Predator abundance attenuates positive density-dependent breeding spatial dispersion in a semi-colonial bird
Wawrzynowicz, M.; Kuczynski, L. · ecology · 2026-09-04 · 原文
DOI：10.64898/2026.04.09.716047作者：2 位
The spatial organisation of breeding populations can influence fitness and population dynamics, yet the spatial expression of density dependence may vary with ecological context. We investigated whether predator abundance alters this expression in the northern lapwing (Vanellus vanellus), a loosely social ground-nesting wader. Using long-term breeding-bird monitoring data from agricultural landscapes, we quantified spatial organisation using a Normalised Spatial Dispersion Index (NSDI) and modelled its relationships with lapwing density, hooded crow (Corvus cornix) abundance, habitat composition, and winter climate using generalised additive mixed models. Spatial organisation showed density dependence, but this relationship weakened progressively with increasing crow abundance. At low crow abundance, increasing lapwing density was associated with greater spatial dispersion, whereas the relationship approached zero at high crow abundance. Although it became slightly negative at the upper end of the crow-abundance gradient, uncertainty provided no clear evidence of a reversal to density-dependent aggregation. Broad-scale habitat composition and winter precipitation were not supported
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1. 人话版
The spatial organisation of breeding populations can influence fitness and population dynamics, yet the spatial expression of density dependence may vary with ecological context.
We investigated whether predator abundance alters this expression in the northern lapwing (Vanellus vanellus), a loosely social ground-nesting wader.
2. 领域脉络
本文类目：ecology，属于其所在研究脉络的最新进展。
3. 机制拆解
Using long-term breeding-bird monitoring data from agricultural landscapes, we quantified spatial organisation using a Normalised Spatial Dispersion Index (NSDI) and modelled its relationships with lapwing density, hooded crow (Corvus cornix) abundance, habitat composition, and winter climate using generalised additive mixed models.
At low crow abundance, increasing lapwing density was associated with greater spatial dispersion, whereas the relationship approached zero at high crow abundance.
4. 证据与数字
摘要未给出量化结果——留意原文的实验与数据。
5. 反例与边界
Spatial organisation showed density dependence, but this relationship weakened progressively with increasing crow abundance.
6. 跨领域连接与意外收获
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7. 可复用方法
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