10.5061/DRYAD.9J346
Krumhansl, Kira A.
Simon Fraser University
Bergman, Jordanna N.
Simon Fraser University
Salomon, Anne K.
Simon Fraser University
Data from: Assessing the ecosystem-level consequences of a small-scale
artisanal kelp fishery within the context of climate-change
Dryad
dataset
2016
harvest
Macrocystis pyrifera
Pterygophora californica
Saccharina groenlandica
2014-2015
Saccharina latissima
kelp
2016-12-08T16:49:04Z
2016-12-08T16:49:04Z
en
https://doi.org/10.1002/eap.1484
80007 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Coastal communities worldwide rely on small-scale artisanal fisheries as a
means of increasing food security and alleviating poverty. Even
small-scale fishing activities, however, are prone to resource depletion
and environmental degradation, which can erode livelihoods in the long
run. Thus, there is a pressing need to identify viable and resilient
artisanal fisheries, and generate knowledge to support management within
the context of a rapidly changing climate. We examined the ecosystem-level
consequences of an artisanal kelp fishery (Macrocystis pyrifera), finding
minimal impacts of small-scale harvest on kelp recovery rates, survival,
and biomass dynamics, and abundances of associated commercial and
culturally important fish species. These results suggest that small-scale
harvest poses minimal trade-offs for the other economic benefits provided
by these ecosystems, and their inherent, spiritual, and cultural value to
humans. However, we detected a negative impact of warmer seawater
temperatures on kelp recovery rates following harvest, indicating that the
viability of harvest, even at small scales, may be threatened by future
increases in global ocean temperature. This suggests that negative impacts
of artisanal fisheries may be more likely to arise in the context of a
warming climate, further highlighting the widespread effects of global
climate change on coastal fisheries and livelihoods.
Harvest_2014Data associated with the 2014 harvest experiment, where
Macrocystis canopies were harvested at 5 sites along the coast of British
Columbia. Data shown are metrics of kelp recovery (growth, biomass
recovered, surface frond production, and surface frond loss) for kelps at
each site. Also shown are the percentage of reproductive sporophylls at
each site. Data set also includes predictor variables (wave exposure,
average temperature, max temperature, standard deviation of temperature,
frond and plant density at the site, and metrics of individual kelp size
[surface length before harvest, the number of fronds at the surface before
harvest, and the biomass removed).Harv_2015_macro_plotData for harvest
plots prior (Interval 1), 24 hours (Interval 2) and 3 weeks (Interval 3)
post harvest. Data include M. pyrifera frond density, plant density, and
biomass density. Also shown are the harvest rates for each plot (% canopy
removal).Harv_2015_macro_rateGrowth, frond loss, and change in biomass for
M. pyrifera from prior to harvest to three weeks post harvest for each
harvest plot. Also shown are harvest rates (% canopy
removal).Harvest_2015_understoryUnderstory kelp density and biomass in
harvest plots.Harvest_2015_fishFish abundance data in kelp harvest plots
prior to harvest, 24 hours, and 3 weeks post harvest.
British Columbia