DOI: 10.5194/hess-20-4323-2016
Scopus记录号: 2-s2.0-84994052011
论文题名: Influence of groundwater on distribution of dwarf wedgemussels (Alasmidonta heterodon) in the upper reaches of the Delaware River, northeastern USA
作者: Rosenberry D ; O ; , Briggs M ; A ; , Voytek E ; B ; , Lane J ; W
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 10 起始页码: 4323
结束页码: 4339
语种: 英语
Scopus关键词: Discharge (fluid mechanics)
; Electric discharges
; Electromagnetic induction
; Groundwater
; Infrared imaging
; Seepage
; Temperature measurement
; Thermography (imaging)
; Areal distribution
; Bed temperature
; Distributed temperature sensing
; Electromagnetic conductivity
; Ground water discharge
; Hyporheic exchange
; Monitoring wells
; Upward seepage
; Rivers
; bivalve
; discharge
; endangered species
; groundwater
; habitat selection
; population distribution
; seepage
; spatial analysis
; temperature profile
; Delaware River
; United States
; Alasmidonta heterodon
英文摘要: The remaining populations of the endangered dwarf wedgemussel (DWM) (Alasmidonta heterodon) in the upper Delaware River, northeastern USA, were hypothesized to be located in areas of greater-than-normal groundwater discharge to the river. We combined physical (seepage meters, monitoring wells and piezometers), thermal (fiber-optic distributed temperature sensing, infrared, vertical bed-temperature profiling), and geophysical (electromagnetic-induction) methods at several spatial scales to characterize known DWM habitat and explore this hypothesis. Numerous springs were observed using visible and infrared imaging along the river banks at all three known DWM-populated areas, but not in adjacent areas where DWM were absent. Vertical and lateral groundwater gradients were toward the river along all three DWM-populated reaches, with median upward gradients 3 to 9 times larger than in adjacent reaches. Point-scale seepage-meter measurements indicated that upward seepage across the riverbed was faster and more consistently upward at DWM-populated areas. Discrete and areally distributed riverbed-temperature measurements indicated numerous cold areas of groundwater discharge during warm summer months; all were within areas populated by DWM. Electromagnetic-induction measurements, which may indicate riverbed geology, showed patterning but little correlation between bulk streambed electromagnetic conductivity and areal distribution of DWM. In spite of complexity introduced by hyporheic exchange, multiple lines of research provide strong evidence that DWM are located within or directly downstream of areas of substantial focused groundwater discharge to the river. Broad scale thermal-reconnaissance methods (e.g., infrared) may be useful in locating and protecting other currently unknown mussel populations . © Author(s) 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78701
Appears in Collections: 气候变化事实与影响
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作者单位: US Geological Survey, DFC, Denver, CO, United States; US Geological Survey, 11 Sherman Place, Storrs, CT, United States; Colorado School of Mines, 1500 Illinois Street, Golden, CO, United States
Recommended Citation:
Rosenberry D,O,, Briggs M,et al. Influence of groundwater on distribution of dwarf wedgemussels (Alasmidonta heterodon) in the upper reaches of the Delaware River, northeastern USA[J]. Hydrology and Earth System Sciences,2016-01-01,20(10)