Risk assessment of small‐scale reef fisheries off the Abrolhos Bank: Snappers and groupers under a multidimensional evaluation

Previero, Marília; Gasalla, Maria A.

doi:10.1111/fme.12406

Cited by 14 publications

(3 citation statements)

References 69 publications

(83 reference statements)

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“…Worldwide, rat eradication is the most effective management strategy on islands to restore seabird populations and their effects on land and water (Benkwitt et al, 2021; Jones et al, 2016). Since the Abrolhos region protects one of the largest and most diverse coral reefs in the South Atlantic (Leão & Kikuchi, 2001) and it is under strong external pressures, such as contamination from mining (Nunes et al, 2022) and predatory fishing (Giglio et al, 2020; Previero & Gasalla, 2020), management actions within the archipelago to eradicate rats and goats can be important to guarantee the protection of seabirds and their ecosystem‐wide ecological effects.…”

Section: Discussionmentioning

confidence: 99%

Seabirds subsidize terrestrial food webs and coral reefs in a tropical rat‐invaded archipelago

Linhares

Bugoni

2022

Ecological Applications

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Allochthonous resource fluxes mediated by organisms crossing ecosystem boundaries may be essential for supporting the structure and function of resource‐limited environments, such as tropical islands and surrounding coral reefs. However, invasive species, such as black rats, thrive on tropical islands and disrupt the natural pathways of nutrient subsidies by reducing seabird colonies. Here, we used stable isotopes of nitrogen and carbon to examine the role of seabirds in subsidizing the terrestrial food webs and adjacent coral reefs in the Abrolhos Archipelago, Southwest Atlantic Ocean. By sampling invasive rats and multiple ecosystem compartments (soil, plants, grasshoppers, tarantulas, and lizards) within and outside seabird colonies, we showed that seabird subsidies led to an overall enrichment in 15N across the food web on islands. However, contrary to other studies, δ15N values were consistently lower within the seabird colonies, suggesting that a higher seabird presence might produce a localized depletion in 15N in small islands influenced by seabirds. In contrast, the nitrogen content (%N) in plants and soils was higher inside the colonies, corresponding to a higher effect of seabirds at the base of the trophic web. Among consumers, lizards and invasive rats seemed to obtain allochthonous resources from subsidized terrestrial organisms outside the colony. Inside the colony, however, they showed a more direct consumption of marine matter, suggesting that subsidies benefit these native and invasive animals both directly and indirectly. Nonetheless, in coral reefs, scleractinian corals assimilated seabird‐derived nitrogen only around the two smaller and lower‐elevation islands, as demonstrated by the substantially higher δ15N values in relation to the reference areas. This provides evidence that island morphology may influence the incorporation of seabird nutrients in coral reefs around rat‐invaded islands, likely because guano lixiviation toward seawater is facilitated in small and low‐elevation terrains. Overall, these results showed that seabirds affected small islands across all trophic levels within and outside colonies and that these effects spread outward to coral reefs, evidencing resiliency of seabird subsidies even within a rat‐invaded archipelago. Because rats are consumers of seabird chicks and eggs, however, rat eradication could potentially benefit the terrestrial and nearshore ecosystems through increased subsides carried by seabirds.

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Section: Discussionmentioning

confidence: 99%

Seabirds subsidize terrestrial food webs and coral reefs in a tropical rat‐invaded archipelago

Linhares

Bugoni

2022

Ecological Applications

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“…Generally, the greater the distance function, the better the clustering results. Formula (1) is the expression of the K-Means algorithm, and Figure 2 is the model of the algorithm [5][6][7].…”

Section: Common Classification Algorithm Decision Tree Support Vector...mentioning

confidence: 99%

Research on comprehensive evaluation of government economic management performance based on multidimensional data mining

2023

socsam

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The comprehensive evaluation of government economic management performance is of great help to the planning of government economic activities. However, a large amount of data is involved in the comprehensive evaluation, and the data has multidimensional characteristics, so it is suggested to use multidimensional data mining to help the evaluation. This paper first introduces the basic concept of multidimensional data mining technology, and then analyzes the practical application of this technology, hoping to provide reference help.

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“…Hornborg et al [23] used the PSA method to assess the potential vulnerability of marine fishing communities in Skagerrak-Kattegat (eastern North Sea). Previero et al [24] combined the PSA method with scale-intensity consequence analysis (SICA) to evaluate the potential impacts, risks, and vulnerability of coral reef fisheries in biological, environmental, social, and economic terms. In terms of the influencing factors, marine fisheries vulnerability studies have shifted from single to multiple factors.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Marine Fisheries Vulnerability in China and Its Spatial Effects: Evidence from Coastal Regions

2022

Agriculture

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Based on data from 10 coastal regions in China, this study establishes an evaluation index system for marine fisheries using the theoretical framework of the DPSR model. The entropy method is used to calculate the degree of marine fisheries vulnerability in each region of China from 2009 to 2018. The spatial Durbin model (SDM) is also used to analyze the influencing factors and spatial spillover effects of marine fisheries vulnerability from four perspectives of economic efficiency, industrial structure, environmental regulation, and ecological pollution. The results show significant positive direct effects between the economic efficiency, ecological pollution, and vulnerability of marine fisheries. At the same time, there are significant negative effects between the industrial structure, environmental regulation, and vulnerability of marine fisheries. In terms of spatial spillover effects, economic efficiency, environmental regulation, and ecological pollution show positive spatial spillover effects, while the industrial structure shows negative spatial spillover effects. These findings provide a theoretical basis for the sustainable development of marine fisheries in China.

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Risk assessment of small‐scale reef fisheries off the Abrolhos Bank: Snappers and groupers under a multidimensional evaluation

Cited by 14 publications

References 69 publications

Seabirds subsidize terrestrial food webs and coral reefs in a tropical rat‐invaded archipelago

Seabirds subsidize terrestrial food webs and coral reefs in a tropical rat‐invaded archipelago

Research on comprehensive evaluation of government economic management performance based on multidimensional data mining

Evaluation of Marine Fisheries Vulnerability in China and Its Spatial Effects: Evidence from Coastal Regions

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