The effects of temperature on soil phosphorus availability and phosphatase enzyme activities: a cross-ecosystem study from the tropics to the Arctic

Shaw, Alanna N.; Cleveland, Cory C.

doi:10.1007/s10533-020-00710-6

Cited by 28 publications

(20 citation statements)

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“…The transfer from litter to plant-available nutrients requires microbial activity, so why did we detect no increase in microbial activity and soil available P pools with warmer soils and higher substrate inputs? In defence of our methods, soil P enzyme activity consistently increases with temperature according to kinetic theory (Shaw and Cleveland 2020), although meta-analyses indicate this increase is minor for hydrolytic v www.esajournals.org enzymes in systems like ours with low warming magnitude and low mean annual temperatures (Xiao et al 2018). Soil microorganisms in our system did not respond to warming with increased P-acquisition (i.e.…”

Section: Why Do Plant and Litter Changes Not Results In Warming Effects Belowground?mentioning

confidence: 50%

Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra

McLaren

Buckeridge

2021

Ecosphere

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Phosphorus (P) limits or co-limits plant and microbial life in multiple ecosystems, including the arctic tundra. Although current global carbon (C) models focus on the coupling between soil nitrogen (N) and C, ecosystem P response to climate warming may also influence the global C cycle. Permafrost soils may see enhanced or reduced P availability under climate warming through multiple mechanisms including changing litter inputs through plant community change, changing plant-microbial dynamics, altered rates of mineralization of soil organic P through increased microbial activity, and newly exposed mineral-bound P via deeper thaw. We investigated the effect of long-term warming on plant leaf, multiple soil and microbial C, N, and P pools, and microbial extracellular enzyme activities, in Alaskan tundra plots underlain by permafrost. Here, we show that 25 yr of experimental summer warming increases community-level plant leaf P through changing community composition to favour relatively P-rich plant species. However, despite associated increases in P-rich litter inputs, we found only a few responses in the belowground pools of P available for plant and microbial uptake, including a weak positive response for citric acid-extractable PO 4 in the surface soil, a decrease in microbial biomass P, and no change in soil P (or C or N) stocks. This weak, neutral, or negative belowground P response to warming despite enhanced litter P inputs is consistent with a growing number of studies in the arctic tundra that find no long-term response of soil C and N stocks to warming.

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Section: Why Do Plant and Litter Changes Not Results In Warming Effects Belowground?mentioning

confidence: 50%

Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra

McLaren

Buckeridge

2021

Ecosphere

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“…The AKP is the key enzyme in the soil phosphorus cycle and directly affects the effectiveness of soil phosphorus (Shaw et al 2020). Among them, alkaline phosphatase is the key enzyme in the soil phosphorus cycle, and directly affects the availability of soil phosphorus (Shaw et al 2020). The results showed that the soil alkaline phosphatase activity increased rst and then decreased with the increase of phosphorus application rate under the same bacteria treatment (Table 2).…”

Section: Discussionmentioning

confidence: 99%

“…At the same time, the soil enzyme activity can re ect the soil biological activity and the soil biochemical reaction intensity (Tischer et al 2014). The AKP is the key enzyme in the soil phosphorus cycle and directly affects the effectiveness of soil phosphorus (Shaw et al 2020). Among them, alkaline phosphatase is the key enzyme in the soil phosphorus cycle, and directly affects the availability of soil phosphorus (Shaw et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Optimizing Phosphorus Application Rate and the Mixed Inoculation of Arbuscular Mycorrhizal Fungi and Phosphate-solubilizing Bacteria Can Improve the Phosphatase Activity and Organic Acid Content in Alfalfa Soil

