Quantifying components of the phosphorus cycle in temperate forests

Sohrt, Jakob; Lang, Friederike; Weiler, Markus

doi:10.1002/wat2.1243

Cited by 57 publications

(62 citation statements)

References 503 publications

(868 reference statements)

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“…Furthermore, P available in the upper mineral soil (0.02 mg/g, see Table 2) at our sites appears to be relatively low compared with averages for coniferous (0.84 mg/g) or deciduous (0.98 mg/g) temperate forests (Sohrt, Lang, & Weiler, 2017). Furthermore, P available in the upper mineral soil (0.02 mg/g, see Table 2) at our sites appears to be relatively low compared with averages for coniferous (0.84 mg/g) or deciduous (0.98 mg/g) temperate forests (Sohrt, Lang, & Weiler, 2017).…”

Section: Leaf Litter Elemental Composition: a Proxy Of Ecosystem Nucontrasting

confidence: 54%

ENSO and NAO affect long‐term leaf litter dynamics and stoichiometry of Scots pine and European beech mixedwoods

Andrés

Blanco

Imbert

et al. 2019

Global Change Biology

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Litterfall dynamics (production, seasonality and nutrient composition) are key factors influencing nutrient cycling. Leaf litter characteristics are modified by species composition, site conditions and water availability. However, significant evidence on how large‐scale, global circulation patterns affect ecophysiological processes at tree and ecosystem level remains scarce due to the difficulty in separating the combined influence of different factors on local climate and tree phenology. To fill this gap, we studied links between leaf litter dynamics with climate and other forest processes, such as tree‐ring width (TRW) and intrinsic water‐use efficiency (iWUE) in two mixtures of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) in the south‐western Pyrenees. Temporal series (18 years) of litterfall production and elemental chemical composition were decomposed following the ensemble empirical mode decomposition method and relationships with local climate, large‐scale climatic indices, TRW and Scots pine's iWUE were assessed. Temporal trends in N:P ratios indicated increasing P limitation of soil microbes, thus affecting nutrient availability, as the ecological succession from a pine‐dominated to a beech‐dominated forest took place. A significant influence of large‐scale patterns on tree‐level ecophysiology was explained through the impact of the North Atlantic Oscillation (NAO) and El Niño–Southern Oscillation (ENSO) on water availability. Positive NAO and negative ENSO were related to dry conditions and, consequently, to early needle shedding and increased N:P ratio of both species. Autumn storm activity appears to be related to premature leaf abscission of European beech. Significant cascading effects from large‐scale patterns on local weather influenced pine TRW and iWUE. These variables also responded to leaf stoichiometry fallen 3 years prior to tree‐ring formation. Our results provide evidence of the cascading effect that variability in global climate circulation patterns can have on ecophysiological processes and stand dynamics in mixed forests.

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Section: Leaf Litter Elemental Composition: a Proxy Of Ecosystem Nucontrasting

confidence: 54%

ENSO and NAO affect long‐term leaf litter dynamics and stoichiometry of Scots pine and European beech mixedwoods

Andrés

Blanco

Imbert

et al. 2019

Global Change Biology

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“…The BD of P in the study area was higher than reported for a small number of forest sites in Bol et al () of 7–33 mg/(m 2 year), the mean values for coniferous and deciduous forests of the temperate zone of 38 ± 51 and 57 ± 107 mg/(m 2 year), respectively, compiled in Sohrt et al (), and two sites in Central and South America of 19 mg/(m 2 year) (Tipping et al, ), illustrating that considerable P inputs reached the study ecosystem (Figure ). Our estimated DD of P was higher than the 88 mg/(m 2 year) reported from the Taï tropical rainforest in Côte d'Ivoire attributed to Harmattan dust (Stoorvogel et al, ).…”

Section: Discussionmentioning

confidence: 53%

“…Low weathering rates at our study site were also reflected by the finding that the export of dissolved P with ST ( Figure 1) was at the lower end of the range of 1-1,300 mg/(m 2 year) reported for several temperate and tropical forested catchments (Figure 1; Bol et al, 2017). When the extreme value of 1,300 mg/(m 2 year) · m −2 · year −1 in Bol et al (2017) was disregarded, our export of dissolved P with ST fell in the middle of the reported range of 1-60 mg/(m 2 year) and it was slightly higher than the mean export rates of P with ST from temperate catchments under coniferous (11 ± 20 mg/(m 2 year) and deciduous forest (12 ± 20 mg/(m 2 year) ; Sohrt et al, 2017). The export of P with TSPs ( Figure 1) was much lower than in a study of Meyer and Likens (1979) in a temperate forest, where 800 mg/(m 2 year) P were exported with fine particles.…”

