Results 1 to 10 of about 998,315 (160)
Abstract Invasive species can dramatically alter ecosystems, but eradication is difficult, and suppression is expensive once they are established. Uncertainties in the potential for expansion and impacts by an invader can lead to delayed and inadequate suppression, allowing for establishment.
Brian D. Healy +5 more
wiley +1 more source
Abstract As agricultural land use and climate change continue to pose increasing threats to biodiversity in sub‐Saharan Africa, efforts are being made to identify areas where trade‐offs between future agricultural development and terrestrial biodiversity conservation are expected to be greatest. However, little research so far has focused on freshwater
Cody Danaher +3 more
wiley +1 more source
A systematic review of 20 years of crisis and disaster research: Trends and progress
Abstract The field of crisis and disaster studies has proliferated over the past two decades. Attention is bound to grow further as the world negotiates the prolonged challenges of the Covid‐19 pandemic. In this review, we provide an overview of the main foci, methods, and research designs employed in the crisis and disaster research fields in the ...
Jeroen Wolbers +2 more
wiley +1 more source
Complex and nonlinear climate‐driven changes in freshwater insect communities over 42 years
Abstract The ongoing biodiversity crisis becomes evident in the widely observed decline in abundance and diversity of species, profound changes in community structure, and shifts in species’ phenology. Insects are among the most affected groups, with documented decreases in abundance up to 76% in the last 25–30 years in some terrestrial ecosystems ...
Viktor Baranov +4 more
wiley +1 more source
Abstract Stand structure develops with stand age. Old‐growth forests with well‐developed stand structure support many species. However, development rates of stand structure likely vary with climate and topography. We modeled structural development of 4 key stand variables and a composite old‐growth index as functions of climatic and topographic ...
Yuichi Yamaura +6 more
wiley +1 more source
针对废水生物处理中导流筒直径、表观气速、液位高度、黏度和表面张力对气升式反应器内流场和氧传质系数的影响进行研究,并利用气水冷模实验对气升式反应器进行简化分析。随着导流筒直径的增加,气含率、液速和氧传质系数都增大,最佳导流筒直径为120 mm。表观气速存在一个临界值,低于临界值,气含率、下降段液速和体积氧传质系数等特征参数随气速增加迅速增大;高于临界值特征参数增加变缓,最佳表观气速为3.0×10-3 m/s。随着液位高度的增加,气含率和体积氧传质系数减小,下降段液速增大,最佳液位高度为900 mm ...
吴松, 任慧敏
doaj
电晕是造成车顶绝缘子老化的主要因素之一。基于高速气流试验平台,试验研究了高速气流电晕环境下硅橡胶表面的憎水性分布,通过分析高速气流对电晕放电路径和放电电流的影响,讨论了憎水性分布发生偏移的原因。研究发现:高速气流环境下电晕强度较大时,憎水性丧失最严重的部位沿气流方向发生偏移。其原因是:当电晕放电沿针尖发展至针板间隙空间时,高速气流使得电晕放电路径沿气流方向偏转。气流速度一定时,离子所受电场力随电压的增大而增大,高速气流不易将其吹离针板间隙空间 ...
张晓青 +4 more
doaj
ABSTRACT The urgent environmental crisis caused by polyethylene terephthalate (PET) waste necessitates efficient upcycling strategies. Herein, we establish a novel pathway to transform waste PET plastic into a high‐performance catalytic material for mediating the oxygen evolution reaction (OER). Through a one‐step hydrothermal process, waste PET serves
Xin Wang +5 more
wiley +1 more source
ABSTRACT Skin wound injuries are often accompanied by bacterial infections and severe inflammation. Especially, M1‐type macrophages at the wound site can trigger a cascade of inflammatory responses, mediating a vicious cycle of inflammation. Meanwhile, hypoxia further exacerbates vascular damage and constriction in the wound microenvironment, thereby ...
Xianfeng Wang +6 more
wiley +1 more source
A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells
ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou +12 more
wiley +1 more source

