Dispersión de semillas por aves en un bosque templado de Sudamérica austral: ¿quién dispersa a quién?
Dispersión de semillas por aves en un bosque templado de Sudamérica austral: ¿quién dispersa a quién?
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南方南美丛林中的塞米利亚斯分散： ¿
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Marcelo A. Aizen
中科院分区：
文献类型：
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作者：
Guillermo C. Amico;Marcelo A. Aizen
南美洲南部温带森林中鸟类的种子传播：谁传播给谁？许多植物依靠动物传播种子，这一任务主要由鸟类完成，鸟类摄取水果并将种子排出或排出而不受损害。与其他温带森林生物群落不同，南美洲南部温带森林（TFSA）的特点是大量木本植物（约60%的属）产生肉质果实。研究了阿根廷Llao-Llao森林保护区（41∞ 00 iS; 71∞ 30·W）东边界附近以假山毛榉（Nothofagus dombeyi）为主的中温带森林中植物与鸟类扩散者之间的相互作用。我们采样鸟类使用8个雾网和5个视觉/声音普查站在连续两个果季（1999 - 2000年）。我们还记录了6种乔木和灌木的物候和果实的可用性。肠道内容物分析用于确定哪些水果被分散者消耗。通过两种采样方法，共调查了研究区23种鸟类。共捕获鸟类12种296只。我们发现的证据，肉质水果消费只有在两个物种，Elaenia albiceps和Turdus falcklandii，消费的水果和粪便的种子8从9个肉质果实植物物种本地存在。这两种鸟类在森林中常见的果实季节占52%和9%的所有雾网捕获和35%和4%的所有视觉/声音普查，分别。其他鸟类食用水果或种子（不传播它们），昆虫和/或小型脊椎动物。物候记录表明，大多数植物物种
Seed dispersal by birds in a temperate forest of southern South America: Who disperses to whom? : Many plants depend on animals for seed dispersal, a task carried out mainly by birds that ingest fruits and defecate or regurgitate seeds undamaged. Unlike other temperate forest biomes, the Temperate Forest of Southern South America (TFSA) is characterized by a large proportion of woody plants (~ 60% of genera) producing fleshy fruits. We studied the interactions between plants and bird dispersers in a mesic forest dominated by Nothofagus dombeyi at the Llao-Llao Forest Reserve, Argentina (41∞00iS; 71∞ 30·W), close to the eastern boundary of the TFSA. We sampled birds using eight mist-nets and five sight/sound census stations during two consecutive fruiting seasons (1999 - 2000). We also recorded the phenology and fruit availability of six tree and shrub species. Gut content analysis was used to determine which fruits were consumed by the dispersers. Through the two sampling methods, we surveyed a total of 23 bird species occurring in the study area. We captured a total of 296 birds belonging to 12 species. We found evidence of fleshy fruit consumption only in two species, Elaenia albiceps and Turdus falcklandii, that consumed fruits and defecated seeds of eight from the nine fleshy-fruited plant species locally present. These two bird species were common in the forest during the fruiting season accounting for 52% and 9% of all mist-net captures and 35% and 4% of all sight/ sound censuses, respectively. Other birds consumed fruit or seeds (without dispersing them), insects, and/or small vertebrates. Phenological records indicated that most plant species bear