scholarly journals Littoral invertebrates associated with aquatic plants and bioassessment of ecological status in Lake Bracciano (Central Italy)

2005 ◽  
Vol 64 (1) ◽  
pp. 43 ◽  
Author(s):  
Luciana MASTRANTUONO ◽  
Teresa MANCINELLI
Keyword(s):  
Aquatic Plants ◽  
Central Italy ◽  
Ecological Status ◽  
Littoral Invertebrates

Heavy metal accumulation of Danube river aquatic plants — indication of chemical contamination

2008 ◽  
Vol 3 (3) ◽  
pp. 285-294 ◽  
Author(s):  
Slobodanka Pajević ◽  
Milan Borišev ◽  
Srđan Rončević ◽  
Dragana Vukov ◽  
Ružica Igić
Keyword(s):  
Heavy Metal ◽  
Chemical Composition ◽  
Aquatic Plants ◽  
Ecological Status ◽  
Heavy Metal Accumulation ◽  
Danube River ◽  
Chemical Pollution ◽  
Chemical Contamination ◽  
Water And Sediment ◽  
Chemical Composition Of Water

AbstractIn this paper, the ecological status of a section of the Danube River flowing through Serbia from Bezdan to Djerdap was evalutated. Using the chemical composition of water, sediment samples from the littoral zone and dominant aquatic macrophytes, the level of chemical pollution was ascertained. Chemical analyses of the water and sediment indicated that the tributaries flowing into the Danube significantly influenced the chemical load of the water and as a direct consequence, the sediment. The concentration of heavy metals including Cu, Mn and Cd found in plants of the Potamogeton genus, further indicated significant chemical pollution, establishing a clear link between the chemical composition of plant tissues and the chemical composition of water and sediment. This paper therefore describes how the chemical composition of aquatic plants can be used as a reliable indicator for heavy metal pollution of aquatic ecosystems.

scholarly journals Management of aquatic plants and their contributions to fisheries production in Ikere-Gorge, Iseyin, Oyo State, Nigeria

Agro-Science ◽  
2020 ◽  
Vol 19 (4) ◽  
pp. 18-23
Author(s):  
S.O. Ajagbe
Keyword(s):  
Aquatic Plants ◽  
Aquatic Plant ◽  
Ecological Status ◽  
Freshwater Ecosystems ◽  
Individual Species ◽  
Salvinia Molesta ◽  
Aquatic Biodiversity ◽  
Fishing Villages ◽  
Α Diversity

Aquatic plants are important in freshwater ecosystems. They provide food, shelter, spawning and nursery grounds for fish. They are usually found  at the littoral parts of freshwater ecosystems. The abundance, distribution and diversity of aquatic plant of Ikere-gorge, Iseyin, Nigeria were  examined between January 2017 and December 2018. There are twelve fishing villages in Ikere-gorge and four villages were randomly selected. Aquatic plants were sampled and collected with the help of hired fishermen. The collected aquatic plant samples were identified at the Forest  Herbarium of the Forestry Research Institute of Nigeria with appropriate keys. This work identified 13 families and 23 species of aquatic plants.  Cyperaceae family recorded the highest (4) number of individual species while Salvinia molesta had the highest abundance in all the sampling sites. The ecological classification of the aquatic plants showed that 14 species are emergent; 7 species floating and 3 species submerged. Site C had the most abundance (9220) of aquatic plants, followed by site D (8490), site B (8130) and site A (7940). The gamma (γ) and beta (β) diversities were 23 and 0.01 respectively. The alpha (α) diversity included Dominance (0.08), Simpson (0.92) and Shannon-Wiener (2.72) respectively. These results show that Salvinia molesta and Najas guadalupensis are the most and least abundant aquatic plants in Ikere-gorge respectively; which may be due to  their ecological status. Moreover, management of aquatic plants is an integral part of fisheries management for sustainable fisheries. Therefore, their management is essential for the maintenance of aquatic biodiversity. Key words: aquatic plants, diversity, emergent, floating, submerged

scholarly journals Mediterranean river biomonitoring in Central Italy: Diatom biodiversity and characterization of communities

2016 ◽  
Vol 76 (s1) ◽  
Author(s):  
Valentina Della Bella ◽  
Rosalba Padula ◽  
Fedra Charavgis ◽  
Alessandra Cingolani ◽  
Paolo Colangelo
Keyword(s):  
Species Richness ◽  
Environmental Protection Agency ◽  
Central Italy ◽  
Ecological Status ◽  
Monitoring Network ◽  
Shannon Index ◽  
Sampling Station ◽  
River Monitoring ◽  
Type Definition ◽  
Umbria Region

