A Global Estimate of the Number of Coral Reef Fishers

Teh, Louise; Teh, Lydia C. L.; Sumaila, U. Rashid

doi:10.1371/journal.pone.0065397

Cited by 177 publications

(146 citation statements)

References 37 publications

(46 reference statements)

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“…in the fishery and tourism sector (Cinner et al, 2016). Teh et al (2013) estimate that about 25 % of the world's small-scale fishers fish on coral reefs. Chen et al (2015) report that a loss of less than 60 % of global coral reef coverage, that could very well be reached already in the 2030s, would inflict damages of more than USD 20 billion annually.…”

Section: Resultsmentioning

confidence: 99%

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C

et al. 2016

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Abstract. Robust appraisals of climate impacts at different levels of global-mean temperature increase are vital to guide assessments of dangerous anthropogenic interference with the climate system. The 2015 Paris Agreement includes a two-headed temperature goal: "holding the increase in the global average temperature to well below 2 • C above pre-industrial levels and pursuing efforts to limit the temperature increase to 1.5 • C". Despite the prominence of these two temperature limits, a comprehensive overview of the differences in climate impacts at these levels is still missing. Here we provide an assessment of key impacts of climate change at warming levels of 1.5 • C and 2 • C, including extreme weather events, water availability, agricultural yields, sea-level rise and risk of coral reef loss. Our results reveal substantial differences in impacts between a 1.5 • C and 2 • C warming that are highly relevant for the assessment of dangerous anthropogenic interference with the climate system. For heat-related extremes, the additional 0.5 • C increase in global-mean temperature marks the difference between events at the upper limit of present-day natural variability and a new climate regime, particularly in tropical regions. Similarly, this warming difference is likely to be decisive for the future of tropical coral reefs. In a scenario with an end-of-century warming of 2 • C, virtually all tropical coral reefs are projected to be at risk of severe degradation due to temperature-induced bleaching from 2050 onwards. This fraction is reduced to about 90 % in 2050 and projected to decline to 70 % by 2100 for a 1.5 • C scenario. Analyses of precipitation-related impacts reveal distinct regional differences and hot-spots of change emerge. Regional reduction in median water availability for the Mediterranean is found to nearly double from 9 % to 17 % between 1.5 • C and 2 • C, and the projected lengthening of regional dry spells increases from 7 to 11 %. Projections for agricultural yields differ between crop types as well as world regions. While some (in particular high-latitude) regions may benefit, tropical regions like West Africa, South-East Asia, as well as Central and northern South America are projected to face substantial local yield reductions, particularly for wheat and maize. Best estimate sea-level rise projections based on two illustrative scenarios indicate a 50 cm rise by 2100 relative to year 2000-levels for a 2 • C scenario, and about 10 cm lower levels for a 1.5 • C scenario. In a 1.5 • C scenario, the rate of sea-level rise in 2100 would be reduced by about 30 % compared to a 2 • C scenario. Our findings highlight the importance of regional differentiation to assess both future climate risks and different vulnerabilities to incremental increases in globalmean temperature. The article provides a consistent and comprehensive assessment of existing projections andPublished by Copernicus Publications on behalf of the European Geosciences Union. 328C.-F. Schleussner et al.: Climate impacts at 1.5 • C a...

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Section: Resultsmentioning

confidence: 99%

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C

et al. 2016

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“…was not reported separately in the database. We identified 200 reef fish species and taxon groups in the SAUP catch database 47 . Note that reef-associated pelagics such as scombrids and carangids normally form part of reef fish catches.…”

Section: Gravity Computationmentioning

confidence: 99%

Bright spots among the world’s coral reefs

Cinner

Huchery

MacNeil

et al. 2016

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“…52 In the tropics, coral reef fisheries support >6 million reef fishers in over 100 countries, providing 53 critical and diverse values, including food, income, livelihoods, and cultural significance (Teh, 54 Teh & Sumaila, 2013). Nowhere are coral reef fisheries more important than in the developing 55 economies and communities in the Pacific (Dalzell, 1996;Gillett, 2016).…”

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confidence: 99%

Patterns in artisanal coral reef fisheries reveal best practices for monitoring and management

Delaney

Teneva

Stamoulis

et al. 2017

Preprint

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Sustainable fisheries management is key to restoring and maintaining ecological function and benefits to people, but it requires accurate information about patterns in resource use, particularly fishing pressure. In most coral reef fisheries and other data-poor contexts, obtaining such information is challenging and remains an impediment to effective management. We developed the most comprehensive regional view of shore-based fishing effort and catch for the Hawaiian Islands to show detailed fishing patterns from across the main Hawaiian Islands (MHI). We reveal these regional patterns through fisher "creel" surveys conducted through collaborative efforts by local communities, state agencies, academics, and environmental organizations, at 18 sites and comprising >10,000 hr of monitoring across a range of habitats and human influences throughout the MHI. Here, we document spatial patterns in nearshore fisheries catch, effort, catch rates (i.e., catch-perunit-effort [CPUE]), and catch disposition (i.e., use of fish after catch is landed). Line fishing was consistently the most commonly employed gear type (94%), followed by net fishing.The most efficient gear types (i.e., higher CPUE) were spear (0.64 kg hr -1 ), followed closely by net (0.61 kg hr -1 ), with CPUE for line (0.16 kg hr -1 ) 3.9 times lower than spear and 3.7 times lower than net. Creel surveys also reveal rampant illegal fishing activity across the studied locations. Surprisingly, overall, most of the catch was not sold, but rather retained for home consumption or given away to extended family, which indicates that cultural and food security may be stronger drivers of fishing effort than commercial exploitation for nearshore coral reef fisheries in Hawai'i. Increased monitoring of spatial patterns in nearshore fisheries can inform targeted management, in order to maintain these fisheries for local communities' food security, cultural, and ecological value. Sustainable fisheries management is key to restoring and maintaining ecological function 28 and benefits to people, but it requires accurate information about patterns in resource use, 29 particularly fishing pressure. In most coral reef fisheries and other data-poor contexts, obtaining 30 such information is challenging and remains an impediment to effective management. We 31 developed the most comprehensive regional view of shore-based fishing effort and catch for the 32 Hawaiian Islands to show detailed fishing patterns from across the main Hawaiian Islands 33 (MHI). We reveal these regional patterns through fisher "creel" surveys conducted through 34 collaborative efforts by local communities, state agencies, academics, and environmental 35 organizations, at 18 sites and comprising >10,000 hr of monitoring across a range of habitats and 36 human influences throughout the MHI. Here, we document spatial patterns in nearshore fisheries 37 catch, effort, catch rates (i.e., catch-per-unit-effort [CPUE]), and catch disposition (i.e., use of 38 fish after catch is landed). Line fishing was consistent...

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A Global Estimate of the Number of Coral Reef Fishers

Cited by 177 publications

References 37 publications

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C

Bright spots among the world’s coral reefs

Patterns in artisanal coral reef fisheries reveal best practices for monitoring and management

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A Global Estimate of the Number of Coral Reef Fishers

Cited by 177 publications

References 37 publications

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C

Bright spots among the world’s coral reefs

Patterns in artisanal coral reef fisheries reveal best practices for monitoring and management

Contact Info

Product

Resources

About

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C

Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C