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Related Experiment Video

Updated: Dec 30, 2025

A Video Surveillance System to Monitor Breeding Colonies of Common Terns Sterna Hirundo

A Video Surveillance System to Monitor Breeding Colonies of Common Terns Sterna Hirundo

Published on: July 22, 2018

Does intensive goose grazing affect breeding waders?

Jesper Madsen¹, Luna Kondrup Marcussen¹, Niels Knudsen²

¹Department of Bioscience Aarhus University Rønde Denmark.

Ecology and Evolution

|January 16, 2020

Summary

This summary is machine-generated.

Goose grazing in grasslands creates short grass, but wader birds like lapwings still occupied fields. Mosaic vegetation structures and proximity to taller plants may buffer potential negative impacts on nesting and chick survival.

Keywords:

barnacle goose black‐tailed godwit breeding habitat lapwing laser light meadow birds shorebirds

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Area of Science:

Ecology
Wildlife Conservation
Avian Ecology

Background:

Increasing goose populations (Branta leucopsis, Branta bernicla) cause human-wildlife conflicts.
Intensive goose grazing may reduce grassland sward height, potentially harming ground-nesting birds.
The impact of goose grazing on wader occupancy in freshwater grasslands is not fully understood.

Purpose of the Study:

To investigate the effects of goose grazing on nesting and brood-rearing wader occupancy.
To test the hypothesis that shorter sward heights negatively impact wader field occupancy.
To identify key factors influencing wader occupancy in grazed grasslands.

Main Methods:

Studied barnacle and brent geese grazing effects on wader occupancy on Mandø island.
Manipulated sward height by excluding geese from certain fields using laser light.
Analyzed field occupancy based on size, sward height, vegetation mosaic, shrub proximity, and elevation.

Main Results:

Goose grazing resulted in a short grass sward (<5 cm) across most of the study area.
Short vegetation height was the primary factor positively correlating with wader field occupancy.
No negative effects on nesting or chick-rearing wader occupancy were detected, contrary to hypotheses.

Conclusions:

Intensive goose grazing did not negatively impact wader field occupancy, including species preferring taller vegetation.
Mosaic vegetation structures and proximity to taller vegetation likely buffer negative effects of short swards.
Findings suggest waders can adapt to or utilize short swards under specific habitat conditions.