2009
DOI: 10.1111/j.1472-4642.2009.00612.x
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The impact of shrub encroachment on savanna bird diversity from local to regional scale

Abstract: Aim Evidence is accumulating of a general increase in woody cover of many savanna regions of the world. Little is known about the consequences of this widespread and fundamental ecosystem structural shift on biodiversity.Location South Africa. Methods We assessed the potential response of bird species to shrub encroachment in a South African savanna by censusing bird species in five habitats along a gradient of increasing shrub cover, from grassland/open woodland to shrubland dominated by various shrub specie… Show more

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Cited by 105 publications
(105 citation statements)
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References 54 publications
(55 reference statements)
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“…1961). For example, shrub encroachment and landscape homogenisation are likely to lead to the loss of bird species associated with open savanna in favour of those associated with forests -since bird assemblages found in the former are distinct from those found in the latter -and ultimately lead to a decrease of bird diversity at landscape level (Sirami et al 2009). Similarly, destruction of open cerrado physiognomies would lead to a habitat simplification and a decrease in bird functional diversity.…”
Section: Resultsmentioning
confidence: 99%
“…1961). For example, shrub encroachment and landscape homogenisation are likely to lead to the loss of bird species associated with open savanna in favour of those associated with forests -since bird assemblages found in the former are distinct from those found in the latter -and ultimately lead to a decrease of bird diversity at landscape level (Sirami et al 2009). Similarly, destruction of open cerrado physiognomies would lead to a habitat simplification and a decrease in bird functional diversity.…”
Section: Resultsmentioning
confidence: 99%
“…En consecuencia, la remoción del matorral significó la perdida de estos recursos y el recambio de los ensambles de aves. Sirami et al (2009), encontraron que en matorrales semi-áridos de Namibia el óptimo en riqueza de aves se registró con coberturas entre el 30-60% del matorral, como las registradas para el matorral de romerillo en áreas sin remoción. Asociaciones entre estos rasgos funcionales y calidad del hábitat se han encontrado en otros ambientes, proporcionando evidencia de la importancia de las estrategias reproductivas y de sobrevivencia, acentuada en especialistas (Vickery et al 2001, Vander Haegen et al 2002, Hartel et al 2014.…”
Section: Discussionunclassified
“…If bush encroachment occurs, arboricides are often used as a chemical bush control agent, with predominantly negative effects on the environment as well as on the quality of farm products such as meat leaving local markets [8]. Furthermore, plant and animal diversity is negatively affected through a decrease in vegetation structural diversity [9][10][11] leading to an overall loss of ecosystem functioning.…”
Section: Introductionmentioning
confidence: 99%