Academic literature on the topic 'Stream ecology – Methodology'

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Journal articles on the topic "Stream ecology – Methodology"

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Mathur, Dilip, William H. Bason, Edmund J. Purdy Jr., and Carl A. Silver. "A Critique of the In stream Flow Incremental Methodology." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 4 (April 1, 1985): 825–31. http://dx.doi.org/10.1139/f85-105.

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A review and reanalysis of the published literature show that several assumptions are violated in the application of the Instream Flow Incremental Methodology (IFIM) without consideration of the implications of so doing. The fundamental assumption of a positive linear relationship between "potential available habitat" (WUA) and biomass of fish has neither been documented nor validated, particularly in warmwater streams. Absence of correlation precludes prediction of changes in fish populations. In some studies the test of this assumption appears to be equivalent to a calibration operation. The other assumption violated includes independent selection of habitat variables by fish. The presence of significant interaction among habitat variables can affect the stream flow recommendations. Another problem exists in application of Physical Habitat Simulation (PHABSIM): one WUA unit should not be interpreted as being equal to another in biological production or habitat value unless shown to be an exact replica. Several combinations of physical variables could give rise to the same amount of WUA, none of which may be correlated to the biomass of fish. The utilization, suitability, or preference curves should not be treated as probability functions; a rating of 1.0 is not equivalent to probability of 1.0. Care should be taken to distinguish between real behavioral preferences of fishes based on distributional occurrence from abundance (relative or absolute size) in a stream.
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Kennedy, Brian P., Joel D. Blum, Carol L. Folt, and Keith H. Nislow. "Using natural strontium isotopic signatures as fish markers: methodology and application." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 11 (November 1, 2000): 2280–92. http://dx.doi.org/10.1139/f00-206.

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To distinguish Atlantic salmon (Salmo salar) populations in tributaries of the Connecticut River, we studied the incorporation and stability of Sr isotopes in juvenile salmon. We established the geologic basis for unique isotopic signatures in 29 salmon sites. Stream-specific Sr isotopic ratios (87Sr/86Sr) were found in calcified tissues of salmon parr within 3 months of stocking. We found little seasonal variation in the Sr signatures of stream water or fish tissue. There were no significant differences among the Sr signatures of otoliths, scales, and vertebrae. For mature salmon raised under constant conditions, 70% of the Sr isotopic signature in calcified tissues was derived from food sources. We developed a criterion for identifying moving fish based upon the isotopic variability of genetically marked fish. Applying this criterion to our streams, 7% of the fish in our study had incorporated Sr from multiple streams. Strontium isotopes distinguished all 8 regions in the White River basin and 7 of the 10 regions in the West River basin. When watersheds are considered together, Sr isotopes differentiated 11 unique signatures from 18 regions. We conclude that Sr isotopes are an effective marking tool and discuss ways in which they can be combined with other marking techniques over larger spatial scales.
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Sweka, John A., Tyler Wagner, Jason Detar, and David Kristine. "Combining Field Data With Computer Simulations to Determine a Representative Reach for Brook Trout Assessment." Journal of Fish and Wildlife Management 3, no. 2 (December 1, 2012): 209–22. http://dx.doi.org/10.3996/032012-jfwm-027.

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Abstract Fisheries biologists often use backpack electrofishing to sample stream fish. A common goal of sampling is to estimate density and/or biomass to make inferences about the status and trends of fish populations. One challenge when estimating population size is determining an appropriate site or reach length to sample. In this study, we empirically determined the required length of stream that needs to be sampled, assuming the study design is one site per stream, in order to achieve a desired level of accuracy for brook trout density and biomass estimates in Pennsylvania headwater streams. Long sample reaches (600 m) were chosen on seven first to third order streams and these sites were broken into twelve 50-m subreaches. Each subreach was sampled by removal electrofishing techniques until either five electrofishing passes were completed or no brook trout were captured. The total density and biomass of brook trout over all 50-m subreaches was considered the “true” density and biomass for the entire reach. We then performed computer simulations in which various numbers of 50-m subreaches were randomly selected and catches from each subreach were summed within the first three electrofishing passes to simulate removal sampling of site lengths ranging from 50 to 550 m. Population estimates were made using a removal estimator and density and biomass were calculated using various stratification schemes based on fish age and size. Estimates of density and biomass were then compared to the true values to assess the possible range in bias of estimates for a given reach length. Results from our simulations suggest a 200- to 250-m-long or a 400- to 450-m-long stream reach or site is needed to estimate brook trout density and biomass within 50% and 25%, respectively, of the true density and biomass. This information and our methodology will be valuable to fisheries managers in developing standardized protocols for assessing trout populations in small streams.
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Cantin, Ariane, Anne Farineau, Darren J. Bender, and John R. Post. "Predicting distribution, production, recreational fishing demand, and conservation concern of Indigenous rainbow trout populations based on landscape characteristics." Canadian Journal of Fisheries and Aquatic Sciences 78, no. 8 (August 2021): 1096–108. http://dx.doi.org/10.1139/cjfas-2020-0323.

