scholarly journals Vulnerability of African Rosewood (Pterocarpus erinaceus, Fabaceae) natural stands to climate change and implications for silviculture in West Africa

Heliyon ◽  
2020 ◽  
Vol 6 (6) ◽  
pp. e04031
Author(s):  
Kossi Adjonou ◽  
Komla Elikplim Abotsi ◽  
Kossi Novinyo Segla ◽  
Habou Rabiou ◽  
Towanou Houetchegnon ◽  
...  
Keyword(s):  
Climate Change ◽  
West Africa ◽  
Pterocarpus Erinaceus ◽  
Natural Stands

scholarly journals Effect of nursery substrate on the growth of Pterocarpus erinaceus Poir. seedlings

2021 ◽  
Vol 8 (9) ◽  
pp. 17-27
Author(s):  
ALABA Pyoabalo ◽  
Atti TCHABI ◽  
Komla Elikplim ABOTSI ◽  
Kossi ADJONOU ◽  
Kossi Novinyo SEGLA ◽  
...  
Keyword(s):  
West Africa ◽  
Soil Microorganisms ◽  
High Pressures ◽  
Production Constraints ◽  
Pterocarpus Erinaceus ◽  
Number Of Leaves ◽  
The Mean ◽  
Negative Impacts ◽  
Natural Stands ◽  
Positive Effect

The high pressures on Pterocarpus erinaceus Poir. severely affect its natural stands in West Africa. The measures taken to reverse this trend are still inefficient due to plantlets production constraints. This study aims to understand the importance of growing substrates on seedlings growth in nursery. Composite soil samples were collected at 20 cm depth from 4 seed trees in 5 different sites in Togo (West Africa). Two batches were made for each site, one of which was sterilized by autoclave and the other has received no treatment. Three growing parameters (length of stem, number of buds and number of leaves) of the plantlets obtained from sterilized seeds were measured during 20 weeks in the nursery. Results show for each site a significantly better growing rate of seedlings on unsterilized substrates, compared to sterilized substrates. At the end of the experiment, plantlets were 8.75 ± 2.32 cm mean height on sterilized substrates when they reach 19.20 ± 5.00 cm on unsterilized substrates. The mean number of buds and leaves per plantlet varies from 2.23 ± 1.71 buds and 3.00 ± 1.86 leaves to 10.73 ± 3.28 buds and 11.09 ± 2.48 leaves at the same date, respectively on sterilized and unsterilized substrates. The low growing rate on sterilized substrates should be linked to the low capacity of plantlets in mobilizing phosphorus, potassium and nitrogen without microorganisms. Negative impacts of sterilization were highlighted on seedlings by necrosis of buds and leaves from the 7th week of growth, demonstrating a positive effect of soil microorganisms on the proper development of the seedlings.

Climate change and food security in tropical West Africa – a dynamic-statistical modelling approach

Erdkunde ◽  
2008 ◽  
Vol 62 (2) ◽  
pp. 101-115 ◽  
Author(s):  
Heiko Paeth ◽  
Arcade Capo-Chichi ◽  
Wilfried Endlicher
Keyword(s):  
Climate Change ◽  
Food Security ◽  
West Africa ◽  
Statistical Modelling ◽  
Modelling Approach

scholarly journals Climate change impact on streamflow in a tropical basin of Ghana, West Africa

2021 ◽  
Vol 34 ◽  
pp. 100805
Author(s):  
Alfred Awotwi ◽  
Thompson Annor ◽  
Geophrey K. Anornu ◽  
Jonathan Arthur Quaye-Ballard ◽  
Jacob Agyekum ◽  
...  
Keyword(s):  
Climate Change ◽  
West Africa ◽  
Climate Change Impact ◽  
Change Impact

scholarly journals Perception and Adaptation Strategies of Dairy Farmers Towards Climate Variability and Change in West Africa

