IMPACT OF BOG RESTAURATION ON THE FAUNA ON THE AUKŠTUMALA RAISED BOG

Transcription

1 IMPACT OF BOG RESTAURATION ON THE FAUNA ON THE AUKŠTUMALA RAISED BOG Lars Briggs & Wouter de Vries, Amphi Consult Final Seminar of LIFE Project RESTORATION OF AUKŠTUMALA RAISED BOG IN NEMUNAS DELTA REGIONAL PARK LIFE AUKSTUMALA LIFE12 NAT/LT/ June, 2017, Ventė, Šilutė region, Lithuania

2 MONITORING EFFECT ON POPULATIONS ENTIRE AREA LAKE AND RIVERS HARVESTED PEAT SUPERFICIAL DRAINED BOG NATURAL BOG SURFACE SMALL DRAINAGE CHANNELS

3 MONITORING OF CHARACTERISTIC BOG PROTECTED HABITAT DIRECTIVE SPECIES Birds: Golden plover Pluvialis apricaria: open bog habitat Wood sandpiper Tringa glareola moor transition pools with pines Monitoring: Breeding bird survey of selected species in the bog 2014, 2016 and 2017

4 Wood sandpiper

5 MONITORING OF CHARACTERISTIC BOG PROTECTED Amphibians: HABITAT DIRECTIVE SPECIES Moor frog Rana arvalis & Pool frog Rana lessonae: Slightly disturbed bog pools (higher ph, mesotrophic) Naturally in lagg zone Monitoring: 2014 & 2016 terr. transects (16 km), 2016 & 2017 larvae Rana arvalis (95 and 54 sites) 2017 egg survey Rana arvalis (285 sites)(incl.damm)

6 RANA ARVALIS Breeding in slightly disturbed bog pools, eggs get invaded by fungy inside the bog. Open bog is valuable foraging area, but wet for hibernation.

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8 RANA LESSONAE Breeding in slightly disturbed bog pools, eggs get invaded by fungy inside the bog. Open bog pools are valuable foraging area, but wet for hibernation.

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10 MONITORING OF CHARACTERISTIC BOG PROTECTED HABITAT DIRECTIVE SPECIES Reptiles: Smooth snake Coronella austriaca (not recorded): Bog with higher areas Monitoring: 2014 terrestrial transects (not recorded), general mapping reptile distribution

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12 MONITORING OF CHARACTERISTIC BOG PROTECTED Dragonflies: HABITAT DIRECTIVE SPECIES Leucorrhinia albifrons: oligotrofic - mesotrophic pools L. pectoralis: more disturbed bog pools - mesotrophic L. caudalis: mesotrohic eutrofic lakes Monitoring: 2014, 2016 & 2017 exhuvia survey (100, 95 & 64 sites) incl. dammed areas

13 Leucorrhinia albifrons bog species Leucorrhinia pectoralis Leucorrhinia caudalis

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15 MONITORING OF CHARACTERISTIC BOG PROTECTED HABITAT DIRECTIVE SPECIES Aquatic diving beetles: Graphoderus bilineatus: oligotrofic - mesotrophic pools on the bog the more disturbed ponds with brownishing of water (pine trees) Monitoring: 2014 dipnetting 50 sites 2016 & and 54 sites (incl. dammed areas)

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17 PROTECTED HABITAT DIRECTIVE SPECIES

18 PROTECTED HABITAT DIRECTIVE SPECIES UNDISTURBED WEST

19 PRISTINE RAISED BOG, NOT GOOD FOR MOST ANNEX IV PROTECTED SPECIES ACID NUTRIENT POOR

20 PRISTINE RAISED BOG, NOT GOOD FOR MOST ANNEX IV PROTECTED SPECIES STABLE WATER TABLE

21 DISTURBED RAISED BOG, GOOD FOR MOST ANNEX IV PROTECTED SPECIES MORE NUTRIENTS, LESS ACID

22 DISTURBED RAISED BOG, GOOD FOR MOST ANNEX IV PROTECTED SPECIES MORE NUTRIENTS, LESS ACID, FLUCTUATION

23 LAGG ZONE IS THE NATURAL HABITAT FOR MOST ANNEX IV PROTECTED SPECIES GROUNDWATER/MINERAL INFLUENCE

24 REWETTENING IMPACT: Restauration of natural hydrology : stable water levels, more acid, stop mineralization, less trees More aquatic habitat for annex IV species in lagg zone 2016 and 2017: Colonization of dammed areas in north and south by: Leucorrhinia pectoralis Leucorrhinia albifrons Rana arvalis Rana lessonae

25 TREE REMOVAL IMPACT: More open bog habitat: Golden plover increase 4-5 pairs Black tailed godwit first breeding in 2016 Wood sandpiper stable 2-4 pairs

26 INSIDE THE BOG STILL SIMILAR CONDITIONS FOR PROTECTED SPECIES 2016/2017

27 REWETTENING IMPACT IN 100 YEARS LESS HABITAT DIRECTIVE SPECIES

28 REWETTENING IMPACT IN 100 YEARS STILL HABITAT FOR DIRECTIVE SPECIES

29 HARVESTED AREA & FORMER LAGG ZONE POTENTIAL AREAS TO DEVELOP

30 IN 100 YEARS RESTORED NATURAL TRANSITION RAISED BOG - LAGG ZONE - RIVER CHARACTERISTIC PRISTINE BOG HABITAT SPECIES BOG & LAGG ZONE HABITAT SPECIES DEVELOPED ANNEX IV SPECIES HABITATS