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Forskningsartikel2022Vetenskapligt granskadÖppen tillgång

Quantifying effects of wetland restorations on bird communities in agricultural landscapes

Kacergyte, Ineta; Part, Tomas; Berg, Ake; Arlt, Debora; Zmihorski, Michal; Knape, Jonas

Sammanfattning

Restoring wetlands to improve habitats for birds has become an important conservation tool as many wetlands have deteriorated and wetland bird populations declined. To what extent such restorations are effective is not well known because surveys usually either lack data before the restoration or means of correcting for background population trends. We identified wetland restorations made in agricultural landscapes in Sweden and retrieved all available Before-After survey data of breeding birds. From the resulting heterogeneous surveys, we quantified the effectiveness of restorations for eight bird groups comprising 72 bird species from 30 wetlands. We used national survey data to correct for background population trends. We estimated that island breeder populations have increased by between 62 % and 315 % (95 % confidence intervals) following restorations. Deep water foragers, shallow water foragers and short meadow breeders also mainly increased following restoration. The direction of effect was uncertain for tall meadow breeders, reed breeders and predators. Shrubland breeder populations declined between-55 % and-4 % following restorations. While restoration measures seemed to generally benefit about half of the breeding wetland bird community, estimated species-and site-specific re-sponses varied greatly and were associated with large uncertainty. Such heterogeneity in responses can arise due to biotic and abiotic interactions, varying management actions and survey methods between wetlands. Thus, to improve the effectiveness of future wetland restorations, funding bodies and environmental agencies should require standardised Before-After bird surveys at both restored and non-restored reference sites. Such improved survey designs would facilitate the development of more efficient restoration efforts.

Nyckelord

Management; Aves; BACI; Eutrophic lakes; Wetland overgrowth; Freshwater ecosystem

Publicerad i

Biological Conservation
2022, Volym: 273, artikelnummer: 109676
Utgivare: ELSEVIER SCI LTD

      SLU författare

          • Associerade SLU-program

            SLU Centrum för biologisk mångfald, CBM

            Globala målen

            Säkerställa tillgången till och en hållbar förvaltning av vatten och sanitet för alla
            Skydda, återställa och främja ett hållbart nyttjande av landbaserade ekosystem, hållbart bruka skogar, bekämpa ökenspridning, hejda och vrida tillbaka markförstöringen samt hejda förlusten av biologisk mångfald

            UKÄ forskningsämne

            Miljö- och naturvårdsvetenskap
            Ekologi

            Publikationens identifierare

            DOI: https://doi.org/10.1016/j.biocon.2022.109676

            Permanent länk till denna sida (URI)

            https://res.slu.se/id/publ/119027