2021 ◽  
Author(s):  
Marthe Montcho ◽  
Elie Antoine Padonou ◽  
Marlise Montcho ◽  
Meshack Nzesei Mutua ◽  
Brice Sinsin
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
West Africa ◽  
Milk Production ◽  
Adaptation Strategies ◽  
Dairy Production ◽  
Climate Variability And Change ◽  
Dairy Farmers ◽  
Climate Zones ◽  
Fodder Production

Abstract In West Africa, dairy production plays a vital role in the economy and the wellbeing of the population. Currently, dairy production has become vulnerable due to climate variability. The main objective of this study was to investigate dairy farmers’ perceptions and adaptation strategies towards climate change in West Africa. Individual interview and Focus Group Discussions were conducted among 900 dairy farmers. Descriptive statistics and Chi-square test were used to assess dairy farmers’ perception on climate change. Multiple Correspondence Analysis and hierarchical clustering on principal component analysis were used to access the adaptation strategies of dairy farmers. The results revealed that dairy farmers perceived a decrease in the rainy season and the annual rainfall but an increase of the dry season and the annual temperature that affect their activities. Dairy farmers that fed the cattle mainly with natural pastures, crops residues and agroindustrial by-products in the climate zones of Benin, Burkina Faso and Niger, used as climate change adaptation strategies, transhumance in wetland, animal manure to improve fodder production and quality; plants to improve milk production, milk conservation and to treat animal diseases. They sold milk or produced local cheese with the remaining unsold milk. They use crops residues, mineral supplements, herd size reduction; water supply with community pastoral wells and dams, purchase water. Dairy farmers that mainly invested in fodder production and conservation in the climate zones of Mali, sold milk produced to dairies and cheese production units; used plants to improve milk production, pasteurization for milk conservation and veterinary service for animal care. This study provided relevant information for West African policymakers in designing appropriate policies and programs to assist dairy farmers to improve milk production under climate variability and change.

Population structure of Pterocarpus erinaceus Poir. across a protection gradient in Sudanian savannahs of Togo, West Africa

2018 ◽  
Vol 57 (1) ◽  
pp. 104-112 ◽  
Author(s):  
Tèkondo Banla ◽  
Thierry D. Houehanou ◽  
Merveille Koissi Savi ◽  
Rodrigue Idohou ◽  
Romain Glèlè Kakaï ◽  
...  
Keyword(s):  
Population Structure ◽  
West Africa ◽  
Pterocarpus Erinaceus

Analysis of extreme rains through climate indicators in the context of climate change in southern Benin

2021 ◽  
Vol 2 (1b) ◽  
pp. C20A01-1-C20A01-33
Author(s):  
Ferdinand Sourou HOUNVOU ◽  
◽  
K. F. Guedje ◽  
Hilaire Kougbeagbede ◽  
Adebiyi Joseph Adechinan ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
West Africa ◽  
Economic System ◽  
Entire Study Period ◽  
Entire Study ◽  
Climate Indicators ◽  
Large Growth ◽  
Southern Benin ◽  
Heavy Rains

The recurrence of flooding in recent years in West Africa is dramatically affecting the socio-economic system of most countries in the region. This work is devoted to the analysis of the heavy rains of its last years in the context of global warming in subequatorial Benin through eight rainfall indicators. For this purpose, the daily rains collected at seventeen stations in the south of Benin between 1960 and 2018, the maximum and minimum daily temperatures of the two synoptic stations in the study area between 1970 and 2018 are used. Analysis of the results shows a non-uniform trend in rainfall indicators over the entire study period. The monthly trend is in accordance with the bimodal rain regime of southern Benin for each of the climatic indicators studied. After the break in the downward trend in rainfall in the 1980s or 1990s at the various stations, the last three decades have been marked above all by ten-year averages of the various indicators that are higher than those obtained over the entire study period. Despite the low proportion of extreme rains, their frequency has increased since the resumption of rainfall in the 1980s or 1990s, especially compared to the 1970s and 1980s. The highest heights are observed for the most part in the towns close to the sea Atlantic Ocean. Global warming in southern Benin is characterized above all by high decadal temperature variation rates in the 1990s. This significant global warming in this pivotal decade is accompanied by relatively large growth in all indicators in southern Benin.

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