Results 51 to 60 of about 129,145 (264)

Gamma spectrometric analysis of lower Danube samples from Romania [PDF]

Nuclear Technology and Radiation Protection
This paper focuses on the natural and anthropogenic radioactivity of sediment samples from key spots located in the Lower Danube area and the Danube Delta region. The idea of the study is to confirm that gamma spectrometry is an efficient method
Pojar Vintila Iulian, Ujeniuc Sorin, Catianis Irina, Alexandrescu Bogdan, Scrieciu Albert M., Vasilca Silvana, Suvaila Rares   +6 more
doaj   +1 more source

Divergent Responses of Bacterial Communities to Permafrost Degradation and Their Associations With Carbon Across Vertical Profiles

Advanced Science, EarlyView.
Bacterial α‐diversity decreases, but stochasticity and community stability increase across the 15 m‐depth vertical profiles and along the degraded gradient within the active layer. The abundance and interaction of core taxa mainly control community stability in the active and permafrost layers, respectively.
Shengyun Chen, Yuzheng Gu, Ali Bahadur, Enyan Liu, Tonghua Wu, Xiaofan Zhu, Yuanqiang Zou, Hewei Liang, Peijie Wei, Linwei Wu, Qingbai Wu, Peizhi Yang, Hongyan Yu, Yunfeng Yang   +13 more
wiley   +1 more source

Risk of vector tick exposure initially increases, then declines through time in response to wildfire in California

Ecosphere, 2018
Identifying the effects of human‐driven perturbations, such as species introductions or habitat fragmentation, on the ecology and dynamics of infectious disease has become a central focus of disease ecologists.
Andrew J. MacDonald, David W. Hyon, Akira McDaniels, Kerry E. O'Connor, Andrea Swei, Cheryl J. Briggs   +5 more
doaj   +1 more source

Fine-Scale Vegetation Characteristics Drive Insect Ensemble Structures in a Desert Ecosystem: The Tenebrionid Beetles (Coleoptera: Tenebrionidae) Inhabiting the Ulan Buh Desert (Inner Mongolia, China)

Insects, 2020
In community ecology, ensembles are defined as phylogenetically bounded groups of species that use a similar set of resources within a community. Tenebrionids are a conspicuous faunal component of Asian deserts, but little is known about their community ...
Yiping Niu, Guodong Ren, Giulia Lin, Letizia Di Biase, Simone Fattorini   +4 more
doaj   +1 more source

Gaining perspective on what we've lost: the reliability of encoded anecdotes in historical ecology. [PDF]

PLoS ONE, 2012
Historical data are essential in fisheries management and conservation, especially for species that suffered significant population declines prior to ecological data collection.
Dalal Al-Abdulrazzak, Robin Naidoo, Maria Lourdes D Palomares, Daniel Pauly   +3 more
doaj   +1 more source

Microenvironment Self‐Adaptive Nanoarmor to Address Adhesion‐ and Colonization‐Related Obstacles in Impaired Intestine Promote Bacteriotherapy Against Parkinson's Disease

Advanced Science, EarlyView.
A microenvironment self‐adaptive nanoarmor is developed to effectively address the adhesion‐ and colonization‐related challenges posed by multiple physiological and pathological characteristics in the intestine. L. plantarum@MPN@CS showed significant therapeutic potential in treating Parkinson's disease (PD), a model for extraintestinal disorders, as ...
Limeng Zhu, Yuyu Wu, Yingjie Chen, Xiyi Chen, Xingjie Zan, Yanlong Liu, Wujun Geng   +6 more
wiley   +1 more source

Extracellular Vesicles of Streptococcus anginosus Mediate Gastritis via Epithelial Barrier Disruption and Macrophage‐driven Inflammation

Advanced Science, EarlyView.
Streptococcus anginosus extracellular vesicles (SA‐EVs) accumulate in gastric tissue, disrupt epithelial tight junctions, and induce gastritis characterized by neutrophil infiltration and elevated cytokines (TNF‐α, IL‐6, IL‐17A). Proteomics identifies TMPC and FBP62 as key SA‐EVs virulence factors; their genetic deletion attenuates inflammation ...
Ying Gong, Lina Duan, Jie Xiao, Yulu Deng, Hongxia Wang, Yajie Zhang, Xiumei Hu, Haifang Wang, Taixue An, Xin Li, Yurong Qiu, Lei Zheng, Haixia Li   +12 more
wiley   +1 more source

Viromes vs. mixed community metagenomes: choice of method dictates interpretation of viral community ecology

Microbiome
Background Viruses, the majority of which are uncultivated, are among the most abundant biological entities on Earth. From altering microbial physiology to driving community dynamics, viruses are fundamental members of microbiomes.
James C. Kosmopoulos, Katherine M. Klier, Marguerite V. Langwig, Patricia Q. Tran, Karthik Anantharaman   +4 more
doaj   +1 more source

Exploring black kite (Milvus migrans) dynamics: Seasonal abundance and habitat preferences in an urban gradient

Journal of Asia-Pacific Biodiversity
Urban expansion globally has altered biodiversity by transforming urban habitats, leading to habitat loss and changes in ecological systems. Black kites (Milvus migrans) are adaptable raptors across diverse landscapes, from natural to highly urbanized ...
Ghulam Mustafa Rashid, Abida Butt, Abdul Qadir, Mirza Habib Ali   +3 more
doaj   +1 more source

Stochastic model for the species abundance problem in an ecological community [PDF]

Physical Review E, 2004
We propose a model based on coupled multiplicative stochastic processes to understand the dynamics of competing species in an ecosystem. This process can be conveniently described by a Fokker-Planck equation. We provide an analytical expression for the marginalized stationary distribution.
PIGOLOTTI S, FLAMMINI A, MARITAN, AMOS
openaire   +4 more sources