INFLUENCE OF THE MORPHOLOGICAL AND HYDRAULIC CHARACTERISTICS OF MOUNTAIN STREAMS ON FISH HABITAT SUITABILITY CURVES

2011 ◽  
Vol 28 (8) ◽  
pp. 1161-1178 ◽  
Author(s):  
V. Macura ◽  
A. Škrinár ◽  
K. Kaluz ◽  
M. Jalčovíková ◽  
M. Škrovinová
Keyword(s):  
Habitat Suitability ◽  
Fish Habitat ◽  
Mountain Streams ◽  
Hydraulic Characteristics

scholarly journals Influence of discharge on fish habitat suitability curves in mountain watercourses in IFIM methodology

2018 ◽  
Vol 66 (1) ◽  
pp. 12-22 ◽  
Author(s):  
Viliam Macura ◽  
Zuzana Š Štefunková ◽  
Martina Majorošová ◽  
Peter Halaj ◽  
Andrej Škrinár
Keyword(s):  
Habitat Suitability ◽  
Fish Habitat ◽  
Water Levels ◽  
Low Flow ◽  
Mountain Streams ◽  
Stream Habitat ◽  
Management Planning ◽  
Generalized Curves ◽  
Water Management Planning

Abstract In this study, the quality of the aquatic habitats of mountain and piedmont streams was evaluated using the ‘Instream Flow Incremental Methodology (IFIM)’ decision-making tool. The quality of habitats was interpreted from the behaviour of bioindicators in the form of habitat suitability curves (HSCs). From 1995 until the present, 59 different reaches of 43 mountain streams in Slovakia and 3 validation reaches were evaluated, and the results analysed. The aim of this study was to generalize the parameters of the HSCs for the brown trout. The generalized curves will be useful for water management planning. It is difficult and time-consuming to take hydrometrical and ichthyological measurements at different water levels. Therefore, we developed a methodology for modifying suitability curves based on an ichthyological survey during a low flow and a flow at which fish lose the ability to resist the flow velocity. The study provides the information how such curves can be modified for a wider flow range. In summary, this study shows that generalized HSCs provide representative data that can be used to support both the design of river restoration and the assessment of the impacts of the water use or of climate change on stream habitat quality.

Fish Habitat: Essential Fish Habitat and Rehabilitation

1999 ◽  
Keyword(s):  
Habitat Suitability ◽  
Polynomial Regression ◽  
Environmental Gradients ◽  
Fish Habitat ◽  
Tampa Bay ◽  
Spotted Seatrout ◽  
Charlotte Harbor ◽  
Biologically Relevant ◽  
Suitability Index ◽  
Catch Rates

<em>Abstract.—</em> A need exists to scientifically determine optimal fish habitats to support decision making for management of essential fish habitat. Scientists have been collaborating to conduct habitat suitability index (HSI) modeling to spatially delineate fish habitats for estuarine fish and invertebrate species in Tampa Bay and Charlotte Harbor, Florida. Results from HSI modeling of juvenile spotted seatrout <em>Cynoscion nebulosus </em> in Charlotte Harbor are presented. Data obtained from 1989–1997 by fisheries-independent monitoring in the two estuaries were used along with environmental data from other sources. Standardized catch-per-unit-effort (catch rates) were calculated across gear types using fisheries-monitoring data from Charlotte Harbor and Tampa Bay. Suitability index functions were determined using three methods: (1) frequency of occurrence, (2) mean catch rates within ranges, and (3) smooth-mean catch rates determined by polynomial regression. Mean catch rates were estimated within biologically relevant ranges and, where sufficient data were available, for finer intervals across environmental gradients. Suitability index functions across environmental gradients were then derived by scaling catch rates. Gridded habitat layers for temperature, salinity, depth, and bottom type in Charlotte Harbor were also created using a geographic information system. Habitat suitability index modeling was conducted using the U.S. Fish and Wildlife Service geometric mean method linked to the ArcView Spatial Analyst module. The model integrated suitability indices associated with the habitat layers for Charlotte Harbor to create a map of the predicted distribution for juvenile spotted seatrout during the fall season. Suitability indices developed for Tampa Bay were used with Charlotte Harbor habitat layers to test transfer of the indices to another estuary. Predicted HSI maps depicted low to optimum habitat suitability zones in Charlotte Harbor. Model performance was evaluated by statistically comparing the relative ranking of mean catch rates with mean suitability indices for corresponding zones. Suitability indices obtained using polynomial regression methods yielded morereliable HSI maps for juvenile spotted seatrout than those derived using mean catch rates within biologically relevant ranges. The observed map, derived using smooth-mean suitability indices transferred from Tampa Bay, was not significantly different (Chi-square goodness-of-fit test) from the expected map derived using smooth-mean indices from Charlotte Harbor. Our modeling efforts using transferred indices indicate that it is possible to predict the geographic distributions of fish species by life stage in estuaries lacking fisheries monitoring.

