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首页> 外文期刊>Biology Bulletin >Influence of the Vegetation Structure on the Numbers of Great Snipes (Gallinago media) (Scolopacidae, Aves) at Leks
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Influence of the Vegetation Structure on the Numbers of Great Snipes (Gallinago media) (Scolopacidae, Aves) at Leks

机译：植被结构对列克地区大剪枝（Gallinago媒介）（斯科普酸科，大道）数量的影响

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摘要

The numbers of birds and vegetation structure were analyzed at 13, 7 and 10 leks of great snipes (Gallinago media), which formed at agricultural lands of Moscow Region in 2014-2016, respectively. Not less than 120-130 birds were concentrated on the leks annually, of which 82-94% were males. The numbers of great snipes changed asynchronously at different leks during the breeding season. It depended on neither the lek location (floodplain or watershed) nor the soil penetrability therein. A negative correlation was found between the bird numbers and the height of vegetation (n = 42; R-s = -0.52; p < 0.01) and between the bird numbers and the coverage of vegetation (n = 44; R-s = -0.56; p < 0.01) at the leks during the entire breeding season. Poisson regression has revealed a negative impact (p = 0.0162) of the average grass height on the bird numbers on the leks during the main period of activity of great snipes (May and the first decade of June). However, such relationships were not traced so clear by analyses of the movements of two marked males. A negative correlation between the bird numbers and the variance of grass height (n = 42; R-s = -0.48; p < 0.01) and a positive one between the bird numbers and the variance of grass cover (n = 44; R-s = 0.40; p < 0.01) were found for the entire breeding period (May-June). The numbers of great snipes were found to be positively correlated with the abundance of the lowest vegetation class (10 cm and below) during the entire breeding period (n = 42; R-s = 0.51; p < 0.01) as well as during the period of maximal activity of great snipes (n = 30; R-s= 0.41; p < 0.05). A conclusion was made that the heterogeneity of the projective grass coverage and the presence of fairly large patches with the lowest vegetation rather than the grass height itself are of importance for great snipes when selecting sites for lekking.
机译：分析了2014-2016年在莫斯科地区农业用地上形成的大剪枝（Gallinago媒介）的鸟类，植被结构的数量（分别为13个，7个和10个）。每年不少于120-130只鸟集中在韭葱上，其中82-94％是雄性。在繁殖季节，大剪枝的数量在不同韭葱处异步变化。它既不依赖于沥水的位置（洪泛区或分水岭），也不依赖于土壤的渗透性。鸟类数量与植被高度之间呈负相关（n = 42； Rs = -0.52； p <0.01），鸟类数量与植被覆盖度之间呈负相关（n = 44; Rs = -0.56; p <0.01） 0.01）在整个繁殖季节的韭菜上。泊松回归表明，在大剪枝活动的主要时期（5月和6月的第一个十年），平均草高对韭菜上鸟类数量的负面影响（p = 0.0162）。但是，通过分析两个有标记的雄性的活动，没有很清楚地找到这种关系。鸟类数量与草地高度变化之间呈负相关（n = 42； Rs = -0.48； p <0.01），鸟类数量与草地覆盖度之间存在正相关（n = 44； Rs = 0.40；在整个繁殖期间（5月至6月）发现p <0.01）。在整个繁殖期间（n = 42； Rs = 0.51； p <0.01）以及整个繁殖期，大剪枝的数量与最低植被类别（10 cm及以下）的丰度呈正相关。大片段的最大活动（n = 30; Rs = 0.41; p <0.05）。得出的结论是，投射草覆盖的异质性以及植被最低的相当大的斑块的存在，而不是草的高度本身，对于选择爬水地点的大型剪枝来说非常重要。

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