Emergent macrophytes in phosphorus limited marshes: do phosphorus usage strategies change after nutrient addition?

Rejmánková, Eliška; Snyder, Jenise M.

doi:10.1007/s11104-008-9687-0

Cited by 29 publications

(25 citation statements)

References 64 publications

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“…3 and 4). This is consistent with patterns found in a wetland m a c r o p h y t e , E l e o c h a r i s c e l l u l o s a To r r. (Rejmánková and Snyder 2008) and four tropical forest tree species (Mayor et al 2014). There were no consistent NRE trends of the two species in response to N or P addition, indicating that NRE might be at an optimal level that was not substantially affected by increasing P addition.…”

Section: Patterns Of N-and P-resorption Traitssupporting

confidence: 88%

Phosphorus amendment mitigates nitrogen addition-induced phosphorus limitation in two plant species in a desert steppe, China

Huang

Lin

et al. 2015

Plant Soil

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Background and aims The increasing deposition of atmospheric nitrogen (N) due to anthropogenic activities has significantly enhanced N inputs to ecosystems, resulting in an imbalance in the N: phosphorus (P) ratios in plants and soils. This study aimed to determine whether, and to what extent, P addition alleviates Ninduced P limitation in a desert steppe ecosystem. Methods We conducted a multi-level N:P supply experiment (i.e., constant N with varied P-addition levels) for a grass species, Pennisetum centrasiaticum, and a Nfixing species, Glycyrrhiza uralensis. Results With increasing amounts of P addition (thereby decreasing the N:P ratio), green-leaf P concentrations of the two species studied tended to increase, while Presorption proficiency and efficiency tended to decrease.There were no consistent trends in green-leaf N concentrations in response to P addition. However, both species exhibited high N-resorption proficiency, especially in G. uralensis, with high P addition. Generally, the carbon (C):P and N:P ratios both in soils and in green leaves had positive relationships with green-leaf N concentration and P-resorption proficiency of P. centrasiaticum as well as P-resorption traits of G. uralensis, but negative relationships with green-leaf P concentrations in both species. Conclusions Our study indicates that P addition can alter P-conservation strategy and thereby releasing plant species from the N-induced imbalance of N:P ratios. However, large amounts of P addition could overcompensate and pose a risk of N limitation in desert steppe ecosystems.Plant Soil

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Section: Patterns Of N-and P-resorption Traitssupporting

confidence: 88%

Phosphorus amendment mitigates nitrogen addition-induced phosphorus limitation in two plant species in a desert steppe, China

Huang

Lin

et al. 2015

Plant Soil

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“…In a similar wetland system, the Florida Everglades, a sedge, Cladium jamaicense, was reported to grow significantly better in P-enriched areas than in P-limited sites (Richardson et al 1999). The lack of a response to N found in the Belize dataset can be explained by the fact that P limitation overrides any potential effect of higher N content in sediments (Rejmánková and Snyder 2008). Contrary to the results from the field, in the greenhouse the growth of both species was strongly positively correlated with increasing levels of N, while there was less significant (TD) or no significant (EC) response to an increase in P. Why did the species in the greenhouse experiment respond differently?…”

Section: Discussionmentioning

confidence: 93%

Phenolic content and growth of wetland macrophytes: Is the allocation to secondary compounds driven by nutrient availability?

Rejmánková

2015

Folia Geobot

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This study compares soluble phenolics and lignin content in two wetland macrophytes with contrasting life strategies grown under a varying nutrient supply in the field and in a greenhouse experiment. The differences are explained in terms of the protein competition model (PCM) hypothesis relating changes in secondary metabolites to changing nutrient limitation. The two study species, Eleocharis cellulosa (EC) and Typha domingensis (TD), are both widespread in tropical and subtropical freshwater and brackish marshes of the New World, and are often found in P-limited rather than Nlimited conditions. TD is a fast-growing competitor with large nutrient requirements. EC is a stress tolerator, quite well adapted to growth in nutrient-limiting environments. In both species, the concentration of phenolics was negatively correlated with increasing growth (due to increasing nutrient levels). This is in agreement with the PCM hypothesis, which predicts an increase in phenolic synthesis when protein synthesis (and consequently growth) is low due to limited resource availability. An interesting difference was found in the correlation between tissue nutrients and phenolics. TD from both the field and the greenhouse showed a negative correlation between tissue P and phenolics, while EC displayed a significant negative correlation between tissue N and phenolics. EC is adapted to low P, and increased tissue P content represents luxury consumption (uptake of P for storage) which is not reflected in increased growth and thus is not correlated with phenolics. These are the first steps in elucidating the relationship among nutrient availability, growth and phenolic content in two important primary producers of tropical and subtropical marshes.

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“…N/P ratio in live tissue is a good predictor of both P resorption efficiency and P resorption proficiency (Rejmánková 2005). Phosphorus deficiency can lead to an incomplete N resorption (Feller et al 2002) and about 6% increase in nitrogen RE of Typha was documented after P limitation was removed (Rejmánková and Snyder 2008).…”

Section: Primary Productionmentioning

confidence: 99%

The role of macrophytes in wetland ecosystems

Rejmánková¹

2011

J. Ecol. Environ.

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Aquatic macrophytes, often also called hydrophytes, are key components of aquatic and wetland ecosystems. This review is to briefly summarizes various macrophyte classifications, and covers numerous aspects of macrophytes' role in wetland ecosystems, namely in nutrient cycling. The most widely accepted macrophyte classification differentiates between freely floating macrophytes and those attached to the substrate, with the attached, or rooted macrophytes further divided into three categories: floating-leaved, submerged and emergent. Biogeochemical processes in the water column and sediments are to a large extent influenced by the type of macrophytes. Macrophytes vary in their biomass production, capability to recycle nutrients, and impacts on the rhizosphere by release of oxygen and organic carbon, as well as their capability to serve as a conduit for methane. With increasing eutrophication, the species diversity of wetland macrophytes generally declines, and the speciose communities are being replaced by monoculture-forming strong competitors. A similar situation often happens with invasive species. The roles of macrophytes and sediment microorganisms in wetland ecosystems are closely connected and should be studied simultaneously rather than in isolation.

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Emergent macrophytes in phosphorus limited marshes: do phosphorus usage strategies change after nutrient addition?

Cited by 29 publications

References 64 publications

Phosphorus amendment mitigates nitrogen addition-induced phosphorus limitation in two plant species in a desert steppe, China

Phosphorus amendment mitigates nitrogen addition-induced phosphorus limitation in two plant species in a desert steppe, China

Phenolic content and growth of wetland macrophytes: Is the allocation to secondary compounds driven by nutrient availability?

The role of macrophytes in wetland ecosystems

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