Nutrient pollution enhances productivity and framework dissolution in algae- but not in coral-dominated reef communities

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http://hdl.handle.net/10138/332524

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Roth , F , El-Khaled , Y C , Karcher , D B , Rädecker , N , Carvalho , S , Duarte , C M , Silva , L , Calleja , M L , Moran , X A G , Jones , B H , Voolstra , C R & Wild , C 2021 , ' Nutrient pollution enhances productivity and framework dissolution in algae- but not in coral-dominated reef communities ' , Marine Pollution Bulletin , vol. 168 , 112444 . https://doi.org/10.1016/j.marpolbul.2021.112444

Title: Nutrient pollution enhances productivity and framework dissolution in algae- but not in coral-dominated reef communities
Author: Roth, Florian; El-Khaled, Yusuf C.; Karcher, Denis B.; Rädecker, Nils; Carvalho, Susana; Duarte, Carlos M.; Silva, Luis; Calleja, Maria Ll.; Moran, Xose Anxelu G.; Jones, Burton H.; Voolstra, Christian R.; Wild, Christian
Contributor: University of Helsinki, Tvärminne Zoological Station
Date: 2021-07
Language: eng
Number of pages: 10
Belongs to series: Marine Pollution Bulletin
ISSN: 0025-326X
URI: http://hdl.handle.net/10138/332524
Abstract: Ecosystem services provided by coral reefs may be susceptible to the combined effects of benthic species shifts and anthropogenic nutrient pollution, but related field studies are scarce. We thus investigated in situ how dissolved inorganic nutrient enrichment, maintained for two months, affected community-wide biogeochemical functions of intact coral- and degraded algae-dominated reef patches in the central Red Sea. Results from benthic chamber incubations revealed 87% increased gross productivity and a shift from net calcification to dissolution in algae-dominated communities after nutrient enrichment, but the same processes were unaffected by nutrients in neighboring coral communities. Both community types changed from net dissolved organic nitrogen sinks to sources, but the increase in net release was 56% higher in algae-dominated communities. Nutrient pollution may, thus, amplify the effects of community shifts on key ecosystem services of coral reefs, possibly leading to a loss of structurally complex habitats with carbonate dissolution and altered nutrient recycling.
Subject: Eutrophication
Ecosystem functioning
Carbon and nitrogen cycles
Erosion
Phase-shifts
Nutrient enrichment
RED-SEA
STYLOPHORA-PISTILLATA
DINITROGEN FIXATION
ORGANIC-MATTER
MAJOR SOURCE
NITROGEN
ENRICHMENT
EUTROPHICATION
METABOLISM
ECOSYSTEM
1172 Environmental sciences
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