Results 51 to 60 of about 262,989 (332)

Computer simulations of history of life: speciation, emergence of complex species from simpler organisms, and extinctions

, 2003
We propose a generic model of eco-systems, with a {\it hierarchical} food web structure. In our computer simulations we let the eco-system evolve continuously for so long that that we can monitor extinctions as well as speciations over geological time ...
Ackermann, Bak, Bak, Caldarelli, Carroll, Chowdhury, Chowdhury, Cohen, Cohen, Cohen, Debashish Chowdhury, di Collobiano, Dieckmann, Dietrich Stauffer, Doebeli, Drossel, Drossel, Drossel, Fussmann, Ghalambor, Goel, Hall, Hofbauer, Kauffman, Khibnik, Maynard-Smith, Maynard-Smith, Mayr, Mayr, Murray, Newman, Orr, Paczuski, Pimm, Post, Quince, Solé, Solé, Solé, Stauffer, Thompson, Thompson, Williams, Łaszkiewicz   +43 more
core   +1 more source

Microglia Mitochondria Support Neuronal Maturation via Metabolic and Transcriptional Reprogramming in Human 3D In Vitro Brain Model

Advanced Science, EarlyView.
xx xx. ABSTRACT Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by disrupted neuronal circuit maturation. Emerging evidence implicates microglial function and mitochondrial regulation as contributors to ASD‐associated biology, yet the mechanisms linking these processes to neuronal development remain poorly defined ...
Sydney P. Sterben, Charitha C. Anamala, Sahan B. S. Kansakar, Vaishnavi Koduri, Volha Liaudanskaya   +4 more
wiley   +1 more source

Species' traits and food‐web complexity interactively affect a food web's response to press disturbance

Ecosphere, 2016
Given current levels of biodiversity loss and environmental change, studies of how food webs respond to disturbance should broaden their focus beyond short‐term disturbances to explore the effects of long‐term, “press” disturbances.
K. L. Wootton, D. B. Stouffer
doaj   +1 more source

Catastrophic regime shifts in model ecological communities are true phase transitions [PDF]

, 2010
Ecosystems often undergo abrupt regime shifts in response to gradual external changes. These shifts are theoretically understood as a regime switch between alternative stable states of the ecosystem dynamical response to smooth changes in external ...
Capitán J A Cuesta J A, Feller W, Fernández A, Gilmore R, J A Capitán, J A Cuesta, Ludwig D, Meyer C D, Thom R, Trefethen L N, Walker B H   +10 more
core   +2 more sources

Unraveling the Morphological and Functional Maturation Mechanisms Underlying Human Neural Development Using iPSCs‐Derived Neuronal Model

Advanced Science, EarlyView.
Using human induced pluripotent stem cells (hiPSCs)‐derived neuronal model, Tian and colleagues reveal that voltage‐gated calcium channels Cav1.2 and Cav1.3, and their mediated calcium ion influx, are essential for early morphogenesis of human neuronal development, while ECEL1 underlies human neuronal functional developmental maturation through CALM3 ...
Yue Tian, Yi‐Chun Ou, Zi‐Xian Zhang, Jie Cai, Si‐Qing Cai, Guo‐Gang Xing   +5 more
wiley   +1 more source

Overfishing and the replacement of demersal finfish by shellfish: an example from the English Channel. [PDF]

PLoS ONE, 2014
The worldwide depletion of major fish stocks through intensive industrial fishing is thought to have profoundly altered the trophic structure of marine ecosystems.
Carlotta Molfese, Doug Beare, Jason M Hall-Spencer   +2 more
doaj   +1 more source

Combined stable isotope and gut contents analysis of food webs in plant-dominated, shallow lakes [PDF]

, 2003
1. To determine feeding links between primary producers, invertebrates and fish, stable isotope analyses and gut content analyses of fish were conducted on the components of four shallow, eutrophic to hypertrophic, plant-dominated lakes. 2.
Adams, Ben-David, Brönmark, Brönmark, Burks, Canfield, Carpenter, Cattaneo, DeNiro, DeNiro, Diehl, Diehl, Fry, Fryer, Fryer, Gervais, Grey, Hecky, Hoyer, J. Iwan Jones, Jeppesen, Jeppesen, Jones, Jones, Jones, Jones, Jones, Kairesalo, Mackereth, Marklund, Mazumder, Moss, Pennock, Phillips, Phillips, Phillips, Sand-Jensen, Scheffer, Susan Waldron, Svanbäck, Thorpe, Timms, Vander-Zanden, Yoshii, Yoshioka, Zippin   +45 more
core   +1 more source

Paving the Way to Elucidate Hg's Role in Tumorigenesis

Advanced Science, EarlyView.
Tumorigenesis can result from diverse environmental carcinogens. Among them, mercury—a lifelong bioaccumulative Group 2B carcinogen—has tumorigenic potential that remains poorly understood due to confounding co‐exposures and limited organ‐specific data.
Shouying Li, Rong Zhong, Zhenyang Yu, Hualing Fu, Jin Chen, Jia Wei, Ningwei Zhao, Le Qu, Tiantian Li, Wenli Tang, Huan Zhong   +10 more
wiley   +1 more source

Nitrogen isotope composition of amino acids reveals trophic partitioning in two sympatric amphipods

Ecology and Evolution, 2020
According to ecological theory, two species cannot occupy the same niche. Using nitrogen isotope analyses (δ15N) of amino acids, we tested the extent to which two sympatric deposit‐feeding amphipods, Monoporeia affinis and Pontoporeia femorata, partition
Matias Ledesma, Elena Gorokhova, Henry Holmstrand, Andrius Garbaras, Agnes M. L. Karlson   +4 more
doaj   +1 more source

Concentration of Metals in Native and Invasive Species of Fish in the Fluvial-Lagoon-Deltaic System of the Palizada River, Campeche

Fishes, 2021
Aquatic organisms, such as fish, are important indicators of the bioavailability of metals in coastal environments, demonstrating the capacity of different species to bioaccumulate these metallic elements.
María del Refugio Castañeda-Chávez, Fabiola Lango-Reynoso, Gabycarmen Navarrete-Rodríguez, Armando Toyokazu Wakida-Kusunoki   +3 more
doaj   +1 more source