1_vodna-durektuva-es

Element

High status

Good status

Moderate status

General

There are no, or only very minor, anthropogenic alterations

The values of the biological quality elements for the sur-

The values of the biological quality elements for the sur-

to the values of the physico-chemical and hydromorpho-

face water body type show low levels of distortion resulting

face water body type deviate moderately from those nor-

logical quality elements for the surface water body type

from human activity, but deviate only slightly from those

mally associated with the surface water body type under

from those normally associated with that type under un-

normally associated with the surface water body type un-

undisturbed conditions. The values show moderate signs

disturbed conditions.

der undisturbed conditions.

of distortion resulting from human activity and are sig-

The values of the biological quality elements for the surface

nificantly more disturbed than under conditions of good

status.

water body reflect those normally associated with that type

under undisturbed conditions, and show no, or only very

minor, evidence of distortion.

These are the type-specific conditions and communities.

Element

High status

Good status

Moderate status

Phytoplankton

The taxonomic composition of phytoplankton corresponds

There are slight changes in the composition and abundance

The composition of planktonie taxa differs moderately from

totally or nearly totally to undisturbed conditions.

of planktonic taxa compared to the type-specific communi-

the type-specific communities.

The average phytoplankton abundance is wholly consistent

ties. Such changes do not indicate any accelerated growth of

Abundance is moderately disturbed and may be such as to

algae resulting in undesirable disturbances to the balance of

with the type-specific physico-chemical conditions and is not

produce a significant undesirable disturbance in the values of

organisms present in the water body or to the physico-chem-

such as to significantly alter the type-specific transparency

other biological and physico-chemical quality elements.

ical quality of the water or sediment.

conditions.

A moderate increase in the frequency and intensity of plank-

Planktonic blooms occur at a frequency and intensity

A slight increase in the frequency and intensity of the type-

tonie blooms may occur. Persistent blooms may occur during

specific planktonie blooms may occur.

which is consistent with the type-specific physico-chemi-

summer months.

cal conditions.

Macrophytes and

The taxonomic composition corresponds totally or nearly

There are slight changes in the composition and abundance

The composition of macrophytic and phytobenthic taxa dif-

phytobenthos

totally to undisturbed conditions.

of macrophytic and phytobenthic taxa compared to the type-

fers moderately from the type-specific community and is sig-

There are no detectable changes in the average macrophytic

specific communities. Such changes do not indicate any ac-

nificantly more distorted than at good status.

celerated growth of phytobenthos or higher forms of plant

and the average phytobenthic abundance.

Moderate changes in the average macrophytic and the aver-

life resulting in undesirable disturbances to the balance of or-

age phytobenthic abundance are evident.

ganisms present in the water body or to the physico-chemical

The phytobenthic community may be interfered with

quality of the water or sediment.

The phytobenthic community is not adversely affected by

and, in some areas, displaced by bacterial tufts and coats

present as a result of anthropogenic activities.

bacterial tufts and coats present due to anthropogenic activ-

ity.

Benthic inverte-

The taxonomic composition and abundance correspond

There are slight changes in the composition and abun-

The composition and abundance of invertebrate taxa dif-

brate fauna

totally or nearly totally to undisturbed conditions.

dance of invertebrate taxa from the type-specific com-

fer moderately from the type-specific communities.

The ratio of disturbance sensitive taxa to insensitive taxa

munities.

Major taxonomic groups of the type-specific community

shows no signs of alteration from undisturbed levels.

The ratio of disturbance-sensitive taxa to insensitive taxa

are absent.

The level of diversity of invertebrate taxa shows no sign of

shows slight alteration from type-specific levels.

The ratio of disturbance-sensitive taxa to insensitive taxa,

alteration from undisturbed levels.

The level of diversity of invertebrate taxa shows slight

and the level of diversity, are substantially lower than the

signs of alteration from type-specific levels.

type-specific level and significantly lower than for good

status.

Element

High status

Good status

Moderate status

General condi-

The values of the physico-chemical elements correspond

Temperature, oxygen balance, pH, acid neutralising ca-

Conditions consistent with the achievement of the values

tions

totally or nearly totally to undisturbed conditions.

pacity and salinity do not reach levels outside the range

specified above for the biological quality elements.

Nutrient concentrations remain within the range nor-

established so as to ensure the functioning of the type

specific ecosystem and the achievement of the values

mally associated with undisturbed conditions.

specified above for the biological quality elements.

Levels of salinity, pH, oxygen balance, acid neutralising

Nutrient concentrations do not exceed the levels estab-

capacity and temperature do not show signs of anthropo-

lished so as to ensure the functioning of the ecosystem

genic disturbance and remain within the range normally

and the achievement of the values specified above for the

associated with undisturbed conditions.

biological quality elements.

Specific synthetic

Concentrations close to zero and at least below the limits

Concentrations not in excess of the standards set in ac-

Conditions consistent with the achievement of the values

pollutants

of detection of the most advanced analytical techniques

cordance with the procedure detailed in section 1.2.6

specified above for the biological quality elements.

in general use.

without prejudice to Directive 91/414/EC and Directive

98/8/EC. (<EQS)

Specific non-syn-

Concentrations remain within the range normally as-

Concentrations not in excess of the standards set in ac-

Conditions consistent with the achievement of the values

thetic pollutants

sociated with undisturbed conditions (background

cordance with the procedure detailed in section 1.2.6 (2)

specified above for the biological quality elements.

levels = bgl).

without prejudice to Directive 91/414/EC and Directive

98/8/EC. (<EQS)