Selective Press Extinctions, but Not Random Pulse Extinctions, Cause Delayed Ecological Recovery in Communities of Digital Organisms

2009 ◽  
Vol 173 (4) ◽  
pp. E139-E154 ◽  
Author(s):  
Gabriel Yedid ◽  
Charles A. Ofria ◽  
Richard E. Lenski
Keyword(s):  
Digital Organisms ◽  
Random Pulse ◽  
Ecological Recovery

scholarly journals A systemic socio-ecological recovery from Covid-19

2021 ◽  
pp. 146801812110191
Author(s):  
William Hynes
Keyword(s):  
Financial Economic ◽  
Global Scale ◽  
Economic Approach ◽  
Short Term ◽  
Current Crisis ◽  
Policy Alternatives ◽  
Economic Thinking ◽  
Emergency Measures ◽  
Ecological Recovery

New economic thinking and acting through a systemic approach could outline policy alternatives to tackle the global-scale systemic challenges of financial, economic, social and environmental emergencies, and help steer our recovery out of the current crisis. A systemic recovery requires an economic approach that balances several factors - markets and states, efficiency and resilience, growth and sustainability, national and global stability, short-term emergency measures and long-term structural change. To achieve this, we need to think beyond our policy silos, comprehend our interconnections, and build resilience into our systems.

scholarly journals Urban Rivers Corridors in the Don Catchment, UK: From Ignored, Ignoble and Industrial to Green, Seen and Celebrated

2021 ◽  
Vol 13 (14) ◽  
pp. 7646
Author(s):  
Ed Shaw ◽  
Debbie Coldwell ◽  
Anthony Cox ◽  
Matt Duffy ◽  
Chris Firth ◽  
...  
Keyword(s):  
Industrial Revolution ◽  
Urban River ◽  
Urban Rivers ◽  
River Habitat ◽  
Negative Perceptions ◽  
High Degree ◽  
River Corridors ◽  
Advance Knowledge ◽  
Ecological Recovery

Research on urban rivers often seeks to find commonalities to advance knowledge of the effect of urbanisation on rivers, and rightly so. But it is important, also, to develop a complementary understanding of how urban rivers can be distinct, to facilitate a more nuanced view of concepts such as the ‘urban river syndrome’ and of the challenges facing those who wish to create more sustainable urban river corridors. To this end we use the Don Catchment as a case study to illustrate how historic patterns of urbanisation have been fundamental in shaping the catchment’s rivers. Following the Industrial Revolution, the catchment became an industrial centre, resulting in the ecological death of river ecosystems, and the disconnection of communities from stark urban river corridors. Widescale deindustrialisation in the 1970s and 1980s then resulted in a partial ecological recovery of the rivers, and ignited public interest. This history has imbued the catchment’s urban river corridors with a distinctive industrial character that can vary greatly between and within settlements. It has also left a legacy of particular issues, including a high degree of river habitat fragmentation and physical modification, and of negative perceptions of the rivers, which need improving to realise their potential as assets to local communities.

Ecological Restoration by a Multistage Floating-Bed System in a Eutrophic Urban River, China

2012 ◽  
Vol 157-158 ◽  
pp. 945-949 ◽  
Author(s):  
Yu Hui Chen ◽  
Yong Zhang ◽  
Min Sheng Huang ◽  
Yi Fan Zhang ◽  
Feng Zhao ◽  
...  
Keyword(s):  
Water Quality ◽  
Ecological Restoration ◽  
Control Area ◽  
Urban River ◽  
Polluted Water ◽  
Recovery Efficiency ◽  
Dynamic Variation ◽  
Multistage System ◽  
Restoration Work ◽  
Ecological Recovery

By constructing a multistage floating-bed system by combination of macrophytes, aquatic animals and aquamats ecobase for ecolgical restoration in a eutrophic urban river, the improvement of water quality and the dynamic variation of phytoplankton was investigated. The results showed that the average removal rates were 9.85%, 15.86%, 24.47% and 12.75%, respectively. phytoplankton quantity was decreased by 22.82×104ind./L and Shannon-Weiner Index was increased by 0.11 averagely, after the restoration work in the demonstration area comparing to control area. The negative correlation between Shannon-Weiner Index of phytoplankton and TN(-0.77, P<0.01) showed that multistage system might effect phytoplankton indirectly through removing nutrients from river, which indicated that the employment of ecological restoration technology of multistage floating-bed system was effective in raising the ecological recovery efficiency of polluted water bodies.

Sign in / Sign up

Export Citation Format

Share Document