Journal Article10.1023/A:1021166010892
Nitrogen vs. phosphorus limitation across an ecotonal gradient in a mangrove forest
TL;DR: In this paper, a factorial experiment with three nutrient treatment levels (control, N,P) and three zones along a tree-height gradient (fringe, transition, dwarf) on offshore islands in Belize was conducted.
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Abstract: Mangrove forests are characterized by distinctive tree-height gradientsthat reflect complex spatial, within-stand differences in environmentalfactors,including nutrient dynamics, salinity, and tidal inundation, across narrowgradients. To determine patterns of nutrient limitation and the effects ofnutrient availability on plant growth and within-stand nutrient dynamics, weused a factorial experiment with three nutrient treatment levels (control, N,P)and three zones along a tree-height gradient (fringe, transition, dwarf) onoffshore islands in Belize. Transects were laid out perpendicular to theshoreline across a mangrove forest from a fringe stand along the seaward edge,through a stand of intermediate height, into a dwarf stand in the interior ofthe island. At three sites, three trees were fertilized per zone for 2yr. Although there was spatial variability in response, growth byR. mangle was generally nitrogen (N) -limited in thefringe zone;phosphorus (P) -limited in the dwarf zone; and, N- and/or P-limited in thetransition zone. Phosphorus-resorption efficiency decreased in all three zones,and N-resorption efficiency increased in the dwarf zone in response to Penrichment. The addition of N had no effect on either P or N resorptionefficiencies. Belowground decomposition was increased by P enrichment in allzones, whereas N enrichment had no effect. This study demonstrated thatessential nutrients are not uniformly distributed within mangrove ecosystems;that soil fertility can switch from conditions of N to P limitation acrossnarrow ecotonal gradients; and, that not all ecological processes respondsimilarly to, or are limited by, the same nutrient.
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Citations
Spatiotemporal Heterogeneity of Mangrove Root Sphere under a Tropical Monsoon Climate in Eastern Thailand
TL;DR: In this paper, the root mass was observed at 0-10 and 10-20 cm depths across all zones and the living roots were separated into diameter classes, and the soil water salinity was measured at a 10 cm depth.
Twenty-Four Years in the Mud: What Have We Learned About the Natural History and Ecology of the Mangrove Rivulus, Kryptolebias marmoratus?
TL;DR: Field studies of this enigmatic fish have revealed almost amphibious behaviors, and a clearer picture is emerging of adult life, with initial population density estimates now known and some indication of high population turnover in burrows, but juvenile habitat and adult oviposition sites remain unknown.
Pneumatophore CO2 effluxes decrease with increased salinity in mangrove forests of Yucatan, Mexico
Julio A. Salas-Rabaza,Laura Yáñez-Espinosa,Eduardo Cejudo,Gabriela Cerón-Aguilera,Roberth Us-Santamaría,José Luis Andrade +5 more
Shedding light on an extremophile lifestyle through transcriptomics
TL;DR: The first transcriptome analysis for plants for which no prior genomic information was available is presented, suggesting a unique mangrove lifestyle overarching the effects of transcriptome size, habitat, tissue type, developmental stage, and biogeographic and phylogenetic differences between them.
N:P ratios, δ15N fractionation and nutrient resorption along a nitrogen to phosphorus limitation gradient in an oligotrophic wetland complex
Brian K. Sorrell,Catherine Chagué-Goff,Catherine Chagué-Goff,Les M. Basher,Trevor R. Partridge +4 more
TL;DR: In pooled data from all vegetation communities within each site, the mass-based vegetation N:P ratio correlated significantly (r2 = 0.35, P) with other indicators of nutrient acquisition and conservation, such as nitrogen stable isotope fractionation (δ15N), nutrient resorption efficiency (RE) and Resorption proficiency (RP).
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