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Alan Knapp

Alan Knapp

Professor, Department of Biology, Colorado State University

aknapp@mail.colostate.edu

970-491-7010

Department of Biology
Colorado State University
1878 Campus Delivery
Fort Collins, CO 80523

Titles

  • Professor, Department of Biology, Colorado State University

Education

  • MS, Botany, University of Wyoming-Laramie, 1981
  • BS, Biology (high honors), Idaho State University, 1978
  • PhD, Botany, University of Wyoming-Laramie

External Links

Journal Articles

2020

Felton, A. J., I. J. Slette, M. D. Smith and A. K. Knapp. 2020. Precipitation amount and event size interact to reduce ecosystem functioning during dry years in a mesic grassland. Global Change Biology 36(2):658–668. DOI: 10.1111/gcb.14789. (link )

Slette, I. J., M. D. Smith, A. K. Knapp, S. M. Vicente-Serrano, J. J. Camarero and S. Begueria. 2020. Standardized metrics are key for assessing drought severity. Global Change Biology 26(2):e1-e3. DOI: 10.1111/gcb.14899. (link )

Smith, M. D., S. E. Koerner, A. K. Knapp, M. L. Avolio, F. A. Chaves, E. M. Denton, J. D. Dietrich, D. J. Gibson, J. E. Gray, A. M. Hoffman, D. L. Hoover, K. J. Komatsu, A. Silletti, K. R. Wilcox, Q. Yu and J. M. Blair. 2020. Mass ratio effects underlie ecosystem responses to environmental change. Journal of Ecology 108(3):855-964. DOI: 10.1111/1365-2745.13330. (link )

Wilcox, K. R., S. E. Koerner, D. L. Hoover, A. K. Borkenhagen, S. L. Collins, A. M. Hoffman, K. P. Kirkman, A. K. Knapp, T. Strydom, D. I. Thompson and M. D. Smith. 2020. Rapid recovery of ecosystem function following extreme drought in a South African savanna grassland. Ecology 101(4):e02983. DOI: 10.1002/ecy.2983. (link )

2019

Caplan, J. S., D. Gimenez, D. R. Hirmas, N. A. Brunsell, J. M. Blair and A. K. Knapp. 2019. Decadal-scale shifts in soil hydraulic properties as induced by altered precipitation. Science Advances 5(9):eaau6635. DOI: 10.1126/sciadv.aau6635. (link )

De Boeck, H. J., J. M. Bloor, R. Aerts, M. Bahn, C. Beier, B. A. Emmett, M. Estiarte, J. M. Grunzweig, A. H. Halbritter, P. Holub, A. Jentsch, K. Klem, J. Kreyling, G. Kroel-Dulay, K. Steenberg Larsen, A. Milcu, J. Roy, B. D. Sigurdsson, M. D. Smith, M. Sternberg, V. Vandvik, T. Wohlgemuth, I. Nijs and A. K. Knapp. 2019. Understanding ecosystems of the future will require more than realistic climate change experiments – A response to Korell et al.. Global Change Biology 26(2):e6-e7. DOI: 10.1111/gcb.14854. (link )

Komatsu, K., M. L. Avolio, N. P. Lemoine, F. Isbell, E. Grman, G. R. Houseman, S. E. Koerner, D. S. Johnson, K. R. Wilcox, J. M. Alatalo, J. P. Anderson, R. Aerts, S. G. Baer, A. H. Baldwin, J. Bates, C. Beierkuhnlein, R. T. Belote, J. Blair, J. M. Bloor, P. J. Bohlen, E. W. Bork, E. H. Boughton, W. D. Bowman, A. J. Britton, J. F. Cahill Jr, E. Chaneton, N. R. Chiariello, J. Cheng, S. L. Collins, J. H. Cornelissen, G. Du, A. Eskelinen, J. Fim, B. Foster, L. Gough, K. Gross, L. M. Hallett, X. Han, H. Harmens, M. J. Hovenden, A. Jagerbrand, A. Jentsch, C. Kern, K. Klanderud, A. K. Knapp, J. Kreyling, W. Li, Y. Luo, R. L. McCulley, J. R. McLaren, J. P. Megonigal, J. W. Morgan, V. G. Onipchenko, S. C. Pennings, J. Prevey, J. N. Price, P. B. Reich, C. H. Robinson, F. L. Russell, O. E. Sala, E. W. Seabloom, M. D. Smith, N. A. Soudzilovskaia, L. Souza, K. N. Suding, K. B. Suttle, T. Svejcar, D. Tilman, P. M. Tognetti, R. Turkington, S. R. White, Z. Xu, L. Yahdjian, Q. Yu, P. Zhang and Y. Zhang. 2019. Global change effects on plant communities are magnified by time and the number of global change factors imposed. Proceedings of the National Academy of Sciences of the United States of America 116(36):17867-17873. DOI: 10.1073/pnas.1819027116. (link )

