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Nest survival of the threatened Campo Miner Geositta poeciloptera: a tropical cavity-nesting grassland bird
Austral Ecology ( IF 1.5 ) Pub Date : 2021-07-02 , DOI: 10.1111/aec.13079 Ricardo Camargos de Meireles 1 , Leonardo Esteves Lopes 2 , Mauro Pichorim 3 , Tamara Luciane de Sousa Silva Machado 4 , Charles Duca 5 , Ricardo Solar 6
Austral Ecology ( IF 1.5 ) Pub Date : 2021-07-02 , DOI: 10.1111/aec.13079 Ricardo Camargos de Meireles 1 , Leonardo Esteves Lopes 2 , Mauro Pichorim 3 , Tamara Luciane de Sousa Silva Machado 4 , Charles Duca 5 , Ricardo Solar 6
Affiliation
Nest survival is a key step in the reproductive biology of birds and is essential for understanding the strategies used to improve the chances of nest success. Here we studied the main factors driving nesting success of the Campo Miner Geositta poeciloptera (Scleruridae), a threatened Neotropical grassland bird that nests in cavities, usually along steep soil banks. We calculated the apparent success and modelled daily nest survival rates (DSR) based on 86 nests monitored to investigate the effects of nest-related covariates on the nest survival. In the DSR modelling, we looked at the effects of reproductive phase (incubation and nestling periods), breeding seasons (years), temporal-trends (linear and quadratic) rainfall and nest’s individual covariates (height, distance from the top of the cavity to the top of the bank, cavity depth and cavity entrance area). The overall apparent nest success was 58% and estimates based on DSRs were ˜45%. Nest phase, cavity entrance area, nest height and a linear time trend were the main factors influencing DSRs. The survival during incubation was lower (˜54%) than during the nestling period (˜83%), and both phases showed higher values in the beginning of the breeding season. Predation was the main driver of nest failure (23.3%, N = 20), followed by nest abandonment (10.5%, N = 9) and nest usurpation (7%, N = 6). Our results allow us to better understand and conserve this threatened species and also shed light in the reproductive ecology of a whole family endemic to the Neotropics.
中文翻译:
受威胁的 Campo Miner Geositta poeciloptera 的巢生存:一种热带洞穴筑巢的草原鸟类
巢存活是鸟类生殖生物学的关键步骤,对于了解用于提高巢成功机会的策略至关重要。在这里,我们研究了推动 Campo Miner Geositta poeciloptera筑巢成功的主要因素(Scleuridae),一种受威胁的新热带草原鸟类,在洞穴中筑巢,通常沿着陡峭的土堤。我们根据监测的 86 个巢计算了明显的成功率并模拟了每日巢存活率 (DSR),以研究与巢相关的协变量对巢存活的影响。在 DSR 模型中,我们研究了繁殖阶段(孵化和雏鸟时期)、繁殖季节(年)、时间趋势(线性和二次)降雨和巢穴的个体协变量(高度、从洞顶到洞顶的距离)的影响。堤顶、型腔深度和型腔入口面积)。整体明显的巢成功率为 58%,基于 DSR 的估计为~45%。巢相、腔入口面积、巢高度和线性时间趋势是影响 DSR 的主要因素。孵化期间的存活率(~54%)低于雏鸟期(~83%),并且两个阶段在繁殖季节开始时都显示出更高的值。捕食是巢穴失败的主要驱动因素(23.3%,N = 20),其次是弃巢(10.5%,N = 9)和侵占巢穴(7%,N = 6)。我们的研究结果使我们能够更好地了解和保护这种受威胁的物种,并阐明新热带地区特有的整个家庭的生殖生态学。
更新日期:2021-07-02
中文翻译:
受威胁的 Campo Miner Geositta poeciloptera 的巢生存:一种热带洞穴筑巢的草原鸟类
巢存活是鸟类生殖生物学的关键步骤,对于了解用于提高巢成功机会的策略至关重要。在这里,我们研究了推动 Campo Miner Geositta poeciloptera筑巢成功的主要因素(Scleuridae),一种受威胁的新热带草原鸟类,在洞穴中筑巢,通常沿着陡峭的土堤。我们根据监测的 86 个巢计算了明显的成功率并模拟了每日巢存活率 (DSR),以研究与巢相关的协变量对巢存活的影响。在 DSR 模型中,我们研究了繁殖阶段(孵化和雏鸟时期)、繁殖季节(年)、时间趋势(线性和二次)降雨和巢穴的个体协变量(高度、从洞顶到洞顶的距离)的影响。堤顶、型腔深度和型腔入口面积)。整体明显的巢成功率为 58%,基于 DSR 的估计为~45%。巢相、腔入口面积、巢高度和线性时间趋势是影响 DSR 的主要因素。孵化期间的存活率(~54%)低于雏鸟期(~83%),并且两个阶段在繁殖季节开始时都显示出更高的值。捕食是巢穴失败的主要驱动因素(23.3%,N = 20),其次是弃巢(10.5%,N = 9)和侵占巢穴(7%,N = 6)。我们的研究结果使我们能够更好地了解和保护这种受威胁的物种,并阐明新热带地区特有的整个家庭的生殖生态学。