Adriaenssens et al. reviewed andass

Adriaenssens et al. reviewed and
assessed applications of fuzzy logic for decision
support in ecosystem management. They expressed
that the application of fuzzy logic seems to be very
promising in domains such as sustainability, environmental assessment and predictive models (Adriaenssens et al., 2004). Prato proposed a fuzzy logic
approach for evaluating ecosystem sustainability, and
stated that the fuzzy logic approach is more
appropriate than the conventional crisp sets approach
to evaluating the strong sustainability of an ecosystem
(Prato, 2005). Shen et al. investigated the status of
combined heavy metal and organo-chlorine pesticide
pollution and evaluated the soil environmental quality
of the Taihu Lake watershed using a fuzzy comprehensive assessment. The evaluation was carried out in
six steps such as (1) selecting of assessment
parameters, (2) establishing the membership functions, (3) calculating the membership function matrix,
(4) calculating the weights matrix, (5) determination
of the fuzzy algorithm and (6) statistical treatment of
data. They stated that the fuzzy comprehensive
assessment method provides a scientific basis for
analyzing and evaluating the environmental quality of
soil (Shen et al., 2005). Altunkaynak et al. detected
and removed the linear trend embedded in the
historical records of monthly dissolved oxygen
amount and then, they modeled dissolved oxygen
Y. Icaga / Ecological Indicators 7 (2007) 710–718 711