2018

Asbjornsen, H., J. L. Campbell, K. A. Jennings, M. A. Vadeboncoeur, C. McIntire, P. H. Templer, R. P. Phillips, T. L. Bauerle, M. C. Cietze, S. D. Frey, P. M. Groffman, R. Guerrieri, P. J. Hanson, E. P. Kelsey, A. K. Knapp, N. G. McDowell, P. Meir, K. A. Novick, S. V. Ollinger, W. T. Pockman, P. G. Schaberg, S. D. Wullschleger, M. D. Smith and L. E. Rustad. 2018. Guidelines and considerations for designing field experiments simulating precipitation extremes in forest ecosystems. Methods in Ecology and Evolution 9(12):2310-2325. DOI: 10.1111/2041-210X.13094. (link )

Felton, A. J., A. K. Knapp and M. D. Smith. 2018. Carbon exchange responses of a mesic grassland to an extreme gradient of precipitation. Oecologia 1-12. DOI: 10.1007/s00442-018-4284-2. (link )

Griffin-Nolan, R. J., J. A. Bushey, C. J. Carroll, A. Challis, J. Chieppa, M. Garbowski, A. M. Hoffman, I. J. Slette, D. Spitzer, D. Zambonini, T. W. Ocheltree, D. T. Tissue and A. K. Knapp. 2018. Trait selection and community weighting are key to understanding ecosystem responses to changing precipitation regimes. Functional Ecology 32(7):1746-1756. DOI: 10.1111/1365-2435.13135. (link )

Griffin-Nolan, R. J., C. J. Carroll, E. M. Denton, M. K. Johnston, S. L. Collins, M. D. Smith and A. K. Knapp. 2018. Legacy effects of a regional drought on aboveground net primary production in six central US grasslands. Plant Ecology 219(5):505-515. DOI: 10.1007/s11258-018-0813-7. (link )

Hoffman, A. M., M. L. Avolio, A. K. Knapp and M. D. Smith. 2018. Codominant grasses differ in gene expression under experimental climate extremes in native tallgrass prairie. Peer J 6:e4394. DOI: 10.7717/peerj.4394. (link )

Hopping, K. A., A. K. Knapp, T. Dorji and J. A. Klein. 2018. Warming and land use change concurrently erode ecosystem services in Tibet. Global Change Biology 24(11):5534-5548. DOI: 10.1111/gcb.14417. (link )

Hu, Z., Q. Guo, S. Li, S. Piao, A. K. Knapp, P. Ciais, X. Li and G. Yu. 2018. Shifts in the dynamics of productivity signal ecosystem state transitions at the biome‐scale. Ecology Letters 21(10):1457-1466. DOI: 10.1111/ele.13126. (link )

Knapp, A. K., C. J. Carroll, R. J. Griffin-Nolan, I. J. Slette, F. A. Chaves, L. E. Baur, A. J. Felton, J. E. Gray, A. M. Hoffman, N. P. Lemoine, W. Mao, A. K. Post and M. D. Smith. 2018. A reality check for climate change experiments: Do they reflect the real world?. Ecology 99(10):2145-2151. DOI: 10.1002/ecy.2474. (link )

Koerner, S. E., M. D. Smith, D. E. Burkepile, N. Hanan, M. L. Avolio, S. L. Collins, A. K. Knapp, N. P. Lemoine, E. J. Forrestel, S. Eby, D. I. Thompson, G. A. Aguado-Santacruz, J. P. Anderson, T. M. Anderson, A. Angassa, S. Bagchi, E. S. Bakker, G. Bastin, L. E. Baur, E. A. Beever, P. J. Bohlen, E. H. Boughton, D. Canestro, A. Cesa, E. Chaneton, J. Cheng, C. M. D'Antonio, C. Deleglise, F. Dembélé, J. Dorrough, D. J. Eldridge, B. Fernandez-Going, S. Fernández-Lugo, L. H. Fraser, B. Freedman, G. García-Salgado, J. R. Goheen, L. Guo, S. Husheer, M. Karembé, J. M. Knops, T. Kraaij, A. Kulmatiski, M. Kytöviita, F. Lezama, G. Loucougaray, A. Loydi, D. G. Milchunas, S. J. Milton, J. W. Morgan, C. Moxham, K. C. Nehring, H. Olff, T. M. Palmer, S. Rebollo, C. Riginos, A. C. Risch, M. Rueda, M. Sankaran, T. Sasaki, K. A. Schoenecker, N. L. Schultz, M. Schütz, A. Schwabe, F. Siebert, C. Smit, K. A. Stahlheber, C. Storm, D. J. Strong, J. Su, Y. V. Tiruvaimozhi, C. Tyler, J. Val, M. L. Vandegehuchte, K. E. Veblen, L. T. Vermeire, D. Ward, J. Wu, T. P. Young, Q. Yu and T. J. Zelikova. 2018. Change in dominance determines herbivore effects on plant biodiversity. Nature Ecology & Evolution 2(Dec):1925-1932. DOI: 10.1038/s41559-018-0696-y. (link )

