1. Nilsen, E. T., and W. H. Muller. 1980. An evaluation of summer deciduousness in Lotus scoparius (Nutt. in T & G) Ottley. American Midlanf Naturalist 103:88-95.

2. Nilsen, E. T., and W. H. Muller. 1980. The relative naturalization ability of two Schinus species in southern California. I: Seed germination. Bulletin of the Torrey Botanical Club 107:51-56.

3. Nilsen, E. T., and W. H. Muller. 1980. The relative naturalization ability of two Schinus species in southern California. II: Seedling establishment. Bulletin of the Torrey Botanical Club 107:232-237.

4. Nilsen, E. T., and W. H. Muller. 1981. The influence of low plant water potential on the growth and nitrogen metabolism of the native California fire response shrub Lotus scoparius (Nutt. in T & G) Ottley. American Journal of Botany 68(3):402-407.

5. Nilsen, E. T., and W. H. Muller. 1981. Phenology of the summer deciduous shrub Lotus scoparius. Climatic controls and adaptive significance. Ecological Monographs 51:323-341.

6. Nilsen, E. T., and W. H. Schlesinger. 1981. The influence of the Mediterranean climate on nutrients, particularly nitrogen, in an even aged stand of the summer deciduous, fire response shrub Lotus scoparius. Oecologia. 50:217-224.

7. Sharifi, M. R., E. T. Nilsen, and P. W. Rundel. 1981. Biomass and net primary production of Prosopis glandulosa (Fabaceae) at Harper's Well, California. American Journal of Botany. 69:760-767.

8. Nilsen, E. T. 1981. Conservation of post fire nutrients by Lotus scoparius in the Santa Ynez mountains pp.91-296. In. C. E. Conrad, and W. C. Ochel (eds.). Dynamics and Management of Mediterranean-Type Ecosystems: Pacific Southwest Forest and Range Experiment Station Berkeley, CA, 637 pp.

9. Jarrell, W. M., R. A. Virginia, D. H. Kohl, G. Shearer, B. A. Bryan, P. W. Rundel, E. T. Nilsen, and M. A. Sharifi. 1982. Symbiotic nitrogen fixation by mesquite and its management implications. Mesquite Utilization Symposium, Lubbock, Texas.

10. Nilsen, E. T., M. R. Sharifi, and P. W. Rundel. 1981. Summer water relations of Prosopis glandulosa (Fabaceae) at Harper's Well, California. Oecologia. 50:271-276.

11. Nilsen, E. T. and W. H. Muller. 1982. The influence of photoperiod on drought induction of dormancy in Lotus scoparius (Nutt. in T & G). Oecologia. 53:79-83.

12. Rundel, P. W., E. T. Nilsen, M. R. Sharifi, R. A. Virginia, W. M. Jarrell, D. H. Kohl and G. B. Shearer. 1982. Seasonal dynamics of nitrogen cycling for a Prosopis woodland in the Sonoran desert. Plant and Soil 67:343-353.

13. Sharifi, M. R., E. T. Nilsen, and P. W. Rundel. 1983. Phenology of current growth in Prosopis glandulosa (Fabaceae) at Harper's Well, California. Flora. 173:265-277.

14. G. Shearer, D. H. Kohl, R. A. Virginia, B. A. Bryan, J. L. Skeeters, E. T. Nilsen, M. R. Sharifi, and P. W. Rundel. 1983. Estimates of N2-fixation from variation in the natural abundance of 15N in Sonoran Desert Ecosystems. Oecologia 56:365-373.

15. Nilsen, E. T., P. W. Rundel, and M. R. Sharifi. 1983. Diurnal and seasonal water relations of Prosopis glandulosa, a desert phreatophyte in southern California. Ecology 64:1381-1393.

16. Nilsen, E. T., Sharifi, M. R., and P. W. Rundel. 1984. Biomass and production of native stands of Prosopis glandulosa in California wash woodlands; management implications. pp. 722-727, In R. E. Warner and K. M. Hendrix (eds.). California Riparian Systems: ecology, conservation, and product management. University of California, Press, Berkeley. 1035 pp.

