Authors’ Response

Hijmans, W.; Dequeker, J.

doi:10.1177/014107680509800229

Cited by 65 publications

(74 citation statements)

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“…the fraction of cells in which the species is present; Phillips et al, 2009). We set the known farm locations' HSI as 'presence' and the locations with suitable HSI but no farms as 'absence' and evaluated 'prevalence' using the evaluate function in the R dismo package (Hijmans, Phillips, Leathwick, Elith, & Hijmans, 2017). The predictive values of habitat suitability for mariculture below the prevalence value were assigned 0 and predicted HSI values higher than the prevalence value were assigned 1.…”

Section: Present Suitable Areas For Mariculturementioning

confidence: 99%

Projecting global mariculture diversity under climate change

Oyinlola

Reygondeau

Wabnitz

et al. 2020

Global Change Biology

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Previous studies have focused on changes in the geographical distribution of terrestrial biomes and species targeted by marine capture fisheries due to climate change impacts. Given mariculture's substantial contribution to global seafood production and its growing significance in recent decades, it is essential to evaluate the effects of climate change on mariculture and their socio‐economic consequences. Here, we projected climate change impacts on the marine aquaculture diversity for 85 of the currently most commonly farmed fish and invertebrate species in the world's coastal and/or open ocean areas. Results of ensemble projections from three Earth system models and three species distribution models show that climate change may lead to a substantial redistribution of mariculture species richness potential, with an average of 10%–40% decline in the number of species being potentially suitable to be farmed in tropical to subtropical regions. In contrast, mariculture species richness potential is projected to increase by about 40% at higher latitudes under the ‘no mitigation policy’ scenario (RCP 8.5) by the mid‐21st century. In Exclusive Economic Zones where mariculture is currently undertaken, we projected an average future decline of 1.3% and 5% in mariculture species richness potential under RCP 2.6 (‘strong mitigation’) and RCP 8.5 scenarios, respectively, by the 2050s relative to the 2000s. Our findings highlight the opportunities and challenges for climate adaptation in the mariculture sector through the redistribution of farmed species and expansion of mariculture locations. Our results can help inform adaptation planning and governance mechanisms to minimize local environmental impacts and potential conflicts with other marine and coastal sectors in the future.

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Section: Present Suitable Areas For Mariculturementioning

confidence: 99%

Projecting global mariculture diversity under climate change

Oyinlola

Reygondeau

Wabnitz

et al. 2020

Global Change Biology

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“…For every plot record in the AVD and every grid cell from the CDH raster layers, we assigned bioclimatic conditions based on the standard 19 bioclimatic variables (BIO1 to BIO19) described in the WorldClim archive (< www.worldclim.org >, Hijmans et al 2008). At the global extent, these were extracted from WorldClim at a spatial resolution of 2.5 arc min, which is about 4.5 × 4.5 km at the equator.…”

Section: Climate Datamentioning

confidence: 99%

Of niches and distributions: range size increases with niche breadth both globally and regionally but regional estimates poorly relate to global estimates

et al. 2018

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The relationship between species' niche breadth (i.e. the range of environmental conditions under which a species can persist) and range size (i.e. the extent of its spatial distribution) has mostly been tested within geographically restricted areas but rarely at the global extent. Here, we not only tested the relationship between range size (derived from species' distribution data) and niche breadth (derived from species' distribution and co-occurrence data) of 1255 plant species at the regional extent of the European Alps, but also at the global extent and across both spatial scales for a subset of 180 species. Using correlation analyses, linear models and variation partitioning, we found that species' realized niche breadth estimated at the regional level is a weak predictor of species' global niche breadth and range size. Against our expectations, distribution-derived niche breadth was a better predictor for species' range size than the co-occurrence-based estimate, which should, theoretically, account for more than the climatically determined niche dimensions. Our findings highlight that studies focusing on the niche breadth vs range size relationship must explicitly consider spatial mismatches that might have confounded and diminished previously reported relationships.

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“…We defined the following habitats: sea (North Sea and Wadden Sea), breakwaters, beach, arable land (including ponds, forest and nature areas) and urban areas. Sea and arable land were defined using GDAM January 2012 European boundaries polygon shapefiles (Hijmans 2012). The beach habitat was based on LGN5 (Landelijke Grondgebruikskartering 5) (Hazeu 2005), which provides information about land use in the Netherlands.…”

Section: Habitat Use and Selection Of Birdsmentioning

confidence: 99%

Individual differences in foraging site fidelity are not related to time‐activity budgets in Herring Gulls

Donk

Shamoun-Baranes

Bouten

et al. 2019

Ibis

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Many populations consist of individuals that differ consistently in their foraging behaviour through resource or foraging site selection. Foraging site fidelity has been reported in several seabird species as a common phenomenon. It is considered especially beneficial in spatially and/or temporally predictable environments in which fidelity is thought to increase energy intake, thereby affecting time‐energy budgets. However, the consequences for activity and energy budget have not been adequately tested. In this paper, we studied the consequences of fine‐scale foraging site fidelity in adult Herring Gulls Larus argentatus in a highly predictable foraging environment with distinct foraging patches. We measured their time‐activity budgets using GPS tracking and tri‐axial acceleration measurements, which also made it possible to estimate energy expenditure. Individual variation in foraging site fidelity was high, some individuals spending most of their time on a single foraging patch and others spending the same amount of time in up to 21 patches. While time and activity budgets differed between individuals, we found no clear relationship with foraging site fidelity. We did find a relationship between the size of the birds and the level of site fidelity; faithful birds tend to have a larger body size. Although differences in foraging time and habitat use between individuals could play a role in the results of the current study, short‐term consequences of variation in foraging site fidelity within a population remain elusive, even when focusing on individuals with a similar foraging specialization (Blue Mussels Mytilus edulis). Studying individuals over multiple years and under varying environmental conditions may provide better insight into the consequences and plasticity of foraging site fidelity.

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Authors’ Response

Cited by 65 publications

References 0 publications

Projecting global mariculture diversity under climate change

Projecting global mariculture diversity under climate change

Of niches and distributions: range size increases with niche breadth both globally and regionally but regional estimates poorly relate to global estimates

Individual differences in foraging site fidelity are not related to time‐activity budgets in Herring Gulls

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