NDLI: Seedling competition between native cottonwood and exotic saltcedar: implications for restoration

Content Provider	Springer Nature Link
Author	Bhattacharjee, Joydeep Taylor, John P. Smith, Loren M. Haukos, David A.
Copyright Year	2008
Abstract	Altered hydrology of southwestern United States rivers has led to a decline in native cottonwood (Populus deltoides). Areas historically dominated by cottonwood have been replaced by invasive saltcedar (Tamarix chinensis). Restoration of historic hydrology through periodic flooding of riparian areas has been a means of restoring native species. However, due to similarity in germination requirements of cottonwoods and saltcedars, flooding may create an unwanted increase in the number of saltcedar seedlings. Therefore, we evaluated competitive aspects of these co-occurring species in an extant riparian habitat in the arid southwestern US. We measured effects of competition between cottonwood and saltcedar seedlings and among cottonwood seedlings during the first growing season following seedling establishment in 360, 0.5 × 0.5-m plots at the Bosque del Apache National Wildlife Refuge, New Mexico. We used five interspecific density treatments and five intraspecific density treatments. Cottonwood seedling biomass and height were twice that of saltcedar seedlings across all density treatments. As density of cottonwood increased, intraspecific competition increased in severity and biomass of cottonwood seedlings decreased. At 4 plants/0.25 m2, cottonwood seedlings had the greatest biomass; whereas, survival was highest at 10 plants/0.25 m2. Our results support greenhouse studies and suggest that if favorable germination conditions are established for cottonwood in floodplains, saltcedar seedlings that cogerminate could be outcompeted by native cottonwood seedlings.
Starting Page	1777
Ending Page	1787
Page Count	11
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	11
Issue Number	8
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-10-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biomass Competition Cottonwood Saltcedar Seedling Riparian Developmental Biology Ecology Plant Sciences Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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