Evidence for Optimal Partitioning of Biomass and Nitrogen at a Range of Nitrogen Availabilities for a Fast- and Slow-Growing Species

Werf, Adrie van der; Visser, A. J.; Schieving, Feike; Lambers, Hans

doi:10.2307/2389868

Cited by 102 publications

(57 citation statements)

References 33 publications

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“…A main factor regulating the adaptation of plants to environmental constraints is plasticity in the pattern of resource allocation (Chapin et al, 1987 ;Tilman, 1990 ; Van der Werf et al, 1993). This plasticity has been given a functional interpretation : plants regulate allocation of resources in order to maximize the acquisition of the particular resource that limits growth (Gleeson & Tilman, 1992).…”

Section: mentioning

confidence: 99%

Acquisition and allocation of resources in two waterlogging‐tolerant grasses

Rubio

Lavado

1999

New Phytologist

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This study focuses on the following questions : (i) whether reductions in root :shoot ratio have a cost in terms of nutrient balance of the plant, and (ii) whether changes in resource-allocation patterns are proportional among different resources. Our approach was to analyse the variations in the allocation pattern induced by soil waterlogging. A pot experiment was conducted to analyse the effects of waterlogging on biomass, phosphorus (P) and nitrogen (N) accumulation of Paspalum dilatatum and Danthonia montevidensis, two waterlogging-tolerant grasses. When changing from oxic to anoxic conditions, a common response of these and other waterloggingtolerant grasses is a reduction in allocation to below-ground resources. It was observed that (i) the reduction in root :shoot ratio caused by waterlogging did not have a cost in terms of capacity for nutrient uptake ; (ii) resource partitioning within aerial parts was less sensitive to treatments than partitioning between roots and shoots ; and (iii) biomass does not appear to be a useful currency for evaluating nutrient-allocation patterns, as the allocation of P and N was inadequately represented by biomass. The results presented here indicate that the existence of compensation mechanisms reduces the predictive value of the partition of resources for the capacity of plants to acquire resources. Data on the allocation of nutrients in relation to biomass suggest that the assumptions of independence in the allocation pattern between biomass and limiting nutrients under the effects of environmental factors can be extended.

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Section: mentioning

confidence: 99%

Acquisition and allocation of resources in two waterlogging‐tolerant grasses

Rubio

Lavado

1999

New Phytologist

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“…Partitioning of nitrogen over leaf blades, leaf sheaths and roots (a,1, O~ns and anr) have been derived from the experiments ( Van der Werf et al, 1993b). Firstly, we will describe C~c~, act, O/' nl and o~,r as a function of the internal nitrogen concentration for plants grown under steady-state conditions.…”

Section: Brief Description Of the Modelmentioning

confidence: 99%

“…The first one is the effect of nitrogen supply on partitioning of recently assimilated carbon and nitrogen and its relation to the internal nitrogen status of the plant under steady-state conditions. This relation is d e r i v e d f r o m a s l i g h t l y m o d i f i e d m o d e l presented by Van der Werf et al (1993b). The second topic is modelling allocation of carbon and nitrogen under n o n -s t e a d y -s t a t e nutrient c o n d i t i o n s .…”

Section: Introductionmentioning

confidence: 99%

Allocation of carbon and nitrogen as a function of the internal nitrogen status of a plant: Modelling allocation under non-steady-state situations

Werf

Enserink²,

Smit³

et al. 1993

Plant Soil

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In this paper we model allocation of carbon and nitrogen to roots and leaves as a function of the nitrogen status of a plant. Under steady-state conditions, allocation of carbon and nitrogen to leaves is exponentially (positively) correlated with plant nitrogen concentration, whereas allocation to roots is correlated negatively, also in an exponential manner.Allocation functions derived under steady-state conditions are used to simulate biomass partitioning under non-steady-state nutrient conditions. Upon nitrogen deprivation, measured and simulated values are rather similar with time, suggesting that allocation functions derived under steady-state conditions also hold under non-steady-state conditions.

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“…The deposition of fine sediments reduces oxygen concentrations (Thrush et al 2004), and carbon deposition increases hetrotrophic production which can compete for nutrients with primary producers (Gattuso et al 1998;Orwin et al 2006). Thus, while nutrient enrichment enhances plant growth by reducing the allocation to roots relative to aboveground tissues (Tilman 1988;van der Werf et al 1993;McKee 1996;Koch and Snedaker 1997), reductions in sediment oxygen concentrations and carbon-rich materials may decrease plant growth by increasing relative allocation to roots (McKee 1996;Weisner 1996;Eschen et al 2006). Nutrient enrichment and sedimentation could therefore have opposing effects on ecosystems: nutrient enrichment could stimulate autotrophic production, while the addition of fine sediments could reduce plant growth.…”

Section: Introductionmentioning

confidence: 99%

Mangrove growth in New Zealand estuaries: the role of nutrient enrichment at sites with contrasting rates of sedimentation

et al. 2007

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Mangrove forest coverage is increasing in the estuaries of the North Island of New Zealand, causing changes in estuarine ecosystem structure and function. Sedimentation and associated nutrient enrichment have been proposed to be factors leading to increases in mangrove cover, but the relative importance of each of these factors is unknown. We conducted a fertilization study in estuaries with different sedimentation histories in order to determine the role of nutrient enrichment in stimulating mangrove growth and forest development. We expected that if mangroves were nutrient-limited, nutrient enrichment would lead to increases in mangrove growth and forest structure and that nutrient enrichment of trees in our site with low sedimentation would give rise to trees and sediments that converged in terms of functional characteristics on control sites in our high sedimentation site. The effects of fertilizing with nitrogen (N) varied among sites and across the intertidal zone, with enhancements in growth, photosynthetic carbon gain, N resorption prior to leaf senescence and the leaf area index of canopies being significantly greater at the high sedimentation sites than at the low sedimentation sites, and in landward dwarf trees compared to seaward fringing trees. Sediment respiration (CO 2 efflux) was higher at the high sedimentation site than at the low one sedimentation site, but it was not significantly affected by fertilization, suggesting that the high sedimentation site supported greater bacterial mineralization of sediment carbon. Nutrient enrichment of the coastal zone has a role in facilitating the expansion of mangroves in estuaries of the North Island of New Zealand, but this effect is secondary to that of sedimentation, which increases habitat area and stimulates growth. In estuaries with high sediment loads, enrichment with N will cause greater mangrove growth and further changes in ecosystem function.

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Evidence for Optimal Partitioning of Biomass and Nitrogen at a Range of Nitrogen Availabilities for a Fast- and Slow-Growing Species

Cited by 102 publications

References 33 publications

Acquisition and allocation of resources in two waterlogging‐tolerant grasses

Acquisition and allocation of resources in two waterlogging‐tolerant grasses

Allocation of carbon and nitrogen as a function of the internal nitrogen status of a plant: Modelling allocation under non-steady-state situations

Mangrove growth in New Zealand estuaries: the role of nutrient enrichment at sites with contrasting rates of sedimentation

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