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Landscape ecology has mainly been integrated in aquatic science to describe patterns and processes in stream networks, but many lakes are connected through their tributaries and are also impacted by their position and connectivity within the watershed. This information on lake characteristics can be used by inland fisheries managers that oversee large landscapes comprising many waterbodies to predict (i) species composition; (ii) population dynamics and productivity; (iii) recreational fishing pressure; and (iv) overall conservation concern. We developed a methodology to assess these four items for the rainbow trout (Oncorhynchus mykiss) fishery of British Columbia by presenting a case study focused on the Clearwater and North Thompson watersheds using the following: the connectivity of lakes within the stream network to predict rainbow trout presence, stream order and lake area to estimate habitat availability and predict population dynamics and productivity (supply), and travel time from population centres to predict recreational fishing pressure (demand). By incorporating connectivity and environmental proxies of habitat, we explore patterns in population dynamics that can be used by fisheries managers to identify populations sensitive to overfishing or disturbance.
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Fernandes, Isabel, Ana Pereira, José Trabulo, Cláudia Pascoal, Fernanda Cássio, and Sofia Duarte. "Microscopy- or DNA-based analyses: Which methodology gives a truer picture of stream-dwelling decomposer fungal diversity?" Fungal Ecology 18 (December 2015): 130–34. http://dx.doi.org/10.1016/j.funeco.2015.08.005.

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Vondracek, B., and D. R. Longanecker. "Habitat selection by rainbow trout Oncorhynchus mykiss in a California stream: implications for the Instream Flow Incremental Methodology." Ecology of Freshwater Fish 2, no. 4 (December 1993): 173–86. http://dx.doi.org/10.1111/j.1600-0633.1993.tb00100.x.

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Kim, Suyeon, Sang-Woo Lee, Se-Rin Park, Yeeun Shin, and Kyungjin An. "Socioeconomic Risks and Their Impacts on Ecological River Health in South Korea: An Application of the Analytic Hierarchy Process." Sustainability 13, no. 11 (June 2, 2021): 6287. http://dx.doi.org/10.3390/su13116287.

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It is imperative to develop a methodology to identify river impairment sources, particularly the relative impact of socioeconomic sources, to enhance the efficiency of various river restoration schemes and policies and to have an internal diagnosis system in place. This study, therefore, aims to identify and analyze the relative importance of the socioeconomic factors affecting river ecosystem impairment in South Korea. To achieve this goal, we applied the Analytical Hierarchy Process (AHP) to evaluate expert judgement of the relative importance of different socioeconomic factors influencing river ecosystem impairment. Based on a list of socioeconomic factors influencing stream health, an AHP questionnaire was prepared and administered to experts in aquatic ecology. Our analysis reveals that secondary industries form the most significant source of stream ecosystem impairment. Moreover, the most critical socioeconomic factors affecting stream impairment are direct inflow pollution, policy implementation, and industrial wastewater. The results also suggest that the AHP is a rapid and robust approach to assessing the relative importance of different socioeconomic factors that affect river ecosystem health. The results can be used to assist decision makers in focusing on actions to improve river ecosystem health.
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Ferguson, C. M., N. J. Ashbolt, and D. A. Deere. "Prioritisation of catchment management in the Sydney catchment - construction of a pathogen budget." Water Supply 4, no. 2 (April 1, 2004): 35–38. http://dx.doi.org/10.2166/ws.2004.0025.

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A methodology has been developed to apply the materials budget concept, used in sediment and nutrient studies, to construct a pathogen budget for drinking water catchments, taking into consideration pathogen origin, deposition, inactivation and movement within a catchment. These processes can be described in terms of stocks (pathogens) and flows (movement of stocks). In south-eastern Australia, the majority of pathogen loading to major tributaries was predicted to occur during and after high intensity rainfall events where in-stream resuspension was not of great relative importance. In contrast, during dry weather the transit time within the studied catchment was sufficiently long that in-stream processes became relatively important. Total pathogen unit (TPU) budgets were constructed for the parasitic protozoa Cryptosporidium and Giardia. This approach enables water utility managers to identify those catchment segments and processes that are contributing or removing the greatest load of pathogens, and thus where management options will be most effective. With improved knowledge of pathogen ecology this approach can be further refined to provide budgets of infectious pathogen units (IPU), more directed to public health risk endpoints.
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Keydoszius, Renee, and Mary Haque. "DESIGNING A CHILDREN'S WATER GARDEN IN THE SOUTH CAROLINA BOTANICAL GARDEN AS AN OUTDOOR LEARNING LAB FOR ENVIRONMENTAL EDUCATION." HortScience 40, no. 3 (June 2005): 873c—873. http://dx.doi.org/10.21273/hortsci.40.3.873c.

