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首页> 外文期刊>Conservation Evidence >Experimental cutting of the shrub layer did not improve capercaillie Tetrao urogallus breeding success during wet summers in Scots pine forests, Strathspey, UK
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Experimental cutting of the shrub layer did not improve capercaillie Tetrao urogallus breeding success during wet summers in Scots pine forests, Strathspey, UK

机译：在英国Strathspey的苏格兰松树森林中，夏季湿地夏季，灌木层的实验性砍伐并没有改善红毛Te螨（Tetrao urogallus）的繁殖成功率。

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Understanding factors causing the low breeding success of capercaillies Tetrao urogallus is important for the conservation of this species. Here we investigate possible causes of spatial variation in breeding success in two neighbouring Scots pine Pinus sylvestris woods in Scotland, Abernethy Forest and Craigmore Wood. Breeding success declined with increasing June rainfall at both sites, but there was a stronger effect at Abernethy. Average productivity (chicks/female) during 2000-2011 was 1.61 (95% C.I. 1.08-2.41) times greater at Craigmore than Abernethy. It was possible that the difference was due to increased wetting of chicks by vegetation during and after rain at Abernethy, where the vertical density of the shrub and grass layer was greater than at Craigmore. Wet chicks may then die. To test this hypothesis, 2 m wide routes were cut through tall heather Calluna vulgaris at Abernethy, so that broods could move between bilberry Vaccinium myrtillus feeding areas without having to brush against tall dense vegetation. However, there was no improvement in breeding success in the treated area compared to a control area. Possible explanations are that the capercaillies did not use the cut routes, that cutting did not provide sufficiently short vegetation, that rain affects capercaillie chicks in other ways (e.g. through insect availability), or that broods shelter from rain using pine thickets.
机译：了解导致Capercaillies Tetrao urogallus繁殖成功率低的因素对于该物种的保护很重要。在这里，我们调查了两个相邻的苏格兰松树樟子松林（Abernethy Forest和Craigmore Wood）育种成功空间变异的可能原因。随着两个地点六月降雨的增加，繁殖成功率下降，但Abernethy的影响更大。在2000年至2011年期间，克雷格莫尔的平均生产率（雏鸡/女性）比阿伯内西高1.61倍（95％C.I. 1.08-2.41）倍。这种差异可能是由于Abernethy在降雨期间和降雨后植被对雏鸡的浸润增加所致，那里灌木和草层的垂直密度大于Craigmore。湿小鸡可能随后死亡。为了验证这一假设，在Abernethy的高海拔石楠愈伤组织切开了2 m宽的路线，这样幼虫就可以在越橘越桔采食区之间移动，而不必掠过茂密的高大植被。但是，与对照区域相比，治疗区域的育种成功没有改善。可能的解释是：山毛榉没有使用砍伐的路线，伐木没有提供足够短的植被，雨水以其他方式（例如，通过获得昆虫的方式）影响了山毛榉的雏鸡，或者用松树丛防止了幼虫避雨。

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