Spatial responses of hyporheic invertebrates to seasonal changes in environmental parameters

被引:35
作者
Storey, RG [1 ]
Williams, DD [1 ]
机构
[1] Univ Toronto, Dept Life Sci, Scarborough, ON M1C 1A4, Canada
关键词
hyporheic; invertebrates; lotic; meiofauna; streams;
D O I
10.1111/j.1365-2427.2004.01284.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
1. Spatial relationships between hyporheic invertebrates and subsurface water flow patterns, sediment characteristics, water physicochemical parameters and several possible food sources were compared over three seasons at one site beneath a riffle. Measures of food sources included particulate organic matter (POM), bacterial activity (aerobic respiration, nitrate respiration and mineralisation of organic nitrogen) and microbial abundance. 2. Patterns of water flow changed significantly over the 9-month study period, from predominantly upwelling beneath the entire riffle in spring, to distinct differentiation between downwelling and upwelling zones in summer and autumn. Water physicochemical parameters changed accordingly, showing gradually weaker correlations with depth and stronger correlations with zone between spring and autumn. 3. Despite these changes, depth remained the strongest predictor of invertebrate richness, density and taxon composition throughout the study period. However, invertebrate distributions were secondarily correlated with water physicochemical parameters, and a minor gradient in invertebrate distributions between downwelling and upwelling zones became stronger from spring to summer. 4. The correlations between invertebrates and physicochemical parameters changed in both magnitude and direction with season. In spring, invertebrates showed a negative correlation with surface water infiltration, whereas in summer and autumn, the correlation was positive. Correlations were strongest in summer, when interstitial dissolved oxygen concentrations were lowest. 5. No relationships were found between hyporheic invertebrates and POM, microbial abundance or activity. This suggests that at this site, proximity to the streambed surface and physicochemical variables are more important than the abundance of food in controlling invertebrate distributions.
引用
收藏
页码:1468 / 1486
页数:19
相关论文
共 46 条
[1]  
Aldenderfer M., 1984, Cluster Analysis, DOI DOI 10.4135/9781412983648
[2]   HYPORHEIC BIOFILMS - A POTENTIAL FOOD SOURCE FOR INTERSTITIAL ANIMALS [J].
BARLOCHER, F ;
MURDOCH, JH .
HYDROBIOLOGIA, 1989, 184 (1-2) :61-67
[3]   MEIOFAUNAL GRAZING OF BACTERIA AND ALGAE IN A PIEDMONT STREAM [J].
BORCHARDT, MA ;
BOTT, TL .
JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY, 1995, 14 (02) :278-298
[4]  
Boulton A., 2000, Streams and Ground Waters, P337, DOI [DOI 10.1016/B978-012389845-6/50015-6, 10.1016/B978-012389845-6/50015-6]
[5]  
BOULTON AJ, 1992, ARCH HYDROBIOL, V125, P37
[6]   Effects of buried leaf litter and vertical hydrologic exchange on hyporheic water chemistry and fauna in a gravel-bed river in northern New South Wales, Australia [J].
Boulton, AJ ;
Foster, JG .
FRESHWATER BIOLOGY, 1998, 40 (02) :229-243
[7]  
Bretschko G., 1988, VERH INT VEREIN LIMN, V23, P1333, DOI 10.1080/03680770.1987.11898017
[8]  
Brunke M, 1999, ARCH HYDROBIOL, V146, P189
[9]   The ecological significance of exchange processes between rivers and groundwater [J].
Brunke, M ;
Gonser, T .
FRESHWATER BIOLOGY, 1997, 37 (01) :1-33
[10]   Growth of a stream-dwelling caddisfly (Olinga feredayi: Conoesucidae) on surface and hyporheic food resources [J].
Burrell, GP ;
Ledger, ME .
JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY, 2003, 22 (01) :92-104