Distribution of the Little ringed plover & Common Sandpiper on Alpine rivers in Tyrol (Austria): Indicator for river dynamic?

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1 Distribution of the Little ringed plover & Common Sandpiper on Alpine rivers in Tyrol (Austria): Indicator for river dynamic? Lassacher Felix & Reinhard Lentner Innsbruck

2 content introduction project habitat (biotope) Little Ringed Plover (Charadrius dubius) Common Sandpiper (Actitis hypoleucos) population in Tyrol population 2012 trend over reference years habitat differences (between LRP & CS) summary Indicator?

3 introduction project over Tyrol 2012 (NT/ET) government of Tyrol (environmental protection office) Reinhard Lentner (project leader) monitoring little ringed plover (charadrius dubius) LRP common sandpiper (actitis hypoleucos) CS Revital (ecological office)

4 introduction

5 habitat natural habitat (primary habitat) open gravel areas on torrential streams bare or sparsely vegetated natural river dynamics secondary habitat (artificial) temporary artificial habitats such as gravel pits

6 species Little Ringed Plover (Charadrius dubius) Common Sandpiper (Actitis hypoleucos)

7 Little Ringed Plover (Charadrius dubius)

8 Little Ringed Plover (Charadrius dubius) Subspieces Charadrius dubius curonicus (GEMELIN 1789) Paläarktis Charadrius dubius jerdoni (LEGGE 1880) Indien, SO Asien Charadrius dubius dubius (SCOPOLI 1786) Philippinen, Neuguinea

9 Little Ringed Plover (Charadrius dubius) Central Europe: infrequently breeding bird bp (Bauer et al. 2012) RL Austria: VU vulnerable bp (Birdlife Austria 2012) RL Tyrol: CR critically endangered bp (Landmann & Lentner 2001) Fluctuating populations are characteristical

10 Little Ringed Plover (Charadrius dubius) Svensson et al. 2011

11

12 Common Sandpiper (Actitis hypoleucos) Actitis hypoleucos (Linnaeus 1758)

13 common sandpiper (actitis hypoleucos)

14 common sandpiper (actitis hypoleucos) Central Europe: slightly decreasing mio bp (Bauer et al. 2012) RL Austria: EN endangered bp (Frühauf & Dvorak 1996) RL Tyrol: VU vulnerable bp (Landmann & Lentner 2001)

15 Situation in Tyrol? investigation area Tyrol: 291 km (744 km) NT: 162 km (486 km) ET: 129 km (258 km)

16 Little Ringed plover Territories in Tyrol

17 1977 Little Ringed Plover 5 BP population trend on River Lech 1989/ BP BP

18 decreasing +increasing ~ fluctating +/ stable Weißenbach Pinswang Füssen Pflach Reutte Forchach Stanzach Häselgehr Elmen Elbigenalp Bach

19 a b c

20 a b c

21 Common Sandpiper Territories Tyrol

22 Lech bp 1977, 1989, 1994, 2012 Common sandpiper population trend on River Lech

23 habitat differences record point in % ,5 island peninsula bank 20 31,25 31,25 18,75 0 LRP 6,25 CS LRP territories: 80 % island or peninsula CS territories: 62,5 % bank

24 habitat preferences distance to vegetation 100 bushes forest LRP in m 40 LRP CS 20 CS 0 LRP territories: 25 m /57 m CS territories: 10 m / 26 m

25 habitat preferences river broadness m LRP CS LRP territories: 238 m CS territories: 117 m

26 habitat parameters on breeding grounds? deadwood mud gravel (> 5 cm) bushes gravel (< 5cm) ground vegetation

27 summary population in Tyrol 2012 trend over reference years both populations slightly decreasing water engeneering increasing vegetation disturbance by humans different habitate preferences vegetation density river broadness habitat parameters on breeding grounds

28 Drau Are these Species indicators for river dynamics? bp 1994 & : 4 bp 1994: 1 bp 2012: 0 bp 1994: 1 bp 2012: 1 bp 2012: 2 bp 1994: 2 bp 2012: 0 bp 1994: 5 bp 2012: 0 bp

29 Isel Bp 1994 & : 0 bp 2012: 1 bp 1994: 2 bp 2012: 3 bp 1994: 3 bp 2012: 16 bp 1994: 1 bp 2012: 7bp

30 indicator Are CSP and / or LRP indicator species for river dynamics? CSP is more suitable to controll the sucess of small river renaturation (as a result of habitat preferences) Contrary population trends between the river Drau and isel as a result of water engeneering? Restoration on River Inn (Pettnau, Kössen...); new territories are found safeguarding (protective measures): protecting rivers with natural river dynamics visitor control river restorations & revitalization (esp. Common Sandpiper)

31 Thank you!