نتایج جستجو برای: stream habitat

تعداد نتایج: 110551  

Journal: :اکو هیدرولوژی 0
رفعت زارع بیدکی استادیار، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد مریم مهدیانفرد کارشناس ارشد آبخیزداری، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد افشین هنربخش دانشیار، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد حسین زینی وند استادیار، دانشکدۀ منابع طبیعی، دانشگاه لرستان، خرم‏آباد

commonly used environmental flow evaluation techniques range in complexity. some requires stream flow records alone, and some accounts for the habitat requirements of individual species life-stages and physical characteristics of the stream. hydrological based methods for environmental flow assessment are the first step in planning for environmental allocation in developing countries. for deter...

Journal: :Ecological applications : a publication of the Ecological Society of America 2014
David J Lawrence Ben Stewart-Koster Julian D Olden Aaron S Ruesch Christian E Torgersen Joshua J Lawler Don P Butcher Julia K Crown

Predicting how climate change is likely to interact with myriad other stressors that threaten species of conservation concern is an essential challenge in aquatic ecosystems. This study provides a framework to accomplish this task in salmon-bearing streams of the northwestern United States, where land-use-related reductions in riparian shading have caused changes in stream thermal regimes, and ...

Journal: :River Research and Applications 2022

Abstract In addition to the hydromorphological pressure on ecological conditions of free‐flowing river courses, increasing water temperature is affecting bodies, particularly by changing freshwater community compositions. The low discharge numerous European rivers in dry and hot hydrological year 2022 proves this relevance. Therefore, assessment tools such as habitat modeling should take these ...

2006
Mark C. Urban David K. Skelly Denise Burchsted William Price Sarah Lowry

Rapid urbanization throughout the world is expected to cause extensive loss of biodiversity in the upcoming decades. Disturbances associated with urbanization frequently operate over multiple spatial scales such that local species extirpations have been attributed both to localized habitat degradation and to regional changes in land use. Urbanization also may shape stream communities by restric...

2014
S. Lynsey Long Rhett Jackson

Stream mesoscale habitats have systematic topographic relationships to hyporheic flow patterns, which may create predictable temperature variation between mesoscale habitat types. We investigated whether systematic differences in temperature metrics occurred between mesoscale habitats within reaches of small streams tributary to the upper Little Tennessee River, southern Appalachians. Surface w...

2014
Robert S McCann Joseph P Messina David W MacFarlane M Nabie Bayoh John M Vulule John E Gimnig Edward D Walker

BACKGROUND Predictive models of malaria vector larval habitat locations may provide a basis for understanding the spatial determinants of malaria transmission. METHODS We used four landscape variables (topographic wetness index [TWI], soil type, land use-land cover, and distance to stream) and accumulated precipitation to model larval habitat locations in a region of western Kenya through two...

Journal: :Ecological applications : a publication of the Ecological Society of America 2011
Christy R Violin Peter Cada Elizabeth B Sudduth Brooke A Hassett David L Penrose Emily S Bernhardt

Streams, as low-lying points in the landscape, are strongly influenced by the stormwaters, pollutants, and warming that characterize catchment urbanization. River restoration projects are an increasingly popular method for mitigating urban insults. Despite the growing frequency and high expense of urban stream restoration projects, very few projects have been evaluated to determine whether they...

 Investigation of ecological, hydrological status and habitat Suitability of river is one of the key elements in river ecosystem management. In this regard, in the present study, in order to evaluate the ecological sustainable conditions in Zarrin-Gol River of Golestan Province, during stepwise calculations, echo-hydraulic and hydromorphocological analysis of the habitat of Capoeta gracilis (Ke...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه هنر اصفهان - دانشکده معماری و شهرسازی 1389

reserches show that relationship between human and residential places is based upo both emotional and identity structures. in other words, habitat place is not only the creator of a part of humanistic identity but also form a kind of sentimental and emotional bond that may result in tendency to maintain closeness to a specific place. therefor, formaton of emotional and identity relationship wit...

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