Pine plantations and native forest fragments adjacent to intact forests provide surrogate habitats for birds in an Afrotropical forest landscape

被引:0
作者
Ogola, Simon Peter [1 ,2 ,3 ]
Ssekuubwa, Enock [2 ]
机构
[1] Budongo Conservat Field Stn, Masindi, Uganda
[2] Makerere Univ, Dept Forestry Biodivers & Tourism, Kampala, Uganda
[3] Budongo Conservat Field Stn, POB 362, Masindi, Uganda
关键词
avian diversity; exotic tree species; habitat characteristics; IUCN Red List; point counts; species composition; tropical forest loss; SPECIES RICHNESS; EUCALYPT PLANTATIONS; VEGETATION STRUCTURE; DIVERSITY; COMMUNITY; TIME; BIODIVERSITY; ASSEMBLAGES; DRIVERS; RESERVE;
D O I
10.1111/aje.13242
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Tropical forests harbour 72% of the world's bird species. The changing land uses have fragmented natural forests or replaced them with plantation forests. This sets in an argument as to whether forest fragments and plantations can support birds. We assessed birds in a plantation, fragment and an intact (continuous) Budongo forest, Uganda. We compared bird species composition, diversity and functional traits between the forests and examined their response to habitat characteristics. We sampled birds using 135 point counts along nine transects and assessed habitat characteristics in 90 plots in the fragment and intact forest. We classified bird species according to habitat preference and feeding guild. Bird species composition differed between forests. Bird abundance and richness in plantation and fragment were lower than in intact forest. Forest specialists and insectivores dominated the intact forest. Most birds in the fragment were forest generalists and frugivores. Forest visitors and granivores dominated in the plantation. Trachyphorus purpuratus, Andropadus latirostris and A. curvirostris preferred sites with greater tree height, diameter and many snags, respectively. Bird species abundance and richness declined with increasing tree diameter and increased with snags. Forest specialists preferred sites without climbers. Thus, plantations and fragments close to intact forests provide surrogate habitats for bird conservation. Les forets tropicales abritent 72 % des especes d'oiseaux de la planete. L'evolution de l'utilisation des sols a entraine la fragmentation des forets naturelles ou leur remplacement par des plantations forestieres. Cela souleve la question de savoir si les fragments de foret et les plantations peuvent accueillir des oiseaux. Nous avons evalue les oiseaux dans une plantation, un fragment et une foret intacte (continue) de Budongo, en Ouganda. Nous avons compare la composition, la diversite et les aspects fonctionnels des especes d'oiseaux entre les forets et examine leur reaction aux caracteristiques de l'habitat. Nous avons echantillonne les oiseaux a l'aide de 135 comptages de points le long de neuf transects et evalue les caracteristiques de l'habitat dans 90 parcelles situees dans le fragment et la foret intacte. Nous avons classe les especes d'oiseaux en fonction de leur preference d'habitat et de leur guilde alimentaire. La composition des especes d'oiseaux presentait des differences d'une foret a l'autre. L'abondance et la richesse des oiseaux dans les plantations et les fragments etaient plus faibles que dans les forets intactes. Les specialistes de la foret et les insectivores dominaient la foret intacte. La plupart des oiseaux du fragment etaient des generalistes de la foret et des frugivores. Les visiteurs de la foret et les granivores dominaient dans la plantation. Trachyphorus purpuratus, Andropadus latirostris et A. curvirostris preferaient les sites ayant une hauteur et un diametre d'arbre plus importants et de nombreux chicots, respectivement. L'abondance et la richesse des especes d'oiseaux diminuaient avec l'augmentation du diametre des arbres et augmentaient avec les chicots. Les specialistes de la foret preferent les sites depourvus de plantes grimpantes. Ainsi, les plantations et les fragments proches de forets intactes fournissent des habitats de substitution pour la conservation des oiseaux.
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页数:13
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