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https://www.readbyqxmd.com/read/28340479/additive-effects-prevail-the-response-of-biota-to-multiple-stressors-in-an-intensively-monitored-watershed
#1
Alexander Gieswein, Daniel Hering, Christian K Feld
Freshwater ecosystems are impacted by a range of stressors arising from diverse human-caused land and water uses. Identifying the relative importance of single stressors and understanding how multiple stressors interact and jointly affect biology is crucial for River Basin Management. This study addressed multiple human-induced stressors and their effects on the aquatic flora and fauna based on data from standard WFD monitoring schemes. For altogether 1095 sites within a mountainous catchment, we used 12 stressor variables covering three different stressor groups: riparian land use, physical habitat quality and nutrient enrichment...
March 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28324648/influence-of-modern-stormwater-management-practices-on-transport-of-road-salt-to-surface-waters
#2
Joel W Snodgrass, Joel Moore, Steven M Lev, Ryan E Casey, David R Ownby, Robert F Flora, Grant Izzo
Application of road salts in regions with colder climates is leading to ground and surface water contamination. However, we know little about how modern stormwater management practices affect the movement of road salt through urban watersheds. We investigated groundwater contamination and transport of road salts at two stormwater ponds in Baltimore County, Maryland. In association with the ponds, we documented a plume of contaminated groundwater that resulted in Cl- loadings to the adjacent stream of 6,574 to 40,008 kg Cl- per winter, depending on winter snowfall...
March 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28318825/riparian-erosion-vulnerability-model-based-on-environmental-features
#3
Alejandra Botero-Acosta, Maria L Chu, Jorge A Guzman, Patrick J Starks, Daniel N Moriasi
Riparian erosion is one of the major causes of sediment and contaminant load to streams, degradation of riparian wildlife habitats, and land loss hazards. Land and soil management practices are implemented as conservation and restoration measures to mitigate the environmental problems brought about by riparian erosion. This, however, requires the identification of vulnerable areas to soil erosion. Because of the complex interactions between the different mechanisms that govern soil erosion and the inherent uncertainties involved in quantifying these processes, assessing erosion vulnerability at the watershed scale is challenging...
March 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28318692/characterization-and-source-identification-of-nitrogen-in-a-riverine-system-of-monsoon-climate-region-china
#4
Jie Yuan, Siyue Li, Xi Han, Qiuyang Chen, Xiaoli Cheng, Quanfa Zhang
There are increasing concerns in nitrogen (N) pollution worldwide, especially in aquatic ecosystems, and thus quantifying its sources in waterways is critical for pollution prevention and control. In this study, we investigated the spatio-temporal variabilities of inorganic N concentration (i.e., NO3(-), NH4(+)) and total dissolved N (TDN) and identified their sources in waters and suspended matters using an isotopical approach in the Jinshui River, a river with a length of 87km in the monsoon-climate region of China...
March 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28303182/determining-the-factors-affecting-the-distribution-of-muscari-latifolium-an-endemic-plant-of-turkey-and-a-mapping-species-distribution-model
#5
Hatice Yilmaz, Osman Yalçın Yilmaz, Yaşar Feyza Akyüz
Species distribution modeling was used to determine factors among the large predictor candidate data set that affect the distribution of Muscari latifolium, an endemic bulbous plant species of Turkey, to quantify the relative importance of each factor and make a potential spatial distribution map of M. latifolium. Models were built using the Boosted Regression Trees method based on 35 presence and 70 absence records obtained through field sampling in the Gönen Dam watershed area of the Kazdağı Mountains in West Anatolia...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28285853/tracking-climate-change-in-oligotrophic-mountain-lakes-recent-hydrology-and-productivity-synergies-in-lago-de-sanabria-nw-iberian-peninsula
#6
Margarita Jambrina-Enríquez, Clemente Recio, José Carlos Vega, Blas Valero-Garcés
Mountain lakes are particularly sensitive to global change as their oligotrophic conditions may be rapidly altered after reaching an ecological threshold, due to increasing human impact and climate change. Sanabria Lake, the largest mountain lake in the Iberian Peninsula and with a recent history of increased human impact in its watershed, provides an opportunity to investigate recent trends in an oligotrophic, hydrologically-open mountain lake, and their relationship with climate, hydrological variability and human pressure...
