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Open Access item Strength and uncertainty of phytoplankton metrics for assessing eutrophication impacts in lakes
Lyche Solheim, A.
De Hoyos, C.
Dudley, B. J.
Thackeray, S. J.
|Keywords:||Ecological indicator, Eutrophication, Water Framework Directive (WFD), Chlorophyll, Cyanobacteria, Trophic index|
|Citation:||Hydrobiologia : DOI 10.1007/s10750-012-1344-1 (2012)|
|Abstract:||Phytoplankton constitutes a diverse array
of short-lived organisms which derive their nutrients
from the water column of lakes. These features make
this community the most direct and earliest indicator
of the impacts of changing nutrient conditions on lake
ecosystems. It also makes them particularly suitable
for measuring the success of restoration measures
following reductions in nutrient loads. This paper
integrates a large volume of work on a number of
measures, or metrics, developed for using phytoplankton
to assess the ecological status of European lakes,
as required for the Water Framework Directive.
It assesses the indicator strength of these metrics,
specifically in relation to representing the impacts of
eutrophication. It also examines how these measures
vary naturally at different locations within a lake, as
well as between lakes, and how much variability is
associated with different replicate samples, different
months within a year and between years. On the
basis of this analysis, three of the strongest metrics (chlorophyll-a, phytoplankton trophic index (PTI),
and cyanobacterial biovolume) are recommended for
use as robust measures for assessing the ecological
quality of lakes in relation to nutrient-enrichment
pressures and a minimum recommended sampling
frequency is provided for these three metrics.|
|Description:||14 páginas, 1 figura, 4 tablas.|
|Publisher version (URL):||http://dx.doi.org/10.1007/s10750-012-1344-1|
|Appears in Collections:||(CEAB) Artículos|
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