4214 results
Contributors: Ana Miller-ter Kuile, Devyn Orr, An Bui, Rodolfo Dirzo, Maggie Klope, Douglas McCauley, Carina Motta, Hillary Young
Date: 2019-04-26
... Island ecosystems have experienced massive biodiversity loss, and invasive species, in particular rodents, are responsible for much of this loss (~15%). Rodent eradications have led to the recovery of over 100 island vertebrates and their ecological roles. While the focus of most eradication efforts has been vertebrate recovery, rodents are generalists that predominantly eat seeds and fruit. However, there has been limited work on the effects of rodent eradication on plant communities and plant-mediated ecological processes. In this study, we conducted repeated surveys of seed, juvenile, and adult tree abundance and survival in permanent vegetation plots across an islet network (Palmyra Atoll) in the Central Tropical Pacific, before and after the eradication of black rats (Rattus rattus). Our aim was to examine the role of seed predation on tree communities and biomass. We observed an 84% decrease in seed predation of an introduced foundational species (the coconut palm, Cocos nucifera), and a 14-fold increase in juvenile tree biomass in all species following eradication. Juvenile C. nucifera abundance increased 2-5 times more than other tree species, leading to a 10% increase in population growth rate and a 4-fold increase in adult tree biomass accumulation over the next tree generation. We conclude that rodents can have nuanced impacts on island ecosystems, including facilitation of other invasive species and alteration of ecosystem functions such as carbon and nutrient cycling and storage. Future eradication efforts need to incorporate plant responses, since plants can shape post-eradication recovery trajectories. These data include census data from permanent vegetation plots on Palmyra Atoll, data used to determine community biomass from these plots, maps of Palmyra Atoll and the vegetation plot locations, and statistical tests used to determine changes in stages and vital rates for tree species in the permanent vegetation plots.
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Contributors: Jessica Noviello, Zachary Torrano, Kelsi Singer, Alyssa Rhoden
Date: 2019-04-10
... These are the ArcMap files created and reported on in Noviello et al. (submitted here)
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Contributors: Lindsay Beazley, Camille Lirette, Javier Guijarro
Date: 2019-04-10
... A benthic imagery survey was conducted along the Eastern Scotian Slope in June 2018 to collect data in support of a Strategic Program for Ecosystem-Based Research and Advice project to evaluate the effectiveness of the Lophelia Coral Conservation Area and identify new areas of importance for benthic species that may qualify for protection under Fisheries and Oceans Canada’s 2009 Policy for Managing the Impact of Fishing on Sensitive Benthic Areas. Linear video and photographic transects from ~200 to 1000 m depth were collected at 10 stations between the Gully Marine Protected Area and the Lophelia Coral Conservation Area using the video and photographic camera system Campod and the ‘4K Camera’ drop camera system. Here we present a quantitative assessment of the corals and sponges observed at each of these 10 stations. Patterns in distribution by transect and depth are presented, as well as the relationship between coral distribution and groundfish fishing effort. We highlight the importance of the slope outside the canyons for the distribution of corals and sponges, where nearly 25 taxa were recorded between 167 – 970 m depth. Diversity and abundance appeared to show a west-to-east gradient across the study area, being highest on those stations adjacent to the Lophelia Coral Conservation Area. Groundfish fishing activity overlapped the distribution of corals and sponges in some parts of the study area, particularly between 200 and 500 m where the large branching corals Paragorgia arborea and Primnoa resedaeformis were observed, and also suggested that fishing may have taken place within the boundaries of the Lophelia Coral Conservation Area since its implementation in 2004. An extension of the boundaries of this closure may ensure its continued effectiveness and provide protection for the diverse and abundant coral and sponge communities that reside beyond its boundaries.
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Contributors: Karlo Seleš
Date: 2019-04-08
... Abaqus UEL and UMAT subroutines for the phase-field modeling of brittle fracture. The code consists of the 3-layered system of user elements and user material subroutine producing a staggered algorithm with a residual norm based stopping criterion. The elements are 4-node full integration 2D and 8-node full integration 3D linear elements. The implementation files (source code and input files) for some examples published in the associated journal article are given. The files contain detailed explanations and instructions for users. This is an updated version of the dataset. See more info in Version_3-ChangeLog.txt For additional information, suggestions or comments, please contacts us at karlo.seles@fsb.hr
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Contributors: Chunli Dai
Date: 2019-04-03
... These data include the 2-m resolution coastline polylines (54_06_2_2_coast_v1.0), 2-m resolution water probability map (54_06_2_2_prob_v1.0), as well as the map of the total count of repeat images (54_06_2_2_nov_v1.0) for a 50 km by 50 km tile as shown in Fig. 9 in Dai et al. 2019.
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Contributors: Douglas Becker
Date: 2019-03-20
... CSV master data file, R command file, and SHP files
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Contributors: Muriadi Arip
Date: 2019-03-13
... An RT (neighborhood association) boundary base map was developed based on Village Sketch Maps of Indonesia Population Census 2010 for 21 villages surrounding Sebubus Forest in West Kalimantan, Indonesia.
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Contributors: feng 65897
Date: 2019-03-05
... The data provided include partial source data, interpretation results of dykes and fractures, partial test images and their processing results.
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Contributors: Rangesh Jagannathan, Craig Johansen, William Hinman
Date: 2019-03-02
... Boundary conditions, coarse grid files and solver setup data for gas-particle flow simulations for a mixed compression supersonic intake, in OpenFOAM
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Contributors: Shin Sugiyama, Masahiro Minowa, Marius Schaefer
Date: 2019-02-28
... This is a data set published in the paper below. Sugiyama, S., Minowa, M., & Schaefer, M. (2019). Underwater ice terrace observed at the front of Glaciar Grey, a freshwater calving glacier in Patagonia. Geophysical Research Letters, 46. https://doi.org/10.1029/2018GL081441
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