5/5/2021. Mutual domain URL sharing by Twitter users, where each node is a domain. Undirected edges connect two domains A and B if at least 1% of the users sharing either A or B also shared the other domain (i.e., the Jaccard index is greater than 1%). Nodes with no connections have been dropped.
... In this visualization – and consistent with our findings from the previous section – we see strong misinfo-misinfo connectivity and weak misinfo-info connectivity. In particular, misinfo/info domains have an average of 7.55/1.57 connections, respectively, within their category, and 1.00/0.86 connections outside their category Vibhor Sehgal, Ankit Peshin, Sadia Afroz, and Hany Farid 2021. Mutual hyperlinking among misinformation peddlers. Preprint. LINK |
An animation I made for an assignment in an R/data management class. It was surprisingly simple using data from Movebank.org and the R packages ggplot2, ggmap, and gganimation.
"Caribou (Rangifer tarandus) in British Columbia, Canada select different winter and summer habitats in order to balance forage requirements and predator avoidance. Though seasonal ranges can overlap, caribou typically select low-elevation forests in winter and alpine or sub-alpine areas in summer. This animation shows the seasonal movement of four caribou individuals over a period of six years between lower (green terrain) and higher (white terrain) elevations. Multiple locations were recorded per day, and this visual shows all locations per day, which is why more than four points are visible at once." |
3/31/2020. Phase plane showing equilibrium covers of macroalgae and corals and trajectories over time. a, b, Equilibrium covers are denoted by black circles; trajectories are shown in red for grazing intensities of 0.3 (a) and 0.1 (b). Trajectories may be thought of as arrows beginning at different initial covers (red circles) and tending toward the stable (subscript s) rather than the unstable (subscript u) equilibria.
Peter Mumby, Alan Hastings, and Helen Edwards 2007. Thresholds and the resilience of Caribbean coral reefs. Nature. 450, pp. 98-101. LINK |
2/24/2020. Folded stability landscape and resilience assessment for Barents Sea cod (1949–2009). On the empirical folded stability landscape for Barents Sea cod (a), continuous black lines indicate the linear attractors, dotted black line indicates the possible extension of the lower branch, dashed grey lines indicate the approximate position of the basin’s borders, and F1 and F2 indicate the tipping points. Colours represent the relative resilience contour interpolated from the relative resilience of each year. Circles and arrows indicate the 1981 population shift. (b) indicates the relative resilience of each year; black and grey lines refer to the old and new state, respectively.
Paraskevas Vasilakopoulos and C. Tara Marshall 2014. Resilience and tipping points of an exploited fish population over six decades. Global Change Biology. 21, pp. 1834-1847. LINK |
2/18/2020. Big-data animal tracking. The red trajectory shows how studies can now track animals with unprecedented detail, allowing researchers to predict the causes and consequences of movements, and animals to become environmental sensors. Multisensor tracking tags monitor movement, behavior, physiology, and environmental context. Geo- and biosciences merge now using a multitude of remote-sensing data. Understanding how social and interspecific interactions affect movement is the next big frontier.
Roland Kays et al. 2015. Terrestrial animal tracking as an eye on life and planet. Science. 348(6240), aaa2478. LINK |