Implementation and Adaptation of Macrophyte Indication System: Assessment of Ecological Status of Rivers in Bulgaria According to the Water Framework Directive

Gecheva, Gana; Cheshmedjiev, Svetoslav; Dimitrova-Dyulgerova, Ivanka; Belkinova, Detelina; Mladenov, Rumen

doi:10.1080/13102818.2010.10817834

Cited by 6 publications

(11 citation statements)

References 6 publications

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“…Additionally, in this method the quantity (Q) of taxa from a group is determined: This value equals the cubic power of macrophyte volume (Q = MA 3 ). The method also accounts for the structural characteristic of the watercourse channel, flow velocity, bed, shading, as well as the information on the colour and smell of water, if they diverge from standard [10,33,34]. Table 2.…”

Section: The Ri-bg Methods (Bulgaria)mentioning

confidence: 99%

“…The initial reference index (RI) accounts for the ratio of the number of taxa from groups identified in the assessment and calculates it as follows [10,33]:…”

Section: Class No Description Of Ma Class Conversion To Percentagesmentioning

confidence: 99%

“…When performing calculations using this formula the result ranges from −100 to +100-if only the taxa from group C occur, one obtains the lowest score and if only the taxa from group A occur-the highest. In order to adjust the RI to values from 0 to 1, the Module Macrophyte Assessment (MMP) is calculated, i.e., [10,33]:…”

Section: Class No Description Of Ma Class Conversion To Percentagesmentioning

confidence: 99%

“…The assessment is performed in five ES classes (ecological quality ratio-EQR), i.e., on a scale from very good (class I) to bad (class V). TheŚlęza belongs to river group R-G3, i.e., lowland rivers, to type R13, i.e., small and medium lowland rivers with sandy and clay bed, with organic sediments, occasionally with gravel bed [10,33]. Classification of ES using the RI-BG method for rivers of type R13 is given in Table 4.…”

Section: Class No Description Of Ma Class Conversion To Percentagesmentioning

confidence: 99%

“…The method complies with the provisions of the Water Framework Directive. It should be noted that this group of methods is also used in other EU countries, e.g., Ireland (Mean Trophic Rank = MTR), Germany (Macrophyte Trophic Index = TIM), Great Britain (River LEAFPACS2) or France (Macrophytes Index for Rivers = IBMR) [7][8][9][10][11][12][13]. These methods are constantly updated and the current trend is to unify the classification procedures for water bodies.…”

Section: Introductionmentioning

confidence: 99%

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Application of Macrophytes to the Assessment and Classification of Ecological Status above and below the Barrage with Hydroelectric Buildings

Tomczyk

Wiatkowski

Gruss

2019

Water

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The key goal of the Water Framework Directive is to achieve a good ecological status in water bodies. The ecological status is mainly determined by the biological elements, which are a very good indicator of the changes taking place in water environments. Thus, this article focuses on the analysis of different methods of assessment of the ecological status of water bodies based on macrophytes used in selected countries in the European Union (the Macrophyte Index for Rivers (MMOR)—Poland; the Mean Trophic Rank (MTR)—Ireland; the Trophic Index of Macrophytes (TIM)—Bavaria, Germany; the Bulgarian Reference Index of Macrophytes (RI-BG)—Bulgaria). Three research sections have been selected for research on the river Ślęza: The reference section, the section above the barrage and the section below the barrage. The analysis carried out revealed considerable similarity between the results obtained by all these methods—the differences were at most by one class of ecological status (and the analysis of sums of Wilcoxon’s ranks revealed that there were no differences between the results obtained using different methods, i.e., p = 0.860). With respect to surface waters, investigation of biological elements is important because it allows one to retrace the past and foresee the future based on the past and present trends in the changes occurring in the species diversity and structure of not only macrophytes, but also other groups of organisms. Further action is required that would determine the scope of influence of barrages with hydroelectric buildings on the environment (in the case of the investigated barrage this influence is negative).

