Statistical analysis of monitoring data aids in prediction of stream temperature

Stream temperature change detection for state and private forests in the Oregon Coast Range

“…We expect the magnitude of the temperature response to harvest will additionally be affected by factors such as channel gradient [ Subehi et al , 2009], aspect [ Gomi et al , 2006], treatment length, channel width, elevation [ Arscott et al , 2001], channel substrate, wood storage [ Kasahara and Wondzell , 2003], and subsurface hydrology [ Story et al , 2003]. Our next analytical effort will incorporate these parameters, step away from regulatory constraints, and collectively examine temperature responses from multiple sites and years (possibly relying on a mixed effects procedure as promoted by Tate et al [2005]) and summarized either seasonally or at a daily or shorter time period [e.g., Gomi et al , 2006]. Ultimately, we hope to describe stream temperature and large wood recruitment patterns for a full 5 years postharvest, a period when riparian vegetation has an opportunity to exploit increases in sunlight availability [ Quinn and Wright‐Stow , 2008], buffers are subject to windthrow [ Grizzel and Wolff , 1998], and sediment may move into or out of the channels [ Bruijnzeel , 2004].…”

Guidelines for Riparian Vegetative Shade Restoration Based Upon a Theoretical Shaded‐Stream Model1

“…, 2006; Zwieniecki and Newton, 1999). An alternative approach for transmitted radiation is specification of the crown cover above the channel (Tate et al. , 2005) or the fraction of incoming shortwave radiation transmitted by vegetation (Amaranthus et al.…”

“…Forested buffer zone widths ranging from about 9-30 m width are generally considered adequate to maintain thermal regimes in such small streams (Beschta et al, 1987;Sridhar et al, 2004;Lanini et al, 2004;Wilkerson et al, 2006;Zwieniecki and Newton, 1999). An alternative approach for transmitted radiation is specification of the crown cover above the channel (Tate et al, 2005) or the fraction of incoming shortwave radiation transmitted by vegetation (Amaranthus et al, 1989;Davies-Colley and Payne, 1998). For example, forest streams may only naturally receive 10-20% of above-canopy solar radiation during summer when maximum temperatures occur, but receipt of only 30-50% of incoming solar after restoration is often considered desirable or acceptable (Davies-Colley and Quinn, 1998;Broadmeadow and Nisbet, 2004;Rutherford et al, 1997a).…”

Impact of environmental factors on fish distribution assessed in rangeland streams

“…This study provides a foundation for understanding the current conditions and relationships among stream habitat, fish distribution and habitat use, as they correspond to the period of agricultural irrigation-water extraction and return to Cow Creek. Fish habitat use and distribution is not static and is driven by factors (temperature and pool depth) that could logically be affected by stream-based irrigation diversion and return irrigation practices (Tate, Lile et al 2005;. The next focus of research on the potential linkage between irrigation management and habitat factors should be strategic stream temperature and flow monitoring of lower elevation pools.…”

“…Seven individual linear mixed-effects analyses were conducted to determine if there were statistically significant (P < 0.05) differences for the water temperature, pool depth and area, flow, and elevation of pools occupied by trout compared to pools not occupied by trout, between June and October. Linear mixed-effects analysis has distinct advantages for repeated-measures field studies such as this one, and has been used successfully to analyze other California stream data sets (Tate, Lile et al 2005). Because we repeatedly sampled each site over the course of several months, there is a potential for codependence between observations made at each site at different times.…”