Zachary H Bowen, Ph.D.
Science and Products
Effects of flow regulation on shallow-water habitat dynamics and floodplain connectivity
Our study examined the effects of flow regulation on the spatiotemporal availability of shallow habitat patches with slow current velocity (SSCV patches) and floodplain inundation in the unregulated Yellowstone River and the regulated Missouri River in Montana and North Dakota. We mapped representative sites and used hydraulic models and...
Bowen, Z.H.; Bovee, K.D.; Waddle, T.J. Evaluation of Light Detection and Ranging (LIDAR) for measuring river corridor topography
LIDAR is relatively new in the commercial market for remote sensing of topography and it is difficult to find objective reporting on the accuracy of LIDAR measurements in an applied context. Accuracy specifications for LIDAR data in published evaluations range from 1 to 2 m root mean square error (RMSEx,y) and 15 to 20 cm RMSEz. Most of these...
Bowen, Z.H.; Waltermire, R.G. Flow and habitat effects on juvenile fish abundance in natural and altered flow regimes
Conserving biological resources native to large river systems increasingly depends on how flow-regulated segments of these rivers are managed. Improving management will require a better understanding of linkages between river biota and temporal variability of flow and instream habitat. However, few studies have quantified responses of native...
Freeman, Mary C.; Bowen, Z.H.; Bovee, K.D.; Irwin, E.R. Habitat measurement and modeling in the Green and Yampa Rivers: Project Report to Natural Resource Preservation Program December 2001
Populations of the endangered razorback sucker (Xyrauchen texanus) in the middle Green River have declined since closer of Flaming Gorge Dam in 1962. The apparent cause for the decline is a lack of successful recruitment. Recruitment failure has been attributed to habitat alteration and competition and predation by exotic fishes on early life...
Bowen, Z.H.; Bovee, K.D.; Waddle, T.J.; Modde, T.; Kitcheyan, C. Transferability of habitat suitability criteria: Response to comment
Response to comment by Williams, et al., 1999. North American Journal of Fisheries Management 19:623-625.
Freeman, Mary C.; Bowen, Z.H.; Bovee, K.D. Evaluation of generalized habitat criteria for assessing impacts of altered flow regimes on warmwater fishes
Assessing potential effects of flow regulation on southeastern warmwater fish assemblages is problematic because of high species richness and our poor knowledge of habitat requirements for most species. A previous attempt to reduce the complexity of describing habitat requirements for diverse assemblages defined five 'key habitat' types based on...
Bowen, Z.H.; Freeman, Mary C.; Bovee, K.D. Sampling effort and estimates of species richness based on prepositioned area electrofisher samples
Estimates of species richness based on electrofishing data are commonly used to describe the structure of fish communities. One electrofishing method for sampling riverine fishes that has become popular in the last decade is the prepositioned area electrofisher (PAE). We investigated the relationship between sampling effort and fish species...
Bowen, Z.H.; Freeman, Mary C. Transferability of habitat suitability criteria for fishes in warmwater streams
We developed habitat suitability criteria and tested their transferability for nine fishes inhabiting unregulated Piedmont and Coastal Plain streams in Alabama. Criteria for optimal habitat were defined as those ranges of depth, velocity, substrate type, and cover type for which a species' suitability index (proportional abundance divided by...
Freeman, Mary C.; Bowen, Zachary H.; Crance, Johnie H. Two-dimensional habitat modeling in the Yellowstone/Upper Missouri River system
This study is being conducted to provide the aquatic biology component of a decision support system being developed by the U.S. Bureau of Reclamation. In an attempt to capture the habitat needs of Great Plains fish communities we are looking beyond previous habitat modeling methods. Traditional habitat modeling approaches have relied on one-...
Waddle, T. J.; Bovee, K.D.; Bowen, Z.H. Index of biotic integrity applied to a flow-regulated river system
Bowen, Z.H.; Freeman, Mary C.; Watson, D.L. Commercial mussels of Alabama
No abstract available.
McGregor, M. A.; Garner, J.T.; Bowen, Z.H. Evaluation of the mussel fishery in Wheeler Reservoir, Tennessee River
We evaluated the freshwater mussel fishery on Wheeler Reservoir, a 27,155-hectare mainstream impoundment of the Tennessee River in Alabama. During July 1991 through June 1992, we used a roving creel survey to conduct 285 interviews over 57 weekdays and 12 weekend days. Total harvest during the 12-month survey period was estimated to be 570 metric...
Bowen, Zack H.; Malvestuto, S. P.; Davies, W. D.; Crance, J. H.