Assessment of control methods for the invasive seaweed Sargassum horneri in California, USA

Marks, Lindsay M.; Reed, Daniel A.; Obaza, Adam

doi:10.3391/mbi.2017.8.2.08

Cited by 26 publications

(29 citation statements)

References 1 publication

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“…The type of technique applied depends on the management objective (i.e., eradication or control) and is often site and species specific ( Anderson, 2007 ). Examples include chemical treatments (i.e., bleach, salt), thermal treatments (i.e., cold shock, heating), osmotic shock (i.e., freshwater and salinity treatments) ( Cheshire et al, 2002 ; Williams & Smith, 2004 ; Wotton & Hewitt, 2004 ; Glasby, Cresse & Gibson, 2005 ; Anderson, 2007 ), mechanical or manual removal by hand and/or aided by vacuum or dredge pumps ( Curiel et al, 2001 ; Miller et al, 2004 ; Hewitt et al, 2005 ; Conklin, 2007 ; Marks, Reed & Obaza, 2017 ), light attenuation, containment barriers, and water-removal with in situ desiccation ( Anderson, 2007 ).…”

Section: Introductionmentioning

confidence: 99%

Herbivore biocontrol and manual removal successfully reduce invasive macroalgae on coral reefs

Neilson¹,

Wall

Mancini

et al. 2018

PeerJ

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Invasive macroalgae pose a serious threat to coral reef biodiversity by monopolizing reef habitats, competing with native species, and directly overgrowing, and smothering reef corals. Several invasive macroalgae (Eucheuma clade E, Kappaphycus clade A and B, Gracilaria salicornia, and Acanthophora spicifera) are established within Kāne‘ohe Bay (O‘ahu, Hawai‘i, USA), and reducing invasive macroalgae cover is a coral reef conservation and management priority. Invasive macroalgae control techniques, however, are limited and few successful large-scale applications exist. Therefore, a two-tiered invasive macroalgae control approach was designed, where first, divers manually remove invasive macroalgae (Eucheuma and Kappaphycus) aided by an underwater vacuum system (“The Super Sucker”). Second, hatchery-raised juvenile sea urchins (Tripneustes gratilla), were outplanted to graze and control invasive macroalgae regrowth. To test the effectiveness of this approach in a natural reef ecosystem, four discrete patch reefs with high invasive macroalgae cover (15–26%) were selected, and macroalgae removal plus urchin biocontrol (treatment reefs, n = 2), or no treatment (control reefs, n = 2), was applied at the patch reef-scale. In applying the invasive macroalgae treatment, the control effort manually removed ∼19,000 kg of invasive macroalgae and ∼99,000 juvenile sea urchins were outplanted across to two patch reefs, totaling ∼24,000 m2 of reef area. Changes in benthic cover were monitored over 2 years (five sampling periods) before-and-after the treatment was applied. Over the study period, removal and biocontrol reduced invasive macroalgae cover by 85% at treatment reefs. Our results show manual removal in combination with hatchery raised urchin biocontrol to be an effective management approach in controlling invasive macroalgae at reef-wide spatial scales and temporal scales of months to years.

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Section: Introductionmentioning

confidence: 99%

Herbivore biocontrol and manual removal successfully reduce invasive macroalgae on coral reefs

Neilson¹,

Wall

Mancini

et al. 2018

PeerJ

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“…In New Zealand, incursion responses and ongoing management of the Mediterranean fanworm (Sabella spallanzanii) have cost in excess of NZ$ 2 million (Bell et al, 2011). More recently, Marks et al (2017) evaluated the removal of the introduced fucoid Sargassum horneri offshore of Santa Catalina Island (California, United States) and found that successful acute population size reductions were overwhelmed by subsequent recruitment.…”

Section: Introductionmentioning

confidence: 99%

Vessel In-Water Cleaning or Treatment: Identification of Environmental Risks and Science Needs for Evidence-Based Decision Making

Scianni¹,

Georgiades

2019

Front. Mar. Sci.

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The accumulation of aquatic organisms on the wetted surfaces of vessels (i.e., vessel biofouling) negatively impacts worldwide shipping through reductions in vessel performance and fuel efficiency, and increases in emissions. Vessel biofouling is also a potent mechanism for the introduction and spread of marine non-indigenous species. Guidance and regulations from the International Maritime Organization, New Zealand, and California have recently been adopted to address biosecurity risks, primarily through preventive management. However, appropriate reactive management measures may be necessary for some vessels. Vessel in-water cleaning or treatment (VICT) has been identified as an important tool to improve operating efficiency and to reduce biosecurity risks. VICT can be applied proactively [i.e., to prevent the occurrence of, or to remove, microfouling (i.e., slime) or prevent the occurrence of macrofouling organismslarge, distinct multicellular organisms visible to the human eye], or reactively (i.e., to remove macrofouling organisms). However, unmanaged VICT includes its own set of biosecurity and water quality risks. Regulatory policies and technical advice from California and New Zealand have been developed to manage these risks, but there are still knowledge gaps related to the efficacy of available technologies. Research efforts are underway to address these gaps in order to inform the regulatory and non-regulatory application of VICT.

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“…The utility of several existing control methods on notorious invasive species are also evaluated in the papers by Marks et al (2017), Davidson et al 2017and Duncombe and Therriault (2017). These papers investigate the assessment of manual removal versus using a suction device for removal of the invasive New management platforms such as the Canadian Marine Invasive Screening Tool (CMIST) are presented and its efficacy evaluated in Drolet et al (2017).…”

mentioning

confidence: 99%

Reproductive biology of an invasive population of European green crab, Carcinus maenas, in Placentia Bay, Newfoundland

Best¹,

McKenzie²,

Couturier³

2017

MBI

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Assessment of control methods for the invasive seaweed Sargassum horneri in California, USA

Cited by 26 publications

References 1 publication

Herbivore biocontrol and manual removal successfully reduce invasive macroalgae on coral reefs

Herbivore biocontrol and manual removal successfully reduce invasive macroalgae on coral reefs

Vessel In-Water Cleaning or Treatment: Identification of Environmental Risks and Science Needs for Evidence-Based Decision Making

Reproductive biology of an invasive population of European green crab, Carcinus maenas, in Placentia Bay, Newfoundland

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