In compliance with the European and Italian regulations, the Environmental Protection Agency of Umbria Region (ARPA Umbria) defined specific river monitoring programs and networks based on river type definition, human pressures and risk analysis. The Umbria Region lies in Central Italy and it can be split into three hydro-ecoregions belonging to the Mediterranean area. Data on diatom community composition were collected in five different Mediterranean macrotypes (M1-M5) throughout the diatom-based river monitoring network that is composed by 52 sampling stations in 36 watercourses. The main aim of this study was to characterise and to analyse diatom diversity across the different regional river macrotypes. Specifically, we investigated if: i) there were differences in species diversity (species richness and Shannon Index) among macrotypes; ii) there was difference in three water quality indexes (ICMi, IPS, and TI) among sites; and iii) there was a relationship between the observed ICMi, IPS and TI value and the diatom diversity. Two-hundred diatom species and varieties were identified, and the number of species per sampling station ranged from a minimum of 10 to a maximum of 38 species. The most frequent and abundant species were Amphora pediculus, Achnanthidium minutissimum, Navicula cryptotenella, Nitzschia dissipata, and each macrotype showed some peculiar species. The ecological status evaluation based on Intercalibration Common Metric Index (ICMi) classified 69% of the water bodies in high or good class. Significant differences in diversity and ICMi value among stream macrotypes were found, with M4 (small and medium mountain) and M5 (small, lowland, temporary) typologies showing the lowest species richness, and with M5 showing the lowest Shannon Index. Conversely, M2 (small and medium lowland) and M5 showed the highest ICMi value. Lastly, significant correlations between Shannon Index and the ICMi, IPS and TI indexes were found.

scholarly journals Classification of the ecological status of volcanic lakes in Central Italy

2003 ◽  
Vol 62 (1s) ◽  
pp. 49 ◽  
Author(s):  
Fiorenza G. MARGARITORA ◽  
Marcello BAZZANTI ◽  
Ornella FERRARA ◽  
Luciana MASTRANTUONO ◽  
Marco SEMINARA ◽  
...  
Keyword(s):  
Central Italy ◽  
Ecological Status ◽  
Volcanic Lakes

scholarly journals WFD Ecological Quality Indicators Are Poorly Correlated with Water Levels in River Catchments in Tuscany (Italy)

Hydrology ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 185
Author(s):  
Chiara Arrighi ◽  
Isabella Bonamini ◽  
Cristina Simoncini ◽  
Stefano Bartalesi ◽  
Fabio Castelli
Keyword(s):  
Central Italy ◽  
Ecological Status ◽  
Ecological Indicators ◽  
Water Levels ◽  
Poor Correlation ◽  
Anthropogenic Pressures ◽  
Ecological Sampling ◽  
Good Ecological Status ◽  
Environmental Agencies ◽  
Ecological Flows

The Water Framework Directive (WFD) requires European countries to achieve a good ecological status of surface water bodies and demands that River District Authorities define ecological flows consistently. Nevertheless, the relationship between ecological and hydrological indicators is not fully understood and not straightforward to apply because ecological and hydrological indicators are monitored by different institutions, with different timings and purposes. This work examines the correlation between a set of ecological indicators monitored by environmental agencies (STAR-ICMi, LIMeco, IBMR, and TDI) and water levels with assigned durations monitored by the hydrologic service in Tuscany (central Italy). Reference water levels are derived from stage-duration curves obtained by the statistical analysis of daily levels in the same year of ecological sampling. The two datasets are paired through a geospatial association for the same river reach and the correlation is measured through Pearson’s r. The results show poor correlation (r between −0.33 and −0.42) between ecological indicators and hydrologic variables, confirming the findings observed in other Italian catchments with different hydrologic regimes, climate, and anthropogenic pressures. Nevertheless, the negative correlations show a decreasing water quality with water depths, i.e., in the lower part of the catchments more affected by anthropogenic pressures. These findings suggests that the determination of ecological flows with a purely hydrological approach is not sufficient for achieving WFD objectives in the study area.

