Search results for "wetland"

The use of constructed wetlands for the treatment of agro-industrial wastewater – A case study in a dairy-cattle farm in Sicily (Italy)

2017

Wastewaters generated by agro-industrial operations often represent an unsustainable cost for farms due to high wastewater-treatment management costs. The wastewater produced by dairies, wineries or oil mills may vary in quantity and in quality depending on the time of the year, making the use of a conventional treatment system less efficient and more costly. Constructed wetland systems (CWs) provide low-cost technology and an efficient solution in the treatment of a number of wastewaters from agriculture. They are simple to build, have low maintenance costs and are sustainable compared to conventional treatment methods. This paper shows a case study that was carried out on a dairy-cattle f…

Growth of Arundo donax L. and Cyperus alternifolius L. in a horizontal subsurface flow constructed wetland using pre-treated urban wastewater - a cas…

2013

Constructed wetland systems for wastewater treatment represent an excellent opportunity for the recovery of water resources in those areas subject to prolonged periods of water shortage. This paper presents a study of the efficiency of a pilot horizontal subsurface flow system using pre-treated urban wastewater from a small town in the West of Sicily. The pilot system had a total surface area of 100 m2 with two units. Unit A was planted with Arundo donax L. and unit B with Cyperus alternifolius L. The HLR was 10 cm d-1. The main objectives of research were to evaluate the growth and biomass yield of two macrophytes and determine the removal efficiency of physical-chemical and microbiologica…

Environmental Variables and Planktonic Communities in Two Ponds of El Hondo Wetland (SE Spain)

2001

The annual cycle of physical and chemical variables and plankton dynamics was studied in two shallow ponds (East and West Ponds) of the El Hondo wetland, an ecosystem of international importance. Water conductivity increased up to 31-49 mS cm -1 as water level decreased due to high evaporation and minimal water inputs. Initially considered mesohaline, the waters were reclassified as polyhaline during the hot season. EP was subject to successive desiccation-flooding cycles, and flooding of the dried sediment caused the release of high concentrations of nitrogen and phosphorus compounds, which quickly depleted. The algal species composition was typical of eutrophic ecosystems, and the chlorop…

Pseudonapomyza mediterranean. sp. (Diptera: Agromyzidae) from Salt Marshes in Spain

2010

ABSTRACT: Description, ecological aspects of biology and systematic position of Pseudonapomyza mediterranea, a new species from Spain (“Lagunas de la Mata-Torrevieja” Natural Park) are given.

Heterogenic aquatic vegetation promotes abundance and species richness of Odonata (Insecta) in constructed agricultural wetlands

2019

Peat florulas in the Madonie Regional Park (Sicily)

2009

The floristic exploration of the eastern slopes of the Madonie Mountains in Sicily, carried out between 1975 and 1980, resulted in the discovery of several hydromorphic environments characterized by a thick peaty horizon. Locally named “margiu” or “triemula”, depending on the lower or higher depth, they host plant communities characterized by some species of Juncus and Carex together with acidophilous bryophytes including some species of Sphagnum. Their ecology as well as their flora and vegetation have been studied (Petronici et al. 1978). In some localities fossil pollens have also been examined (Bertolani Marchetti et al. 1984). Floristic analyses pointed out some phytogeographical patte…

Evaluación del riesgo en humedales costeros mediterráneos de la presencia de contaminantes químicos orgánicos = Evaluation of the risk in Mediterrane…

2008

El rápido incremento de la población urbana ha traído asociado una intensa presión en el medioambiente circundante. Actualmente, la franja costera en la mayoría de países europeos es el área que ha experimentado un mayor desarrollo socioeconómico. Algunas pinceladas obtenidas de distintas fuentes dan una idea global de la importancia del crecimiento demográfico de estas zonas. Hoy en día, 3 mil millones de personas –alrededor de la mitad de la población mundial- viven a menos de 200 kilómetros de la costa. Dos quintas partes de las ciudades con poblaciones de entre 1 y 10 millones están localizadas cerca de la costa. En Bélgica, Portugal y España, la densidad de población en los 10 kilómetr…

Biogeographic patterns of base-rich fen vegetation across Europe

2014

International audience; Questions: What is the distribution of base-rich fen vegetation and the specia- list species along European biogeographic regions? How do the gradients in spe- cies composition correlate to geography and climate at continental scale? What are the implications of such patterns for the classification of these habitats?Location: Fifteen countries of Central, Western and Northern Europe.Methods: We compiled a vegetation plot database of base-rich fens and related communities including vascular plants and bryophytes. The initial data set with 6943 plots was filtered according to the presence of specialists using discriminant analysis. We used DCA to analyse the correlatio…

Zbiorowiska roślinne z klasy Utricularietea intermedio-minoris w stawach hodowlanych południowo-zachodniej Polski

2017

Zbiorowiska z klasy Utricularietea intermedio-minoris Den Hartog et Segal 1964 em. Pietsch 1965 należą do wyspecjalizowanych pod względem ekologicznym fitocenoz, występujących w wodach oligotroficznych, mezotroficznych oraz dystroficznych na podłożu torfowym. W Polsce należą do grupy zbiorowisk bardzo słabo zbadanych. Celem pracy było przedstawienie aktualnego rozmieszczenia i charakterystyki fitosocjologicznej zespołów z klasy Utricularietea intermedio-minoris, których fitocenozy stwierdzono w latach 2000–2015 w południowo-zachodniej Polsce na terenie stawów hodowlanych województw: dolnośląskiego i opolskiego. W trakcie przeprowadzonych badań zostały wykazane dwa zespoły z tej klasy: zespó…

Wetland Restoration with Hydrophytes: A Review

2021

Restoration cases with hydrophytes (those which develop all their vital functions inside the water or very close to the water surface, e.g., flowering) are less abundant compared to those using emergent plants. Here, I synthesize the latest knowledge in wetland restoration based on revegetation with hydrophytes and stress common challenges and potential solutions. The review mainly focusses on natural wetlands but also includes information about naturalized constructed wetlands, which nowadays are being used not only to improve water quality but also to increase biodiversity. Available publications, peer-reviewed and any public domain, from the last 20 years, were reviewed. Several countrie…