Jenica Hanganu

Jenica Hanganu
Danube Delta National Institute for Research and Development (DDNIRD) · ECOLOGICAL RESTORATION AND SPECIES RECOVERY

PhD

About

60
Publications
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Introduction
Present activities are focused on ecological reconstruction of degraded wetlands, Copernicus Land Cover monitoring, aquatic vegetation survey and mapping, management of natural resources of wetlands areas, wetland soils.

Publications

Publications (60)
Article
Full-text available
How can the governance of nature areas foster the sustainability of ecosystems? This is discussed with regard to larger threats on ecosystems despite larger global nature areas that reach 19 million km2 of land along with larger costs per area unit. Moreover, monetization of nature with payments for ecosystem services is sometimes demanded for just...
Article
Full-text available
In wetland environments, vegetation has an important role in ecological functioning. The main goal of this work is to identify an optimal combination of Sentinel-1 (S1), Sentinel-2 (S2), and Pleiades data using ground-reference data to accurately map wetland macrophytes in the Danube Delta. We tested several combinations of optical and Synthetic Ap...
Conference Paper
Full-text available
Transformation of organic matter components as a result of decomposition processes during peat formation can be investigated using Fourier transform infrared (FTIR) spectra analysis. This method enables calculation of so-called 'Humification Index' (HI), i.e. the ratio of spectral peak intensity of lignin and phenolic compounds (wavenumbers 1600-16...
Article
Full-text available
Wetlands are important and valuable ecosystems, yet, since 1900, more than 50% of wetlands have been lost worldwide. An example of altered and partially restored coastal wetlands is the Danube Delta in Romania. Over time, human intervention has manifested itself in more than a quarter of the entire Danube surface. This intervention was brutal and h...
Article
Full-text available
Wetlands are important and valuable ecosystems, yet, since 1900, more than 50 % of wetlands have been lost worldwide. An example of altered and partially restored coastal wetlands is the Danube Delta in Romania. Over time, human intervention has manifested itself in more than a quarter of the entire Danube surface. This intervention was brutal and...
Article
Full-text available
Land cover is a fundamental variable for regional planning, as well as for the study and understanding of the environment. This work propose a multi-temporal approach relying on a fusion of radar multi-sensor data and information collected by the latest sensor (Sentinel-1) with a view to obtaining better results than traditional image processing te...
Technical Report
Full-text available
Water resources globally are affected by a complex mixture of stressors resulting from a range of drivers, including urban and agricultural land use, hydropower generation and climate change. Understanding how stressors interfere and impact upon ecological status and ecosystem services is essential for developing effective River Basin Management Pl...
Article
The main scope of the paper is the implementation of future scenarios in the Lower Danube basin, supporting the development of River Basin Management Plans and future environmental policies. The 800 000 km² Danube River Basin extends across 19 countries, of which 14 are contracting parties of the ICPDR. The Lower Danube is occupied mostly by Romani...
Article
Full-text available
Based on the ‘European Mires Book’ of the International Mire Conservation Group (IMCG), this article provides a composite map of national datasets as the first comprehensive peatland map for the whole of Europe. We also present estimates of the extent of peatlands and mires in each European country individually and for the entire continent. A minim...
Chapter
Full-text available
Wetlands are important and valuable ecosystems; yet, since 1900, more than 50% of wetlands have been lost worldwide. An example of altered and partially restored coastal wetlands is the Danube Delta in Romania. Over time, human intervention has manifested itself in more than one-quarter of the entire Danube surface. This intervention was brutal and...
Conference Paper
Full-text available
Wetlands are important and valuable ecosystems, yet, since 1900, more than 50% of wetlands have been lost worldwide. An example of altered and partially restored coastal wetlands is the Danube Delta in Romania. Over time, human intervention has manifested itself in more than a quarter of the entire Danube surface. This intervention was brutal and h...
Technical Report
Full-text available
D6.1-1 Summary: Currently, practical management of water bodies focuses on the control of single stressors which are assumed to be dominant. Work by the MARS project and others using ecosystem scale and experimental observations has demonstrated that the relationships between primary stressors and ecological response indicators can be confounded th...
Technical Report
Full-text available
Summary D6.1-1: Currently, practical management of water bodies focuses on the control of single stressors which are assumed to be dominant. Work by the MARS project and others using ecosystem scale and experimental observations has demonstrated that the relationships between primary stressors and ecological response indicators can be confounded th...
Article
Full-text available
The land monitoring data derived from satellite images for the 2006–2012 period provide information on land-cover changes in Romania. Availability and the quality of these data can contribute to new approaches of landscape assessment, for instance, in the context of environmental policies, the diversity of land use (patchiness) and surface as well,...
Technical Report
Full-text available
Deliverable D4.1 is a synthesis report of the 16 regional case studies being undertaken in WP4 (Multi-stressors at the river basin scale. The report is composed of 3 parts. Part 1: Task 4.2 - Southern Basins region Part 1 reports the background to, and results and conclusions from Task 4.2 on four case studies from the Southern Basins region. The...
Article
Full-text available
Wetlands are among the most productive natural environments on Earth, as they harbor exceptional biological diversity. For this paper, our study site was the Danube Delta. The biodiversity of the Danube Delta is extraordinary and it possesses one of the largest reed beds in the world. The main goal of our paper was to recognize, characterize, and m...
Article
Full-text available
At present, the characterization and monitoring of water bodies' ecological state is achieved with important financial resources supported by the EU member countries. Since human and financial resources are limited, the development of new mapping tools such as remote sensing ones may be a practical alternative for water bodies' assessment and monit...
Article
Full-text available
A description of biological and ecological data of the Danube delta lakes and channels is presented. The biological indicators refer to aquatic macrophytes, fish, zoo-plankton, and macro-invertebrates. Environmental data include physio-chemical data as well as hydrological parameters.
Technical Report
Full-text available
This deliverable is composed of four chapters describing products of the MARS project, which will contribute to harmonize the outcome of the experiments (WP3), of the catchment modelling (WP4) and of the large-scale data analysis (WP5). All these work areas address the effects of multiple stressors on water resources and aquatic ecosystems, but are...
Article
Full-text available
Water resources globally are affected by a complexmixture of stressors resulting from a range of drivers, including urban and agricultural land use, hydropower generation and climate change. Understanding how stressors interfere and impact upon ecological status and ecosystem services is essential for developing effective River Basin Management Pla...
