Department of Biology, Memorial University of Newfoundland, St John's, NL A1B 3X9, Canada.
Department of Biology, Memorial University of Newfoundland, St John's, NL A1B 3X9, Canada.
Trends Ecol Evol. 2020 Nov;35(11):1001-1010. doi: 10.1016/j.tree.2020.07.009. Epub 2020 Aug 12.
Large herbivores can have substantial effects on carbon (C) cycling, yet these animals are often overlooked in C budgets. Zoogeochemical effects may be particularly important in boreal forests, where diverse human activities are facilitating the expansion of large herbivore populations. Here, we argue that considering trophic dynamics is necessary to understand spatiotemporal variability in boreal forest C budgets. We propose a research agenda to scale local studies to landscape extents to measure the zoogeochemical impacts of large herbivores on boreal forest C cycling. Distributed networks of exclosure experiments, empirical studies across gradients in large herbivore abundance, multiscale models using herbivore distribution data, and remote sensing paired with empirical data will provide comprehensive accounting of C source-sink dynamics in boreal forests.
大型食草动物对碳（C）循环有重大影响，但在碳预算中往往被忽视。动物营养动态在北方森林中可能特别重要，在北方森林中，各种人类活动正在促进大型食草动物种群的扩张。在这里，我们认为考虑营养动态是理解北方森林碳预算时空变化的必要条件。我们提出了一个研究议程，将当地的研究扩展到景观范围，以衡量大型食草动物对北方森林碳循环的动物营养动态的影响。通过使用食草动物分布数据的分布式围栏实验网络、大食草动物丰度梯度上的实证研究、多尺度模型以及与实证数据相结合的遥感，可以全面了解北方森林的碳源汇动态。
