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La importancia del manejo: contribuciones de las cercas vivas para mantener la diversidad de aves en paisajes agrícolas

by Garbach, K; Martínez Salinas, A; DeClerck, F.
Series: Mesoamericana (México).Publisher: sl Nov. 2010Description: 14 p.ISSN: 1659-2794.Other Title: The importance of management: contributions of live fences to maintaining bird diversity in agricultural landscapes.Subject(s): CERCA VIVA | BIODIVERSIDAD | CONSERVACION DE LA NATURALEZA | PAJAROS | ESPECIES | TIERRAS AGRICOLAS | PAISAJE | COSTA RICA | HEDGES | BIODIVERSITY | NATURE CONSERVATION | BIRDS | SPECIES | FARMLAND | LANDSCAPE | COSTA RICA | HAIE | BIODIVERSITE | CONSERVATION DE LA NATURE | OISEAU | ESPECE | TERRE AGRICOLE | PAYSAGE | COSTA RICA | CORREDOR BIOLOGICO CORDILLERA VOLCANICA CENTRAL-CORDILLERA DE TALAMANCAOnline Resources: En In: Summary: Se investig{middot}: como el manejo de cercas vivas dentro del Corredor Biol{middot}:gico Volc{middot}{Ostrok}nica Central-Talamanca afecta la riqueza de aves y el uso de recursos. Las especies de aves visitando cercas fueron observadas en tres diferentes tratamientos: cercas vivas multiestrato, cercas vivas simples y control (alambre de p{middot}{ostrok}as). Setenta y cuatro especies de aves fueron observadas utilizando las cercas. La riqueza de especies fue m{middot}{Ostrok}s alta en las cercas multiestrato (28.67 í{deg} 3.98, promedio í{deg} 1 DE), intermedia en las cercas simples (16.20 í{deg} 2.59) y baja en los controles (9.00 í{deg} 2.94). Sin embargo, í{DD}90% de las especies migratorias y especies que utilizan parches de bosque o plantaciones agroforestales fueron observadas tambi{middot}{OElig}n en las cercas multiestrato. El comportamiento en la cerca (percharse, forrajear y reproducirse) fue registrado para los individuos utilizando las cercas activamente. Ambos comportamientos, reproducci{middot}:n y el forrajeo, est{middot}{Ostrok}n asociados con mayor frecuencia a las cercas multiestrato. Las cercas vivas son una fuente importante de recursos naturales dentro del corredor. Un manejo que favorezca la altura y complejidad estructural, caracter{middot}{reg}sticas de las cercas multiestrato, proporciona recursos para un rango de especies diversas y puede favorecer actividades necesarias para sostener sus poblaciones.Summary: This study explores how management of live fences within the Volc{middot}{Ostrok}nica Central-Talamanca Biological Corridor influences bird diversity and resource use. Bird species visiting live fences were recorded for three management treatments: multistrata live fences (dominated by mature, un-pruned trees)Summary: simple live fences (dominated by immature trees, pruned regularly), and control (post-and-wire fences). Seventy-four resident and migratory bird species were observed across treatments. Species richness was highest in multistrata fences (28.67 í{deg} 3.98, mean í{deg} 1 SD) intermediate in simple fences (16.20 í{deg} 2.59), and lowest in post-wirefences (9.00 í{deg} 2.94). However, í{DD}90% of migratory species and species that frequent forest patches and agroforestry plantations at the study site were observed in multistrata fences. In-fence behavior (perching, foraging, reproductive activity) was recorded for individuals actively using fences. Correspondence analysis showed that both foraging and reproductive behavior were more frequently associated with multistrata fences than simple or control fences. Live fences appear to provide important resources within a biological corridor. However, management that favors height and structural complexity, which characterize multistrata fences, enhance corridor use among a diverse range of bird species and may provide greater support for foraging and reproductive activities. Structurally complex live fences are expected to be particularly important for migrants and species that frequent forest and agroforestry patches.
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Se investig{middot}: como el manejo de cercas vivas dentro del Corredor Biol{middot}:gico Volc{middot}{Ostrok}nica Central-Talamanca afecta la riqueza de aves y el uso de recursos. Las especies de aves visitando cercas fueron observadas en tres diferentes tratamientos: cercas vivas multiestrato, cercas vivas simples y control (alambre de p{middot}{ostrok}as). Setenta y cuatro especies de aves fueron observadas utilizando las cercas. La riqueza de especies fue m{middot}{Ostrok}s alta en las cercas multiestrato (28.67 í{deg} 3.98, promedio í{deg} 1 DE), intermedia en las cercas simples (16.20 í{deg} 2.59) y baja en los controles (9.00 í{deg} 2.94). Sin embargo, í{DD}90% de las especies migratorias y especies que utilizan parches de bosque o plantaciones agroforestales fueron observadas tambi{middot}{OElig}n en las cercas multiestrato. El comportamiento en la cerca (percharse, forrajear y reproducirse) fue registrado para los individuos utilizando las cercas activamente. Ambos comportamientos, reproducci{middot}:n y el forrajeo, est{middot}{Ostrok}n asociados con mayor frecuencia a las cercas multiestrato. Las cercas vivas son una fuente importante de recursos naturales dentro del corredor. Un manejo que favorezca la altura y complejidad estructural, caracter{middot}{reg}sticas de las cercas multiestrato, proporciona recursos para un rango de especies diversas y puede favorecer actividades necesarias para sostener sus poblaciones.

This study explores how management of live fences within the Volc{middot}{Ostrok}nica Central-Talamanca Biological Corridor influences bird diversity and resource use. Bird species visiting live fences were recorded for three management treatments: multistrata live fences (dominated by mature, un-pruned trees)

simple live fences (dominated by immature trees, pruned regularly), and control (post-and-wire fences). Seventy-four resident and migratory bird species were observed across treatments. Species richness was highest in multistrata fences (28.67 í{deg} 3.98, mean í{deg} 1 SD) intermediate in simple fences (16.20 í{deg} 2.59), and lowest in post-wirefences (9.00 í{deg} 2.94). However, í{DD}90% of migratory species and species that frequent forest patches and agroforestry plantations at the study site were observed in multistrata fences. In-fence behavior (perching, foraging, reproductive activity) was recorded for individuals actively using fences. Correspondence analysis showed that both foraging and reproductive behavior were more frequently associated with multistrata fences than simple or control fences. Live fences appear to provide important resources within a biological corridor. However, management that favors height and structural complexity, which characterize multistrata fences, enhance corridor use among a diverse range of bird species and may provide greater support for foraging and reproductive activities. Structurally complex live fences are expected to be particularly important for migrants and species that frequent forest and agroforestry patches.

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