Book
Full-text available
This monograph summarizes the results of field studies and the retrospective analysis of publications and archival materials on the ecology of Chany Lake, the largest area of water surface in Western Siberia. The monograph provides the information on climate in the area under study, features of geological structure, geomorphology, and the landscape...
Article
Full-text available
A description of biological and ecological data of the Danube delta lakes and channels is presented. The biological indicators refer to aquatic macrophytes, fish, zoo-plankton, and macro-invertebrates. Environmental data include physio-chemical data as well as hydrological parameters.
Article
Full-text available
Due to its high biodiversity the Danube Delta, in Romania, is recognized as a UNESCO World Heritage Natural Site and it is listed as a RAMSAR wetland. The Danube River variable discharges have a great impact on the habitats and the overall ecological status of the delta. One of its most vulnerable parts, from both hydrodynamic and morphological poi...
Article
Water resources globally are affected by a complex mixture of stressors resulting from a range of drivers, including urban and agricultural land use, hydropower generation and climate change. Understanding how stressors interfere and impact upon ecological status and ecosystem services is essential for developing effective River Basin Management Pl...
Book
Full-text available
Despite the fact that various types of perspective strategies have been approached at national level, the management of climate change effects has proved inefficient. The direction and proportions of climate changes at regional level as well as the effects on management measures are still unclear. There will be created new conditions which will tri...
Article
The objective of our researches, within the specified program, consists in the inventory from all the viewpoints of the meadows on a surface of 58 492 ha. The sorting methodology of the meadows in field and the registering methodology of the field data has been made in electronic format, being elaborated by the coordonator of the project.
Article
Full-text available
Implementation of European Water Framework Directive (WFD) legislation requires valuation of chemical and ecological status of surface water bodies. One of the biological indicators prescribes for such assessment is aquatic macrophytes taxonomic composition and abundance. In many member states the trophic status of the lakes is asses by calculating...
Data
Full-text available
The enviroGRIDS scenarios comprise a number of plausible alternatives (storylines) based on a coherent set of assumptions, key relationships and driving forces, to create a set of quantitative, internally consistent and spatially explicit scenarios of future demography, climate and land use covering the entire Black Sea Catchment (BSC). This report...
Article
Full-text available
The reed beds are widely considered in Europe as ecologically and economically beneficialareas. In The Danube Delta Biosphere Reserve (D.D.B.R.), reed is by far the dominant species and reedmarshes cover more than 220,000 ha (Hanganu et al 2002). Presently, certain areas of reed beds areselected for burning or harvesting during the winter by privat...
Article
Full-text available
The reed beds are widely considered in Europe as ecologically and economically beneficial areas. In The Danube Delta Biosphere Reserve (D.D.B.R.), reed is by far the dominant species and reed marshes cover more than 220,000 ha (Hanganu et al 2002). Presently, certain areas of reed beds are selected for burning or harvesting during the winter by pri...
Article
Full-text available
Presented as biological indicators, the aquatic macrophytes, according to their community and distribution are important elements for water quality determination. In lakes there are many hydro-morphological pressures that play an important role in the distribution of aquatic macrophytes. The paper presents an overview of recent literature on specie...
Article
Aquatic macrophytes are one of the biological quality elements in the Water Framework Directive (WFD) for which status assessments must be defined. We tested two methods to classify macrophyte species and their response to eutrophication pressure: one based on percentiles of occurrence along a phosphorous gradient and another based on trophic ranki...
Article
Defining the overall ecological status of lakes according to the Water Framework Directive (WFD) is to be partially based on the species composition of the aquatic macrophyte community. We tested three assessment methods to define the ecological status of the macrophyte community in response to a eutrophication pressure as reflected by total phosph...
Article
Full-text available
The Water Framework Directive (WFD 2000) defines macrophytes as one of the biological groups required for the ecological assessment of European surface waters. Several indices for macrophyte assessment have been proposed or are currently in use by different European states. As a first step towards performing an intercalibration of these indices a c...
Article
Full-text available
There are over 300 lakes interconnected by riverbranches and man-made canals in the Danube Delta (Romania). A multidisciplinary survey of these riverine lakes situated in large wetland complexes was made comprising hydrological modelling, remote sensing and monitoring of water quality, plankton, aquatic vegetation and fish communities. Between-lake...
Article
Full-text available
Lakes in the Danube Delta (Romania) are influenced by the degree of connectivity with the main river branches. Lakes close to the inflow of river water show high concentrations of suspended sediments, whereas lakes isolated within the reedbed complexes have clear 'brown' water (high concentrations of humic substances). We describe the changes of ph...
Book
Full-text available
This report is the result of a scientific co-operation between the DDNI Danube Delta National Institute (Tulcea, Romania) and the RIZA Institute for Inland Water Management and Waste Water Treatment (Lelystad, the Netherlands). The Dutch and Romanian ecologists in these institutes share a common concern with the ecology of temperate wetlands. The c...
Article
Full-text available
This paper presents data showing phenotypic differences of Phragmites australis (Cav.) Trin. ex Steud. (Common reed) growing in Comana lake and in the Danube Delta (Romania). In Comana lake, tetra- and octoploids were found, whereas in the Danube Delta also hexaploids occurred. In freshwater habitats, shoots of octoploids were longer and thicker wi...
Article
The effects of locally increased salinity in a complex of Fine and Giant reed (Phragmites australis) clones were investigated in the Tataru channel (Danube Delta, Romania). Following digging of the Tataru channel, the area closest to the sea became isolated from freshwater input, causing saline conditions to develop due to its proximity to the sea....
Article
Full-text available
The aquatic vegetation present in lakes in the delta of the River Danube was studied using field survey data and satellite image. Based on the spectral information from satellite images, three categories of lakes were distinguished: clear / macrophyte-dominated, intermediate and turbid / poorly vegetated. The satellite-based classification was cons...
Article
Full-text available
The work presents two major applications of CLC 1990 in Romania. The first application, requested by Romanian Waters National Administration, analyse the Romanian land cover of the Danube River catchments area upstream the hydrological monitoring stations accord- ing with the monitoring and information network EUROWATERNET designed by the Euro- pea...

