A multivariate index based on the seagrass Posidonia oceanica (POMI) to assess ecological status of coastal waters under the water framework directive (WFD)

2007 ◽  
Vol 55 (1-6) ◽  
pp. 196-204 ◽  
Author(s):  
Javier Romero ◽  
Begoña Martínez-Crego ◽  
Teresa Alcoverro ◽  
Marta Pérez
Keyword(s):  
Water Framework Directive ◽  
Coastal Waters ◽  
Ecological Status ◽  
Posidonia Oceanica

scholarly journals Descriptors from Posidonia oceanica (L.) Delile meadows in coastal waters of Valencia, Spain, in the context of the EU Water Framework Directive

2008 ◽  
Vol 65 (8) ◽  
pp. 1492-1497 ◽  
Author(s):  
Yolanda Fernández-Torquemada ◽  
Marta Díaz-Valdés ◽  
Francisco Colilla ◽  
Beatriz Luna ◽  
José Luis Sánchez-Lizaso ◽  
...  
Keyword(s):  
Water Framework Directive ◽  
Coastal Waters ◽  
Ecological Status ◽  
Independent Set ◽  
Posidonia Oceanica ◽  
Shoot Density ◽  
Eu Water Framework Directive ◽  
Anthropogenic Pressures ◽  
Consistent Information ◽  
The Eu

Abstract Fernández-Torquemada, Y., Díaz-Valdés, M., Colilla, F., Luna, B., Sánchez-Lizaso, J. L., and Ramos-Esplá, A. A. 2008. Descriptors from Posidonia oceanica (L.) Delile meadows in coastal waters of Valencia, Spain, in the context of the EU Water Framework Directive. – ICES Journal of Marine Science, 65: 1492–1497. Evaluations are provided of 21 descriptors of Posidonia oceanica meadows along the coast of Valencia, Spain, with a view to using these in implementing the European Water Framework Directive (WFD). The descriptors selected are known to respond to a variety of anthropogenic disturbances. Data were collected at 17 locations during three consecutive years. A principal components analysis was used to classify the ecological status of each locality according to five classes as prescribed by the WFD. To identify the descriptors that contributed most to similarity among localities within each class and to dissimilarity between adjacent classes, a similarity percentage analysis was performed. We also correlated the descriptors with an independent set of indicators for various types of anthropogenic pressures on the water bodies associated with the different localities. The descriptors providing the most consistent information on status as well as demonstrating a significant relationship with estimated pressures were: shoot density, shoot foliar surface, dead-matte cover, meadow cover, herbivore pressure, rhizome baring/burial, foliar necrosis, percentage of plagiotropic rhizomes, and leaf-epiphyte biomass.

scholarly journals Assessment of the ecological status of Mediterranean French coastal waters as required by the Water Framework Directive using the Posidonia oceanica Rapid Easy Index: PREI

2009 ◽  
Vol 58 (11) ◽  
pp. 1727-1733 ◽  
Author(s):  
Sylvie Gobert ◽  
Stéphane Sartoretto ◽  
Valérie Rico-Raimondino ◽  
Bruno Andral ◽  
Aurelia Chery ◽  
...  
Keyword(s):  
Water Framework Directive ◽  
Coastal Waters ◽  
Ecological Status ◽  
Posidonia Oceanica

scholarly journals Land-use and agriculture in Denmark around year 1900 and the quest for EU Water Framework Directive reference conditions in coastal waters

AMBIO ◽  
2021 ◽  
Author(s):  
Bent T. Christensen ◽  
Birger F. Pedersen ◽  
Jørgen E. Olesen ◽  
Jørgen Eriksen
Keyword(s):  
Land Use ◽  
Water Framework Directive ◽  
Coastal Waters ◽  
Root Zone ◽  
Reference Conditions ◽  
Ecological Status ◽  
Agricultural Activity ◽  
Eu Water Framework Directive ◽  
Alternative Approach ◽  
The Eu

AbstractThe EU Water Framework Directive (WFD) aims to protect the ecological status of coastal waters. To establish acceptable boundaries between good and moderate ecological status, the WFD calls for reference conditions practically undisturbed by human impact. For Denmark, the nitrogen (N) concentrations present around year 1900 have been suggested to represent reference conditions. As the N load of coastal waters relates closely to runoff from land, any reduction in load links to agricultural activity. We challenge the current use of historical N balances to establish WFD reference conditions and initiate an alternative approach based on parish-level land-use statistics collected 1896/1900 and N concentrations in root zone percolates from experiments with year 1900-relevant management. This approach may be more widely applicable for landscapes with detailed historic information on agricultural activity. Using this approach, we find an average N concentration in root zone percolates that is close to that of current agriculture. Thus, considering Danish coastal waters to be practically unaffected by human activity around year 1900 remains futile as 75% of the land area was subject to agricultural activity with a substantial potential for N loss to the environment. It appears unlikely that the ecological state of coastal waters around year 1900 may serve as WFD reference condition.

