scholarly journals Effects of riparian vegetation removal on nutrient retention in a Mediterranean stream

2000 ◽  
Vol 19 (4) ◽  
pp. 609-620 ◽  
Author(s):  
Francesc Sabater ◽  
Andrea Butturini ◽  
Eugènia MartÍ ◽  
Isabel Muñoz ◽  
Anna Romaní ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Nutrient Retention ◽  
Vegetation Removal ◽  
Mediterranean Stream

The effect of riparian restoration on channel complexity and soil nutrients

2017 ◽  
Vol 68 (11) ◽  
pp. 2041 ◽  
Author(s):  
J. Patrick Laceby ◽  
Nina E. Saxton ◽  
Kate Smolders ◽  
Justine Kemp ◽  
Stephen J. Faggotter ◽  
...  
Keyword(s):  
Soil Nutrients ◽  
Riparian Vegetation ◽  
Soil Nutrient ◽  
Nutrient Retention ◽  
River Channel ◽  
Channel Width ◽  
Riparian Restoration ◽  
Nitrogen And Phosphorus ◽  
Elemental Geochemistry ◽  
Channel Complexity

Restoration of riparian vegetation may reduce nutrient and sediment contamination of waterways while potentially enhancing stream channel complexity. Accordingly, the present study used a paired-site approach to investigate the effects of mature regrowth riparian vegetation on river channel morphology and soil nutrients (i.e. nitrogen and phosphorus), comparing four sites of degraded (pasture) and reforested reaches. A revised rapid assessment of riparian condition (RARC) was used to validate the site pairings. Riparian soil nutrient and elemental geochemistry were compared between paired sites, along with two parameters of channel width complexity and two for channel slope complexity. The RARC analysis confirmed the validity of the paired site design. The elemental geochemistry results indicated that underlying geology may affect the paired site analyses. Reaches with mature regrowth vegetation had greater channel width complexity but no difference in their riverbed slope complexity. In addition, degraded reaches had higher soil nutrient (i.e. nitrogen and phosphorus) concentrations, potentially indicative of the greater nutrient retention of pasture grass sites compared with mature regrowth forested reaches with less ground cover. Overall, the present study indicates that restoring mature regrowth riparian vegetation may increase river channel width complexity, although it may require canopy management to optimise the nutrient retention potential necessary to maximise the effect of riparian restoration strategies on freshwater environments.

VEgetation NUtrient-retention Service (VENUS) index: an indicator to assess favourable conditions for nutrient retention by vegetation.

2020 ◽  
Author(s):  
Davide Murgese
Keyword(s):  
Water Quality ◽  
Riparian Vegetation ◽  
Nutrient Retention ◽  
Water Bodies ◽  
Complete Analysis ◽  
Retention Performance ◽  
Hydrogeological Model ◽  
Management Scenarios ◽  
Management Measures ◽  
Definition Of

<p>Ecosystems role in preserving water resources is acknowledged by EU Water Framework Directive 2000/60/EC and by Groundwater Directive 2006/118/EC. In this view nutrient concentration represent a critical aspect with regard to water quality and eutrophication. Nitrate pollution is specifically addressed by the Nitrate Directive 91/676/EEC, which provides nitrate management rules for farming activities, defines nitrate vulnerable zones and gives indications on nitrate monitoring in water bodies.</p><p>To preserve water quality levels an important role is played by Riparian Buffer Zones (RBZ) through the provision of the Ecosystem Service (ES) nutrient retention, the uptake process operated by plant roots. Research has shown how ES valuation is a very effective approach to support land management process, as it allows a better understanding of the importance of the role of ecosystems in guaranteeing wellbeing conditions for human communities and for the environment.</p><p>In order to perform a complete assessment of ES, the use of maps only providing information on processes occurring at/above the surface (e.g land use maps, or ecosystem maps, or ecosystem function maps) does not allow a complete analysis of underground dynamics.</p><p>In the case of the valuation of the ES “nutrient retention” provided by RBZ it is necessary to include the hydrogeological model and its links with the riverine network. The simple presence/absence of vegetation, or even a detailed vegetation classification map, cannot provide a complete description of all conditions required to fully assess this ES, as information on groundwater flow, sediments and soils characteristics is needed.</p><p>For the Riparian Vegetation Management Plan of the Gesso Stura Riverine Park a specific index to study vegetation contribution to nutrient retention was introduced: the VEgetation NUtrient-retention Service (VENUS) Index. This index provides land managers a semi-quantitative indication on the spatial distribution of “best conditions” (suitability map) for nutrient retention by vegetation; it is based on a simple set of parameters representing the main factors controlling the interactions between vegetation roots and water flows (runoff and groundwater) from surrounding areas towards water bodies.</p><p>The application of the VENUS Index improved the definition of management measures for riparian vegetation and allowed reaching the following results: (1) identification of homogeneous sectors in terms of RBZ relevance for nutrient retention; (2) assessment of different RBZ management scenarios with regard to nutrient retention performance; (3) definition of specific management measures to preserve and/or foster the provision of nutrient retention.</p>

scholarly journals Effect of the riparian vegetation removal on the trophic network of Neotropical stream fish assemblage

