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Success of Artificial Bird Nests in Burned Gulf Coast Chenier Plain Marshes
Wildlife managers in the Gulf Coast Chenier Plain of Louisiana and Texas frequently burn marshes during winter to improve habitat for wintering waterfowl and furbearers. Such fires dramatically alter vegetation structure and cover, although such changes are generally temporary. However, if vegetatio...
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Published in: | The Southwestern naturalist 2002-12, Vol.47 (4), p.532-538 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
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Citations: | Items that cite this one |
Online Access: | Get full text |
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Summary: | Wildlife managers in the Gulf Coast Chenier Plain of Louisiana and Texas frequently burn marshes during winter to improve habitat for wintering waterfowl and furbearers. Such fires dramatically alter vegetation structure and cover, although such changes are generally temporary. However, if vegetation cover does not recover sufficiently by the start of the subsequent breeding season, nests of marsh birds could be exposed to increased predation rates. We examined effects of burning on 2 measures of vegetation structure and on 2 types of artificial bird nests during breeding seasons (May and June) before and after experimental winter burns (December and January). We found that vegetation structure did not differ between burned and non-burned marshes at 5 months post-burn. Similarly, depredation rates of artificial sparrow and duck nests did not differ between burned and non-burned marshes during the post-burn breeding season. We recommend that managers complete burning programs by the end of January so that sufficient nesting cover develops before the start of the breeding season. /// Administradores de vida silvestre en la costa del Golfo de México Chernier Plain en Louisiana y Texas frecuentemente queman pantanos durante el invierno para mejorar el hábitat para aves acuáticas invernales y animals con piel. Tales fuegos alteran dramáticamente la estructura vegetal y la cubierta, a pesar de que los cambios son generalmente temporarios. Sin embargo, si la cubierta vegetal no se recobra suficientemente para el inicio de la siguiente temporada de apareamiento, los nidos de las aves de pantanos pueden ser expuestos a mayors tasas de depredación. Examinamos los efectos de las quemas en 2 medidas estructurales de vegetación y en 2 tipos de nidos artificiales durante la temporada de apareamiento (mayo y junio) antes y después de quemas invernales experimentales (diciembre y enero). Encontramos que la estructura vegetal no difirió entre pantanos quemados y sin quemar 5 mesas después de la quema. Similarmente, las tasas de depredación en nidos artificiales de gorriones y patos no difirieron entre pantanos quemados y sin quemar durante la temporada de apareamiento después de la quema. Recomendamos que los administradores terminen los programas de quema hacia fines de enero para que se desarrolle suficiente cubierta para nidos antes del inicio de la temporada de apareamiento. |
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ISSN: | 0038-4909 |
DOI: | 10.2307/3672656 |