Hydro-power production and fish habitat suitability: Assessing impact and effectiveness of ecological flows at regional scale

2018 ◽  
Vol 116 ◽  
pp. 29-39 ◽  
Author(s):  
Serena Ceola ◽  
Alessio Pugliese ◽  
Matteo Ventura ◽  
Giorgio Galeati ◽  
Alberto Montanari ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Fish Habitat ◽  
Regional Scale ◽  
Power Production ◽  
Hydro Power ◽  
Ecological Flows

scholarly journals Analysis for Underwater Sound on Natural River Habitat

2018 ◽  
Vol 40 ◽  
pp. 02047
Author(s):  
Jung-Eun Gu ◽  
Sang Hwa Jung ◽  
Joongu Kang ◽  
Hyoseop Woo
Keyword(s):  
Underwater Acoustics ◽  
Fish Habitat ◽  
Habitat Type ◽  
High Water ◽  
Physical Structure ◽  
Physical Habitat ◽  
Hydraulic Characteristics ◽  
Underwater Sound ◽  
Underwater Acoustic ◽  
Sound Environment

A riffle-pool structure is a representative physical structure of bed in rivers. The change in the physical parameter of the habitat could lead to changes in the sound environment of rivers, which are expressed by underwater acoustics. This change in underwater sound affects fish habitat. In this study, the changes of underwater acoustics were analyzed according to the change of pool-riffle sequence in a natural river. And the correlation between underwater acoustics and hydraulic characteristics was investigated. The survey for underwater acoustics was performed in the Namdae stream where is in Gangwon province. This stream belongs to the Han River basin and the river length is 39.01 km and the catchment area is 127.56 km2. The Namdae stream is a river that accounts for more than 70% of salmon returning to South Korea. The spawning salmon will return to this area around November after growing in the Bering Sea. It is important to manage the fish habitat in this river so there is a lot of research on the enhancement of fish habitat. Hydraulic characteristics were changed by the river bed structure. In this study, we investigated the relationship between underwater acoustic characteristics and hydraulic factors such as riverbed material, flow rate and water depth of each habitat type at 12 sites. The characteristics of underwater acoustic differed relative to different hydraulic factors of the two habitats, which is riffle and pool. The sound pressure level of riffles was relatively higher than that of the pools due to bed materials, shallow depth and high water velocity of riffles. In the future, it is considered that the underwater sound can be utilized as a parameter to evaluate the physical habitat environment of the river.

scholarly journals Importance of considering riparian vegetation requirements for the long-term efficiency of environmental flows in aquatic microhabitats

2017 ◽  
Vol 21 (11) ◽  
pp. 5763-5780 ◽  
Author(s):  
Rui Rivaes ◽  
Isabel Boavida ◽  
José M. Santos ◽  
António N. Pinheiro ◽  
Teresa Ferreira
Keyword(s):  
Fish Species ◽  
Riparian Vegetation ◽  
Environmental Flows ◽  
Fish Habitat ◽  
Natural Habitat ◽  
River Channel ◽  
Habitat Availability ◽  
Hydraulic Characteristics ◽  
Vegetation Development

Abstract. Environmental flows remain biased toward the traditional biological group of fish species. Consequently, these flows ignore the inter-annual flow variability that rules species with longer lifecycles and therefore disregard the long-term perspective of the riverine ecosystem. We analyzed the importance of considering riparian requirements for the long-term efficiency of environmental flows. For that analysis, we modeled the riparian vegetation development for a decade facing different environmental flows in two case studies. Next, we assessed the corresponding fish habitat availability of three common fish species in each of the resulting riparian landscape scenarios. Modeling results demonstrated that the environmental flows disregarding riparian vegetation requirements promoted riparian degradation, particularly vegetation encroachment. Such circumstance altered the hydraulic characteristics of the river channel where flow depths and velocities underwent local changes of up to 10 cm and 40 cm s−1, respectively. Accordingly, after a decade of this flow regime, the available habitat area for the considered fish species experienced modifications of up to 110 % when compared to the natural habitat. In turn, environmental flows regarding riparian vegetation requirements were able to maintain riparian vegetation near natural standards, thereby preserving the hydraulic characteristics of the river channel and sustaining the fish habitat close to the natural condition. As a result, fish habitat availability never changed more than 17 % from the natural habitat.

Remotely sensed hydroacoustics and observation data for predicting fish habitat suitability

2011 ◽  
Vol 31 (2) ◽  
pp. S17-S27 ◽  
Author(s):  
J. Monk ◽  
D. Ierodiaconou ◽  
A. Bellgrove ◽  
E. Harvey ◽  
L. Laurenson
Keyword(s):  
Habitat Suitability ◽  
Fish Habitat ◽  
Remotely Sensed ◽  
Observation Data

Effect of model formulation on the optimization of a genetic Takagi–Sugeno fuzzy system for fish habitat suitability evaluation

2011 ◽  
Vol 222 (8) ◽  
pp. 1401-1413 ◽  
Author(s):  
Shinji Fukuda ◽  
Bernard De Baets ◽  
Ans M. Mouton ◽  
Willem Waegeman ◽  
Jun Nakajima ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Fuzzy System ◽  
Fish Habitat ◽  
Model Formulation ◽  
Suitability Evaluation ◽  
Takagi Sugeno

Characteristics and function of large woody debris in subalpine Rocky Mountain streams in northern Colorado

1995 ◽  
Vol 52 (8) ◽  
pp. 1789-1802 ◽  
Author(s):  
Ann D. Richmond ◽  
Kurt D. Fauseh
Keyword(s):  
Pacific Northwest ◽  
Woody Debris ◽  
Fish Habitat ◽  
Rocky Mountain ◽  
Large Woody Debris ◽  
Mountain Streams ◽  
Coastal Forests ◽  
The Pacific ◽  
And Function ◽  
Rocky Mountain Streams

Large woody debris has been well studied in coastal forests of the Pacific Northwest, but little is known of its role in Rocky Mountain streams. Large woody debris was measured in 11 undisturbed streams draining subalpine old-growth forests in north central Colorado to assess abundance, characteristics, and function. Although large woody debris in Colorado had smaller diameter, length, and volume than in the Pacific Northwest, its abundance and function were similar. The majority of pools (76%) were plunge and dammed pools formed by large woody debris, most of which spanned the channels perpendicular to stream flow. Smaller streams had a greater proportion of such perpendicular pool-forming pieces than larger streams. Four disturbed streams had significantly less and smaller large woody debris than undisturbed streams. Flows in larger undisturbed streams were capable of moving large woody debris, so pieces were more often located at the stream margins, oriented diagonally, or distributed in clumps than in smaller streams. Individual pools were larger and deeper in larger streams, but their size was not related to the size of large woody debris pieces forming them. Therefore, the function of large woody debris in forming fish habitat in small Rocky Mountain streams is strongly influenced by the stream's location within the watershed.

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