17. Nilsen, E. T., M. R. Sharifi, P. W. Rundel, R. A. Virginia. 1986. Influences of microclimatic conditions and water relations on seasonal leaf dimorphism of the desert phreatophyte P. glandulosa. Oecologia 69:95-100.

18. Nilsen, E. T., R. A. Virginia and W. M. Jarrell. 1986. Water relations and growth characteristics of Prosopis glandulosa var torreyana in a simulated phreatophytic environment. American Journal of Botany: 73:427-433.

19. Nilsen, E. T., M. R. Sharifi, and P. W. Rundel. 1987. Phenology of desert phreatophytes: Seasonal growth and herbivory in Prosopis glandulosa var. torreyana (Honey Mesquite). Journal Arid Environments: 13(3):217-229.

20. Nilsen, E. T., M. R. Sharifi, and P. W. Rundel. 1987. Leaf dynamics in an evergreen and a deciduous species with even-aged leaf cohorts from different environments. American Midland Naturalist 118(1):46-55.

21. Nilsen, E.T., F.C. Meinzer, and P.W. Rundel. 1989. Photosynthetic responses to light, temperature, humidity, and CO2 in the stem photosynthetic desert tree Psorothamnus spinosa. Oecologia. 79:193?197.

22. Nilsen, E. T., and Y. Bao. 1990. Stem photosynthesis in Legumes; The influence of water stress on gas exchange of Glycine max var: essex and Sparteum junceum. American Journal of Botany. 77:(8):1007-1015.

23. Nilsen, E. T., M. R. Sharifi, and P. W. Rundel. 1991. Quantitative phenology of warm desert legumes II: Seasonal growth of six Prosopis species at the same site. Journal of Arid Environments. 0:299-311.

24. Nilsen, E. T. 1992. The influence of water stress on leaf and stem photosynthesis in Sparteum junceum L. Plant Cell and Environment. 15(4):457-462.

25. Nilsen, E. T. 1992. Partitioning growth and photosynthesis between leaves and stems during nitrogen limitation in Spartium junceum. American Journal of Botany 79(10):1217-1223.

26. Nilsen, E.T., D. Karpa, H.A. Mooney, and C. Field. 1993 Patterns of stem assimilation in two species of invasive legumes in coastal California. American Journal of Botany 80(10):1126-1136.

27. Nilsen, E.T., M.R. Sharifi. 1994. Seasonal acclimation of stem photosynthesis to habitat conditions by two legumes in the Sonoran and Mojave deserts of California. Plant Physiology 105:1385-1391.

28.Nilsen, E.T., and D. Karpa. 1994. Seasonal acclimation of stem photosynthesis in two invasive, naturalized legume species from coastal habitats of California. Photosynthetica 30: 77-90.

29. Nilsen, E.T. 1995. Stem Photosynthesis: Extent, patterns, and role in plant carbon economy. in (B. Gartner ed.) Stems and Trunks in Plant Form and Function. pp 223-240. Academic Press, San Diego.

30. Nilsen, E.T., M.R. Sharifi, P.W. Rundel. 1996. Diurnal gas exchange characteristics of two stem photosynthesizing legumes in relation to climate at two contrasting sites in the California desert. Flora 191:105-116.

31. E.T. Nilsen and D. M. Orcutt. 1996. The Physiology of Plants Under Stress: Abiotic Factors. John Wiley and Sons, New York, NY 689 pp.

32. Nilsen, E.T., and M.R. Sharifi. 1997. Carbon isotope composition of legumes with photosynthetic stems from mediteranean and desert habitats. American Journal of Botany 84(12)1707-1713.

33. Nilsen, E.T, and S. Semones. 1997. Comparison of quantitative growth and physiological traits between pseudo-populations of genets and ramets derived from an invasive weed, Spartium junceum (Fabaceae). International Journal of Plant Sciences 158(6)827-834.