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Section: The Ri-bg Methods (Bulgaria)mentioning

confidence: 99%

“…The initial reference index (RI) accounts for the ratio of the number of taxa from groups identified in the assessment and calculates it as follows [10,33]:…”

Section: Class No Description Of Ma Class Conversion To Percentagesmentioning

confidence: 99%

Section: Class No Description Of Ma Class Conversion To Percentagesmentioning

confidence: 99%

Section: Class No Description Of Ma Class Conversion To Percentagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Macrophytes to the Assessment and Classification of Ecological Status above and below the Barrage with Hydroelectric Buildings

Tomczyk

Wiatkowski

Gruss

2019

Water

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Estimating nutrient thresholds for eutrophication management: Novel insights from understudied lake types

Poikāne

Kelly

Várbíró

et al. 2022

Science of The Total Environment

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Bryophytes and macro-algal growths as a part of macrophyte monitoring in rivers used for ecological assessment

Baláži

Hrivnák

2015

Knowl. Manag. Aquat. Ecosyst.

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Key-words:aquatic macrophyte, IBMR, river, Slovakia, Water Framework Directive Altogether, 62 taxa of macrophytes including 18 bryophytes and 16 macro-algal growths were determined at 87 survey sites (73 rivers) representing the both ecoregions in Slovakia (Pannonian and Carpathian) during the years 2010-2013. Bryophytes represented the dominant community in the Carpathians, while the occurrence of macro-algal growths was relatively balanced in both ecoregions. Ordination analyses (DCA) showed an obvious shift within studied survey sites from vascular plants to bryophytes, while macro-algal growths were more or less uniform distributed in the whole ordination space. Based on stepwise (forward) selection in CCA, altitude and water surfaces as a land use type were the main environmental factors responsible for this pattern and explained 13.7% of the variability. Variation partitioning showed that the shares of environmental variables on the total variation decreased in the following order: both groups together 8.3% (landscape and geographical variables, physicochemical variables), followed by landscape and geographical variables (5.8%) and purely physicochemical variables which had an insignificant effect on macrophyte composition. The importance of both groups (bryophytes and macro-algal growths) in ecological assessment was also confirmed by their contribution to the mean IBMR value determined for each water body type. Anyway, our study showed that their contribution to ecological assessment is not focused only on small mountain streams where they are dominant. They may obviously affect ecological assessment also in many water body types in lowland rivers and large upland rivers as well. Directive Cadre sur l'Eau montré un changement évident dans les sites de l'étude des plantes vasculaires vers les bryophytes, tandis que le développement des macro-algues était plus ou moins uniformément distribué. Basé sur une sélection progressive pas à pas en CCA, altitude et surfaces en eau comme le mode d'utilisation des terres ont été les principaux facteurs environnementaux responsables de cette tendance, expliquant 13,7 % de la variabilité. Le partitionnement de la variabilité a montré que la part des variables environnementales sur la variation totale a diminué dans l'ordre suivant : les deux groupes ensemble (8,3 %) (variables du paysage et géo-graphiques, variables physico-chimiques), suivis par le paysage et les variables géographiques (5,8 %) et les variables purement physico-chimiques qui avaient un effet négligeable sur la composition des macrophytes. L'importance de ces deux groupes (bryophytes et macro-algues) dans l'évaluation écologique a éga-lement été confirmée par leur contribution à la valeur IBMR moyenne déterminée pour chaque type de masse d'eau. Quoi qu'il en soit, notre étude a montré que leur contribution à l'évaluation écologique ne se concentre pas uniquement sur les petits ruisseaux de montagne où ils sont dominants. Ils peuvent évidemment avoir aussi une incidence sur l'évaluation...

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Implementation and Adaptation of Macrophyte Indication System: Assessment of Ecological Status of Rivers in Bulgaria According to the Water Framework Directive

Cited by 6 publications

References 6 publications

Application of Macrophytes to the Assessment and Classification of Ecological Status above and below the Barrage with Hydroelectric Buildings

Application of Macrophytes to the Assessment and Classification of Ecological Status above and below the Barrage with Hydroelectric Buildings

Estimating nutrient thresholds for eutrophication management: Novel insights from understudied lake types

Bryophytes and macro-algal growths as a part of macrophyte monitoring in rivers used for ecological assessment

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