Northern Rocky Mountain Science Center (NOROCK)


We hope you will enjoy learning about the variety of ecosystems and species we are studying throughout the United States. We are part of the Northwest Region of the USGS and our scientists work on diverse issues such as wildlife health, invasive species, climate, endangered species and much more. Click on Science to begin exploring the places we go and the species and landscapes we study.



EcoLunch is s a forum for those in the environmental sciences to present their current and past work. Click below for upcoming talks!

Wet Heathland Plants

NOROCK in the News

NOROCK in the News

Recent news and media featuring NOROCK Science. Click below for our most recent news feature.

How Species Deal


Profile of the North Fork of the Flathead River, Montana.
September 6, 2017

A new U.S. Geological Survey study provides a larger window into the future for understanding how seasonal stream temperatures may change in one of the most ecologically diverse ecosystems in North America – the Crown of the Continent Ecosystem, USA and Canada.

Ready to remove from the trap
August 16, 2017

As part of ongoing efforts required under the 2016 Yellowstone Grizzly Bear Conservation Strategy to monitor the population of grizzly bears in the Yellowstone Ecosystem, the Interagency Grizzly Bear Study Team (IGBST) traps and monitors grizzly bears for research and monitoring purposes. Here you will find trapping notifications for the 2017 field season.

An American pika collects grass and flowers to stockpile its winter food supplies.
July 12, 2017

A new study by the U.S. Geological Survey and its partners has identified situations and conditions where some animals display behavioral flexibility – the ability to rapidly change behavior in response to short – or long-term environmental changes such as climate variability. 


Year Published: 2017

No evidence for ecological segregation protecting native trout from invasive hybridization

We appreciate the comments of Young et al. (2017) on our recentpaper (Muhlfeld et al., 2017) concerning spatiotemporal dynamics ofhybridization between native westslope cutthroat trout (Oncor-hynchus clarkii lewisi; WCT) and introduced coastal rainbow trout(Oncorhynchus mykiss irideus; RBT). Nevertheless, we believe there isno evidence for “...

Kovach, Ryan; Muhlfeld, Clint C.; Al-Chokhachy, Robert K.; Amish, Stephen J.; Kershner, Jeffrey L.; Leary, Robb F.; Lowe, Winsor H.; Luikart, Gordon; Matson, Phil; Schmetterling, David; Shepard, Bradley; Westley, Peter A. H.; Whited, Diane; Whiteley, Andrew R.; Allendorf, Fred W.
Kovach, Muhlfeld et al. 2017. Global Change Biology. No evidence for ecological segregation protecting native trout from invasive hybridization.

Year Published: 2017

Contact and contagion: Probability of transmission given contact varies with demographic state in bighorn sheep

Understanding both contact and probability of transmission given contact are key to managing wildlife disease. However, wildlife disease research tends to focus on contact heterogeneity, in part because the probability of transmission given contact is notoriously difficult to measure. Here, we present a first step towards empirically investigating...

Manlove, Kezia R.; Cassirer, E. Frances; Plowright, Raina K.; Cross, Paul C.; Hudson, Peter J.

Year Published: 2017

A global multiproxy database for temperature reconstructions of the Common Era

Reproducible climate reconstructions of the Common Era (1 CE to present) are key to placing industrial-era warming into the context of natural climatic variability. Here we present a community-sourced database of temperature-sensitive proxy records from the PAGES2k initiative. The database gathers 692 records from 648 locations, including all...