2018 ◽  
Vol 13 (1) ◽  
pp. 1 ◽  
Author(s):  
Pedro Sartori Manoel ◽  
Virginia Sanches Uieda
Keyword(s):  
Fish Assemblage ◽  
Riparian Vegetation ◽  
Niche Overlap ◽  
Forest Fragment ◽  
Vegetation Removal ◽  
Trophic Networks ◽  
Key Factor ◽  
Trophic Network ◽  
Dry Seasons ◽  
Food Niche

The study of the diet of fish is an important tool to assess different levels of environmental degradation, since the availability of food in the environment is a key factor for the fish occurrence. The removal of riparian vegetation usually degrades environmental quality, as this vegetation has an important role in providing energy to the ecosystem. This study investigates the effects of the removal of riparian vegetation on the fish assemblage trophic network. The study was carried out in two stretches of a southeastern Brazilian stream, one in a forest fragment and another in a pasture, during the wet and dry seasons of 2014. We analyzed the items consumed by each fish species using the frequency of occurrence and area of each item, which were combined to calculate the alimentary index, which was used to determine the food niche overlap of the fish and the specialization index of the trophic network. Aquatic Hexapoda, vegetal debris and organic matter dominated the trophic network of the two stretches. We detected higher values of food niche overlap in the forested stretch and more complex trophic networks in the pasture stretch. We found few seasonal variations in the items consumed and calculated indices in both stretches studied. The presence of grass on the banks in the pasture stretch and the importation of food resources from the upstream area may have provided a higher diversity of resources and consequently showed a more complex trophic network when compared to the forested stretch.

scholarly journals Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Lívia Helena Tonella ◽  
Rosa Maria Dias ◽  
Oscar Barroso Vitorino Junior ◽  
Rosemara Fugi ◽  
Angelo Antonio Agostinho
Keyword(s):  
River Basin ◽  
Riparian Vegetation ◽  
Conservation Status ◽  
Hydrological Regime ◽  
Paraná River ◽  
Remarkable Effect ◽  
Parana River ◽  
Vegetation Removal ◽  
La Plata Basin ◽  
Paraná River Basin

ABSTRACT Brycon orbignyanus is an endemic species from La Plata basin whose stocks have been presenting significant reductions throughout the Paraná River. Brycon orbignyanus is categorized as an endangered species. This study evaluated aspects of the bio-ecology of this species that may be related to this threat, highlighting its distribution, abundance, and diet as well as the corresponding relationships between its recruitment and flood regimes. Data were obtained from different parts of the upper Paraná River (stretches free and regulated by dams) from 1986 to 2010 with more detailed data collected from the free remnant of this basin. The results indicate that no records for species exist at more than half of the sampling points located in dam-regulated sections of the Paraná River, whereas specimens were collected from 75% sites in the free plain remnant. We observed a remarkable effect of the hydrological regime on recruitment as well as distinct food demands during ontogenetic development, with adults almost exclusively consuming fruits and seeds, revealing that these individuals are supported by riparian vegetation. Thus, it is concluded that changes in the natural flood regime as well as riparian vegetation removal threaten B. orbignyanus populations in the Paraná River basin.

Wood and leaf debris input in a Mediterranean stream: The influence of riparian vegetation

2001 ◽  
Vol 153 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Sergi Sabater ◽  
Susana Bernal ◽  
Andrea Butturini ◽  
Esther Nin ◽  
Francesc Sabater
Keyword(s):  
Riparian Vegetation ◽  
Mediterranean Stream

Do crayfish affect stream ecosystem response to riparian vegetation removal?

