Dormice National 1995-2011. As BBS time series. Time series are estimated monthly. dormouse Unsmoothed The data for June are used following advice from PTES. monitoring index. scheme (PTES) Butterflies UK Butterfly 1976-2011. Indices are calculated for butterfly species that have Site x year Log-linear Poisson regression models in TRIM Monitoring TRIM annual been recorded from five or more sites per year. The (Pannekoek and van Strien 1996) are used. For years Scheme index. wider countryside butterfly survey has only three where a transect site has not been recorded, the model (BRC) counts during summer and requires twice as many imputes an estimated site index that allows for the general monitored sites to achieve comparable precision to conditions of the year in question and how favourable the the 26-week butterfly monitoring scheme. 430 site is. monitoring sites on average are required to achieve 80% power (5% significance level) for detecting a 25% decline in abundance over 10 years. Table 5: Assessment of robustness of monitoring schemes Data quality = Red > Amber > Green – Dataset Effort Survey design Field method Moths Rothamsted moth survey (1968-) 80 Consistent, Non-random Light trap countryside butterfly survey (2007-) 750 Consistent, Random Transect Butterflies UK butterfly monitoring scheme (1976-) 1000 Consistent, Non- random Transect National Dormouse Survey (1993-) 300 Consistent, Known sites Nest box search Breeding bird survey (1995-) 2400 Consistent, Random Transect Mammals Various, field/ National Bat monitoring scheme (1997-) 1300 Consistent, Random roost counts Breeding bird survey (1995-) 3200 Consistent, Random Transect Territory Common bird census (1970-2000) 300 Consistent, Non-random mapping Birds Seabird monitoring programme, (1986 -) Species Consistent, Non-random or Colony counts seabird censuses (1969 ,85,00) specific Total Wetland bird survey (1970-) 3000 Consistent, Non-random Site counts
Dormice National dormouse monitoring scheme (PTES) 1995-2011. Unsmoothed index. As BBS time series. Time series are estimated monthly. The data for June are used following advice from PTES. Butterflies UK Butterfly Monitoring Scheme (BRC) 1976-2011. TRIM annual index. Indices are calculated for butterfly species that have been recorded from five or more sites per year. The wider countryside butterfly survey has only three counts during summer and requires twice as many monitored sites to achieve comparable precision to the 26-week butterfly monitoring scheme. 430 monitoring sites on average are required to achieve 80% power (5% significance level) for detecting a 25% decline in abundance over 10 years. Site x year Log-linear Poisson regression models in TRIM (Pannekoek and van Strien 1996) are used. For years where a transect site has not been recorded, the model imputes an estimated site index that allows for the general conditions of the year in question and how favourable the site is. Table 5: Assessment of robustness of monitoring schemes – Data quality = Red > Amber > Green Dataset Effort Survey design Field method Moths Rothamsted moth survey (1968-) 80 Consistent, Non-random Light trap Butterflies countryside butterfly survey (2007-) 750 Consistent, Random Transect UK butterfly monitoring scheme (1976-) 1000 Consistent, Non- random Transect Mammals National Dormouse Survey (1993-) 300 Consistent, Known sites Nest box search Breeding bird survey (1995-) 2400 Consistent, Random Transect National Bat monitoring scheme (1997-) 1300 Consistent, Random Various, field/ roost counts Birds Breeding bird survey (1995-) 3200 Consistent, Random Transect Common bird census (1970-2000) 300 Consistent, Non-random Territory mapping Seabird monitoring programme, (1986 -) seabird censuses (1969 ,85,00) Species specific Consistent, Non-random or Total Colony counts Wetland bird survey (1970-) 3000 Consistent, Non-random Site counts
biyp2013_C4a_%20TechBG_final.docx