Rapid assessment of an ocean warming hotspot reveals “high” confidence in potential species’ range extensions

Robinson, Lynn; Gledhill, Daniel C.; Moltschaniwskyj, Natalie A.; Hobday, Alistair J.; Frusher, Stewart; Barrett, Neville S.; Stuart-Smith, JF; Pecl, Gretta T.

doi:10.1016/j.gloenvcha.2014.12.003

Cited by 92 publications

(96 citation statements)

References 38 publications

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“…The warm temperatures were also associated with out-of-range observations of several fish species, including yellowtail kingfish, snapper, dusky morwong, mahi mahi, blue moki and moonlighter fish, which may have been carried southward by the anomalously strong East Australian Current Extension. Although these species have been occasionally found in Tasmanian waters5960, the number of species and sightings were higher than in recent years. Recreational fishers were particularly excited by the presence of kingfish and mahi mahi6162, indicating that some impacts are viewed as positive outcomes.…”

Section: Resultsmentioning

confidence: 66%

The unprecedented 2015/16 Tasman Sea marine heatwave

et al. 2017

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The Tasman Sea off southeast Australia exhibited its longest and most intense marine heatwave ever recorded in 2015/16. Here we report on several inter-related aspects of this event: observed characteristics, physical drivers, ecological impacts and the role of climate change. This marine heatwave lasted for 251 days reaching a maximum intensity of 2.9 °C above climatology. The anomalous warming is dominated by anomalous convergence of heat linked to the southward flowing East Australian Current. Ecosystem impacts range from new disease outbreaks in farmed shellfish, mortality of wild molluscs and out-of-range species observations. Global climate models indicate it is very likely to be that the occurrence of an extreme warming event of this duration or intensity in this region is respectively ≥330 times and ≥6.8 times as likely to be due to the influence of anthropogenic climate change. Climate projections indicate that event likelihoods will increase in the future, due to increasing anthropogenic influences.

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Section: Resultsmentioning

confidence: 66%

The unprecedented 2015/16 Tasman Sea marine heatwave

et al. 2017

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“…tropicalisation) into previously cooler environments (Wernberg et al 2013b;Vergés et al 2014;Bennett et al 2015a). Observed changes include expansion of a subtidal sea urchin (Ling et al 2009), a range of intertidal invertebrates (Pitt et al 2010), zooplankton (Johnson et al 2011), and coastal fishes (Johnson et al 2011;Last et al 2011;Bennett et al 2015a;Robinson et al 2015). In the case of the sea urchin (Centrostephanus rodgersii) in the south-eastern GSR, range extension and population expansion has led to overgrazing of kelp forests, resulting in barren formation and reduced fisheries productivity (Johnson et al 2011).…”

Section: Status and Threatsmentioning

confidence: 99%

The 'Great Southern Reef': social, ecological and economic value of Australia's neglected kelp forests

Bennett¹,

Wernberg²,

Connell³

et al. 2016

Mar. Freshwater Res.

322

229

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Abstract. Kelp forests define .8000 km of temperate coastline across southern Australia, where ,70% of Australians live, work and recreate. Despite this, public and political awareness of the scale and significance of this marine ecosystem is low, and research investment miniscule (,10%), relative to comparable ecosystems. The absence of an identity for Australia's temperate reefs as an entity has probably contributed to the current lack of appreciation of this system, which is at odds with its profound ecological, social and economic importance. We define the 'Great Southern Reef' (GSR) as Australia's spatially connected temperate reef system. The GSR covers ,71 000 km 2 and represents a global biodiversity hotspot across at least nine phyla. GSR-related fishing and tourism generates at least AU$10 billion year À1, and in this context the GSR is a significant natural asset for Australia and globally. Maintaining the health and ecological functioning of the GSR is critical to the continued sustainability of human livelihoods and wellbeing derived from it. By recognising the GSR as an entity we seek to boost awareness, and take steps towards negotiating the difficult challenges the GSR faces in a future of unprecedented coastal population growth and global change.

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“…Angler apps can also promote the collection of secondary and novel information such as (i) bait and tackle, depth, ice thickness, lunar phase and weather conditions; (ii) fish kills, invasive species, injuries, tags, pollution or water conditions (e.g. Robinson et al 2015), infer changes in abundance from trophy catches (Richardson et al 2006), or use catch data to determine harvest rates in relation to angling tactics or (a)biotic factors (e.g. the health benefits of fly fishing from a kayak versus trolling with an engine).…”

Section: Opportunitiesmentioning

confidence: 99%

Angler apps as a source of recreational fisheries data: opportunities, challenges and proposed standards

2016

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Recreational fisheries surveys are limited in time and place in many countries. This lack of data limits scientific understanding and sustainable management. Smartphone applications (apps) allow anglers to record the details of their fishing trips and catches. In this study, we describe the opportunities and challenges associated with angler apps as a source of recreational fisheries data, and propose minimum standards for data collection via angler apps. Angler apps are a potentially valuable source of conventional and novel data that are both frequent and extensive, and an opportunity to engage anglers through data sharing and citizen science. Realizing this potential requires that we address significant challenges related to angler recruitment and retention, data quality and bias, and integration with existing fisheries programmes. We propose solutions to each of these challenges. Given that the angler app market is diverse, competitive and unpredictable, we emphasize minimum standards for data collection as a way to ensure large and reliable data sets that can be compared and integrated across apps. These standards relate to trips and catches, and angler demographics and behaviour, and should be supported through consultation and research. Angler apps have the potential to fundamentally change how anglers interact with the resource and with management.

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Rapid assessment of an ocean warming hotspot reveals “high” confidence in potential species’ range extensions

Cited by 92 publications

References 38 publications

The unprecedented 2015/16 Tasman Sea marine heatwave

The unprecedented 2015/16 Tasman Sea marine heatwave

The 'Great Southern Reef': social, ecological and economic value of Australia's neglected kelp forests

Angler apps as a source of recreational fisheries data: opportunities, challenges and proposed standards

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