| Geomicrobiology of caves: a review D E. Northup, Kathleen H. Lavoie Geomicrobiology journal 18 (3), 199-222, 2001 | 511 | 2001 |
| Geomicrobiology in cave environments: past, current and future perspectives HA Barton, DE Northup Journal of cave and karst studies 69 (1), 163-178, 2007 | 401 | 2007 |
| Microbiology and geochemistry in a hydrogen-sulphide-rich karst environment LD Hose, AN Palmer, MV Palmer, DE Northup, PJ Boston, HR DuChene Chemical Geology 169 (3-4), 399-423, 2000 | 316 | 2000 |
| Cave biosignature suites: microbes, minerals, and Mars PJ Boston, MN Spilde, DE Northup, LA Melim, DS Soroka, LG Kleina, ... Astrobiology 1 (1), 25-55, 2001 | 308 | 2001 |
| Diverse microbial communities inhabiting ferromanganese deposits in Lechuguilla and Spider Caves DE Northup, SM Barns, LE Yu, MN Spilde, RT Schelble, KE Dano, ... Environmental Microbiology 5 (11), 1071-1086, 2003 | 286 | 2003 |
| Bacteria, fungi and biokarst in lechuguilla cave, carlsbad caverns national park, new mexico KI Cunningham, DE Northup, RM Pollastro, WG Wright, EJ LaRock Environmental Geology 25, 2-8, 1995 | 220 | 1995 |
| Changes in nitrogen-fixing and ammonia-oxidizing bacterial communities in soil of a mixed conifer forest after wildfire CM Yeager, DE Northup, CC Grow, SM Barns, CR Kuske Applied and environmental microbiology 71 (5), 2713-2722, 2005 | 191 | 2005 |
| Lava cave microbial communities within mats and secondary mineral deposits: implications for life detection on other planets DE Northup, LA Melim, MN Spilde, JJM Hathaway, MG Garcia, M Moya, ... Astrobiology 11 (7), 601-618, 2011 | 178 | 2011 |
| Evidence for geomicrobiological interactions in Guadalupe caves DE Northup, CN Dahm, LA Melim, MN Spilde, LJ Crossey, KH Lavoie, ... Journal of Cave and Karst Studies 62 (2), 80-90, 2000 | 166 | 2000 |
| Characteristics of clinical information-searching: investigation using critical incident technique DE Northup, M Moore-West, B Skipper, SR Teaf Academic Medicine 58 (11), 873-81, 1983 | 161 | 1983 |
| Geomicrobiology of cave ferromanganese deposits: a field and laboratory investigation MN Spilde, DE Northup, PJ Boston, RT Schelble, KE Dano, LJ Crossey, ... Geomicrobiology Journal 22 (3-4), 99-116, 2005 | 145 | 2005 |
| Molecular phylogenetic analysis of a bacterial community in Sulphur River, Parker Cave, Kentucky ER Angert, DE Northup, AL Reysenbach, AS Peek, BM Goebel, NR Pace American Mineralogist 83 (11), 1583-1592, 1998 | 139 | 1998 |
| Microbial ecology LL Barton, DE Northup John Wiley & Sons, 2011 | 128 | 2011 |
| Actinobacterial diversity in volcanic caves and associated geomicrobiological interactions C Riquelme, JJ Marshall Hathaway, MLN Enes Dapkevicius, AZ Miller, ... Frontiers in microbiology 6, 1342, 2015 | 124 | 2015 |
| Fundamental research questions in subterranean biology S Mammola, IR Amorim, ME Bichuette, PAV Borges, N Cheeptham, ... Biological Reviews 95 (6), 1855-1872, 2020 | 102 | 2020 |
| Comparison of bacterial diversity in Azorean and Hawai'ian lava cave microbial mats JJM Hathaway, MG Garcia, MM Balasch, MN Spilde, FD Stone, ... Geomicrobiology journal 31 (3), 205-220, 2014 | 98 | 2014 |
| Comparison of bacterial communities from lava cave microbial mats to overlying surface soils from Lava Beds National Monument, USA KH Lavoie, AS Winter, KJH Read, EM Hughes, MN Spilde, DE Northup PloS one 12 (2), e0169339, 2017 | 93 | 2017 |
| Diversity of rock varnish bacterial communities from Black Canyon, New Mexico DE Northup, JR Snider, MN Spilde, ML Porter, JL van de Kamp, ... Journal of Geophysical Research: Biogeosciences 115 (G2), 2010 | 93 | 2010 |
| History of the sulfuric acid theory of speleogenesis in the Guadalupe Mountains, New Mexico DH Jagnow, CA Hill, DG Davis, HR DuChene, KI Cunningham, ... Journal of Cave and Karst Studies 62 (2), 54-59, 2000 | 91 | 2000 |
| Mars extant life: What's next? Conference report BL Carrier, DW Beaty, MA Meyer, JG Blank, L Chou, S DasSarma, ... Astrobiology 20 (6), 785-814, 2020 | 74 | 2020 |