Section: 1029/2018jg004942mentioning

confidence: 67%

Temporal Trends of Phosphorus Cycling in a Tropical Montane Forest in Ecuador During 14 Years

et al. 2019

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Increased bioavailability of P can have a negative impact on plant biodiversity. In an approximately 9‐ha catchment under N + P‐limited megadiverse tropical montane forest in Ecuador, we budgeted all major P fluxes and determined whether the P fluxes changed from 1999 to 2013. Furthermore, we assessed which external drivers (rainfall, total P and acid deposition) caused this potential change. Mean (±SD) annual P deposition (bulk+dry) was 240 ± 270 mg/m2, with the SD reflecting the interannual variation. The annual P flux to the soil via throughfall+stemflow+litterfall was 1,400 ± 170 mg/m2 of which 18 ± 9.2% was leached to below the organic layer. The mineral soil retained 80 ± 12% of the P leached from the organic layer. The mean annual P weathering rate was 79 ± 63 mg/m2. The sum of P fluxes was approximately 5 times larger above than below the mineral soil surface, illustrating that P was tightly cycled in the biological part of the forest. The mean annual canopy budget was negative (−120 ± 280 mg/m2); that is, P was leached from the canopy. Throughfall was the largest source of dissolved P. The P catchment budget (total deposition‐streamflow) was positive (200 ± 270 mg/m2); that is, P was retained, mainly in the soil organic layer. From 1999 to 2013, P fluxes with throughfall, stemflow, and streamflow increased significantly. The strongest driver of the P budgets of the canopy and the catchment was total P deposition. Our results demonstrate that mainly biological processes retained deposited P in the vegetation and the organic layer enhancing the internal P cycle.

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“…While an increase in leaching can explain the decrease of nitrogen availability, the link between climate and phosphorus availability might be more complex than our hypotheses suggest. Long‐term soil development processes, differences in phosphorus deposition or intraspecific tree litter quality responses to climate, that is links that we did (and could) not include in any of the hypothesized models, may have driven the observed phosphorus availability responses to climate (Sohrt, Lang, & Weiler, ).…”

Section: Discussionmentioning

confidence: 99%

Drivers of above‐ground understorey biomass and nutrient stocks in temperate deciduous forests

et al. 2019

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1. The understorey in temperate forests can play an important functional role, depending on its biomass and functional characteristics. While it is known that local soil and stand characteristics largely determine the biomass of the understorey, less is known about the role of global change. Global change can directly affect understorey biomass, but also indirectly by modifying the overstorey, local resource availability and growing conditions at the forest floor.2. In this observational study across Europe, we aim at disentangling the impact of global-change drivers on understorey biomass and nutrient stocks, from the impact of overstorey characteristics and local site conditions. Using piecewise structural equation modelling, we determine the main drivers of understorey biomass and nutrient stocks in these forests and examine potential direct and indirect effects of global-change drivers.3. Tree cover, tree litter quality and differences in former land use were the main drivers of understorey biomass and nutrient stocks, via their influence on understorey light and nitrogen availability and soil acidity. Other global-change drivers, including climate and nitrogen deposition, had similar indirect effects, but these were either weak or only affecting nutrient concentrations, not stocks. 4. Synthesis. We found that direct effects of global-change drivers on understorey biomass and nutrient stocks were absent. The indirect effects of global change, | 983Journal of Ecology LANDUYT eT AL.

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Quantifying components of the phosphorus cycle in temperate forests

Cited by 57 publications

References 503 publications

ENSO and NAO affect long‐term leaf litter dynamics and stoichiometry of Scots pine and European beech mixedwoods

ENSO and NAO affect long‐term leaf litter dynamics and stoichiometry of Scots pine and European beech mixedwoods

Temporal Trends of Phosphorus Cycling in a Tropical Montane Forest in Ecuador During 14 Years

Drivers of above‐ground understorey biomass and nutrient stocks in temperate deciduous forests

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