AVIS-IBIS

Birds of Indian Subcontinent

Habitat Use by Non-breeding Shorebirds in Flooding Pampas Grasslands of Argentina

Publication Type:Journal Article
Year of Publication:2003
Authors:Isacch, JPablo, Martínez, MManuel
Journal:Waterbirds
Volume:26
Issue:4
Date Published:2003
ISBN Number:1524-4695
Keywords:Argentina, Charadriidae, Charadrius, Charadrius modestus, Charadrius morinellus, Dominica, Ereunetes subruficollis, Eudromias morinellus, Eudromias ruficollis, Oreopholus, Oreopholus ruficollis, Pampa, Pluvialis, Pluvialis apricaria, Pluvialis dominica, Pluvialis dominicus, Pluvialis fulva, Scolopacidae, Tryngites, Tryngites subruficollis, Xenus, Xenus cinereus, Zonibyx modestus
Abstract:Abstract We identified environmental variables and grassland characteristics that affect the use of natural grasslands by four migratory shorebird species (Patagonian: Rufous-chested Dotterel (Charadrius modestus) and Tawny-throated Dotterel (Oreopholus ruficollis); Nearctic: American Golden Plover (Pluvialis dominica) and Buff-breasted Sandpiper (Tryngites subruficollis)) during the non-breeding season in the flooding pampa region of Argentina. Birds were recorded using fixed-radius point count method, every 15 days between April 1999 and January 2000. A stepwise forward logistic regression was used to examine the relationship between the presence of shorebirds and grassland characteristics and environmental variables. All species correlated positively with the variable ?previous use? suggesting strong site fidelity within years to a wintering site. All species correlated negatively with the percentage of high grass cover, and the American Golden Plover and Buff-breasted Sandpiper both correlated negatively with soil water content. Tawny-throated Dotterel correlated positively with the presence of Stipa neesiana. Previous studies have identified the coastal grasslands of Buenos Aires province as important sites for wintering nearctic and Patagonian grassland shorebirds. This study confirms the importance of this area, and highlights the important role that sheep management plays in maintaining suitable habitat conditions (short grass) for grassland shorebirds.Abstract We identified environmental variables and grassland characteristics that affect the use of natural grasslands by four migratory shorebird species (Patagonian: Rufous-chested Dotterel (Charadrius modestus) and Tawny-throated Dotterel (Oreopholus ruficollis); Nearctic: American Golden Plover (Pluvialis dominica) and Buff-breasted Sandpiper (Tryngites subruficollis)) during the non-breeding season in the flooding pampa region of Argentina. Birds were recorded using fixed-radius point count method, every 15 days between April 1999 and January 2000. A stepwise forward logistic regression was used to examine the relationship between the presence of shorebirds and grassland characteristics and environmental variables. All species correlated positively with the variable ?previous use? suggesting strong site fidelity within years to a wintering site. All species correlated negatively with the percentage of high grass cover, and the American Golden Plover and Buff-breasted Sandpiper both correlated negatively with soil water content. Tawny-throated Dotterel correlated positively with the presence of Stipa neesiana. Previous studies have identified the coastal grasslands of Buenos Aires province as important sites for wintering nearctic and Patagonian grassland shorebirds. This study confirms the importance of this area, and highlights the important role that sheep management plays in maintaining suitable habitat conditions (short grass) for grassland shorebirds.
URL:http://dx.doi.org/10.1675/1524-4695(2003)026[0494:HUBNSI]2.0.CO;2
Short Title:Waterbirds
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith