nutrient

Legacy ID: 
3 782
Publication Title: 

Can Nitrogen fertilization aid restoration of mature tree productivity in degraded dryland riverine ecosystems?

Authors: 
Andersen, D.C., E.C. Adair, S.M. Nelson, and D. Binkley
Publication Date: 
2014
Parent Publication Title: 
Restoration Ecology
Publication Type: 
Archive number: 
2014/0050 FORT
States: 

Pub Abstract: 

Restoration of riparian forest productivity lost as a consequence of flow regulation is a common management goal in dryland riverine ecosystems. In the northern hemisphere, dryland river floodplain trees often include one or another species of Populus, which are fast-growing, nutrient-demanding trees. Because the trees are phreatophytic in drylands, and have water needs met in whole or in part by a shallow water table, their productivity may be limited by nitrogen (N) availability, which commonly limits primary productivity in mesic environments. We added 20 g N m−2 in a 2-m radius around the base of mature Populus fremontii along each of a regulated and free-flowing river in semiarid northwest Colorado, USA (total n = 42) in order to test whether growth is constrained by low soil N. Twelve years after fertilization, we collected increment cores from these and matched unfertilized trees and compared radial growth ratios (growth in the 3-year post-fertilization period/growth in the 3-year pre-fertilization period) in paired t tests. We expected a higher mean ratio in the fertilized trees. No effect from fertilization was detected, nor was a trend evident on either river. An alternative test using analysis of covariance (ANCOVA) produced a similar result. Our results underscore the need for additional assessment of which and to what extent factors other than water control dryland riverine productivity. Positive confirmation of adequate soil nutrients at these and other dryland riparian sites would bolster the argument that flow management is necessary and sufficient to maximize productivity and enhance resilience in affected desert riverine forests.

Publication Title: 

The effect of resource quantity and resource stoichiometry on microbial carbon-use-efficiency

Authors: 
Keiblinger,K.M., E.K. Hall, W. Wanek, U. Szukics, I. Hämmerle, G. Ellersdorfer, S. Böck, J. Strauss, K. Sterflinger, A. Richter, and S. Zechmeister-Boltenstern
Publication Date: 
2010
Updated Date (text): 
2013-03-07
Parent Publication Title: 
FEMS Microbiology Ecology
Publication Type: 
Archive number: 
NONCTR/00310

Pub Abstract: 
Publication Title: 

Interactive effect of temperature and resources on carbon cycling by freshwater bacterioplankton communities

Authors: 
Hall, E.K. and J.B. Cotner
Publication Date: 
2007
Updated Date (text): 
2013-03-07
Parent Publication Title: 
Aquatic Microbial Ecology
Publication Type: 
Archive number: 
NONCTR/00313

Pub Abstract: 
Publication Title: 

Marine derived nutrients (MDN) in riverine ecosystems: developing monitoring tools for tracking MDN in Alaska watersheds

Authors: 
Rinella, D.J., M.S. Wipfli, C. Walker, C.A. Stricker, and R. Heintz
Publication Date: 
2005
Updated Date (text): 
2012-05-31
Parent Publication Title: 
American Geophysical Union, Joint Assembly Meeting, New Orleans, Louisiana, 23—27 May 2005
Publication Type: 
Archive number: 
2005/0178 FORT
States: 

Pub Abstract: 
Publication Title: 

Stream chemistry and hydrologic pathways during snowmelt in a small watershed adjacent Lake Superior

Authors: 
Stottlemyer, R. and D. Toczydlowski
Publication Date: 
1991
Updated Date (text): 
2009-04-09
Parent Publication Title: 
Biogeochemistry
Publication Type: 
Archive number: 
NonCTR/00182

Pub Abstract: 
Publication Title: 

Extreme plasticity in thermoregulatory behaviors of free-ranging black-tailed prairie dogs

Authors: 
Lehmer, E.M., L.T. Savage, M.F. Antolin, and D.E. Biggins
Publication Date: 
2006
Updated Date (text): 
2008-10-17
Parent Publication Title: 
Physiological and Biochemical Zoology
Publication Type: 
Archive number: 
2006/0096 FORT

Pub Abstract: 
Publication Title: 

Influence of cryptobiotic soil crusts on elemental content of tissue of two desert seed plants

Authors: 
Belnap, J., and K.T. Harper
Publication Date: 
1995
Updated Date (text): 
2005-03-11
Parent Publication Title: 
Arid Soil Research and Rehabilitation
Publication Type: 
Archive number: 
1995/0108 MESC

Pub Abstract: 

Molecular Ecology Laboratory

Code: 
RB00CNJ.12.0
MEL Screen capture
MEL Screen capture
Abstract: 

For many natural resource agencies, genetics has become increasingly important in the development of long-term management strategies, leading to a better understanding of species diversity, population dynamics and ecology, and future conservation and management needs. The Fort Collins Science Center operates a molecular genetic and systematics research facility, the Molecular Ecology Lab, to provide such genetics information. The Lab serves Federal research and resource management agencies by developing scientifically rigorous research programs to help resolve many of today’s conservation biology and natural resource management issues. To investigate the relationship among species, populations, families, and individuals, the lab employs DNA sequencing of nuclear, mitochondrial, and chloroplast DNA and fragment analysis.