The biogeochemical boomerang: Site fidelity creates nutritional hotspots that may promote recurrent calving site reuse,Ecology Letters

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The biogeochemical boomerang: Site fidelity creates nutritional hotspots that may promote recurrent calving site reuse
Ecology Letters ( IF 7.6 ) Pub Date : 2024-08-12 , DOI: 10.1111/ele.14491
Kristy M Ferraro ₁ , Dara Albrecht ₂ , Jack G Hendrix ₃ , Eric Vander Wal ₄ , Oswald J Schmitz ₁ , Quinn M R Webber ₅ , Mark A Bradford _{1,

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Affiliation

Animals interact with nutrient cycles by consuming and depositing nutrients, interactions studied separately in nutritional ecology and zoogeochemistry. Recent theoretical work bridges these disciplines, highlighting that animal‐driven nutrient recycling could be crucial in helping animals meet their nutritional needs. When animals exhibit site fidelity, they consistently deposit nutrients, potentially improving vegetation quality. We investigated this potential feedback by analysing changes in forage nitrogen stocks following simulated caribou calving. We found that forage nitrogen stocks increased after 2 weeks and remained elevated after 1 year, a change due to increased forage quality, not quantity. We also developed a nutrient budget within calving grounds, demonstrating that natal fluid and calf carcasses contribute substantial nitrogen subsidies. We, thus, highlight a positive zoogeochemical feedback whereby nutrients deposited during calving become bioavailable during lactation and provide evidence that site fidelity creates a biogeochemical boomerang in which animals deposit nutrients that can be reused later.

中文翻译：

生物地球化学回旋镖：场地保真度创造营养热点，可能促进产犊场地的重复利用

动物通过消耗和储存营养物质与营养循环相互作用，这种相互作用在营养生态学和动物地球化学中分别进行了研究。最近的理论工作将这些学科联系起来，强调动物驱动的营养循环对于帮助动物满足其营养需求至关重要。当动物表现出场地保真度时，它们会持续沉积养分，从而有可能改善植被质量。我们通过分析模拟驯鹿产犊后饲料氮储量的变化来研究这种潜在的反馈。我们发现，饲料氮储量在两周后增加，并在一年后保持在较高水平，这是由于饲料质量而不是数量的增加而导致的变化。我们还在产犊场内制定了营养预算，证明出生液和犊牛尸体贡献了大量的氮补贴。因此，我们强调了积极的动物地球化学反馈，即在产犊期间沉积的营养物质在哺乳期间变得可生物利用，并提供证据表明位点保真度创造了生物地球化学回旋镖，其中动物沉积了可以在以后重复使用的营养物质。

更新日期：2024-08-12

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