Disease or drought: environmental fluctuations release zebra from a potential pathogen-triggered ecological trap.
Disease or drought: environmental fluctuations release zebra from a potential pathogen-triggered ecological trap.
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DOI：
10.1098/rspb.2021.0582
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发表时间：
2021-06-09
期刊：
影响因子：
--
通讯作者：
Turner WC
中科院分区：
文献类型：
--
作者：
Huang YH;Joel H;Küsters M;Barandongo ZR;Cloete CC;Hartmann A;Kamath PL;Kilian JW;Mfune JKE;Shatumbu G;Zidon R;Getz WM;Turner WC
当环境持久性病原体的传播热点在高质量的栖息地建立时，疾病可能对宿主种群产生强烈影响。然而，波动的环境条件导致栖息地质量和动物栖息地偏好的异质性，这可能会中断选择和风险栖息地之间的重叠。我们结合遥感和宿主遥感数据，评估了纳米比亚埃托沙国家公园平原斑马（Equus quagga）种群炭疽死亡率的时空模式。草食动物的炭疽死亡率在开放生境中的比例高于其他生境类型。资源选择功能表明，斑马人口改变栖息地的选择，在降雨量和植被生产力的变化。平均到高降雨量的年份支持了更大规模的炭疽疫情，动物聚集在首选的开放栖息地，而严重的干旱迫使动物进入其他不太喜欢的栖息地，导致炭疽死亡率很低。因此，炭疽爆发的时间与对开阔平原栖息地的偏好以及病原体暴露的相应增加是一致的。由于栖息地偏好的变化，高质量栖息地和高风险栖息地的重叠是间歇性的，减少了对人口的不利影响。
When a transmission hotspot for an environmentally persistent pathogen establishes in otherwise high-quality habitat, the disease may exert a strong impact on a host population. However, fluctuating environmental conditions lead to heterogeneity in habitat quality and animal habitat preference, which may interrupt the overlap between selected and risky habitats. We evaluated spatio-temporal patterns in anthrax mortalities in a plains zebra (Equus quagga) population in Etosha National Park, Namibia, incorporating remote-sensing and host telemetry data. A higher proportion of anthrax mortalities of herbivores was detected in open habitats than in other habitat types. Resource selection functions showed that the zebra population shifted habitat selection in response to changes in rainfall and vegetation productivity. Average to high rainfall years supported larger anthrax outbreaks, with animals congregating in preferred open habitats, while a severe drought forced animals into otherwise less preferred habitats, leading to few anthrax mortalities. Thus, the timing of anthrax outbreaks was congruent with preference for open plains habitats and a corresponding increase in pathogen exposure. Given shifts in habitat preference, the overlap in high-quality habitat and high-risk habitat is intermittent, reducing the adverse consequences for the population.
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影响因子：
8.8
作者：
Getz WM
通讯作者：
Getz WM
影响因子：
2.2
作者：
Clegg, S. B.;Turnbull, P. C. B.;Lindeque, R. M.
通讯作者：
Lindeque, R. M.
影响因子：
3.7
作者：
Fuller, Trevon L.;Saatchi, Sassan S.;Smith, Thomas B.
通讯作者：
Smith, Thomas B.
影响因子：
4.8
作者：
Cizauskas, Carrie A.;Bellan, Steven E.;Getz, Wayne M.
通讯作者：
Getz, Wayne M.
影响因子：
1.4
作者：
FOLSTAD, I;NILSSEN, AC;ANDERSEN, J
通讯作者：
ANDERSEN, J