Projects

Projects (10)
Project
The project's main objective: ecological restoration and recovery of wild flora and fauna species, especially sturgeons, within the Danube Delta Biosphere Reserve ecosystems. Project duration: Mar 2019 – Dec 2022 Expected results to achieve the project's main objective: - Georeferenced database and maps on the location of areas identified as anthropogenically degraded. - Georeferenced database on biotic and abiotic parameters in ecologically restored areas. - Georeferenced database on biotic and abiotic parameters in anthropogenically degraded areas. - Database on the status of potential sturgeon habitats. - Database on the genetic diversity of sturgeon chicks captured in the Danube River. - Database on the location of potential sturgeon habitats on the two Danube’s main arms, Chilia and Sf. Gheorghe. - Data on the success of the natural reproduction of sturgeons in the Danube River. - Solutions to improve the state of ecosystems in ecologically restored areas. - Environmental restoration solutions for anthropogenically degraded areas. - Proposals for measures to protect and conserve the sturgeon habitats and populations.
Project
The project focuses on river deltas in Europe and their potential to develop innovative activities aiming at utilization of local natural and cultural heritage. The aim is to improve the regional policy instruments that foster the capabilities of using ecosystem services in river deltas to strengthen regional economy. The delta regions are rich in biodiversity but poor financially. The challenge is how to foster the natural and cultural capabilities available from the past and to develop new experiences based on ecoservices in river deltas to boost regional economy. 6 delta regions participate: Rijn delta (NL), Danube delta (RO), Camargue delta (FR), Albufera delta (ES), Po delta (IT) and River Blackwater delta (IE). 9 partners from 6 countries represent a mix of regional and local public authorities as well as education and research institutes.