Liu

et al. 2021

Preprint

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Alfalfa (Medicago sativa L.) is an important high-quality legume forage, and phosphorus is an important nutrient element for high-quality and high-yield of alfalfa. This study assessed the effects bacteria and phosphorus (P) use efficiency of alfalfa soil under different P applications. In this experiment, a two-factor complete randomized block design was used. Four bacterial treatments were as follows: Funneliformis mosseae (Fm), Bacillus megaterium (Bm), double inoculation (Fm × Bm) and no inoculation bacteria (CK). There are four levels of phosphorus treatment, namely: phosphorus application 0 (P0), 50 (P1), 100 (P2), 150 mgkg-1 (P3). There were 16 treatments in total, and each treatment was repeated 6 times. The results showed that the effects of single inoculation and mixed inoculation were significantly higher than those of noninoculation (P < 0.05). With the increase in phosphorus application, each index increased first and then decreased. The alkaline phosphatase activity (AKP) and organic matter (SOM) content in soi lincreased with the increase of cutting times, and the content of organic matter in rhizosphere soil was higher than that in non-rhizosphere soil. Principal component analysis (PCA) shows that the top three treatments were J3P2 > J3P1 > J3P3. Therefore, when (P2O5) was 100 mgkg-1, the mixed inoculation of Fm × Bm could improve the phosphatase activity in alfalfa soil, promote the secretion of organic acids in rhizosphere soil and then improve the content of soil fertility.

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“…As microbial biomass was shown to be rather constant throughout the year (Holmes and Zak, 1994), seasonal differences can be more likely ascribed to changes in microbial activity or in the composition of the microbial communities (Yan et al, 2017). Apart of the general increase in phosphatase activities with rising temperature (Shaw and Cleveland, 2020), additional physical and biological factors may explain the seasonal differences. Low enzymatic activities in winter could be due to lower phosphomonoesterases production with overall lower biological activity or to a lower P demand or lower N availability in winter (Chen et al, 2003;Margalef et al, 2017).…”

Section: Seasonal Patternsmentioning

confidence: 99%

Leaching of Phosphomonoesterase Activities in Beech Forest Soils: Consequences for Phosphorus Forms and Mobility

Fetzer

Loeppmann

Frossard

et al. 2021

Front. For. Glob. Change

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Phosphomonoesterases play an important role in the soil phosphorus (P) cycle since they hydrolyze P monoester to phosphate. Their activity is generally measured in soil extracts, and thus, it remains uncertain how mobile these enzymes are and to which extent they can be translocated within the soil profile. The presence of phosphomonoesterases in soil solutions potentially affects the share of labile dissolved organic P (DOP), which in turn would affect P leaching. Our study aimed at assessing the production and leaching of phosphomonoesterases from organic layers and topsoil horizons in forest soils and its potential effect on dissolved P forms in leachates obtained from zero-tension lysimeters. We measured phosphomonoesterase activities in leached soil solutions and compared it with those in water extracts from litter, Oe/Oa, and A horizons of two beech forests with a contrasting nitrogen (N) and P availability, subjected to experimental N × P fertilization. In addition, we determined phosphate and DOP. In soil solutions leached from litter, Oe/Oa, and A horizons, phosphomonoesterase activities ranged from 2 to 8 μmol L–1 h–1 during summer, but remained below detection limits in winter. The summer values represent 0.1–1% of the phosphomonoesterase activity in soil extracts, indicating that enzymes can be translocated from organic layers and topsoils to greater soil depths. Activities of phosphomonoesterases obtained by water extracts were greater in the organic layer of the P-poor site, while activities of those in soil solutions were similar at the two sites. Nitrogen addition increased phosphomonoesterase activities in leached soil solutions of the organic layer of the N- and P-poor soil. Using a modeling approach, we estimated that approx. 76% of the initial labile DOP was hydrolyzed to dissolved inorganic P within the first 24 h. Back calculations from measured labile DOP revealed an underestimation of approx. 15% of total dissolved P, or 0.03 mg L–1. The observed leaching of phosphomonoesterases implies that labile organic P could be hydrolyzed in deeper soil horizons and that extended sample storage leads to an underestimation of the contribution of DOP to total dissolved P leaching. This has been neglected in the few field studies measuring DOP leaching.

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The effects of temperature on soil phosphorus availability and phosphatase enzyme activities: a cross-ecosystem study from the tropics to the Arctic

Cited by 28 publications

References 50 publications

Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra

Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra

Optimizing Phosphorus Application Rate and the Mixed Inoculation of Arbuscular Mycorrhizal Fungi and Phosphate-solubilizing Bacteria Can Improve the Phosphatase Activity and Organic Acid Content in Alfalfa Soil

Leaching of Phosphomonoesterase Activities in Beech Forest Soils: Consequences for Phosphorus Forms and Mobility

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