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1. Testing Hopkins’ Bioclimatic Law with PhenoCam data

   https://doi.org/10.1002/aps3.1228  

   Richardson, Andrew_D; Hufkens, Koen; Li, Xiaolu; Ault, Toby_R (March 2019, Applications in Plant Sciences)

   Premise of the StudyWe investigated the spatial and temporal patterns of vegetation phenology with phenometrics derived from PhenoCam imagery. Specifically, we evaluated the Bioclimatic Law proposed by Hopkins, which relates phenological transitions to latitude, longitude, and elevation. Methods“Green‐up” and “green‐down” dates—representing the start and end of the annual cycles of vegetation activity—were estimated from measures of canopy greenness calculated from digital repeat photography. We used data from 65 deciduous broadleaf (DB) forest sites, 18 evergreen needleleaf (EN) forest sites, and 21 grassland (GR) sites. ResultsDBgreen‐up dates were well correlated with mean annual temperature and varied along spatial gradients consistent with the Bioclimatic Law. Interannual variation inDBphenology was most strongly associated with temperature anomalies during a relatively narrow window of time.ENphenology was not well correlated with either climatic factors or spatial gradients, but similar toDBphenology, interannual variation was most closely associated with temperature anomalies. ForGRsites, mean annual precipitation explained most of the spatial variation in the duration of vegetation activity, whereas both temperature and precipitation anomalies explained interannual variation in phenology. DiscussionPhenoCam data provide an objective and consistent means by which spatial and temporal patterns in vegetation phenology can be investigated. 

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2. Exotic Picard groups and chromatic vanishing via the Gross-Hopkins duality

   https://doi.org/10.1016/j.topol.2023.108742  

   Culver, Dominic Leon; Zhang, Ningchuan (January 2024, Topology and its Applications)
3. Land-grant lessons for Anthropocene universities

   https://doi.org/10.1007/s10584-021-03029-9  

   Kopp, Robert E. (March 2021, Climatic Change)

   null (Ed.)

   Abstract Established amidst the bloodshed of the Civil War, land-grant universities, together with the associated agricultural experiment stations and cooperative extension services, have played a crucial role in democratizing scientific knowledge and addressing intertwined educational, environmental, economic, and democratic challenges within the USA. Indeed, they have arguably pioneered the idea of “usable science.” Today, the urgent challenges of the Anthropocene demand a more robust relationship between scientific research and on-the-ground action, strong networks sharing local lessons globally, and channels for injecting global, long-term perspectives into the noise of short-termism. The land-grant experience provides lessons for “Anthropocene universities” seeking to tackle these challenges, including the importance of (1) establishing or expanding university-based boundary organizations akin to cooperative extension, (2) incentivizing the integration of engagement into the university’s research, teaching, and service missions, (3) centering values of democracy, justice, equity, and inclusion in engagement, and (4) cooperating across institutions and sectors. Given the urgency of fully engaging academic institutions as players and connectors in the real-world challenges of addressing climate change and biodiversity loss, there is little time to waste. 

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4. Arthropod communities in the Second College Grant, NH ver 1

   https://doi.org/10.6073/pasta/7333f727fc8396555d18913d6e8e6d52  

   Ziadeh, Christopher P; Ziadeh, Shayleigh B; Aflague, Breanne H; Townley, Mark A; Ayres, Matthew P; Garnas, Jeffrey R (January 2023, Environmental Data Initiative)

   Arthropods are active during the winter in temperate regions. Many use the seasonal snowpack as a buffer against harsh ambient conditions and remain active in a refugium known as the subnivium. While the use of the subnivium by insects and other arthropods is well-established, far less is known about winter community composition, abundance, biomass, and diversity and how these characteristics compare with the community in the summer. Understanding subnivean communities is especially important given observed and anticipated changes in snowpack depth and duration with changing climate. We studied winter and summer insects and other arthropods using pitfall trapping in northern New Hampshire, where snowpack is still relatively intact. We found that compositions of the subnivium and summer arthropod communities differed. The subnivium arthropod community featured moderate levels of richness and other measures of diversity that tended to be lower than in the summer community. More striking, the subnivium community was much lower in overall abundance and biomass than the summer community. Interestingly, some groups and species of arthropods were dominant in the subnivium but either rare or absent in summer collections. These putative “subnivium specialists” included one spider (order: Araneae), Cicurina brevis (Emerton, 1890), and three rove beetles (order: Coleoptera, family: Staphylinidae) Arpedium cribratum Fauvel, 1878, Lesteva pallipes LeConte, 1863, and Porrhodites inflatus (Hatch, 1957). This study provides a detailed account of the subnivium arthropod community, presents novel concepts, and establishes baseline information on arthropod communities in the North American northeastern temperate forest. 

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5. Learning to Buy (and Sell) Demand Response * *This work was supported in part by NSF grant ECCS-1351621, NSF grant CNS-1239178, NSF grant IIP- 1632124, US DoE under the CERTS initiative, and the Simons Institute for the Theory of Computing.

   https://doi.org/10.1016/j.ifacol.2017.08.1193  

   Khezeli, Kia; Lin, Weixuan; Bitar, Eilyan (July 2017, IFAC-PapersOnLine)