Production-Respiration Relationships at Different Timescales within the Biosphere 2 Coral Reef Biome

Temporal relationships between organic carbon production and respiration are not well understood in coral reef ecosystems. We monitored dissolved oxygen (O2) concentrations within the Biosphere 2 coral reef biome over a 3-yr period (1 January 1997-1 January 2000), to calculate daily rates of gross p...

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Veröffentlicht in:Limnology and oceanography 2001-11, Vol.46 (7), p.1653-1660
Hauptverfasser: Falter, James L., Atkinson, M. J., Langdon, Chris
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creator Falter, James L.
Atkinson, M. J.
Langdon, Chris
description Temporal relationships between organic carbon production and respiration are not well understood in coral reef ecosystems. We monitored dissolved oxygen (O2) concentrations within the Biosphere 2 coral reef biome over a 3-yr period (1 January 1997-1 January 2000), to calculate daily rates of gross production (P), community respiration (R), and net community production (NCP). P averaged 170 mmol $O_2\>m^{-2}\>d^{-1}$, and R averaged 173 mmol $O_2\>m^{-2}\>d^{-1}$, which yielded a mean NCP of only -3 mmol $O_2\>m^{-2}\>d^{-1}$, or a difference of only 2%. This long-term balance between P and R reflects the closed-system design of the biome. The SD of P, however, was ±56 mmol $O_2\>m^{-2}\>d^{-1}$; that of R was ±47 mmol $O_2\>m^{-2}\>d^{-1}$; and that of NCP was ±26 mmol $O_2\>m^{-2}\>d^{-1}$ or ±15% of mean P. To better resolve the behavior of P, R, and NCP at different timescales, each of these time series were spectrally decomposed into four frequency bands that corresponded to four timescales: 3 months (seasonal to annual). At timescales >1 month, the variance of P was not different from the variance of R. At timescales of
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J. ; Langdon, Chris</creator><creatorcontrib>Falter, James L. ; Atkinson, M. J. ; Langdon, Chris</creatorcontrib><description>Temporal relationships between organic carbon production and respiration are not well understood in coral reef ecosystems. We monitored dissolved oxygen (O2) concentrations within the Biosphere 2 coral reef biome over a 3-yr period (1 January 1997-1 January 2000), to calculate daily rates of gross production (P), community respiration (R), and net community production (NCP). P averaged 170 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, and R averaged 173 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, which yielded a mean NCP of only -3 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, or a difference of only 2%. This long-term balance between P and R reflects the closed-system design of the biome. The SD of P, however, was ±56 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$; that of R was ±47 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$; and that of NCP was ±26 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$ or ±15% of mean P. To better resolve the behavior of P, R, and NCP at different timescales, each of these time series were spectrally decomposed into four frequency bands that corresponded to four timescales: &lt;1 week, 1 week-1 month, 1-3 months (subseasonal), and &gt;3 months (seasonal to annual). At timescales &gt;1 month, the variance of P was not different from the variance of R. At timescales of &lt;1 month, the variance in P was significantly greater than the variance in R (P &lt; 0.01). Furthermore, the correlation between changes in P and changes in R became weaker with decreasing timescale. We suggest that changes in P and R become well matched at timescales that coincide with the turnover of carbon by the dominant macroalgae within the biome (1-3 months). 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J.</creatorcontrib><creatorcontrib>Langdon, Chris</creatorcontrib><title>Production-Respiration Relationships at Different Timescales within the Biosphere 2 Coral Reef Biome</title><title>Limnology and oceanography</title><description>Temporal relationships between organic carbon production and respiration are not well understood in coral reef ecosystems. We monitored dissolved oxygen (O2) concentrations within the Biosphere 2 coral reef biome over a 3-yr period (1 January 1997-1 January 2000), to calculate daily rates of gross production (P), community respiration (R), and net community production (NCP). P averaged 170 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, and R averaged 173 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, which yielded a mean NCP of only -3 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, or a difference of only 2%. This long-term balance between P and R reflects the closed-system design of the biome. 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J.</au><au>Langdon, Chris</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Production-Respiration Relationships at Different Timescales within the Biosphere 2 Coral Reef Biome</atitle><jtitle>Limnology and oceanography</jtitle><date>2001-11</date><risdate>2001</risdate><volume>46</volume><issue>7</issue><spage>1653</spage><epage>1660</epage><pages>1653-1660</pages><issn>0024-3590</issn><eissn>1939-5590</eissn><coden>LIOCAH</coden><abstract>Temporal relationships between organic carbon production and respiration are not well understood in coral reef ecosystems. We monitored dissolved oxygen (O2) concentrations within the Biosphere 2 coral reef biome over a 3-yr period (1 January 1997-1 January 2000), to calculate daily rates of gross production (P), community respiration (R), and net community production (NCP). P averaged 170 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, and R averaged 173 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, which yielded a mean NCP of only -3 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$, or a difference of only 2%. This long-term balance between P and R reflects the closed-system design of the biome. The SD of P, however, was ±56 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$; that of R was ±47 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$; and that of NCP was ±26 mmol $O_2\&gt;m^{-2}\&gt;d^{-1}$ or ±15% of mean P. To better resolve the behavior of P, R, and NCP at different timescales, each of these time series were spectrally decomposed into four frequency bands that corresponded to four timescales: &lt;1 week, 1 week-1 month, 1-3 months (subseasonal), and &gt;3 months (seasonal to annual). At timescales &gt;1 month, the variance of P was not different from the variance of R. At timescales of &lt;1 month, the variance in P was significantly greater than the variance in R (P &lt; 0.01). Furthermore, the correlation between changes in P and changes in R became weaker with decreasing timescale. We suggest that changes in P and R become well matched at timescales that coincide with the turnover of carbon by the dominant macroalgae within the biome (1-3 months). In addition, we conclude that measurements of NCP based on daily or weekly data sets are not good indicators of the long-term net metabolic performance of coral reefs.</abstract><cop>Waco, TX</cop><pub>American Society of Limnology and Oceanography</pub><doi>10.4319/lo.2001.46.7.1653</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects Animal and plant ecology
Animal, plant and microbial ecology
Arcologies
Biological and medical sciences
Biomes
Coral reefs
Fundamental and applied biological sciences. Psychology
Marine
Oceans
Reefs
Respiration
Sea water
Sea water ecosystems
Sensors
Statistical variance
Synecology
Time series
title Production-Respiration Relationships at Different Timescales within the Biosphere 2 Coral Reef Biome
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