Langley, J. A., S. K. Chapman, K. J. La Pierre, M. L. Avolio, W. D. Bowman, D. S. Johnson, F. Isbell, K. R. Wilcox, B. L. Foster, M. J. Hovenden, A. K. Knapp, S. E. Koerner, C. J. Lortie, J. P. Megonigal, P. C. Newton, P. B. Reich, M. D. Smith, K. B. Suttle and D. Tilman. 2018. Ambient changes exceed treatment effects on plant species abundance in global change experiments. Global Change Biology 24(12):5668-5679. DOI: 10.1111/gcb.14442. (link )

Lemoine, N. P., R. J. Griffin-Nolan, A. D. Lock and A. K. Knapp. 2018. Drought timing, not previous drought exposure, determines sensitivity of two shortgrass species to water stress. Oecologia 188(4):965-975. DOI: 10.1007/s00442-018-4265-5. (link )

Luo, W., C. Xu, W. Ma, X. Yue, X. Liang, X. Zuo, A. K. Knapp, M. D. Smith, J. Sardans, F. A. Dijkstra, J. Penuelas, Y. Bai, Z. Wang, Q. Yu and X. Han. 2018. Effects of extreme drought on plant nutrient uptake and resorption in rhizomatous vs bunchgrass-dominated grasslands. Oecologia 188(2):633-643. DOI: 10.1007/s00442-018-4232-1. (link )

Luo, W., X. Zuo, W. Ma, C. Xu, A. Li, Q. Yu, A. K. Knapp, R. Tognetti, F. A. Dijkstra, M. Li, G. Han, Z. Wang and X. Han. 2018. Differential responses of canopy nutrients to experimental drought along a natural aridity gradient. Ecology 99(10):2230-2239. DOI: 10.1002/ecy.2444. (link )

Ochoa-Hueso, R., S. L. Collins, M. Delgado-Baquerizo, K. Hamonts, W. T. Pockman, R. L. Sinsabaugh, M. D. Smith, A. K. Knapp and S. A. Power. 2018. Drought consistently alters the composition of soil fungal and bacterial communities in grasslands from two continents. Global Change Biology 24(7):2818-2827. DOI: 10.1111/gcb.14113. (link )

Wu, D., P. Ciais, N. Viovy, A. K. Knapp, K. Wilcox, M. Bahn, M. D. Smith, S. Vicca, S. Fatichi, J. Zscheischler, Y. He, X. Li, A. Ito, A. Arneth, A. Harper, A. Ukkola, A. Paschalis, B. Poulter, C. Peng, D. Ricciuto, D. Reinthaler, G. Chen, H. Tian, H. Genet, J. Mao, J. Ingrisch, J. E. Nabel, J. Pongratz, L. R. Boysen, M. Kautz, M. Schmitt, P. Meir, Q. Zhu, R. Hasibeder, S. Sippel, S. R. Dangal, S. Sitch, X. Shi, Y. Wang, Y. Luo, Y. Luo and S. Piao. 2018. Asymmetric responses of primary productivity to altered precipitation simulated by ecosystem models across three long-term grassland sites. Biogeosciences 15:3421-3437. DOI: 10.5194/bg-15-3421-2018. (link )

Zhang, H., X. Lü, A. K. Knapp, H. Hartmann, E. Bai, X. Wang, Z. Wang, X. Wang, Q. Yu and X. Han. 2018. Facilitation by leguminous shrubs increases along a precipitation gradient. Functional Ecology 32(1):203-213. DOI: 10.1111/1365-2435.12941. (link )

