affairs. Bulletin of Marine Science 46: 253.

Siver, P.A. and J.S. Hamer. 1990. Use of extant populations of scaled chrysophytes for the inference of lakewater pH. Can. J. Fish. Aquat. Sci. 47: 1339-1347. PDF

Siver, P.A., Hamer, J. and H. Kling. 1990. Separation of Mallomonas duerrschmidtiae sp. nov. from M. crassisquama and M. pseudocoronata: Implications for paleolimnological research. J. Phycol. 26: 728-740. PDF

Siver, P.A. and J. R. Glew (1990). The arrangement of scales and bristles on Mallomonas: A proposed mechanism for the formation of the cell covering. Can. J. Bot. 68: 374-380. PDF

Siver, P.A. 1990. A critical literature review of the usefulness of chrysophytes to detect lake chronic or episodic acidification and/or recovery in the context of a long-term monitoring program. 96 pp. EPA #7B1002NASA. U.S. Environmental Protection Agency, Corvalis, OR.

Siver, P.A. 1989. The separation of Mallomonas acaroides v. acaroides and v. muskokana (Synurophyceae) along a pH gradient. Beiheft zur Nova Hedwigia 95: 111-117. PDF

Siver, P.A. and J.S. Hamer. 1989. Multivariate statistical analysis of the factors controlling the distribution of scaled Chrysophytes. Limnol. Oceaogr. 34(2): 368-381. PDF

Siver, P.A. 1989. The distribution of scaled Chrysophytes along a pH gradient. Can. J. Bot. 67: 2120-2130. PDF

Siver, P.A. 1989. Factors controlling the distribution of scaled chrysophytes. Beiheft zur Nova Hedwigia 95: 281.

Siver, P.A. 1988. Distribution of scaled chrysophytes in 17 Adirondack (New York) lakes with special reference to pH. Can. J. Bot. 66: 1391-1403.

Siver, P.A. 1988. A new forma of the common Chrysophyceaen Alga Synura petersenii. Trans. Am. Microsc. Soc. 107(4): 380-385. PDF

Siver, P.A. 1988. Spiniferomonas triangularis sp. nov., a new silica-scaled freshwater flagellate (Chrysophyceae, Paraphysomonadaceae). Br. Phycol. J. 23: 379-383. PDF

Siver, P.A. and A. Skogstad. 1988. Morphological variation and ecology of Mallomonas crassisquama (Chrysophyceae). Nord. J. Bot. 8: 99-107. PDF

Siver, P.A. 1988. Mallomonas retrorsa, a new species of silica-scaled Chrysophyceae with backwards oriented scales. Nord. J Bot. 8: 319-323. PDF

Siver, P.A. 1988. Morphology and ecology of Mallomonas galeiformis (Chrysophyceae), a potentially useful paleolimnological indicator. Trans. Am. Microsc. Soc. 107(2): 152-161. PDF

Siver, P.A. 1988. The distribution and ecology of Spiniferomonas (Chrysophyceae) in Connecticut (USA). Nord. J. Bot. 8: 205-212. PDF

Siver, P.A. 1987. The distribution and variation of Synura species (Chrysophyceae) in Connecticut (USA). Nord. J. Bot. 7: 107-116. PDF

Siver, P.A. 1987. Spiniferomonas breakneckii, a new species of freshwater Chrysophyceae. Br. phycol. J. 22:97-100. PDF

Siver, P.A. 1987. Distribution of scaled chrysophytes in 17 Adirondack (New York) lakes with special reference to pH. Can. J. Bot. 66: 1391-1403. PDF

Siver, P.A., Coleman, A., Benson, G. and J. Simpson. 1986. The effect of winter drawdown on macrophyte densities in Candlewood Lake, CT. U.S.A. In: Lake and Reservoir Management. Vol II. Proc. North American Lake Management Society, pp 69-73.

Freeda, S. and P.A. Siver. 1986. Seasonal succession and vertical distribution of phytoplankton in Candlewood Lake, CT. Rhodora 88: 331-346.PDF

Siver, P.A. and J.S. Chock. 1986. Phytoplankton dynamics in a chrysophycean lake. In: Chrysophytes aspects and problems. Cambridge University Press. PDF

Siver, P.A., A.M. Coleman, G.A. Benson and J.T. Simpson. 1986. The effects of winter drawdown on macrophytes in Candlewood Lake, Connecticut. Lake and Reservoir Management 2: 69-73. PDF

Siver, P.A. and J. Chock. 1985. The chrysophyte flora of Pennsylvania. I. Lake Lacawac. Proc. Pa. Acad. Sci. 59 (1): 15-17.PDF

Freeda, S. and P.A. Siver. 1983. The interaction of light, temperature, and nitrogen concentration on algal competition on several green algae. Proc. Pa. Acad. Sci., 57 (1): 158-164.

Nerozzi, A. and P.A. Siver. 1983. Periphytic community analysis in a small oligotrophic lake. Proc. Pa. Acad. Sci., 57 (2): 138-142.PDF

Siver, P.A. and F. R. Trainor. 1983. Effect of growth rate on unicell production in two strains of Scenedesmus (Chlorophyta). Phycologia 22: 127-31.PDF

Siver, P.A. 1983. A new thermal gradient device for culturing algae. Br. Phycol. J. 18: 158-164.PDF

Freeda, S.J. and P.A. Siver. 1983. Competition between two planktonic green algae Scenedesmus strain 170 and Golenkinia sp.: the effects of temperature and nitrogen concentration gradients. Proceedings of the Pennsylvania Academy of Science 57: 158-164.

Siver, P.A. and S.J. Freeda. 1982. The interaction of growth rate and cell cycle on the number of cells in a Scenedesmus coenobium. Proceedings of the Pennsylvania Academy of Science 56: 133-137.

Siver, P.A., Feldman, D. and R. Wallace. 1981. Competition between the planktonic algae Scenedesmus strain 170 and Golenkinia sp. in uni and bialgal culture. Proc. Pa. Acad.PDF

Siver, P.A. 1980. Microattachment patterns of diatoms on leaves of Potamogeton robbinsii Oakes. Trans. Amer. Micros. Soc. 99 (2): 217-20.PDF

Siver, P.A. and F. Trainor. 1981. Morphological control and physiology of Scendesmus strain 170. Phycologia 20: 1-11.PDF

Siver, P.A. 1978. Development of diatom communities on Potamogeton robbinsii Oakes. Rhodora 80: 417-30.

Siver, P.A. 1977. Comparison of attached diatom communities on natural and artificial substrates. J. Phycol. 13: 402-6.PDF