An integrative approach towards understanding ecological responses to dam removal: The Manatawny Creek Study

被引:86
作者
Bushaw-Newton, KL
Hart, DD
Pizzuto, JE
Thomson, JR
Egan, J
Ashley, JT
Johnson, TE
Horwitz, RJ
Keeley, M
Lawrence, J
Charles, D
Gatenby, C
Kreeger, DA
Nightengale, T
Thomas, RL
Velinsky, DJ
机构
[1] Acad Nat Sci Philadelphia, Patrick Ctr Environm Res, Philadelphia, PA 19103 USA
[2] Univ Delaware, Dept Geol, Newark, DE 19716 USA
[3] Delaware Riverkeeper Network, Washington Crossing, PA 18977 USA
来源
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION | 2002年 / 38卷 / 06期
关键词
D O I
10.1111/j.1752-1688.2002.tb04366.x
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Dam removal has been proposed as an effective method of river restoration, but few integrative studies have examined ecological responses to the removal of dams. In 1999, we initiated an interdisciplinary study to determine ecological responses to the removal of a 2 m high dam on lower Manatawny Creek in southeastern Pennsylvania. We used an integrative monitoring program to assess the physical, chemical, and biological responses to dam removal. Following removal in 2000, increased sediment transport has led to major changes in channel form in the former impoundment and downstream reaches. Water quality did not change markedly following removal, probably because of the impoundment's short hydraulic residence time (less than two hours at base flow) and infrequent temperature stratification. When the impoundment was converted to a free flowing reach, the composition of the benthic macroinvertebrate and fish assemblages in this portion of Manatawny Creek shifted dramatically from lentic to lotic taxa. Some fish species inhabiting the free flowing reach downstream from the dam were negatively affected by large scale sediment transport and habitat alteration following dam removal, but this appears to be a short term response. Based on our observations and experiences in this study, we provide a list of issues to evaluate when considering future dam removals.
引用
收藏
页码:1581 / 1599
页数:19
相关论文
共 85 条
[1]  
*AM RIV FRIENDS EA, 1999, DAM REM SUCC STOR RE
[2]  
[Anonymous], 1996, Method 3052: Microwave assisted acid digestion of siliceous and organically based matrices
[3]  
*APHA AWWA WPCF, 1998, STAND METH EX WAT WA
[4]   Hydrophobic organic contaminants in surficial sediments of Baltimore Harbor: Inventories and sources [J].
Ashley, JTF ;
Baker, JE .
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, 1999, 18 (05) :838-849
[5]   SEMIAUTOMATED METHOD FOR DETERMINATION OF INORGANIC, ORGANIC AND TOTAL PHOSPHATE IN SEDIMENTS [J].
ASPILA, KI ;
AGEMIAN, H ;
CHAU, ASY .
ANALYST, 1976, 101 (1200) :187-197
[6]  
Barbour MT, 1999, 841B99002 EPA OFF WA
[7]   HYDROCARBON GEOCHEMISTRY OF THE PUGET SOUND REGION .3. POLYCYCLIC AROMATIC-HYDROCARBONS IN SEDIMENTS [J].
BARRICK, RC ;
PRAHL, FG .
ESTUARINE COASTAL AND SHELF SCIENCE, 1987, 25 (02) :175-191
[8]   ENVIRONMENTAL EFFECTS OF DAMS AND IMPOUNDMENTS [J].
BAXTER, RM .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1977, 8 :255-283
[9]   Undamming rivers: A review of the ecological impacts of dam removal [J].
Bednarek, AT .
ENVIRONMENTAL MANAGEMENT, 2001, 27 (06) :803-814
[10]  
BOGAN AE, 1993, AM ZOOL, V33, P599