2017

Burkepile, D. E., R. W. Fynn, D. I. Thompson, N. P. Lemoine, S. E. Koerner, S. Eby, N. Hagenah, K. R. Wilcox, S. L. Collins, K. P. Kirkman, A. K. Knapp and M. D. Smith. 2017. Herbivore size matters for productivity–richness relationships in African savannas. Journal of Ecology 105(3):674-686. DOI: 10.1111/1365-2745.12714. (link )

Chen, M., W. J. Parton, S. J. Del Grosso, M. D. Hartman, K. A. Day, C. J. Tucker, J. D. Derner, A. K. Knapp, W. K. Smith, D. Ojima and W. Gao. 2017. The signature of sea surface temperature anomalies on the dynamics of semiarid grassland productivity. Ecosphere 8(12):e02069. DOI: 10.1002/ecs2.2069. (link )

Denton, E. M., J. D. Dietrich, M. D. Smith and A. K. Knapp. 2017. Drought timing differentially affects above- and belowground productivity in a mesic grassland. Plant Ecology 218(3):317-328. DOI: 10.1007/s11258-016-0690-x. (link )

Hoover, D. L., A. K. Knapp and M. D. Smith. 2017. Photosynthetic responses of a dominant C4 grass to an experimental heat wave are mediated by soil moisture. Oecologia 183(1):303-313. DOI: 10.1007/s00442-016-3755-6. (link )

Knapp, A. K., M. L. Avolio, C. Beier, C. J. Carroll, S. L. Collins, J. S. Dukes, L. H. Fraser, R. J. Griffin-Nolan, D. L. Hoover, A. Jentsch, M. E. Loik, R. P. Phillips, A. K. Post, O. E. Sala, I. J. Slette, L. Yahdjian and M. D. Smith. 2017. Pushing precipitation to the extremes in distributed experiments: Recommendations for simulating wet and dry years. Global Change Biology 23(51774-1782):. DOI: 10.1111/gcb.13504. (link )

Knapp, A. K., P. Ciais and M. D. Smith. 2017. Reconciling inconsistencies in precipitation–productivity relationships: Implications for climate change. New Phytologist 214(1):41-47. DOI: 10.1111/nph.14381. (link )

Smith, M. D., K. R. Wilcox, S. A. Power, D. T. Tissue and A. K. Knapp. 2017. Assessing community and ecosystem sensitivity to climate change – toward a more comparative approach. Journal of Vegetation Science 28(2):235-237. DOI: 10.1111/jvs.12524. (link )

Wilcox, K. R., Z. Shi, L. A. Gherardi, N. P. Lemoine, S. E. Koerner, D. L. Hoover, E. W. Bork, K. M. Byrne, J. F. Cahill Jr, S. L. Collins, S. Evans, A. K. Gilgen, P. Holub, L. Jiang, A. K. Knapp, D. LeCain, J. Liang, P. Garcia-Palacios, J. Penuelas, W. T. Pockman, M. D. Smith, S. Sun, S. R. White, L. Yahdjian, K. Zhu and Y. Luo. 2017. Asymmetric responses of primary productivity to precipitation extremes: A synthesis of grassland precipitation manipulation experiments. Global Change Biology 23(10):4376-4385. DOI: 10.1111/gcb.13706. (link )

Wilcox, K. R., A. T. Tredennick, S. E. Koerner, E. Grman, L. M. Hallett, M. L. Avolio, K. J. La Pierre, G. R. Houseman, F. Isbell, D. S. Johnson, J. M. Alatalo, A. H. Baldwin, E. W. Bork, E. H. Boughton, W. D. Bowman, A. J. Britton, J. F. Cahill Jr, S. L. Collins, G. Du, A. Eskelinen, L. Gough, A. Jentsch, C. Kern, K. Klanderud, A. K. Knapp, J. Kreyling, Y. Luo, J. R. McLaren, P. Megonigal, V. G. Onipchenko, J. Prevey, J. N. Price, C. H. Robinson, O. E. Sala, M. D. Smith, N. A. Soudzilovskaia, L. Souza, D. Tilman, S. R. White, Z. Xu, L. Yahdjian, Q. Yu, P. Zhang and Y. Zhang. 2017. Asynchrony among local communities stabilizes ecosystem function of meta-communities. Ecology Letters 20(12):1534-1545. DOI: 10.1111/ele.12861. (link )

2015

Knapp, A. K., D. L. Hoover, K. R. Wilcox, M. L. Avolio, S. E. Koerner, K. J. La Pierre, M. E. Loik, O. E. Sala and M. D. Smith. 2015. Characterizing differences in precipitation regimes of extreme wet and dry years: Implications for climate change experiments. Global Change Biology 21(7):2624-2633. DOI: 10.1111/gcb.12888. (link )

