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Insulin imports fail to meet many countries' needs 期刊论文
Science, 2021
作者:  Abhishek Sharma;  Warren A. Kaplan
收藏  |  浏览/下载：16/0  |  提交时间：2021/08/10
EU Court to rule on banned pesticide use 期刊论文
Science, 2021
作者:  Yaffa Epstein;  Guillaume Chapron;  François Verheggen
收藏  |  浏览/下载：13/0  |  提交时间：2021/07/27
Not open and shut 期刊论文
Science, 2020
作者:  Jennifer Couzin-Frankel;  Gretchen Vogel;  Meagan Weiland
收藏  |  浏览/下载：7/0  |  提交时间：2020/07/21
Global solutions to a silent poison 期刊论文
Science, 2020
作者:  Yan Zheng
收藏  |  浏览/下载：24/0  |  提交时间：2020/05/25
Internal state dynamics shape brainwide activity and foraging behaviour 期刊论文
NATURE, 2020, 577 (7789) : 239-+
作者:  Marques, Joao C.;  Li, Meng;  Schaak, Diane;  Robson, Drew N.;  Li, Jennifer M.
收藏  |  浏览/下载：6/0  |  提交时间：2020/07/03

The brain has persistent internal states that can modulate every aspect of an animal'  s mental experience(1-4). In complex tasks such as foraging, the internal state is dynamic(5-8). Caenorhabditis elegans alternate between local search and global dispersal(5). Rodents and primates exhibit trade-offs between exploitation and exploration(6,7). However, fundamental questions remain about how persistent states are maintained in the brain, which upstream networks drive state transitions and how state-encoding neurons exert neuromodulatory effects on sensory perception and decision-making to govern appropriate behaviour. Here, using tracking microscopy to monitor whole-brain neuronal activity at cellular resolution in freely moving zebrafish larvae(9), we show that zebrafish spontaneously alternate between two persistent internal states during foraging for live prey (Paramecia). In the exploitation state, the animal inhibits locomotion and promotes hunting, generating small, localized trajectories. In the exploration state, the animal promotes locomotion and suppresses hunting, generating long-ranging trajectories that enhance spatial dispersion. We uncover a dorsal raphe subpopulation with persistent activity that robustly encodes the exploitation state. The exploitation-state-encoding neurons, together with a multimodal trigger network that is associated with state transitions, form a stochastically activated nonlinear dynamical system. The activity of this oscillatory network correlates with a global retuning of sensorimotor transformations during foraging that leads to marked changes in both the motivation to hunt for prey and the accuracy of motor sequences during hunting. This work reveals an important hidden variable that shapes the temporal structure of motivation and decision-making.


  
Competition and tolerance of low soil water favor Carex dominance over establishing Acer seedlings in managed temperate mesic forests 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 449
作者:  Randall, J. A.;  Walters, M. B.
收藏  |  浏览/下载：5/0  |  提交时间：2019/11/27
Rates of Wintertime Atmospheric SO2 Oxidation based on Aircraft Observations during Clear-Sky Conditions over the Eastern United States 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (12) : 6630-6649
作者:  Green, Jaime R.;  Fiddler, Marc N.;  Holloway, John S.;  Fibiger, Dorothy L.;  McDuffie, Erin E.;  Campuzano-Jost, Pedro;  Schroder, Jason C.;  Jimenez, Jose L.;  Weinheimer, Andrew J.;  Aquino, Janine;  Montzka, D. D.;  Hall, Samuel R.;  Ullmann, Kirk;  Shah, Viral;  Jaegle, Lyatt;  Thornton, Joel A.;  Bililign, Solomon;  Brown, Steven S.
收藏  |  浏览/下载：15/0  |  提交时间：2019/11/26
SO2 oxidation  power plant emissions  urban emissions  wintertime rates  
The Relationship between Cool and Warm Season Moisture over the Central United States, 1685-2015 期刊论文
JOURNAL OF CLIMATE, 2018, 31 (19) : 7909-7924
作者:  Torbenson, Max C. A.;  Stahle, David W.
收藏  |  浏览/下载：6/0  |  提交时间：2019/04/09
Atlantic Ocean  North America  Atmosphere-ocean interaction  Paleoclimate  Soil moisture  
Regional responses to future, demand-driven water scarcity 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2018, 13 (9)
作者:  Cui, Ryna Yiyun;  Calvin, Katherine;  Clarke, Leon;  Hejazi, Mohamad;  Kim, Son;  Kyle, Page;  Patel, Pralit;  Turner, Sean;  Wise, Marshall
收藏  |  浏览/下载：4/0  |  提交时间：2019/04/09
water demand  water scarcity  electricity response  agriculture response  integrated assessment model  water-energy-land nexus  
Parametric transitions between bare and vegetated states in water-driven patterns 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (32) : 8125-8130
作者:  Bertagni, Matteo Bernard;  Perona, Paolo;  Camporeale, Carlo
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
ecomorphodynamics  stochastic processes  rivers  vegetation  Devonian plant hypothesis