Sedimentary DNA analyses decipher past and present aquatic plant diversity in Siberian and Tibetan lakes

2020 ◽  
Author(s):  
Kathleen R. Stoof-Leichsenring ◽  
Sisi Liu ◽  
Weihan Jia ◽  
Laura S. Epp ◽  
Kai Li ◽  
...  
Keyword(s):  
Plant Diversity ◽  
Aquatic Plants ◽  
Aquatic Plant ◽  
Plant Biomass ◽  
Food Resource ◽  
Ecological Status ◽  
Genetic Data ◽  
The Tibetan Plateau ◽  
Data Set ◽  
Dna Analyses

<p><span>In recent decades Arctic and Alpine terrestrial ecosystems experienced an increase in aquatic plant biomass due to global warming, which motivates the investigation of aquatic plant diversity in High Arctic and Alpine regions, whereof so far only sparse data exist. Aquatic plants are important primary producers, food resource and supply habitat structure and thus have been widely used to infer the ecological status of modern lakes. Identification of past aquatic plants using macrofossil records only partly reflects the past community structure due to differences in spatial distribution, preservation and seed abundance of taxa. Thus, in our study we applied sedimentary DNA analyses to detect aquatic plant diversity in modern surface samples of over 200 lakes from various localities across Northern, Eastern and Central Siberia and the Tibetan plateau and selected lake core samples (covering Holocene timescales) from these regions. We applied metabarcoding of the trnL marker and used Illumina technology for NGS amplicon sequencing of PCR products and performed OBITools pipeline for bioinformatic analyses and taxonomic assignment. Firstly, our study aims to evaluate if the trnL marker typically used for detecting terrestrial plant diversity can deliver valuable information on the composition of aquatic plants. Secondly, we will use ordination analyses to test which environmental variables (e.g. lake water depth, pH and conductivity) shape the diversity of genetically detected aquatic plants. Thirdly, we will analyze past genetic aquatic plant diversity from Holocene lake cores and compare it with the modern genetic data set to reconstruct putative drivers of past diversity changes. So far, we identified free-floating (Nymphoides, <em>Ceratophyllum</em>), submerged (<em>Potamogeton </em>sp<em>.</em>), wetland taxa (<em>Caltha</em>, <em>Carex</em>, <em>Juncus</em>) and bryophytes <em>(Sphagnum)</em></span><span> in modern and past genetic data sets. Further statistical analyses are pending and will be finalized and presented at EGU.</span></p>

scholarly journals СИСТЕМАТИЧНА, ЕКОБІОМОРФОЛОГІЧНА СТРУКТУРА ТА СОЗОЛОГІЧНА ЦІННІСТЬ ФЛОРИ ВОДНИХ І ПРИБЕРЕЖНОВОДНИХ ЕКОСИСТЕМ РІЧКИ ЗОЛОТИНКА (ЧЕРНІГІВСЬКА ОБЛАСТЬ)

2020 ◽  
Vol 79 (1-2) ◽  
pp. 12-17
Author(s):  
Т. I. Ivus
Keyword(s):  
Species Composition ◽  
Coastal Water ◽  
Aquatic Plants ◽  
Ecological Status ◽  
Field Research ◽  
Life Forms ◽  
Small Rivers ◽  
Wide Range ◽  
Water Plants ◽  
The Village

The results of the study of the species composition of higher aquatic and coastal-aquatic plants of the Zolotynka River within the Chernihiv region are presented. The surveyed parts of the river revealed an increase in 42 species from 33 genus and 24 families. Small rivers serve as water storage for big rivers, they are of high ecological status which calls for improvement. One indicator of the status of small rivers is higher water and coastal-water plants, which react first to changes in the quality of the water body. By their species composition, projective cover, indicative properties and other characteristics it is possible to assess the ecological status of the river. The study was conducted in the course of 2017–2019. The material was collected during expeditionary studies of the valley of Zolotynka river (Chernihiv district, Chernihiv region). Zolotynka river belongs to Desna river basin and is its left tributary of the first order, its length is 13 km, the slope is 0.23 m/km, the area of the basin is 31.8 km². The river originates in the west of the village of Ivanivka, Chernihiv district of Chernihiv region. It flows southwest through the village of Zolotynka and joins Desna river. According to the results of expeditionary field research into the flora of Zolotynka river there are 42 species of higher water and coastal-water plants belonging to 33 genus, 24 families, 3 classes (Equisetopsida, Liliopsida and Magnoliopsida) and 2 divisions (Equisetophyta and Magnoliophyta). According to the classification of V.H. Papchenkova higher water and coastal- water flora of Zolotynka river belongs to 5 ecotypes, the largest of which is represented by a group of coastal- water plants – 27 species belonging to two ecotypes - gelophytes, or air-aquatic plants - 6 species and hygrogelophytes - 21 species. Analysis of the areological structure showed that species with a wide range of distribution make up almost 85%, according to the structure of life forms perennial herbaceous plants make up 90%, according to K. Raunkier’s classification hemicryptophytes predominate. According to the research findings there are 2 species that are subject to regional protection in Chernihiv region and a species recorded in the Red Data Book of Ukraine.

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