Similar parasite communities but dissimilar infection patterns in two closely related chickadee species
Similar parasite communities but dissimilar infection patterns in two closely related chickadee species
复制标题
DOI：
10.1093/ornithology/ukad033
复制
发表时间：
2023-08-24
期刊：
影响因子：
2.3
通讯作者：
Taylor，Scott A.
中科院分区：
文献类型：
--
作者：
Theodosopoulos，Angela N.;Grabenstein，Kathryn C.;Taylor，Scott A.
在科罗拉多州博尔德县，两种常见的鸣禽——黑顶山雀（Poecile atricapillus）和山山雀（Poecile gambeli）之间的含血孢子虫寄生虫群落大致相似。然而，与黑冠山雀相比，山雀似乎更容易感染疟原虫，并且白细胞共患病的可能性更高。我们发现海拔变化（以及相关的生态）驱动了这些寄生虫属的分布。对于博尔德县的山雀来说，环境因素在构建带血孢子虫群落中扮演的角色比宿主进化差异更重要。然而，进化差异可能是影响感染概率、感染负担以及感染是否随时间推移而保持可检测性的关键。我们发现，对于重新捕获的鸟类，它们的感染状态（即是否存在可检测的寄生虫感染）在捕获期间往往保持一致。我们在2017年至2021年间，从低海拔（即博尔德市）到相对较高的海拔（即科罗拉多大学博尔德山研究站），在约1500米的海拔梯度上取样了235只山雀。目前尚不清楚在我们的采样地区，长期的血孢子虫丰度趋势是否随着时间的推移而改变。然而，我们想知道是否潜在的疟原虫易感性和白细胞感染负担的不同模式可能在山山雀的负种群趋势中发挥作用。
Hemosporidian parasite communities are broadly similar in Boulder County, Colorado, between two common songbirds––the Black-capped Chickadee (Poecile atricapillus) and Mountain Chickadee (Poecile gambeli). However, Mountain Chickadees appear more likely to be infected withPlasmodiumand potentially experience higher infection burdens withLeucocytozoonin contrast to Black-capped Chickadees. We found that elevation change (and associated ecology) drives the distributions of these parasite genera. For Boulder County chickadees, environmental factors play a more important role in structuring hemosporidian communities than host evolutionary differences. However, evolutionary differences are likely key to shaping the probability of infection, infection burden, and whether an infection remains detectable over time. We found that for recaptured birds, their infection status (i.e. presence or absence of detectable parasite infection) tends to remain consistent across capture periods. We sampled 235 chickadees between 2017 and 2021 across a ~1,500-m elevation gradient from low elevation (i.e. the city of Boulder) to comparatively high elevation (i.e. the CU Boulder Mountain Research Station). It is unknown whether long-term hemosporidian abundance trends have changed over time in our sampling region. However, we ask whether potentially disparate patterns ofPlasmodiumsusceptibility andLeucocytozooninfection burden could be playing a role in the negative population trends of Mountain Chickadees.