A biotic index using the seagrass Posidonia oceanica (BiPo), to evaluate ecological status of coastal waters

2010 ◽  
Vol 10 (2) ◽  
pp. 380-389 ◽  
Author(s):  
C. Lopez y Royo ◽  
G. Casazza ◽  
C. Pergent-Martini ◽  
G. Pergent
Keyword(s):  
Coastal Waters ◽  
Ecological Status ◽  
Posidonia Oceanica ◽  
Biotic Index

scholarly journals Monitoring of Posidonia oceanica meadows in the Sicilian coasts under the Water Framework Directive (WFD)

2020 ◽  
pp. 510-518
Author(s):  
Giancarlo Bellissimo ◽  
Benedetto Sirchia ◽  
Vincenzo Ruvolo
Keyword(s):  
Surface Area ◽  
Water Framework Directive ◽  
Lower Limit ◽  
Ecological Status ◽  
Posidonia Oceanica ◽  
Shoot Density ◽  
Water Bodies ◽  
Index Method ◽  
Leaf Surface Area ◽  
First Time

The present paper aims to assess for the first time the ecological status of the Sicilian water bodies using the PREI (Posidonia oceanica Rapid Easy Index) method according to the Water Framework Directive (WFD, 2000/60/EC) requirements. The PREI is based on five metrics: shoot density, shoot leaf surface area, E/L ratio, depth of lower limit, and type of this lower limit. Monitoring of the 29 P. oceanica meadows allowed to classify the 20 WBs of Sicilian coasts in the first two levels of status: 10 as “high” and 10 as “good” with the PREI values ranged between 0,551 and 1.

scholarly journals Effectiveness of Posidonia oceanica biotic indices for assessing the ecological status of coastal waters in Saronikos Gulf (Aegean Sea, Eastern Mediterranean)

2017 ◽  
Vol 18 (1) ◽  
pp. 161 ◽  
Author(s):  
V. GERAKARIS ◽  
P. PANAYOTIDIS ◽  
S. VIZZINI ◽  
A. NICOLAIDOU ◽  
A. ECONOMOU-AMILLI
Keyword(s):  
Coastal Waters ◽  
Eastern Mediterranean ◽  
Spatial Scales ◽  
Ecological Status ◽  
Aegean Sea ◽  
Posidonia Oceanica ◽  
Assessment Tools ◽  
Biotic Indices ◽  
Cumulative Impact ◽  
Nested Analysis

Biotic indices are considered key assessment tools in most national and European policies aimed at improving the quality of coastal waters. At present, several Water Framework Directive (WFD)-compliant biotic indices based on the marine angiosperm Posidonia oceanica have been developed and applied in the Mediterranean Sea. In this study, we investigated the effectiveness of four different P. oceanica indices (POMI, PREI, Valencian CS, and BiPo) in evaluating the ecological status of coastal waters in a case study area of Greece. The evaluation, comparison, and validation of the Ecological Status Class (ESC) assessments obtained by each index were based on a set of eight common sites that encompasses the maximum range of environmental quality in the study area. Four sampling sites separated by tens of km were chosen in each of the two water bodies (WBs) studied. The spatial variations of the features of P. oceanica meadows were examined according to a hierarchical sampling design across four spatial scales, ranging from metres to tens of km, using independent nested analysis of variance. Except for the BiPo index, the reference values for each metric/index were defined by the dataset available for the study area. All biotic indices classified the WBs of the study area in Good ESC category. Only three of the four indices (PREI, Valencian CS, and BiPo) showed high comparability in the assessment of ESC at study site level. It is assumed that the differences found in the remaining index (POMI) are due to the different type of metrics taken into consideration and the different weighting given to them. Our findings suggest that all indices can provide an overall view of the cumulative impact of multiple environmental stressors existing in the study area, and can thus help raise awareness of ecosystem degradation.

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