land use impacts
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2021 ◽  
Author(s):  
Sigit D Sasmito ◽  
Pierre Taillardat ◽  
Letisha Fong ◽  
Jonathan Ren ◽  
Hanna Sundahl ◽  
...  

Author(s):  
Kevin J. Lyons ◽  
Anna-Maria Hokajärvi ◽  
Jenni Ikonen ◽  
Ari Kauppinen ◽  
Ilkka T. Miettinen ◽  
...  

Standard physicochemical water quality analyses and microbial indicator analyses leave much of the (largely uncultured) complexity of groundwater microbial communities unexplored. This study combined these standard methods with additional analyses of stable water isotopes, bacterial community data, and environmental data about the surrounding areas to investigate the associations between physicochemical and microbial properties of 28 shallow groundwater wells in Finland.


Author(s):  
Hugo Duarte Moreno ◽  
Hauke Reuter ◽  
Alfred Kase ◽  
Mirta Teichberg

2021 ◽  
Vol 349 ◽  
pp. 53-65
Author(s):  
Prospère SABO ◽  
Amadé OUÉDRAOGO ◽  
D. S. J. Charlemagne GBEMAVO ◽  
Kolawolé Valère SALAKO ◽  
Romain GLÈLÈ KAKAï

Boswellia dalzielii Hutch., an African frankincense tree, is a socio-economically important aromatic and medicinal tree. It is currently threatened by uncontrolled exploitation, and therefore requires action to ensure its sustainable management. This study assessed the population structure and regeneration of its natural stands across three land use types in Burkina Faso: woodlands, fallows and farmlands. Sixty, fifty and fifty 50 m × 20 m plots were established respectively in woodlands, fallows and farmlands. All the plots were surveyed for adult tree (dbh ≥ 5 cm) density, dbh, total height and health conditions. Data on regeneration density (dbh < 5 cm), source (generative, stem shoots, suckers), total height and collar diameter were also collected. The results show similar total tree heights (7.0 m-9.0 m) but significantly (p < 0.05) smaller tree dbh in woodlands (mean ± SD: 20.5 ± 0.49 cm) and fallows (29.3 ± 0.64 cm) than in farmlands (32.8 ± 0.15 cm). Adult tree density (trees/ha) was 1.3 and 2.7 times higher in woodlands (82.37 ± 6.57) than in fallows (62.00 ± 3.98) and farmlands (30.02 ± 1.63), respectively. The density of regeneration in woodlands was 28 and 6 times higher than in fallows and farmlands, respectively. The majority (> 50%) of regenerating plants were suckers and no seedling regeneration was found in farmlands. The distribution of trees in diameter classes was J-shaped in woodlands, bell-shaped in farmlands and positive asymmetric in fallows, indicating recruitment bottlenecks. We found that 80.18% of individuals encountered were unhealthy. Intensive debarking and cutting were the main threats to the species and no conservation strategy was in place in the study region. We suggest measures to reduce intensive debarking and cutting, which should contribute to better management of the species.


Author(s):  
Christian Devenish ◽  
Alexander C. Lees ◽  
Nigel J. Collar ◽  
Stuart J. Marsden

Ecology ◽  
2021 ◽  
Author(s):  
Danielle K. Petsch ◽  
Shane A. Blowes ◽  
Adriano S. Melo ◽  
Jonathan M. Chase

2021 ◽  
Vol 21 (3) ◽  
pp. 72-94
Author(s):  
Cher Hill ◽  
Rick Bailey ◽  
Cheryl Power ◽  
Nicole McKenzie

This paper describes a unique collaborative action research project that brings together members of the q̓íc̓əy̓ (Katzie) First Nation, post-secondary and K-12 communities, as well as foresters and environmentalists, to restore creeks that have been compromised by land use impacts, forest removal, and global warming.  Identifying creek restoration as a site for multi-system change and wholistic re/conciliation, we explored the following questions:  How can we bring together members of our diverse communities to learn about the dire condition of our watershed and take action to help Salmon? How might this collaborative work strengthen community relationships?  What contextual factors enable and impede the enactment of our vison? Through iterative cycles of action and reflection, intentional trial and error, conversational inquiry, and storytelling, we identified ‘guideposts’ that will inform our work moving forward.  Our research has illuminated structural changes that could enhance environmental justice for Salmon, such as empowering the caretakers of creeks and rivers since time immemorial as sovereign leaders of restorative projects, affirming the rights of the Land and other sentient beings to receive care, developing leadership structures that serve to unite (rather than polarize) citizens in addressing environmental problems, and forming diverse relational webs that exceed partnerships. Action research, informed by Indigenous worldviews, can play a pivotal role in supporting communities in assuming relational responsibility in caring for the Land and one another.  As Donna Haraway (2016) contends, it is time to ‘make kin’ outside of our genetic and ancestral ties to ‘change the story’.


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