This dataset provides estimates of seasonal net primary production (NPP) for all taxa of macroalgae sampled in fixed plots of the SBC LTER's long-term kelp removal experiment sites. The experiment was initiated in 2008 at 4 sites; a fifth site as added in 2011. Data collection is ongoing. NPP of understory taxa was calculated using field measurements of irradiance and biomass (derived from abundance) and laboratory estimates of taxon-specific photosynthetic parameters. NPP for the giant kelp, Macrocystis pyrifera, was calculated using linear relationships between frond density in a given season and average NPP for that season.
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SBC LTER: Reef: Seasonal Kelp Forest Community Dynamics: Taxon-specific seasonal net primary production (NPP) for macroalgae
This dataset provides estimates of seasonal net primary production (NPP) for all taxa of macroalgae sampled in fixed plots of the SBC LTER's seasonal kelp forest monitoring sites. The five reefs (Arroyo Quemada 34°28.048’N, 120°07.031’W; Carpinteria 34°23.474’N, 119°32.510’W; Isla Vista 34°23.275’N, 119°32.792’W; Mohawk 34°23.649’N, 119°43.762’W; and Naples 34° 25.342’N, 119° 57.102’W) ranged in depth from 5.8 m to 8.9 m (MLLW) and were chosen to represent a range of physical and biological characteristics known to influence subtidal macroalgal assemblages in the region. NPP of understory taxa was calculated using field measurements of irradiance and biomass (derived from abundance) and laboratory estimates of taxon-specific photosynthetic parameters. NPP for the giant kelp, Macrocystis pyrifera, was calculated using linear relationships between frond density in a given season and average NPP for that season.
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- PAR ID:
- 10660936
- Publisher / Repository:
- Environmental Data Initiative
- Date Published:
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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These data represent values of biomass density for more than 200 species of macroalgae, invertebrates and fish measured in fixed plots at five reefs as part of SBCLTER's seasonal kelp forest monitoring program to track long-term patterns in species abundance and diversity. Taxon-specific relationships between size and mass were applied to field measurements of species abundance to estimate biomass density of each species. The five reefs (Arroyo Quemada 34°28.048’N, 120°07.031’W; Carpinteria 34°23.474’N, 119°32.510’W; Isla Vista 34°23.275’N, 119°32.792’W; Mohawk 34°23.649’N, 119°43.762’W; and Naples 34° 25.342’N, 119° 57.102’W) ranged in depth from 5.8 m to 8.9 m (MLLW) and were chosen to represent a range of physical and biological characteristics known to influence subtidal macroalgal assemblages in the region.more » « less
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{"Abstract":["Begun in spring 2004, this long-term study at the Sevilleta LTER\n examines how fertilization affects above-ground biomass production\n (ANPP) in a mixed desert-grassland. Net primary production is a\n fundamental ecological variable that quantifies rates of carbon\n consumption and fixation. Estimates of NPP are important in\n understanding energy flow at a community level as well as spatial\n and temporal responses to a range of ecological processes. While\n measures of both below- and above-ground biomass are important in\n estimating total NPP, this study focuses on above-ground net primary\n production (ANPP). Above-ground net primary production is the change\n in plant biomass, including loss to death and decomposition, over a\n given period of time. Volumetric measurements are made using\n vegetation data from permanent plots (SEV155, "Nitrogen\n Fertilization Experiment (NFert): Net Primary Production Quadrat\n Data") and regressions correlating species biomass and volume\n constructed using seasonal harvest weights from SEV157, "Net\n Primary Productivity (NPP) Weight Data." This site was burned\n by a prescribed fire in 2003."]}more » « less
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{"Abstract":["Begun in fall 2006, this long-term study at the Sevilleta LTER\n examines changes in net primary production (NPP) caused by increased\n precipitation variability within a semiarid grassland. Net primary\n production is a fundamental ecological variable that quantifies\n rates of carbon consumption and fixation. Estimates of NPP are\n important in understanding energy flow at a community level as well\n as spatial and temporal responses to a range of ecological\n processes. While measures of both below- and above-ground biomass\n are important in estimating total NPP, this study focuses on\n above-ground net primary production (ANPP). Above-ground net primary\n production is the change in plant biomass, including loss to death\n and decomposition, over a given period of time. Volumetric\n measurements are made using vegetation data from permanent plots\n (SEV188, "Monsoon Rainfall Manipulation Experiment (MRME): Net\n Primary Production Quadrat Data") and regressions correlating\n species biomass and volume constructed using seasonal harvest\n weights from SEV157, "Net Primary Productivity (NPP) Weight\n Data.""]}more » « less
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{"Abstract":["Net primary production is a fundamental ecological variable that\n quantifies rates of carbon consumption and fixation. Estimates of\n NPP are important in understanding energy flow at a community level\n as well as spatial and temporal responses to a range of ecological\n processes. While measures of both below- and above-ground biomass\n are important in estimating total NPP, this study focuses on\n above-ground net primary production (ANPP). Above-ground net primary\n production is the change in plant biomass, including loss to death\n and decomposition, over a given period of time. Volumetric\n measurements are made using vegetation data from permanent plots\n collected in SEV297, "Extreme Drought in Grassland Ecosystems\n (EDGE) Net Primary Production Quadrat Data" and regressions\n correlating biomass and volume constructed using seasonal harvest\n weights from SEV157, "Net Primary Productivity (NPP) Weight\n Data.""]}more » « less
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