March 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28275984/effects-of-human-induced-environmental-changes-on-benthic-macroinvertebrate-assemblages-of-wetlands-in-lake-tana-watershed-northwest-ethiopia
#7
Ayenew Gezie, Wassie Anteneh, Eshete Dejen, Seid Tiku Mereta
Wetlands of Lake Tana Watershed provide various ecological and socioeconomic functions. However, they are losing their vigor at alarming rate due to unwise management. Hence, there is an urgent need to monitor and assess these resources so as to identify the major drivers of its degradation and to provide information for management decisions. In this context, we aimed to assess the effects of human activities on macroinvertebrate assemblages of wetlands in Lake Tana Watershed. Biotic and abiotic data were collected from 46 sampling sites located in eight wetlands...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28273834/identifying-and-classifying-pollution-hotspots-to-guide-watershed-management-in-a-large-multiuse-watershed
#8
Fangli Su, David Kaplan, Lifeng Li, Haifu Li, Fei Song, Haisheng Liu
In many locations around the globe, large reservoir sustainability is threatened by land use change and direct pollution loading from the upstream watershed. However, the size and complexity of upstream basins makes the planning and implementation of watershed-scale pollution management a challenge. In this study, we established an evaluation system based on 17 factors, representing the potential point and non-point source pollutants and the environmental carrying capacity which are likely to affect the water quality in the Dahuofang Reservoir and watershed in northeastern China...
March 3, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28264774/combined-effects-of-climate-and-land-management-on-watershed-vegetation-dynamics-in-an-arid-environment
#9
Peilong Liu, Lu Hao, Cen Pan, Decheng Zhou, Yongqiang Liu, Ge Sun
Leaf area index (LAI) is a key parameter to characterize vegetation dynamics and ecosystem structure that determines the ecosystem functions and services such as clean water supply and carbon sequestration in a watershed. However, linking LAI dynamics and environmental controls (i.e., coupling biosphere, atmosphere, and anthroposphere) remains challenging and such type of studies have rarely been done at a watershed scale due to data availability. The present study examined the spatial and temporal variations of LAI for five ecosystem types within a watershed with a complex topography in the Upper Heihe River Basin, a major inland river in the arid and semi-arid western China...
March 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28251452/valuation-of-ecosystem-services-of-commercial-shrub-willow-salix-spp-woody-biomass-crops
#10
Alison Bressler, Philippe Vidon, Paul Hirsch, Timothy Volk
The development of shrub willow as a bioenergy feedstock contributes to renewable energy portfolios in many countries with temperate climates and marginal croplands due to excessive moisture. However, to fully understand the potential of shrub willow as an alternative crop on marginal cropland, more research is needed to understand the potential of shrub willow for providing a variety of ecosystem services. At the same time, there is much need for research developing strategies to value ecosystem services beyond conventional valuation systems (e...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28249754/spatiotemporal-variation-of-watershed-health-propensity-through-reliability-resilience-vulnerability-based-drought-index-case-study-shazand-watershed-in-iran
#11
Seyed Hamidreza Sadeghi, Zeinab Hazbavi
Quantitative response of the watershed health to climate variability is of critical importance for watershed managers. However, existing studies seldom considered the impact of climate variability on watershed health. The present study therefore aimed to analyze the temporal and spatial variability of reliability (Rel), resilience (Res) and vulnerability (Vul) indicators in node years of 1986, 1998, 2008 and 2014 in connection with Standardized Precipitation Index (SPI) for 24 sub-watersheds in the Shazand Watershed of Markazi Province in Iran...
February 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28248969/development-and-validation-of-risk-profiles-of-west-african-rural-communities-facing-multiple-natural-hazards
#12
Daniel Asare-Kyei, Fabrice G Renaud, Julia Kloos, Yvonne Walz, Jakob Rhyner
West Africa has been described as a hotspot of climate change. The reliance on rain-fed agriculture by over 65% of the population means that vulnerability to climatic hazards such as droughts, rainstorms and floods will continue. Yet, the vulnerability and risk levels faced by different rural social-ecological systems (SES) affected by multiple hazards are poorly understood. To fill this gap, this study quantifies risk and vulnerability of rural communities to drought and floods. Risk is assessed using an indicator-based approach...
2017: PloS One
https://www.readbyqxmd.com/read/28242115/an-economic-inquisition-of-water-quality-trading-programs-with-a-case-study-of-jordan-lake-nc
#13
Marzieh Motallebi, Dana L Hoag, Ali Tasdighi, Mazdak Arabi, Deanna L Osmond
A water quality trading (WQT) program was promulgated in North Carolina to address water quality issues related to nutrients in the highly urbanizing Jordan Lake Watershed. Although WQT programs are appealing in theory, the concept has not proved feasible in several attempts between point and nonpoint polluters in the United States. Many application hurdles that create wedges between success and failure have been evaluated in the literature. Most programs, however, face multiple hurdles; eliminating one may not clear a pathway to success...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28242113/evaluating-the-impacts-of-agricultural-land-management-practices-on-water-resources-a-probabilistic-hydrologic-modeling-approach
#14
A F Prada, M L Chu, J A Guzman, D N Moriasi
Evaluating the effectiveness of agricultural land management practices in minimizing environmental impacts using models is challenged by the presence of inherent uncertainties during the model development stage. One issue faced during the model development stage is the uncertainty involved in model parameterization. Using a single optimized set of parameters (one snapshot) to represent baseline conditions of the system limits the applicability and robustness of the model to properly represent future or alternative scenarios...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28238198/the-social-historical-and-institutional-contingencies-of-dam-removal
#15
F J Magilligan, C S Sneddon, C A Fox
Environmental managers in the United States and elsewhere are increasingly perceiving dam removal as a critical tool for river restoration and enhancing watershed resilience. In New England, over 125 dams have been dismantled for ecological and economic rationales. A surprising number of these removals, including many that are ongoing, have generated heated conflicts between restoration proponents and local communities who value their dammed landscapes. Using a comparative case study approach, we examine the environmental conflict around efforts to remove six dams in New England...
