Continental‐scale biomass redistribution by migratory birds in response to seasonal variation in productivity
Continental‐scale biomass redistribution by migratory birds in response to seasonal variation in productivity
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候鸟响应生产力季节性变化的大陆尺度生物量重新分配
DOI：
10.1111/geb.13460
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发表时间：
2022
影响因子：
6.4
通讯作者：
Storch, ed., David
中科院分区：
文献类型：
--
作者：
Ng, Wee Hao;Fink, Daniel;La Sorte, Frank A.;Auer, Tom;Hochachka, Wesley M.;Johnston, Alison;Dokter, Adriaan M.;Storch, ed., David
AimAnimal的迁徙通常被解释为季节性动态环境中资源跟踪的结果。因此，资源的可获得性应该既影响迁徙动物的分布，也影响它们的季节性丰度。我们研究了初级生产力和候鸟时空分布之间的关系，以评估能量可获得性在鸟类迁徙中的作用。位置北美。整个年度周期，2011-2016。主要分类群研究夜间迁徙的陆鸟。方法我们利用eBird社区科学计划对夜间迁徙的陆鸟的观测，估计总生物量、丰度和物种丰富度的每周空间分布。我们将这些模式与初级生产力和利用植被绿度遥感估测的季节生产力盈余进行了关联。结果所有三个鸟类指标都与初级生产力呈正相关，且与季节性生产力盈余的相关性更为明显。令人惊讶的是，尽管生物量是能量需求的更好指标，但生物量显示出比丰度和丰富度更弱的关联性。这种联系的强度因季节而异，在迁徙期间最弱。在春季迁徙期间，在温带地区，鸟类的生物量在植被变绿之前增加，这一模式也曾被描述为草食性水禽。在美国东南部，春季的生机勃勃与生物量的净减少有关，冬季的生物量大大超过夏季，突出了该地区作为短途候鸟的冬季避难所的地位。主要结论尽管瞬时能量可获得性在影响候鸟分布方面很重要，但生产力与丰富度和丰富度的关系比与生物量更强的关联表明，与能量需求无关的额外驱动因素的作用与生产力无关，但仍与生产力有关。鉴于最近关于北美鸟类区系普遍下降的报告，包括许多常见物种在美国东南部过冬，了解人类活动如何影响该区域的冬季鸟类数量应该是研究的优先事项。
AimAnimal migration is often explained as the result of resource tracking in seasonally dynamic environments. Therefore, resource availability should influence both the distributions of migratory animals and their seasonal abundance. We examined the relationship between primary productivity and the spatio‐temporal distributions of migratory birds to assess the role of energy availability in avian migration.LocationNorth America.Time periodFull annual cycle, 2011–2016.Major taxa studiedNocturnally migrating landbirds.MethodsWe used observations of nocturnally migrating landbirds from the eBird community‐science programme to estimate weekly spatial distributions of total biomass, abundance and species richness. We related these patterns to primary productivity and seasonal productivity surplus estimated using a remotely sensed measure of vegetation greenness.ResultsAll three avian metrics showed positive spatial associations with primary productivity, and this was more pronounced with seasonal productivity surplus. Surprisingly, biomass showed a weaker association than did abundance and richness, despite being a better indicator of energetic requirements. The strength of associations varied across seasons, being the weakest during migration. During spring migration, avian biomass increased ahead of vegetation green‐up in temperate regions, a pattern also previously described for herbivorous waterfowl. In the south‐eastern USA, spring green‐up was instead associated with a net decrease in biomass, and winter biomass greatly exceeded that of summer, highlighting the region as a winter refuge for short‐distance migrants.Main conclusionsAlthough instantaneous energy availability is important in shaping the distribution of migratory birds, the stronger association of productivity with abundance and richness than with biomass suggests the role of additional drivers unrelated to energetic requirements that are nonetheless correlated with productivity. Given recent reports of widespread North American avifaunal declines, including many common species that winter in the south‐eastern USA, understanding how anthropogenic activities are impacting winter bird populations in the region should be a research priority.
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影响因子：
5.9
作者：
T. Blackburn;K. Gaston
通讯作者：
T. Blackburn;K. Gaston
北美鸟类群落的多样性和丰富性未能追踪生产力的变化。
影响因子：
4.8
作者：
L. Dobson;F. L. La Sorte;L. Manne;B. Hawkins
通讯作者：
B. Hawkins
影响因子：
2.7
作者：
Fokkema, Wimke;van der Jeugd, Henk P.;Olff, Han
通讯作者：
Olff, Han
影响因子：
3.5
作者：
Koleček J;Hahn S;Emmenegger T;Procházka P
通讯作者：
Procházka P
新热带-近北极候鸟的冬季栖息地质量、种群限制和保护
DOI：
--
发表时间：
1996
期刊：
影响因子：
--
作者：
T. Sherry;R. Holmes
通讯作者：
R. Holmes