Long-term population trends reveal increasing importance of a Mediterranean wetland complex (Messolonghi lagoons, Greece) for wintering waterbirds

Zoological Studies

Table 3 Population alerts for declining waterbird species wintering at the Messolonghi lagoons during 1982 to 2012

Species name	1982	1993	2003
Black-necked grebe	Moderate alert	Strong alert	Strong alert
Northern pintail	No alert	Strong alert	Moderate alert
Common pochard	Strong alert	Strong alert	Moderate alert
Tufted duck	Strong alert	Strong alert	Strong alert

Alerts were generated over the whole time series and the last 20 and 10 years. Moderate alerts correspond to >25% decline; strong alerts correspond to >50% decline.