Positive effects of soil nitrogen pulses on individuals can have negative consequences for population growth during drought in a herbaceous desert perennial

1 Resource pulses generally result in a burst of biological activity at multiple scales. For plants, the increased activity is generally considered positive due to an overall up-regulation of physiological activity during the pulse. Longer-term effects remain an understudied aspect of resource pulses. 2 We monitored the short- and long-term effects of nitrogen (N) pulse to the long-lived desert perennial, Cryptantha flava. One group of plants were treated with a one-time application of N in the spring of 1999, a second group received two N pulses (one in the spring of 1999 and one in the spring of 2000), and a third group received ambient N (controls). 3 In the short-term, N-pulse treated plants rapidly increased...

Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado Plateau, Cryptantha flava, Journal of Ecology, matrix models, nitrogen pulses, All tags... precipitation, resource allocation, trade-off, Fewer tags