Emile-Geay, Julian; McKay, Nicholas P.; Kaufman, Darrell S.; von Gunten, Lucien; Wang, Jianghao; Anchukaitis, Kevin J.; Abram, Nerilie J.; Addison, Jason A.; Curran, Mark A.J.; Evans, Michael N.; Henley, Benjamin J.; Hao, Zhixin; Martrat, Belen; McGregor, Helen V.; Neukom, Raphael; Pederson, Gregory T.; Stenni, Barbara; Thirumalai, Kaustubh; Werner, Johannes P.; Xu, Chenxi; Divine, Dmitry V.; Dixon, Bronwyn C.; Gergis, Joelle; Mundo, Ignacio A.; Nakatsuka, T.; Phipps, Steven J.; Routson, Cody C.; Steig, Eric J.; Tierney, Jessica E.; Tyler, Jonathan J.; Allen, Kathryn J.; Bertler, Nancy A. N.; Bjorklund, Jesper; Chase, Brian M.; Chen, Min-Te; Cook, Ed; de Jong, Rixt; DeLong, Kristine L.; Dixon, Daniel A.; Ekaykin, Alexey A.; Ersek, Vasile; Filipsson, Helena L.; Francus, Pierre; Freund, Mandy B.; Frezzotti, M.; Gaire, Narayan P.; Gajewski, Konrad; Ge, Quansheng; Goosse, Hugues; Gornostaeva, Anastasia; Grosjean, Martin; Horiuchi, Kazuho; Hormes, Anne; Husum, Katrine; Isaksson, Elisabeth; Kandasamy, Selvaraj; Kawamura, Kenji; Koc, Nalan; Leduc, Guillaume; Linderholm, Hans W.; Lorrey, Andrew M.; Mikhalenko, Vladimir; Mortyn, P. Graham; Motoyama, Hideaki; Moy, Andrew D.; Mulvaney, Robert; Munz, Philipp M.; Nash, David J.; Oerter, Hans; Opel, Thomas; Orsi, Anais J.; Ovchinnikov, Dmitriy V.; Porter, Trevor J.; Roop, Heidi; Saenger, Casey; Sano, Masaki; Sauchyn, David; Saunders, K.M.; Seidenkrantz, Marit-Solveig; Severi, Mirko; Shao, X.; Sicre, Marie-Alexandrine; Sigl, Michael; Sinclair, Kate; St. George, Scott; St. Jacques, Jeannine-Marie; Thamban, Meloth; Thapa, Udya Kuwar; Thomas, E.; Turney, Chris; Uemura, Ryu; Viau, A.E.; Vladimirova, Diana O.; Wahl, Eugene; White, James W. C.; Yu, Z.; Zinke, Jens
Emile-Geay J, Mckay NP, Kaufman DS, Gunten Von L, Wang J, Anchukaitis KJ, Abram NJ, Addison JA, Curran MAJ, Evans MN, Henley BJ, Hao Z, Martrat B, McGregor HV, Neukom R, Pederson GT, Stenni B, Thirumalai K, Werner JP, Xu C, Divine DV, Dixon BC, Gergis J, Mundo IA, Nakatsuka T, Phipps SJ, Routson CC, Steig EJ, Tierney JE, Tyler JJ, Allen KJ, Bertler NAN, Björklund J, Chase BM, Chen M-T, Cook E, de Jong R, Delong KL, Dixon DA, Ekaykin AA, Ersek V, Filipsson HL, Francus P, Freund MB, Frezzotti M, Gaire NP, Gajewski K, Ge Q, Goosse H, Gornostaeva A, Grosjean M, Horiuchi K, Hormes A, Husum K, Isaksson E, Kandasamy S, Kawamura K, Kilbourne KH, Koç N, Leduc G, Linderholm HW, Lorrey AM, Mikhalenko V, Mortyn PG, Motoyama H, Moy AD, Mulvaney R, Munz PM, Nash DJ, Oerter H, Opel T, Orsi AJ, Ovchinnikov DV, Porter TJ, Roop HA, Saenger C, Sano M, Sauchyn D, Saunders KM, Seidenkrantz M-S, Severi M, Shao X, Sicre M-A, Sigl M, Sinclair K, St George S, St-Jacques J-M, Thamban M, Kuwar Thapa U, Thomas ER, Turney C, Uemura R, Viau AE, Vladimirova DO, Wahl ER, White JWC, Yu Z, Zinke J. 2017. A global multiproxy database for temperature reconstructions of the Common Era. Scientific Data. The Author(s) SN - 4: 170088. DOI: 10.1038/sdata.2017.88.