2014

Levy, O., B. A. Ball, B. Bond-Lamberty, K. S. Cheruvelil, A. O. Finley, N. R. Lottig, S. W. Punyasena, J. Xiao, J. Zhou, L. B. Buckley, C. T. Filstrup, T. H. Keitt, J. R. Kellner, A. K. Knapp, A. D. Richardson, D. Tcheng, M. Toomey, R. Vargas, J. W. Voordeckers, T. Wagner and J. W. Williams. 2014. Approaches to advance scientific understanding of macrosystems ecology. Frontiers in Ecology and the Environment 12(1):15-23. DOI: 10.1890/130019. (link )

2011

Collins, S. L., S. R. Carpenter, S. M. Swinton, D. E. Orenstein, D. L. Childers, T. L. Gragson, N. B. Grimm, J. M. Grove, S. L. Harlan, J. P. Kaye, A. K. Knapp, G. P. Kofinas, J. J. Magnuson, W. H. McDowell, J. M. Melack, L. A. Ogden, G. P. Robertson, M. D. Smith and A. C. Whitmer. 2011. An integrated conceptual framework for social-ecological research. Frontiers in Ecology and the Environment 9(6):351-357. (link )

Knapp, A. K., M. Mincarone, H. Harwell, B. A. Polidoro, J. C. Sanciangco and K. E. Carpenter. 2011. Conservation status of the world's hagfish species and the loss of phylogenetic diversity and ecosystem function. Aquatic Conservation: Marine and Freshewater Ecosystems 21(5):401-411. DOI: 10.1002/aqc.1202. (link )

2004

Huxman, T. E., M. D. Smith, P. A. Fay, A. K. Knapp, M. R. Shaw, M. E. Loik, S. D. Smith, D. T. Tissue, J. C. Zak, J. F. Weltzin, W. T. Pockman, O. E. Sala, B. M. Haddad, J. Harte, G. W. Koch, S. Schwinning, E. E. Small and D. Williams. 2004. Convergence across biomes to a common rain-use efficiency. Nature 429:651-654. DOI: 10.1038/nature02561. (link )

2003

Foster, D. R., F. Swanson, J. D. Aber, J. Burke, N. Brokaw, D. Tilman and A. K. Knapp. 2003. The importance of land-use legacies to ecology and conservation. BioScience 53(1):77-88.

Books

1998

Knapp, A. K., J. M. Briggs, D. C. Harnett and S. L. Collins. 1998. Grassland dynamics: Long-term ecological research in Tallgrass Prairies. Oxford University Press. Oxford and New York.

Book Chapters

2007

Knapp, A. K., J. M. Briggs, D. L. Childers and O. E. Sala. 2007. Estimating aboveground net primary production in grassland- and herbaceous-dominated ecosystems. Pp. 27-48 In: Fahey, T. J. and A. K. Knapp eds., Principles and Standards for Measuring Primary Production (Long-Term Ecological Research Network). Oxford University Press.

Posters

2019

Baur, L. E., S. L. Collins, A. K. Knapp and M. D. Smith. 2019. Chronic drought severely alters plant species composition in arid grasslands. Poster presented at the 21st Annual CAP LTER All Scientists Meeting and Poster Symposium, January 11, 2019, Skysong, Scottsdale, AZ. (link )

Presentations

2012

Knapp, A. K., B. A. Polidoro, J. J. Alvarado, M. Benavides, K. E. Carpenter, C. Conand, R. U. Gamboa, J. Hamel, H. Harwell, A. Mercier, E. P. Ortiz, S. Purcell and M. V. Toral-Granda. 2012. Extinction risk of the world's sea cucumber species (order Aspidochirotida). Presentation at the 22-24 March 2012 Benthic Ecology Meeting, Norfolk, VA.

Report Chapters

2013

Yao, J., O. E. Sala and D. P. Peters. 2013. Cross-site studies "by design": Experiments and observations that provide new insights. Pp. 72-80 In: Peters, D. P., C. M. Laney, A. E. Lugo, S. L. Collins, C. T. Driscoll, P. M. Groffman, J. M. Grove, A. K. Knapp, T. K. Kratz, M. D. Ohman, R. B. Waide and J. Yao eds., Long-Term Trends in Ecological Systems: A Basis for Understanding Responses to Global Change. U.S. Department of Agriculture. Technical Bulletin 1931. Washington, D.C. (link )