Oxidative stress biomarkers as potential tools in reef degradation monitoring: A study case in a South Atlantic reef under influence of the 2015–2016 El Niño/Southern Oscillation (ENSO)

Ecological Indicators, Journal Year: 2019, Volume and Issue: 106, P. 105533 - 105533

Published: July 6, 2019

Language: Английский

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Symbiont regulation in Stylophora pistillata during cold stress: an acclimation mechanism against oxidative stress and severe bleaching

Journal of Experimental Biology, Journal Year: 2021, Volume and Issue: 224(3)

Published: Jan. 11, 2021

Widespread coral bleaching and mortality, leading to reef decline, have been mainly associated with climate-change-driven increases in sea surface temperature. However, mortality events also related decreases temperature, cold stress (e.g. La Niña events) being expected increase frequency or intensity as a result of changing climate. Cold creates physiological symptoms symbiotic reef-building corals similar those observed when they are heat stressed, the biochemical mechanisms underpinning suggested be an oxidative condition. up now, this hypothesis had not tested. This study assessed how short long excursions seawater temperature affect physiology processes Stylophora pistillata We provide, for first time, direct evidence that production reactive oxygen species, rapid expulsion significant proportion symbiont population by host during cooling conditions is acclimation mechanism avoid and, ultimately, severe bleaching. Furthermore, one show upwelling (short-term stress+nutrient enrichment) can provoke more condition than alone.

Language: Английский

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Application of remotely sensed sea surface temperature for assessment of recurrent coral bleaching (2014–2019) impact on a marginal coral ecosystem

Geocarto International, Journal Year: 2021, Volume and Issue: 37(15), P. 4483 - 4508

Published: Feb. 12, 2021

The 2014–2016 El Niño Southern Oscillation (ENSO) caused a prolonged marine heatwave that led to widespread coral bleaching and mortality across the Indo-pacific reefs. Prediction of assessment impact on corals is vital for reef ecosystem functioning, services management. Wherein, advanced satellite remote sensing approach determine quantify thermal stress can assist as an alternative convenient tool monitoring programs. present study examines consecutive episodes shallow-water marginalized patch ecosystems Eastern Arabian Sea. Advanced Very High-Resolution Radiometer (AVHRR) data from NOAA Coral Reef Watch's (NOAA-CRW) platform, known CoralTemp, were used analyze indices like Bleaching Threshold (BT), Positive Anomaly (PA), Degree Heating Weeks (DHW) calculated. Ground-truthing revealed detected satellite-derived Sea Surface Temperature (SST) over this region well corroborate with mass events, found reliable detecting in turbid habitats. This signifies potential benefit incorporating sensed SST program, which may guide undertake targeted surveys aid decision-making conservation vulnerable ecosystems.

Language: Английский

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Coral responses to climate change exposure

Environmental Research Letters, Journal Year: 2022, Volume and Issue: 17(7), P. 073001 - 073001

Published: May 30, 2022

Abstract A brief historical narrative of coral responses to climate change exposures is followed by a review evidence. I trace the history investigations and summarize findings from 112 multiple-site field studies that examined environmental exposure variables bleaching mortality response relationships. total 59 in six topic areas were studied which excess thermal was most common variable. Investigations broadly classified into two categories; those focused on either stress thresholds (TM) or continuous (VM). The TM considered 28 variables, but only 1.7 ± 1.3 (SD) per publication, 11% completed variable selection process competed for fit parsimony. 65 VM publications more publication (4.1 4.3), 43% procedure. received citation frequently used identify future impacts sanctuaries. often report heat threshold as weak single predictors mortality. Coral favors mechanisms causation are additive interactive; specifically, interactions between chronic acute stresses within geographic habitat contexts local genetic histories. Some potentially important predicting have seldom been modeled. implication status health reefs will be better than predicted TMs. Moreover, sanctuaries expected patchy influenced space, time, genetics, taxa heterogeneity reflect mix avoidance, resistance, recovery processes their associated sanctuary locations.

Language: Английский

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Changes in Benthic Habitat Under Climate Pressure in Western Papua, Indonesia: Remote Sensing-Based Approach

Journal of the Indian Society of Remote Sensing, Journal Year: 2024, Volume and Issue: 52(2), P. 291 - 304

Published: Feb. 1, 2024

Language: Английский

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