Responses of Shorebirds to Disturbance at Roosting Sites

The sources and the frequency of disturbances and the responses of shorebirds to disturbanceswere studied at four roosting sites on Ganghwa Island and Yeongjong Island. The mean frequency of disturbance to roosting shorebirds was 2.7 per hour. Human activities contributed to the disturbance in 65% of all cases. Disturbance frequencies in saltpans were higher than those in the upper tidal zone, fishponds and salt marshes. caused shorebirds to change their behavior and to reduce roosting time at their roosting sites. Four patterns of responses by roosting shorebirds to disturbance were found, including: (1) leaving the roosts, (2) changing their location within the site, (3) leaving and returning, and (4) remaining in place. In the latter three response patterns, the birds tended to remain in their initial roosting sites, in contrast with the leaving pattern, which involved departing from the roosting area. Factors affecting these response patterns were time from high tide and time of day. When the time from high tide was greater, and the time of day was later, more birds stayed at the roost. The absence of sufficient alternative roosts in the study areas forced the birds to choose between

keywords: Behavior, Disturbance, Roosts, ShorebirdsKim, Hwa-Chung and Jeong-Chil Yoo J. Ecol. Field Biol. 30 (1) 70jong Island (N 3727'∼3733', E 12629'∼12635'), which are important stopover sites for migrating shorebirds on the west coast of South Korea. Yeon, Behavior, Disturbance, Roosts, ShorebirdsKim, Hwa-Chung and Jeong-Chil Yoo J. Ecol. Field Biol. 30 (1) 70jong Island (N 3727'∼3733', E 12629'∼12635'), which are important stopover sites for migrating shorebirds on the west coast of South Korea. Yeon

Reference

(1981) The effect of human activity on birds at a coastal bay,

(1986) The effect of human activity on shorebirds in two coastal bays in the northeastern United States,

(1993) Wader disturbance:a theoretical overview, 3-5

(2001) Effects of human activities on the structure of coastal marine bird assemblages in central Chile,

(1993) Human disturbance to waterfowl on estuaries:conservation and coastal management implications of current knowledge, 97-105

(1998) Effects of recreational disturbance on the foraging behavior of waders on a rocky beach,

(1973) Roost selection by waders,

(2001) Why behavioral responses may not reflect the population consequences of human disturbance,

(1993) Impact and extent of recreational disturbance to wader roosts on the Dee estuary,

10.

(1992) Human disturbance of waterfowl,

11.

(2001a) Birds at a southern california beach habitat use and disturbance by human activity,

12.

(2001b) Disturbance to wintering western snowy plovers,

13.

Meire PM, (1991) Effects of a substantial reduction in intertidal area on numbers and densities of waders,

14.

(2001) 2002 Tide tables , NORI

15.

(2000) The energetic cost of short flights in birds,

16.

(1992) The impact of human disturbance on shorebirds at a migration staging area,

17.

(1979) Foraging behaviour and activity budgets of Curlew Sandpipers,

18.

(1996) A guide to the provision of refuges for waders an analysis of 30 years of ringing data from the Wash,

19.

(1993) Effects of disturbance on shorebirds:a summary of existing knowledge from the Dutch Wadden Sea and Delta area, 6-19

20.

(1993) Studies on the effects of disturbances on staging Brent Geese:a progress report, 29-34

21.

(1996) The ability of oystercatchers Haematopus ostralegus to compensate for lost feeding time field studies on individually marked birds,

22.

(2007) Received February 4 2007 Accepted February 17 2007,

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Article Contents

Vol.30 No.1

Responses of Shorebirds to Disturbance at Roosting Sites

Abstract

Reference

Journal of Ecology and Environment