Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production
One of the major features of the coastal zone is that part of its sea floor receives a significant amount of sunlight and can therefore sustain benthic primary production by seagrasses, macroalgae, microphytobenthos and corals. However, the contribution of benthic communities to the primary producti...
Published in: | Biogeosciences |
---|---|
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2006
|
Subjects: | |
Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-999 https://doi.org/10.5194/bg-3-489-2006 |
id |
ftncar:oai:drupal-site.org:articles_7334 |
---|---|
record_format |
openpolar |
spelling |
ftncar:oai:drupal-site.org:articles_7334 2023-10-01T03:54:19+02:00 Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production Gattuso, J. (author) Gentili, B. (author) Duarte, C. (author) Kleypas, Joanie (author) Middelburg, J. (author) Antoine, D. (author) 2006-11-06 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-999 https://doi.org/10.5194/bg-3-489-2006 en eng Copernicus Publications Biogeosciences http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-999 doi:10.5194/bg-3-489-2006 ark:/85065/d7sf2wgj Copyright Author(s) 2006. This work is distributed under the Creative Commons Attribution 3.0 License. Arctic region Non-polar region Text article 2006 ftncar https://doi.org/10.5194/bg-3-489-2006 2023-09-04T18:25:25Z One of the major features of the coastal zone is that part of its sea floor receives a significant amount of sunlight and can therefore sustain benthic primary production by seagrasses, macroalgae, microphytobenthos and corals. However, the contribution of benthic communities to the primary production of the global coastal ocean is not known, partly because the surface area where benthic primary production can proceed is poorly quantified. Here, we use a new analysis of satellite (SeaWiFS) data collected between 1998 and 2003 to estimate, for the first time at a nearly global scale, the irradiance reaching the bottom of the coastal ocean. The following cumulative functions provide the percentage of the surface (S) of the coastal zone receiving an irradiance greater than Ez (in mol photons m⁻² d⁻¹): SNon-polar = 29.61 -- 17.92 log10(Ez) + 0.72 log102(Ez) + 0.90 log103(Ez) SArctic = 15.99 -- 13.56 log10(Ez) + 1.49 log102(Ez) + 0.70 log103(Ez) Data on the constraint of light availability on the major benthic primary producers and net community production are reviewed. Some photosynthetic organisms can grow deeper than the nominal bottom limit of the coastal ocean (200 m). The minimum irradiance required varies from 0.4 to 5.1 mol photons m⁻² d⁻¹ depending on the group considered. The daily compensation irradiance of benthic communities ranges from 0.24 to 4.4 mol photons m⁻² d⁻¹. Data on benthic irradiance and light requirements are combined to estimate the surface area of the coastal ocean where (1) light does not limit the distribution of primary producers and (2) net community production (NCP, the balance between gross primary production and community respiration) is positive. Positive benthic NCP can occur over 33% of the global shelf area. The limitations of this approach, related to the spatial resolution of the satellite data, the parameterization used to convert reflectance data to irradiance, the lack of global information on the benthic nepheloid layer, and the relatively limited biological information ... Article in Journal/Newspaper Arctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Biogeosciences 3 4 489 513 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Arctic region Non-polar region |
spellingShingle |
Arctic region Non-polar region Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production |
topic_facet |
Arctic region Non-polar region |
description |
One of the major features of the coastal zone is that part of its sea floor receives a significant amount of sunlight and can therefore sustain benthic primary production by seagrasses, macroalgae, microphytobenthos and corals. However, the contribution of benthic communities to the primary production of the global coastal ocean is not known, partly because the surface area where benthic primary production can proceed is poorly quantified. Here, we use a new analysis of satellite (SeaWiFS) data collected between 1998 and 2003 to estimate, for the first time at a nearly global scale, the irradiance reaching the bottom of the coastal ocean. The following cumulative functions provide the percentage of the surface (S) of the coastal zone receiving an irradiance greater than Ez (in mol photons m⁻² d⁻¹): SNon-polar = 29.61 -- 17.92 log10(Ez) + 0.72 log102(Ez) + 0.90 log103(Ez) SArctic = 15.99 -- 13.56 log10(Ez) + 1.49 log102(Ez) + 0.70 log103(Ez) Data on the constraint of light availability on the major benthic primary producers and net community production are reviewed. Some photosynthetic organisms can grow deeper than the nominal bottom limit of the coastal ocean (200 m). The minimum irradiance required varies from 0.4 to 5.1 mol photons m⁻² d⁻¹ depending on the group considered. The daily compensation irradiance of benthic communities ranges from 0.24 to 4.4 mol photons m⁻² d⁻¹. Data on benthic irradiance and light requirements are combined to estimate the surface area of the coastal ocean where (1) light does not limit the distribution of primary producers and (2) net community production (NCP, the balance between gross primary production and community respiration) is positive. Positive benthic NCP can occur over 33% of the global shelf area. The limitations of this approach, related to the spatial resolution of the satellite data, the parameterization used to convert reflectance data to irradiance, the lack of global information on the benthic nepheloid layer, and the relatively limited biological information ... |
author2 |
Gattuso, J. (author) Gentili, B. (author) Duarte, C. (author) Kleypas, Joanie (author) Middelburg, J. (author) Antoine, D. (author) |
format |
Article in Journal/Newspaper |
title |
Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production |
title_short |
Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production |
title_full |
Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production |
title_fullStr |
Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production |
title_full_unstemmed |
Light availability in the coastal ocean: Impact on the distribution of benthic photosynthetic organisms and their contribution to primary production |
title_sort |
light availability in the coastal ocean: impact on the distribution of benthic photosynthetic organisms and their contribution to primary production |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-999 https://doi.org/10.5194/bg-3-489-2006 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Biogeosciences http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-999 doi:10.5194/bg-3-489-2006 ark:/85065/d7sf2wgj |
op_rights |
Copyright Author(s) 2006. This work is distributed under the Creative Commons Attribution 3.0 License. |
op_doi |
https://doi.org/10.5194/bg-3-489-2006 |
container_title |
Biogeosciences |
container_volume |
3 |
container_issue |
4 |
container_start_page |
489 |
op_container_end_page |
513 |
_version_ |
1778521811869237248 |