Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species

Schelfhout, Stephanie; Wasof, Safaa; Mertens, Jan; Vanhellemont, Margot; Demey, Andreas; Haegeman, Annelies; DeCock, Eva; Moeneclaey, Iris; Vangansbeke, Pieter; Viaene, Nicole; Baeyen, Steve; Sutter, Nancy De; Maes, Martine; Putten, W.H. van der; Verheyen, Kris; Schrijver, An De

doi:10.1016/j.ecolind.2020.106880

Cited by 13 publications

(13 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, excess P, most often due to former agricultural fertilization, has a well‐known negative effect on plant species richness (Ceulemans et al., 2014; Schelfhout et al., 2021; Wassen et al., 2021). Moreover, in contrast to N, P is one of the least mobile mineral nutrients and legacies of P fertilization can last for centuries (Schelfhout et al., 2017).…”

Section: Discussionmentioning

confidence: 99%

Nutrient fertilization by dogs in peri‐urban ecosystems

Frenne

Cougnon

Janssens

et al. 2022

Ecol Sol and Evidence

Self Cite

View full text Add to dashboard Cite

(Semi‐)natural ecosystems provide many important benefits to nature and people, but are often located near populated and urbanized areas across the globe. During recreational activities, many people bring dogs into peri‐urban forests and nature, but their nutrient inputs per unit space and time via dog faeces and urine into ecosystems remain scarcely quantified. Here, we estimate net fertilization rates of dogs in peri‐urban ecosystems, with a focus on nitrogen (N) and phosphorus (P) because of their evident effects on plant biodiversity. We used 487 direct‐count censuses over 1.5 years to collect accurate dog abundance data per hectare per year in four sites in peri‐urban forests and nature reserves in Belgium. Based on estimated dog densities and a systematic literature search of nutrient concentrations in urine and faeces, we calculate N and P fertilization rates from urine and faeces deposits, also propagating uncertainty and variability in these estimates. We find that canine N and P fertilization rates on average amount to 11 kg N (more or less equally from urine and faeces) and 5 kg P (predominantly from faeces) per hectare per year, respectively. These estimated amounts are substantial when compared to atmospheric inputs of N and extractable amounts via traditional nature management (e.g. mowing and hay removal). Our estimated dog N and P fertilization rates in peri‐urban forests and nature are substantial. Such levels of nutrient inputs may considerably influence biodiversity and ecosystem functioning, and co‐determine restoration outcomes. Our results underpin the need for managers and policy makers to more often (i) consider currently neglected nutrient inputs by dogs in management plans and restoration goals, (ii) communicate to dog walkers the role of their dog as ‘fertilizer’ and highlight the necessity to remove at least canine solid faecal waste, (iii) in sensitive oligotrophic ecosystems with species adapted to nutrient‐poor soils, establish nearby off‐leash dog parks, enforce the use of short leashes and/or apply dog bans such that high dog abundances can be avoided.

show abstract

Section: Discussionmentioning

confidence: 99%

Nutrient fertilization by dogs in peri‐urban ecosystems

Frenne

Cougnon

Janssens

et al. 2022

Ecol Sol and Evidence

Self Cite

View full text Add to dashboard Cite

show abstract

“…In soils, the bioavailability of P is very low, reaching only 1 mg kg −1 of soil absorbed by plants as orthophosphate ions. Due to its higher mobility, available Pi to roots is often insufficient in arid neutral and acidic soils and limits plant growth (Schelfhout et al, 2021).…”

