Arid
DOI10.1111/j.1466-8238.2007.00297.x
Altered stream-flow regimes and invasive plant species: the Tamarix case
Stromberg, Juliet C.; Lite, Sharon J.; Marler, Roy; Paradzick, Charles; Shafroth, Patrick B.; Shorrock, Donna; White, Jacqueline M.; White, Margaret S.
通讯作者Stromberg, Juliet C.
来源期刊GLOBAL ECOLOGY AND BIOGEOGRAPHY
ISSN1466-822X
EISSN1466-8238
出版年2007
卷号16期号:3页码:381-393
英文摘要

Aim To test the hypothesis that anthropogenic alteration of stream-flow regimes is a key driver of compositional shifts from native to introduced riparian plant species.


Location The arid south-western United States; 24 river reaches in the Gila and Lower Colorado drainage basins of Arizona.


Methods We compared the abundance of three dominant woody riparian taxa (native Populus fremontii and Salix gooddingii, and introduced Tamarix) between river reaches that varied in stream-flow permanence (perennial vs. intermittent), presence or absence of an upstream flow-regulating dam, and presence or absence of municipal effluent as a stream water source.


Results Populus and Salix were the dominant pioneer trees along the reaches with perennial flow and a natural flood regime. In contrast, Tamarix had high abundance (patch area and basal area) along reaches with intermittent stream flows (caused by natural and cultural factors), as well as those with dam-regulated flows.


Main conclusions Stream-flow regimes are strong determinants of riparian vegetation structure, and hydrological alterations can drive dominance shifts to introduced species that have an adaptive suite of traits. Deep alluvial groundwater on intermittent rivers favours the deep-rooted, stress-adapted Tamarix over the shallower-rooted and more competitive Populus and Salix. On flow-regulated rivers, shifts in flood timing favour the reproductively opportunistic Tamarix over Populus and Salix, both of which have narrow germination windows. The prevailing hydrological conditions thus favour a new dominant pioneer species in the riparian corridors of the American Southwest. These results reaffirm the importance of reinstating stream-flow regimes (inclusive of groundwater flows) for re-establishing the native pioneer trees as the dominant forest type.


英文关键词aridity flood disturbance hydrology invasion novel ecosystems riparian stream-flow regime vegetation
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000245605900013
WOS关键词SOUTHWESTERN UNITED-STATES ; SAN-PEDRO RIVER ; RIPARIAN VEGETATION ; POPULUS-FREMONTII ; COLORADO RIVER ; RIO-GRANDE ; ECOLOGICAL CONSEQUENCES ; BASIC PRINCIPLES ; WATER SALVAGE ; NATIVE TREES
WOS类目Ecology ; Geography, Physical
WOS研究方向Environmental Sciences & Ecology ; Physical Geography
来源机构United States Geological Survey ; Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/154395
作者单位(1)Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA;(2)Cascade Coll, Portland, OR 97216 USA;(3)Salt River Project, Phoenix, AZ 85072 USA;(4)US Geol Survey, Ft Collins, CO 80526 USA
推荐引用方式
GB/T 7714
Stromberg, Juliet C.,Lite, Sharon J.,Marler, Roy,et al. Altered stream-flow regimes and invasive plant species: the Tamarix case[J]. United States Geological Survey, Arizona State University,2007,16(3):381-393.
APA Stromberg, Juliet C..,Lite, Sharon J..,Marler, Roy.,Paradzick, Charles.,Shafroth, Patrick B..,...&White, Margaret S..(2007).Altered stream-flow regimes and invasive plant species: the Tamarix case.GLOBAL ECOLOGY AND BIOGEOGRAPHY,16(3),381-393.
MLA Stromberg, Juliet C.,et al."Altered stream-flow regimes and invasive plant species: the Tamarix case".GLOBAL ECOLOGY AND BIOGEOGRAPHY 16.3(2007):381-393.
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