2021 ◽  
Author(s):  
Maura P. Dudley ◽  
Kelsey Solomon ◽  
Seth Wenger ◽  
C. Rhett Jackson ◽  
Mary Freeman ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Ecosystem Response ◽  
Stream Ecosystem ◽  
Vegetation Removal

scholarly journals Efeito da Integridade Ambiental Sobre a Assimetria Flutuante em Erythrodiplax basalis (Libellulidae: Odonata) (Kirby)

2011 ◽  
Vol 4 (3) ◽  
pp. 103-107 ◽  
Author(s):  
Eva Ferreira Dos Reis ◽  
Nelson Silva Pinto ◽  
Fernando Geraldo Carvalho ◽  
Leandro Juen
Keyword(s):  
Fluctuating Asymmetry ◽  
Riparian Vegetation ◽  
Wing Length ◽  
Dispersal Ability ◽  
Vegetation Removal ◽  
Disturbed Areas ◽  
Dispersal Capability ◽  
Wing Width ◽  
Low Levels ◽  
Environmental Integrity

Constituídas por técnicas simples e baratas, medições de mudanças no desenvolvimento ontogenético mostram-se boas ferramentas de biomonitoramento. Uma das técnicas usualmente utilizadas é a Assimetria Flutuante (AF). Neste estudo foram avaliados os efeitos da retirada de mata ciliar sobre os níveis de AF em caracteres das asas posteriores de Erythrodiplax basalis (Kirby). Os resultados demonstraram que os caracteres apresentam distribuição normal e média zero, permitindo assumir que os níveis de assimetria observados são AF. Também ficou evidenciado que índices de AF não estão correlacionados ao tamanho da asa, e apresentam baixo erro de mensuração. Não há evidência significativa de aumento nos índices de AF em áreas degradadas em detrimento de áreas preservadas para as variáveis (comprimento total da asa, largura da asa na altura no nó, distância do triângulo ao nodus e distância da alça anal ao nodus). A hipótese de que os indivíduos coletados em áreas com alteração ambiental apresentariam maiores níveis de AF em caracteres das asas não foi corroborada. Isto pode decorrer do fato de E. basalis ser uma espécie com boa capacidade de dispersão, e os espécimes amostrados em áreas alteradas podem ter se desenvolvido em outros locais e estavam utilizando as áreas apenas como ponto de forrageio e por isso não foi detectada AF. Outro fator que corrobora essa predição é o fato que outros estudos usando espécies de Zygoptera que possuem capacidade de dispersão menor, níveis significativos de AF tem sido detectados. Environmental Integrity Effect on Fluctuating Asymmetry in Erythrodiplax basalis (Libellulidae: Odonata) (Kirby) Abstract. Constituted by simple and cheaply techniques, measures of changes in ontogenetic development are good biomonitoring tools. One of these techniques commonly used is the Fluctuating Asymmetry (FA). In this study, we explore the effects of riparian vegetation removal on the levels of FA on hind wings traits of Erythrodiplax basalis (Kirby). The results showed that traits present normal distribution and zero mean, which allows us to assume that observe levels of asymmetry are FA. It was also evident that FA indexes are not correlated to the wing length, and present low levels of measurement error. There is no significantly evidence of increase in the FA levels in degraded areas in comparison with preserved areas for the measured variables (wing length, wing width on the nodus level, distance between triangle and nodus and distance between anal loop and nodus). The hypothesis that individuals collected in altered areas present higher levels of FA in wing traits was not corroborated. This may result from the fact that E. basalis is a species with good dispersal capability, and the specimens sampled in disturbed areas may have developed elsewhere and were only using the areas as a point of foraging and therefore was not detected AF. Another factor that corroborates this prediction is the fact that other studies using Zygoptera species that have lower dispersal ability, significant levels of physical activities has been detected.

Poultry Manure as a Fertilizer

EDIS ◽  
2013 ◽  
Vol 2013 (11) ◽  
Author(s):  
Michael A. Davis ◽  
Doug R. Sloan ◽  
Gerald Kidder ◽  
R. D. Jacobs
Keyword(s):  
Organic Matter ◽  
Environmental Factors ◽  
Nitrogen Content ◽  
Soil Amendment ◽  
Poultry Manure ◽  
Nutrient Retention ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
Animal Science ◽  
Fact Sheet

Animal manures have been used as natural crop fertilizers for centuries. Because of poultry manure’s high nitrogen content, it has long been recognized as one of the most desirable manures. Besides fertilizing crops, manures also supply other essential plant nutrients and serve as a soil amendment by adding organic matter, which helps improve the soil’s moisture and nutrient retention. Organic matter persistence will vary with temperature, drainage, rainfall, and other environmental factors. This 2-page fact sheet was written by Michael A. Davis, D.R. Sloan, Gerald Kidder, and R.D. Jacobs, and published by the UF Department of Animal Science, November 2013. http://edis.ifas.ufl.edu/aa205

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