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Floristic Composition, Population Structure, and Recruitment Status of Plant Species: A Case Study of Farmer-Managed Natural Regeneration Practices in Arid and Semi-Arid Lands in Kenya

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Open Journal of Forestry 2024年第2期14卷 141-154页

作者： Simon Kosgei Choge Samson Okoth Ojunga dub Isacko Dokata William Kimen Chepkirui Justus Musau Faith Milkah Muniale Ivan Kiplagat Kiptui Kenya Forestry Research Institute-Rift Valley Eco-Region Research Program Marigat Kenya Kenya Forestry Research Institute-Lake Victoria Eco-Region Research Program Kisumu Kenya Kenya Forestry Research Institute-Rift Valley Eco-Region Research Program Londiani Kenya CRIFSUP Project World Vision Kenya Nairobi Kenya

The technique of Farmer Managed Natural Regeneration (FMNR) is being promoted as a cost-effective approach for restoring degraded arable dry lands. Its effectiveness has been observed in many countries across the globe, where it is a traditional practice, and is now being encouraged across the African continent. This study aimed to evaluate the impact of FMNR on floristic Composition, Vegetation Structure, and Regeneration Status of woody Plant Species in the severely degraded Central Rift, Kenya. The study systematically assessed how FMNR influenced species composition, vegetation structure and regeneration status from two sample plots involved in FMNR practices. Transect lines and quadrats methods were utilized to collect data, specifically regarding the floristic composition, vegetation structure, and regeneration status of woody plant species. Quadrats and sub-quadrats of varying sizes (10 m by 10 m, 5 m by 5 m, and 1 m by 1 m) were nested along the transect lines for data collection. Furthermore, measurements of tree growth and development, including root collar diameter, diameter at breast height (D130) and heights within the study blocks, were taken. The data was then analyzed using R-software. Results showed a marked progressive increase in numbers of trees, saplings, seedlings, shrubs and herbs in all FMNR sites and reductions in all non-FMNR sites. The study advocates for widespread promotion of the FMNR practice both as an environmental conservation and restoration strategy.

关键词： Farmer Managed Natural Regeneration FMNR Floristic Composition Vegetation Structure Regeneration Biodiversity

Investigation on removal pathways of Di 2-ethyl hexyl phthalate from synthetic municipal wastewater using a submerged membrane bioreactor

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Journal of environmental Sciences 2015年第11期27卷 37-50页

作者： Mehdi Zolfaghari Patrick Drogui Brahima Seyhi Satinder Kaur Brar Gerardo Buelna Rino dubé Nouha Klai National Institute of Scientific Research Water Earth and Environment (INRS-ETE) University of Quebec Industrial Research Center of Quebec

Highly hydrophobic Di 2-ethyl hexyl phthalate（DEHP） is one of the most prevalent plasticizers in wastewaters. Since its half-life in biological treatment is around 25 days, it can be used as an efficiency indicator of wastewater treatment plant for the removal of hydrophobic emerging contaminants. In this study, the performance of submerged membrane bioreactor was monitored to understand the effect of DEHP on the growth of aerobic microorganisms. The data showed that the chemical oxygen demand（COD）and ammonia concentration were detected below 10 and 1.0 mg/L, respectively for operating conditions of hydraulic retention time（HRT） = 4 and 6 hr, sludge retention time（SRT） = 140 day and sludge concentration between 11.5 and 15.8 g volatile solid（VS）/L. The removal efficiency of DEHP under these conditions was higher and ranged between 91% and 98%. Results also showed that the removal efficiency of DEHP in biological treatment depended on the concentration of sludge, as adsorption is the main mechanism of its removal. For the submerged membrane bioreactor, the pore size is the pivotal factor for DEHP removal, since it determines the amount of soluble microbial products coming out of the process. Highly assimilated microorganisms increase the biodegradation rate, as 74% of inlet DEHP was biodegraded; however, the concentration of DEHP inside sludge was beyond the discharge limit. Understanding the fate of DEHP in membrane bioreactor,which is one of the most promising and futuristic treatment process could provide replacement for conventional processes to satisfy the future stricter regulations on emerging contaminants.

关键词： Di 2-ethyl hexyl phthalate Submerged membrane bioreactor Removal efficiency Soluble microbial products Toxicity

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Grooming Leaders

ChinAfrica 2016年第10期8卷 26-27页

作者： Francois dubé

＂THIS auditorium has witnessed many historical events and I believe this will be one of them.＂ These profound words launched the 2016 Yenching Academy （YCA）, an elite international program at Peking University that this year saw a gathering of 124 outstanding young men and women from 42 countries. The talented group officially became Yenching Scholars at the university＇s old auditorium on September 10,

关键词： men and women

An instrumental soloist from Hangzhou tugs at Morocco＇s heartstrings with her Chinese pipa

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ChinAfrica 2017年第7期9卷 56-57页

作者： Francois dubé

CONCERT performer Yu Lingling likes to point out that her hometown,Hangzhou,East China's Zhejiang *** the starting point of the ancient Silk Road,a corridor of intercivilizational *** if predestined by the place of her birth,the artist took the art of cultural sharing into her own hands and now travels the world with the goal of promoting China's traditional music.

关键词：英语阅读理解时事

enchanting Undulations

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ChinAfrica 2017年第9期9卷 50-51页

作者： Fran?is dubé

WHen Sammia Du took her first step on stage in a Cairo five-star hotel, the public looked a bit ambivalent. Her Asian features were unlike those of any other Egyptian belly dancers who performed that night, But as she closed her eyes and began to ripple to the rhythm of the drums, the young Chinese dancer was quick to dispel any doubts.

关键词： enchanting Undulations

Small Screen Diplomacy

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ChinAfrica 2016年第12期8卷 52-53页

作者： Francois dubé

Cooperation in the TV and film industry helps better tell the Chinesestory in AfricaJACKIE Chan is globally renowned for his jump kicks and stunts,but during a promotional tour for his2015 film Dragon Blade,it was the kungfu master＇s linguistic skills that attracted *** a short online video,Chan greeted his fans using four of Nigeria＇s local languages,namely Pidgin,Yoruba,Hausa and lgbo,creating a huge buzz among his Nigerian followers.

关键词： Small Screen Diplomacy

Stepping up to the Podium

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ChinAfrica 2018年第2期10卷 28-29页

作者： Francois dubé

Young Change-Maker Samantha Miyanda wants to help Zambian girls fulfill their potential through sports

关键词： IOC Stepping up to the Podium

The World in Four Strings

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ChinAfrica 2017年第7期9卷 34-35页

作者： Fran?ois dubé

An instrumental soloist from Hangzhou tugs at Morocco’s heartstrings with her Chinese pipa ConCert performer Yu Lingling likes to point out that her hometown,Hangzhou,East China’s Zhejiang Province,was the star ting point of the ancient Silk Road,a corridor of intercivilizational *** if predestined by the place of her bir th,the ar tist took the ar t of cultural

关键词： World The World in Four Strings

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A Flawless Victory

Beijing Review 2017年第37期60卷 42-43页

作者： Fran?ois dubé

Sudanese student wins top prize and the audience＇s hearts in China＇s language proficiency competition It was a glorious evening for Mohammed Elmoiez,who was crowned the champion of the 16th ＂Chinese Bridge＂ Chinese Proficiency Competition for Foreign College Students on August 12 in Changsha,south China＇s Hunan *** made history as the first African participant to win the

关键词：大学生湖南省中国