Impacts of Climate Change on New Zealand Fisheries and Aquaculture

Pinkerton, Matthew H.

doi:10.1002/9781119154051.ch5

Cited by 14 publications

(14 citation statements)

References 92 publications

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“…Due to the small land mass and the large area of surrounding ocean, New Zealand's terrestrial climate is largely influenced by the surrounding ocean temperatures (Sutton et al 2005;Bowen et al 2017). The changing ocean physical environment impacts marine ecosystems with subsequent effects on fisheries and aquaculture (e.g Schiel 2013;Schiel et al 2016;Law et al 2017;Pinkerton 2017). The IPCC 5th assessment stated with high agreement that 'climate change is a risk to the sustainability of capture fisheries and aquaculture development' and with high confidence that 'Global warming will result in more frequent extreme events and greater associated risks to ocean ecosystems' (Hoegh-Guldberg et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Ocean temperature change around New Zealand over the last 36 years

Sutton

Bowen

2019

New Zealand Journal of Marine and Freshwater Research

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Ocean temperature changes around New Zealand are estimated from satellite sea surface temperature (SST) products since 1981, two high resolution expendable bathythermograph transects (HRXBT) since 1986 and 1991, and Argo data since 2006. The datasets agree well where they overlap. Significant surface warming is found in subtropical waters. Greatest warming is east of Australia and in the central Pacific. All NZ coastal waters are warming, with strongest warming east of Wairarapa and weakest between East Cape and North Cape. Temperature changes are surface intensified, extending to ∼200 m in the northeast and at least 850 m in the eastern Tasman. Significant interannual variability is coherent over a large area of ocean north of the Subtropical Front and modulates extreme events. NZ air temperatures are highly correlated at interannual timescales with SSTs over a broad region of ocean north of the Subtropical Front from the eastern Tasman to east of the dateline.

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Section: Introductionmentioning

confidence: 99%

Ocean temperature change around New Zealand over the last 36 years

Sutton

Bowen

2019

New Zealand Journal of Marine and Freshwater Research

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“…Along with the increasing scale and prevalence of mariculture worldwide comes an increasing urgency in managing its effects on the marine environment (Soto et al 2007, Filgueira et al 2014. In New Zealand as elsewhere, there is an increasing focus on sustainable, ecosystem-based management of aquaculture , Soto et al 2007, Bostock et al 2010, Pinkerton, 2017a. One of the key environmental issues associated with coastal bivalve mariculture is its potential effect on water quality (Zeldis 2005, Soto et al 2007, Bostock et al 2010, both in terms of the output of material from the farmed spe-cies to the environment (Soto et al 2007) and the depletion of phytoplankton by filter-feeding species (Gall et al 2003, Grant et al 2007.…”

Section: Introductionmentioning

confidence: 99%

Measuring the effects of bivalve mariculture on water quality in northern New Zealand using 15 years of MODIS-Aqua satellite observations

Pinkerton¹,

Gall²,

Wood³

et al. 2018

Aquacult. Environ. Interact.

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This study demonstrates that satellite information can be used to quantify the effect of a large coastal mussel farm on water quality. Our study focussed on a 1400 ha area of maricultured green-lipped mussels Perna canaliculus in the Firth of Thames in northern New Zealand. Observations by NASA's MODIS-Aqua sensor were used to estimate the concentration of chlorophyll a (chl a, as a proxy for phytoplankton), turbidity and sea surface temperature at 500 m resolution. We used approximately 890 single-pass satellite images, each with < 50% cloud cover, spanning 2002 to 2017. For each image, the area over the mussel farm was removed and then filled in using kriging with parameters derived from semivariogram analysis of each individual image using linear and exponential models. Three control areas were used to test whether the differences between the kriged data and the observed data in the farm area were significant. We found that, over the 15 yr of the observation, the farm had a significant effect on chl a of −1.6% (reduction) averaged over an area of 1.5 times the area of the farm itself. No significant effect of the farm on turbidity was detected. The farm caused a seasonal pattern of winter warming (+ 0.03°C) and summer cooling (−0.11°C). The method described here could potentially be applied to other satellite data and other large (multi-kilometre) mariculture facilities to observe their effects on water quality.

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“…The Campbell Plateau oceanography not only influences New Zealand weather (e.g. Hopkins et al 2010) but it is also important for fisheries and marine mammal populations (Pinkerton 2017;Sutton and Bowen 2019). New Zealand is already experiencing extreme events such as the 2017/2018 heatwave with sea surface temperatures anomalies in the eastern Tasman Sea of more than 3.7°C (Salinger et al 2019) and severe weather events that might be more intense in a warming climate scenario (Behrens et al 2019).…”

Section: Are Water Masses Formed Locally On the Plateau?mentioning

confidence: 99%

Frontal dynamics and water mass variability on the Campbell Plateau

Forcén-Vázquez

Williams

Bowen

et al. 2021

New Zealand Journal of Marine and Freshwater Research

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The Campbell Plateau is a dominating bathymetric feature of New Zealand's subantarctic region, strongly influencing the dynamics of both the Subtropical Front (STF) to the north and the Subantarctic Front (SAF) to the south. We present a consistent survey across New Zealand's subantarctic of the relationships between front positions, bathymetry and water masses. The northwest side of the Campbell Plateau is comparatively warm due to a southward extension of the STF over the plateau. The SAF is steered south and east by the combined effect of the plateau and Macquarie Ridge, with waters originating in the SAF also found north of the plateau. Formation of Subantarctic Mode Water (SAMW) is confirmed, with a deep reservoir of SAMW persisting nearly a year after formation. Antarctic Intermediate Water (AAIW) is observed around the edges of the plateau, but not present on the plateau, confirming that the waters on the plateau are isolated from deeper Southern Ocean.

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Impacts of Climate Change on New Zealand Fisheries and Aquaculture

Cited by 14 publications

References 92 publications

Ocean temperature change around New Zealand over the last 36 years

Ocean temperature change around New Zealand over the last 36 years

Measuring the effects of bivalve mariculture on water quality in northern New Zealand using 15 years of MODIS-Aqua satellite observations

Frontal dynamics and water mass variability on the Campbell Plateau

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