The of Luxembourg

Abundance trends, species richness and distribution DATA PRODUCTION

RECORDER, J. Cungs, M. Hellers, R. Proess + T. De Sousa, N. Elvinger, M. Hellers, N. Mayon, J.P. Rolin, G. SICONA, SIAS Schmidt 2 SPECIES RICHNESS

B. daphne

P. mannii C. argiades + 2 +1 100 85 82 -17 -4 A. niobe E. maturna H. lucina C. glycerion S. spini I. podalirius C. hero M. phoebe L. virgaurea E. aethiops M. didyma… B. euphrosyne

10000 8000 6000 4000 2000

0

1904 1999 1851 1854 1889 1893 1901 1913 1917 1923 1926 1930 1948 1951 1954 1957 1960 1963 1966 1969 1972 1975 1978 1981 1984 1987 1990 1993 1996 2002 2005 2008 2011 2014 2017 3 1800 SPECIES RICHNESS

10000 8000 6000 4000 2000

0

1904 1999 1851 1854 1889 1893 1901 1913 1917 1923 1926 1930 1948 1951 1954 1957 1960 1963 1966 1969 1972 1975 1978 1981 1984 1987 1990 1993 1996 2002 2005 2008 2011 2014 2017 4 1800 TRANSECT-BASED SURVEY

959 sections (50-200m): • Method = Pollard walk • 58 % randomly selected = Common Luxembourg landscape • 53% inside NATURA 2000 (mostly open habitats)

M. Molitor 6 M. Molitor TRANSECT-BASED SURVEY

mean

7 TRANSECT-BASED SURVEY

=common landscape

8 TRANSECT-BASED SURVEY

• Pollard walk in about 22 European countries/regions

EU trend LU trend LU distribution Lasiommata megera Widepsread Strong decline Strong increase Countryside Ochlodes sylvanus Widepsread Moderate decline Strong decline Countryside Coenonympha pamphilus Widepsread Stable Strong decline Countryside Maniola jurtina Widepsread Stable Strong decline Countryside phlaeas Widepsread Stable Uncertain Countryside Polyommatus icarus Widepsread Moderate increase Strong decline Countryside Anthocharis cardamines Widepsread Moderate increase Uncertain Countryside Phengaris arion N2000 Specialist Strong decline Natural areas Thymelicus acteon Specialist Moderate decline Natural areas Euphydryas aurinia N2000 Specialist Stable Natural areas Erynnis tages Specialist Stable Natural areas Polyommatus coridon Specialist Stable Natural areas Cupido minimus Specialist Stable Natural areas Spialia sertorius Specialist Moderate increase Natural areas Polyommatus bellargus Specialist Moderate increase Natural areas semiargus Specialist Stable Strong decline Countryside 9 Phengaris nausithous N2000 Specialist Moderate decline Absent from LU TRANSECT-BASED SURVEY

• European Monitoring Scheme (eBMS) database • Data sharing agreement between 14 country/regions • Facilitate large-scale studies • European online encoding form: www.butterfly-monitoring.net

10 BUTTERFLY ATLAS

Species distribution

• ≈ 102.000 unique records (including ≈1.500 non-detection records) • Distribution maps • Red-list

11 BUTTERFLY ATLAS

Distribution Violet Copper Marsh Fritillary (Lycaena helle) (Lycaena dispar) (Phengaris arion) (Euphydryas aurinia)

1990 - 2009 AND 2010 - 2016

H. Baltus

2010 – 2016 only

Before 1989 only

1990 – 2009 only

12 BUTTERFLY ATLAS

Distribution Violet Copper Large Copper Large Blue Marsh Fritillary (Lycaena helle) (Lycaena dispar) (Phengaris arion) (Euphydryas aurinia)

H. Baltus

13 BUTTERFLY ATLAS

Distribution Violet Copper Large Copper Large Blue Marsh Fritillary (Lycaena helle) (Lycaena dispar) (Phengaris arion) (Euphydryas aurinia)

N. Titeux

14 BUTTERFLY ATLAS

Distribution Violet Copper Large Copper Large Blue Marsh Fritillary (Lycaena helle) (Lycaena dispar) (Phengaris arion) (Euphydryas aurinia)

H. Baltus

15 BUTTERFLY ATLAS

Distribution trend

1990-2009 2010-2016 ≥2 surveys ≥2 surveys ? ?

17 BUTTERFLY ATLAS

Survey effort estimates • 1°Presence only data • 2°Distribution model 200m • 3°Binarization and up scaling =>1km • 4°Survey effort • 5°Species distribution

18 THANK YOU

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