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During the fall semester of 2003, a Clemson University introductory landscape design class collaborated with South Carolina Botanical Gardens staff and coordinators of Sprouting Wings, an after school gardening program for at risk children, to design an exploratory Children's Garden within the Botanical Gardens. Project methodology included site selection, research, site analysis, conceptual diagrams, preliminary designs, and full color renderings of final designs. Students periodically presented their progress on the project to the clients in order to receive feedback and advice. One of the thirteen themed gardens designed is the Wonders of Water Garden. Project goals were to create a center for environmental education addressing current issues in water quality such as pollution from industries and runoff, erosion, stream degradation, and sedimentation resulting from land clearing and development. Visitors will be able to observe and learn about various environmental factors affecting native plant and animal life. The garden will help to teach environmental stewardship and understanding of general aquatic ecology. An observation deck, serpentine bridge through a bog garden, and a bridge crossing a waterfall stream will allow close observation of native aquatic plant and animal life. The Wonders of Water Garden design includes the bog garden and carnivorous garden that border two pools connected by a stream of small waterfalls which may be used to create awareness of current water quality issues and serve as a model to teach visitors the importance of water and aquatic plants in the environment.
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Barros, Vinicius Deganutti De, István Waltner, Rakotoarivony A. Minoarimanana, Gábor Halupka, Renáta Sándor, Dana Kaldybayeva, and Györgyi Gelybó. "SpatialAquaCrop, an R Package for Raster-Based Implementation of the AquaCrop Model." Plants 11, no. 21 (October 29, 2022): 2907. http://dx.doi.org/10.3390/plants11212907.

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Modeling crop water use and soil moisture availability is becoming increasingly critical, particularly in light of recent drought events. Our study focuses on the spatial application of the AquaCrop model, using a raster-based approach in an R-based environment. The formulated methodology was initially applied and tested on two point-based examples in the Central region of Hungary, followed by the spatial application of the model at the Rákos Stream catchment in the same region. For evaluation purposes, we also utilized satellite-based NDVI data. The results showed that there is a strong correlation between NDVI values and the model-based biomass estimation. We also found that the model simulated the soil moisture content fairly well, with a correlation coefficient of 0.82. While our results support the validity of the applied methodology, it is also clear that input data availability and quality are still critical issues in spatial application of the AquaCrop model.
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Dissertations / Theses on the topic "Stream ecology – Methodology"

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Vinçon, Gilles. "Comparaison de la faune benthique des vallees d'aure et d'ossau, en vue de l'elaboration d'une methodologie de surveillance des cours d'eau de montagne." Toulouse 3, 1987. http://www.theses.fr/1987TOU30003.

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Mise au point d'une methode de surveillance des cours d'eau de montagne fondee sur l'etude la faune macroinvertebree benthique. L'hypothese initiale etait que l'on pouvait prevoir le peuplement originel d'une station donnee grace a la seule connaissance de ces caracteristiques constantes (altitude, pente, surface du bassin versant. . . ). Comparaison detaillee du peuplement des vallees d'aure et d'ossau
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Books on the topic "Stream ecology – Methodology"

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Plotnikoff, Robert W. Benthic macroinvertebrate biological monitoring protocols for rivers and streams. 2nd ed. Olympia, Wash: Washington State Dept. of Ecology, 2001.

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2

Steve, Leonard, and United States. Bureau of Land Management. Denver Service Center., eds. Procedures for ecological site inventory with special reference to riparian-wetland sites. Denver, CO: U.S. Dept. of the Interior, Bureau of Land Management, Service Center, 1992.

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Wiseman, Chad D. Multi-metric index development for biological monitoring in Washington State streams. Olympia, WA: Washington State Dept. of Ecology, 2003.

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Wiseman, Chad D. Multi-metric index development for biological monitoring in Washington State streams. 2nd ed. Olympia, WA: Washington State Dept. of Ecology, 2003.

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Wiseman, Chad D. Multi-metric index development for biological monitoring in Washington State streams. Olympia, WA: Washington State Dept. of Ecology, 2003.

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Wiseman, Chad D. Multi-metric index development for biological monitoring in Washington State streams. 2nd ed. Olympia, WA: Washington State Dept. of Ecology, 2003.

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Wiseman, Chad D. Multi-metric index development for biological monitoring in Washington State streams. 2nd ed. Olympia, WA: Washington State Dept. of Ecology, 2003.

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8

Methods in stream ecology. San Diego: Academic Press, 1996.

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Richard, Hauer F., and Lamberti Gary Anthony, eds. Methods in stream ecology. 2nd ed. San Diego, Calif: Academic Press/Elsevier, 2006.

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Lamberti, Gary A., and F. Richard Hauer. Methods in Stream Ecology. Elsevier Science & Technology Books, 1998.

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