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首页> 外文期刊>The wilson journal of ornithology >NOT ALL NESTING GUILD MEMBERS ARE ALIKE: NEST PREDATORS AND CONSPECIFIC ABUNDANCE DIFFERENTIALLY INFLUENCE NEST SURVIVAL IN THE GROUND-NESTING OVENBIRD (SEIURUS AUROCAPILLA) AND VEERY (CATHARUS FUSCESCENS)
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NOT ALL NESTING GUILD MEMBERS ARE ALIKE: NEST PREDATORS AND CONSPECIFIC ABUNDANCE DIFFERENTIALLY INFLUENCE NEST SURVIVAL IN THE GROUND-NESTING OVENBIRD (SEIURUS AUROCAPILLA) AND VEERY (CATHARUS FUSCESCENS)

机译：并非所有嵌套的公会成员都一样：嵌套捕食者和特定的丰度在地面嵌套的小鸟（SEIURUS AUROCAPILLA）和小鸟（CATHARUS FUSCESCENS）上不同地影响着巢生存

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At the nest guild level, nest predation is a major cause of failure for many passerines. Species differ in behaviors that influence nest predation risk, presenting a challenge to nest survival analyses at the nest guild level. At our study site in southeastern New York, previous findings have suggested rodent nest predator abundance strongly drives daily nest survival of the Veery (Catharus fuscescens), a ground or low shrub-nesting songbird. In cue playback experiments, the sympatric ground-nesting Ovenbird (Seiurus aurocapilla) shows a greater aversion to chipmunk vocalizations than Veeries. These behavioral differences suggest these two sympatric ground-nesters may be driven by different ecological mechanisms despite similarity in their nesting niche. We examined how nest predator abundance, regional songbird abundance, and timing of nest activity during the breeding season influence nest survival in two songbirds from the same nest guild by building competitive models for determining the extrinsic drivers of daily nest survival. Ovenbird nest survival was best described by nest activity date, where nest survival decreased later in the breeding season, and was positively influenced by conspecific density. Nest survival of Veeries was strongly and negatively influenced by both nest predator abundance and regional abundance of Veeries. Thus, the strong relationship between nest predator abundance and nest survival observed in Veeries does not extend to Ovenbirds. These sympatric ground-nesting songbirds differ in how nest predators influence nest survival, therefore highlighting the importance of considering species-specific differences within nesting guilds to better understand nest survival at multiple ecological levels.
机译：在巢会行业，巢捕食是导致许多雀形目失败的主要原因。物种在影响巢穴掠食风险的行为上有所不同，这对巢穴行会水平的巢穴生存分析提出了挑战。在我们位于纽约东南部的研究地点，先前的发现表明，啮齿动物的巢捕食者的数量极大地驱动了地面或低灌木筑巢鸣禽Veery（Catharus fuscescens）的日常巢生存。在提示播放实验中，同伴地面嵌套的Ovenbird（Seiurus aurocapilla）对花栗鼠发声的厌恶程度高于Veeries。这些行为差异表明，尽管同巢的巢穴相似，但这两个同父异母的巢底巢可能是由不同的生态机制驱动的。我们通过建立竞争模型来确定每日巢生存的外部驱动因素，研究了繁殖季节期间巢捕食者的丰度，区域鸣禽的丰富度以及巢活动的时间如何影响同一巢穴公会的两只鸣鸟的巢生存。巢鸟的存活时间最好用巢活动日期来描述，巢巢的存活时间在繁殖季节后期下降，并受同种密度的影响。 Veeries的巢生存受到巢捕食者丰度和Veeries区域丰度的强烈和负面影响。因此，在Veeries中观察到的巢捕食者丰度与巢生存之间的紧密关系并没有扩展到Ovenbirds。这些同伴地筑巢的鸣禽在筑巢掠食者如何影响筑巢生存方面有所不同，因此强调了考虑筑巢行会中特定物种差异以更好地了解多种生态水平下筑巢生存的重要性。

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