February 25, 2017: Environmental Management
https://www.readbyqxmd.com/read/28229194/screening-level-assessment-of-metal-concentrations-in-streambed-sediments-and-floodplain-soils-within-the-grand-lake-watershed-in-northeastern-oklahoma-usa
#16
Ean M Garvin, Cas F Bridge, Meredith S Garvin
Metal releases have been received by the Grand Lake watershed from the Tri-State Mining District (TSMD) since the mid 1800s. To address data gaps in metal distributions in the Oklahoma portion of the watershed, streambed sediment and floodplain soil was sampled on various streams. The <63-µm fraction was analyzed for Cd, Pb, and Zn concentrations by portable X-ray fluorescence spectroscopy and inductively coupled plasma-mass spectrometry. Mean metal concentration results at reference transects indicated that background sediment/soil concentrations for Cd, Pb, and Zn within the watershed were 0...
February 22, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28223529/social-ecological-network-analysis-of-scale-mismatches-in-estuary-watershed-restoration
#17
Jesse S Sayles, Jacopo A Baggio
Resource management boundaries seldom align with environmental systems, which can lead to social and ecological problems. Mapping and analyzing how resource management organizations in different areas collaborate can provide vital information to help overcome such misalignment. Few quantitative approaches exist, however, to analyze social collaborations alongside environmental patterns, especially among local and regional organizations (i.e., in multilevel governance settings). This paper develops and applies such an approach using social-ecological network analysis (SENA), which considers relationships among and between social and ecological units...
March 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28222351/the-land-morphology-approach-to-flood-risk-mapping-an-application-to-portugal
#18
N S Cunha, M R Magalhães, T Domingos, M M Abreu, C Küpfer
In the last decades, the increasing vulnerability of floodplains is linked to societal changes such as population density growth, land use changes, water use patterns, among other factors. Land morphology directly influences surface water flow, transport of sediments, soil genesis, local climate and vegetation distribution. Therefore, the land morphology, the land used and management directly influences flood risks genesis. However, attention is not always given to the underlying geomorphological and ecological processes that influence the dynamic of rivers and their floodplains...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28222039/building-multi-country-collaboration-on-watershed-management-lessons-on-linking-environment-and-public-health-from-the-western-balkans
#19
Maryann R Cairns, Clayton E Cox, Jose Zambrana, Joseph Flotemersch, Alexis Lan, Anna Phillips, Gordana Kozhuharova, Mihallaq Qirjo, Marta Szigeti Bonifert, Lek Kadeli
Community-based watershed resilience programs that bridge public health and environmental outcomes often require cross-boundary, multi-country collaboration. The CRESSIDA project, led by the Regional Environmental Center for Central and Eastern Europe (REC) and supported by the US Environmental Protection Agency (EPA), forwards a resilience-focused approach for Western Balkan communities in the Drini and Drina river watersheds with the goal of safeguarding public health and the environment. The initial phases of this project give a contextualized example of how to advance resilience-driven environmental health goals in Western Balkan communities, and experience within the region has garnered several theme areas that require focus in order to promote a holistic watershed management program...
March 1, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28215078/contribution-of-leaf-litter-to-nutrient-export-during-winter-months-in-an-urban-residential-watershed
#20
Anika R Bratt, Jacques C Finlay, Sarah E Hobbie, Benjamin D Janke, Adam C Worm, Kathrine L Kemmitt
Identification of nonpoint sources of nitrogen (N) and phosphorus (P) in urban systems is imperative to improving water quality and better managing eutrophication. Winter contributions and sources of annual N and P loads from urban watersheds are poorly characterized in northern cities because monitoring is often limited to warm-weather periods. To determine the winter export of N and P, we monitored stormwater outflow in a residential watershed in Saint Paul, Minnesota during 2012-2014. Our data demonstrate that winter melt events contribute a high percentage of annual N and P export (50%)...
March 21, 2017: Environmental Science & Technology
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