Effects of tree pollen on throughfall element fluxes in European forests

IF 3.9 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Biogeochemistry Pub Date : 2023-09-14 DOI:10.1007/s10533-023-01082-3
Arne Verstraeten, Nicolas Bruffaerts, Fabiana Cristofolini, Elena Vanguelova, Johan Neirynck, Gerrit Genouw, Bruno De Vos, Peter Waldner, Anne Thimonier, Anita Nussbaumer, Mathias Neumann, Sue Benham, Pasi Rautio, Liisa Ukonmaanaho, Päivi Merilä, Antti-Jussi Lindroos, Annika Saarto, Jukka Reiniharju, Nicholas Clarke, Volkmar Timmermann, Manuel Nicolas, Maria Schmitt, Katrin Meusburger, Anna Kowalska, Idalia Kasprzyk, Katarzyna Kluska, Łukasz Grewling, Małgorzata Malkiewicz, Lars Vesterdal, Morten Ingerslev, Miklós Manninger, Donát Magyar, Hugues Titeux, Gunilla Pihl Karlsson, Regula Gehrig, Sandy Adriaenssens, Agneta Ekebom, Åslög Dahl, Marco Ferretti, Elena Gottardini
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Abstract

The effects of tree pollen on precipitation chemistry are not fully understood and this can lead to misinterpretations of element deposition in European forests. We investigated the relationship between forest throughfall (TF) element fluxes and the Seasonal Pollen Integral (SPIn) using linear mixed-effects modelling (LME). TF was measured in 1990–2018 during the main pollen season (MPS, arbitrary two months) in 61 managed, mostly pure, even-aged Fagus, Quercus, Pinus, and Picea stands which are part of the ICP Forests Level II network. The SPIn for the dominant tree genus was observed at 56 aerobiological monitoring stations in nearby cities. The net contribution of pollen was estimated as the TF flux in the MPS minus the fluxes in the preceding and succeeding months. In stands of Fagus and Picea, two genera that do not form large amounts of flowers every year, TF fluxes of potassium (K+), ammonium-nitrogen (NH4+-N), dissolved organic carbon (DOC), and dissolved organic nitrogen (DON) showed a positive relationship with SPIn. However- for Fagus- a negative relationship was found between TF nitrate-nitrogen (NO3-N) fluxes and SPIn. For Quercus and Pinus, two genera producing many flowers each year, SPIn displayed limited variability and no clear association with TF element fluxes. Overall, pollen contributed on average 4.1–10.6% of the annual TF fluxes of K+ > DOC > DON > NH4+-N with the highest contribution in Quercus > Fagus > Pinus > Picea stands. Tree pollen appears to affect TF inorganic nitrogen fluxes both qualitatively and quantitatively, acting as a source of NH4+-N and a sink of NO3-N. Pollen appears to play a more complex role in nutrient cycling than previously thought.

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树木花粉对欧洲森林穿透性元素通量的影响
树木花粉对降水化学的影响尚不完全清楚,这可能导致对欧洲森林中元素沉积的误解。利用线性混合效应模型(LME)研究了森林穿透力(TF)元素通量与季节花粉积分(SPIn)之间的关系。TF是在1990-2018年的主要花粉季节(MPS,任意两个月)在61个管理的、大部分是纯的、甚至是老化的Fagus、Quercus、Pinus和Picea林分中测量的,这些林分是ICP森林二级网络的一部分。在邻近城市的56个空气生物监测站观测到优势树种的SPIn。花粉的净贡献估计为MPS中的TF通量减去前几个月和后几个月的通量。在Fagus和Picea这两个每年不大量开花的属的林分中,钾(K+)、铵态氮(NH4+-N)、溶解有机碳(DOC)和溶解有机氮(DON)的TF通量与SPIn呈正相关。然而,对于Fagus,发现TF硝态氮(NO3-N)通量与SPIn之间呈负相关。对于每年产花较多的栎属和松属,SPIn表现出有限的变异性,与TF元素通量没有明确的关联。总体而言,花粉平均贡献了K+>;DOC >; 唐 >; Quercus中NH4+-N贡献最大 >; Fagus >; Pinus >; Picea站着。树木花粉似乎在定性和定量上影响TF无机氮的通量,作为NH4+-N的来源和NO3--N的汇点。花粉在营养循环中的作用似乎比以前想象的更为复杂。
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来源期刊
Biogeochemistry
Biogeochemistry 环境科学-地球科学综合
CiteScore
7.10
自引率
5.00%
发文量
112
审稿时长
3.2 months
期刊介绍: Biogeochemistry publishes original and synthetic papers dealing with biotic controls on the chemistry of the environment, or with the geochemical control of the structure and function of ecosystems. Cycles are considered, either of individual elements or of specific classes of natural or anthropogenic compounds in ecosystems. Particular emphasis is given to coupled interactions of element cycles. The journal spans from the molecular to global scales to elucidate the mechanisms driving patterns in biogeochemical cycles through space and time. Studies on both natural and artificial ecosystems are published when they contribute to a general understanding of biogeochemistry.
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