Hwang Bernice C, Giardina Christian P, Adu-Bredu Stephen, Barrios-Garcia M Noelia, Calvo-Alvarado Julio C, Dargie Greta C, Diao Haoyu, Duboscq-Carra Virginia G, Hemp Andreas, Hemp Claudia, Huasco Walter Huaraca, Ivanov Aleksandr V, Johnson Nels G, Kuijper Dries P J, Lewis Simon L, Lobos-Catalán Paulina, Malhi Yadvinder, Marshall Andrew R, Mumladze Levan, Ngute Alain Senghor K, Palma Ana C, Petritan Ion Catalin, Rordriguez-Cabal Mariano A, Suspense Ifo A, Zagidullina Asiia, Andersson Tommi, Galiano-Cabrera Darcy F, Jiménez-Castillo Mylthon, Churski Marcin, Gage Shelley A, Filippova Nina, Francisco Kainana S, Gaglianese-Woody Morgan, Iankoshvili Giorgi, Kaswamila Mgeta Adidas, Lyatuu Herman, Mampouya Wenina Y E, Materu Brayan, Mbemba M, Moritz Ruslan, Orang Karma, Plyusnin Sergey, Puma Vilca Beisit L, Rodríguez-Solís Maria, Šamonil Pavel, Stępniak Kinga M, Walsh Seana K, Xu Han, Metcalfe Daniel B
Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden.
Department of Ecology and Environmental Science, Umeå University, Linnaeus väg 6, Umeå, Sweden.
Nat Commun. 2024 Jul 17;15(1):6011. doi: 10.1038/s41467-024-50245-9.
Herbivorous insects alter biogeochemical cycling within forests, but the magnitude of these impacts, their global variation, and drivers of this variation remain poorly understood. To address this knowledge gap and help improve biogeochemical models, we established a global network of 74 plots within 40 mature, undisturbed broadleaved forests. We analyzed freshly senesced and green leaves for carbon, nitrogen, phosphorus and silica concentrations, foliar production and herbivory, and stand-level nutrient fluxes. We show more nutrient release by insect herbivores at non-outbreak levels in tropical forests than temperate and boreal forests, that these fluxes increase strongly with mean annual temperature, and that they exceed atmospheric deposition inputs in some localities. Thus, background levels of insect herbivory are sufficiently large to both alter ecosystem element cycling and influence terrestrial carbon cycling. Further, climate can affect interactions between natural populations of plants and herbivores with important consequences for global biogeochemical cycles across broadleaved forests.
食草昆虫会改变森林中的生物地球化学循环，但其影响的程度、全球变化情况以及这种变化的驱动因素仍知之甚少。为了填补这一知识空白并帮助改进生物地球化学模型，我们在40片成熟、未受干扰的阔叶林内建立了一个由74个样地组成的全球网络。我们分析了新衰老和绿色叶片中的碳、氮、磷和硅浓度、叶片产量和食草情况以及林分水平的养分通量。我们发现，在热带森林中，非爆发水平的昆虫食草动物释放的养分比温带和寒温带森林更多，这些通量随年平均温度强烈增加，并且在某些地区超过了大气沉降输入。因此，昆虫食草的背景水平足以改变生态系统元素循环并影响陆地碳循环。此外，气候会影响植物和食草动物自然种群之间的相互作用，对阔叶林的全球生物地球化学循环产生重要影响。
