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THE IMPACT OF NUTRIENT LOADING ON THE SOIL AND ROOT RESPIRATION RATES OF FLORIDA MANGROVES
Title
THE IMPACT OF NUTRIENT LOADING ON THE SOIL AND ROOT RESPIRATION RATES OF FLORIDA MANGROVES.
Creator
Faron, Natalie Therese, Benscoter, Brian, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
Abstract/Description
Coastal nutrient loading is a growing concern in urbanized communities and has led to alterations in above- and belowground processes throughout estuarine systems. Mangrove forests are highly productive coastal habitats that exhibit large carbon stocks contained mostly to the deep soils. Since nutrient enrichment has been found to increase mangrove aboveground growth, it’s presumed that nutrient enrichment will also increase belowground respiration rates. Disturbances in soil nutrient content...
Show moreCoastal nutrient loading is a growing concern in urbanized communities and has led to alterations in above- and belowground processes throughout estuarine systems. Mangrove forests are highly productive coastal habitats that exhibit large carbon stocks contained mostly to the deep soils. Since nutrient enrichment has been found to increase mangrove aboveground growth, it’s presumed that nutrient enrichment will also increase belowground respiration rates. Disturbances in soil nutrient content may alter the mangrove carbon cycle by increasing the amount of CO2 lost to the atmosphere from enhanced microbial and root respiration. In this study, soil respiration responded greatest to nitrogen enrichment, but pneumatophore root respiration responded greatest to phosphorus enrichment. Nutrient limitation can shift between different ecological processes and responses to nutrient enrichment tend to be system specific in tidally influenced ecosystems. Understanding the implications of coastal nutrient loading will improve ecosystem models of carbon exchange and belowground processes.
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Date Issued
2021
PURL
http://purl.flvc.org/fau/fd/FA00013767
Subject Headings
Mangrove forests, Soil respiration, Carbon cycle (Biogeochemistry)
Format
Document (PDF)
The effects of an external nasal dilator on the work of breathing during exercise
Title
The effects of an external nasal dilator on the work of breathing during exercise.
Creator
James, Todd Robert., Florida Atlantic University, O'Kroy, Joseph A.
Abstract/Description
Effects of an external nasal dilator on the work of breathing was measured during exercise in 14 untrained students (age, 24 $\pm$ 3 yr.). Two maximal, incremental ergometer tests were performed to exhaustion. Subjects wore a placebo or an active nasal dilator strip, in random order, during each test. Measurement of inspiratory elastic work (inew), inspiratory resistive work (inrw), and expiratory resistive work (exrw) was done using an esophageal balloon. Measured variables included VO$\sb2$...
Show moreEffects of an external nasal dilator on the work of breathing was measured during exercise in 14 untrained students (age, 24 $\pm$ 3 yr.). Two maximal, incremental ergometer tests were performed to exhaustion. Subjects wore a placebo or an active nasal dilator strip, in random order, during each test. Measurement of inspiratory elastic work (inew), inspiratory resistive work (inrw), and expiratory resistive work (exrw) was done using an esophageal balloon. Measured variables included VO$\sb2$, V$\rm\sb{E}$, V$\rm\sb{T}$, frequency of breathing (f), inew, inrw, and exrw, (work expressed in joules). There were no significant differences in VO$\sb2$, V$\rm\sb{E}$, V$\rm\sb{T}$ or f between groups ($\rm p>0.05$). No significant difference was found at peak exercise between groups (mean $\pm$ SD; Placebo; inew, $1.1\pm0.6$ J, inrw, $1.4\pm0.8$ J, exrw $2.2\pm1.8$ J; Active; inew, $1.0\pm0.5$ J, inrw, $1.3\pm0.7$ J, exrw, $1.8\pm0.9$ J; $\rm p>0.05$). Wearing an external nasal dilator does not significantly reduce the work of breathing during exercise.
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Date Issued
1999
PURL
http://purl.flvc.org/fcla/dt/15691
Subject Headings
Respiration--Measurement, Exercise--Physiological aspects
Format
Document (PDF)
Responses of photosynthesis, respiration, growth and cellular constituents to hypo-osmotic shock in the red alga Gracilaria tikvahiae
Title
Responses of photosynthesis, respiration, growth and cellular constituents to hypo-osmotic shock in the red alga Gracilaria tikvahiae.
Creator
Lapointe, Brian E., Rice, D. L., Lawrence, J. M.
Date Issued
1984
PURL
http://purl.flvc.org/FCLA/DT/3353746
Subject Headings
Gracilaria, Algae--Physiology, Photosynthesis, Respiration, Growth, Osmotic Pressure, Salinity
Format
Document (PDF)
Respiration and carbon turnover rates of medusae from the NE Pacific
Title
Respiration and carbon turnover rates of medusae from the NE Pacific.
Creator
Larson, R. J., Harbor Branch Oceanographic Institute
Date Issued
1987
PURL
http://purl.flvc.org/FCLA/DT/3353790
Subject Headings
Medusae, Respiration, Carbon, Carbon cycle (Biogeochemistry)--Pacific Ocean Region
Format
Document (PDF)