Section: P As a Key Element For Plant Growth And Metabolismsmentioning

confidence: 99%

Phosphate-Dependent Regulation of Growth and Stresses Management in Plants

et al. 2021

View full text Add to dashboard Cite

The importance of phosphorus in the regulation of plant growth function is well studied. However, the role of the inorganic phosphate (Pi) molecule in the mitigation of abiotic stresses such as drought, salinity, heavy metal, heat, and acid stresses are poorly understood. We revisited peer-reviewed articles on plant growth characteristics that are phosphorus (P)-dependently regulated under the sufficient-P and low/no-P starvation alone or either combined with one of the mentioned stress. We found that the photosynthesis rate and stomatal conductance decreased under Pi-starved conditions. The total chlorophyll contents were increased in the P-deficient plants, owing to the lack of Pi molecules to sustain the photosynthesis functioning, particularly, the Rubisco and fructose-1,6-bisphosphatase function. The dry biomass of shoots, roots, and P concentrations were significantly reduced under Pi starvation with marketable effects in the cereal than in the legumes. To mitigate P stress, plants activate alternative regulatory pathways, the Pi-dependent glycolysis, and mitochondrial respiration in the cytoplasm. Plants grown under well-Pi supplementation of drought stress exhibited higher dry biomass of shoots than the no-P treated ones. The Pi supply to plants grown under heavy metals stress reduced the metal concentrations in the leaves for the cadmium (Cd) and lead (Pb), but could not prevent them from absorbing heavy metals from soils. To detoxify from heavy metal stress, plants enhance the catalase and ascorbate peroxidase activity that prevents lipid peroxidation in the leaves. The HvPIP and PHO1 genes were over-expressed under both Pi starvation alone and Pi plus drought, or Pi plus salinity stress combination, implying their key roles to mediate the stress mitigations. Agronomy Pi-based interventions to increase Pi at the on-farm levels were discussed. Revisiting the roles of P in growth and its better management in agricultural lands or where P is supplemented as fertilizer could help the plants to survive under abiotic stresses.

show abstract

“…As marsh meadow continuously degraded into the meadow, the comprehensive effects of desiccation and vegetation resulted in a significant increase in soil P availability (Figure 5a-b) through the decrease in labile P loss, according to Kroger et al (2012), and transformation from slow inorganic P and organic P to bioavailable P owing to the activation of organic acids from microbes and plant roots and debris (Hallama et al, 2019;Qualls and Richardson, 2000;Schelfhout et al, 2021;Wang et al, 2021a). However, when the marsh was heavily degraded, soil microbes significantly decreased by 39.3%-94.1% compared with the other three types of wetlands (Pu et al, 2022), and the activities of phosphomonoesterase, phosphodiesterase, and phytase were lower than those in the other wetlands by 50.5%-55.9%, 44.3%-52.6%, and 34.2%-70.5% (data from unpublished results), respectively.…”

Section: Marsh Degradation Alters Soil Phosphorus Availabilitymentioning

confidence: 99%

Transformation of phosphorus forms and its regulation on phosphorus availability across differently degraded marsh soils

Zhang

Luo

et al. 2022

Preprint

View full text Add to dashboard Cite

Soil phosphorus (P) is an essential nutrient that controls wetland productivity and ecological functions. However, the effects of soil P forms on P availability during wetland degradation are relatively unknown. Soil samples from differently degraded marshes, including relatively pristine marsh (RPM), lightly degraded marsh (LDM), moderately degraded marsh (MDM), and heavily degraded marsh (HDM), were collected to investigate the changes in soil P forms and its regulation on P availability in the Zoige Plateau, China. We observed that compared with RPM, the main changes in total P concentration were a significant increase of 31.6%–44.2% in the 0–30 cm soil layers of LDM and MDM, and the available P concentration increased in LDM and MDM but decreased in HDM with a lower P activation coefficient. Marsh degradation increased the concentration and proportion of dicalcium phosphates, P occluded in iron hydroxides, and organic P but decreased those of iron oxide surfaces adsorbed P and apatite P. Soil available P was mainly related to organic P and P non-occluded in iron oxide minerals that might also be non-negligible direct source of available P. The transformation from apatite P to organic P was an important regulation mechanism of P availability in soils during marsh degradation. This study revealed the risk of P limitation in heavily degraded marsh soils and established the mechanism by which marsh degradation significantly influences soil P availability. Therefore, some measure of on improving P availability should be implement for the ecological restoration of heavily degraded marsh in the future, such as grazing exclusion and the application of organic fertiliser.

show abstract

Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species

Cited by 13 publications

References 36 publications

Nutrient fertilization by dogs in peri‐urban ecosystems

Nutrient fertilization by dogs in peri‐urban ecosystems

Phosphate-Dependent Regulation of Growth and Stresses Management in Plants

Transformation of phosphorus forms and its regulation on phosphorus availability across differently degraded marsh soils

Contact Info

Product

Resources

About