scholarly journals Investigating the prevalence of Bark beetles of Pinus halepensis in the North East semi-arid region of Algeria

2021 ◽  
Vol 22 (7) ◽  
Author(s):  
Lyès Moumeni ◽  
AMANDINE GASTEBOIS ◽  
LOUIZA GILLMANN ◽  
NICOLAS PAPON ◽  
FARIDA BENIA ◽  
...  
Keyword(s):  
Arid Region ◽  
Bark Beetles ◽  
Pinus Halepensis ◽  
Aleppo Pine ◽  
Prevention Measures ◽  
North East ◽  
The North ◽  
Pine Trees ◽  
Semi Arid Region ◽  
Semi Arid

Abstract. Moumeni L, Gastebois A, Gillmann L, Papon N, Benia F, Bouchara J-P, Bounechada M. 2021. Investigating the prevalence of Bark beetles of Pinus halepensis in the North East semi-arid region of Algeria. Biodiversitas 22: 2755-2762. Aleppo pine is the most common tree in the semi-arid forests of Algeria. Despite its high resistance to drought and adaptability to all types of soils, the effects of climate change are affecting it directly and indirectly. Stressed trees indeed are subject to bark beetle attacks. In this study, we sampled the bark beetles directly from the affected pine trees. Six species belonging to the Scolytinae subfamily were identified. Tomicus detruens and Orthotomicus erosus were widely spread and present in the three studied forests, where they were found to colonize living trees while Crypturgus numidicus, Crypturgus mediterraneus, Hylurgus ligniperda and Hylurgus micklitzi colonized only dead trees. Together with future identification of the microfungi associated with these xylophagous insects, these data may help to define prevention measures to fight the decline of Aleppo pine forests observed in some parts of Eastern Algeria.

THE NORMALIZED DIFFERENCE VEGETATION INDEX AS AN INDICATOR OF DYNAMICS

2021 ◽  
Author(s):  
Haddad Amar ◽  
Beldjazia Amina ◽  
Kadi Zahia ◽  
Redjaimia Lilia ◽  
Rached-Kanouni Malika
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Climatic Factors ◽  
Mediterranean Ecosystems ◽  
Point Of View ◽  
Aleppo Pine ◽  
Landsat 8 ◽  
North East ◽  
The North ◽  
Pine Trees

Mediterranean ecosystems are considered particularly sensitive to climate change. Any change in climatic factors affects the structure and functioning of these ecosystems and has an influence on plant productivity. The main objective of this work is to characterize one of the Mediterranean ecosystems; the Chettaba forest massif (located in the North-East of Algeria) from a vegetation point of view and their link with monthly variations using Landsat 8 satellite images from five different dates (June 25, 2017, July 27, 2017, August 28, 2017, October 15, 2017). The comparison of NDVI values in Aleppo pine trees was performed using analysis of variance and the use of Friedman's non-parametric test. The Mann-Kendall statistical method was applied to the monthly distribution of NDVI values to detect any trends in the data over the study period. The statistical results of NDVI of Aleppo pine trees indicate that the maximum value is recorded in the month of June, while the lowest values are observed in the month of August where the species studied is exposed to periods of thermal stress.

Predominance of Burkholderia cenocepacia lineages causing onion sour skin in the semi‐arid region of north‐east Brazil

2020 ◽  
Author(s):  
Ana D. B. Baia ◽  
Adriano M. F. Silva ◽  
Bárbara G. Ribeiro ◽  
Claudeana C. Souza ◽  
Wilson J. Silva Júnior ◽  
...  
Keyword(s):  
Arid Region ◽  
Burkholderia Cenocepacia ◽  
North East ◽  
Semi Arid Region ◽  
Sour Skin ◽  
Semi Arid

scholarly journals Le « Sertão » du « Nordeste » (Brésil). Essai de définition d’un « pays ».

2005 ◽  
Vol 2 (4) ◽  
pp. 241-248
Author(s):  
Louis-Edmond Hamelin
Keyword(s):  
Arid Region ◽  
Rio Grande ◽  
Triangular Shape ◽  
The North ◽  
Standards Of Living ◽  
Its Regions ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Original Type ◽  
Hydrographic Network

Despite the fact that Brazil is a young and vast country, some of its regions have already acquired a personality of their own. The Sertâo in the Northeast is such a case. Of triangular shape, the Sertâo opens in the North, towards the Atlantic ocean ; it covers 10% of the total area of Brazil and include more than 90% of the states of Rio Grande do Norte, Ceara and Paraiba. It is a semi arid region with a dry climate, chiefly responsible for an original type of vegetation : the caatinga. The fundamental features of the relief are horizontal with depressions and inselbergs. The rare good soils are deteriorated and the hydrographic network is fair. Such a severe country is inhabitated by 7 millions persons of mixed ethnic origins. The dominant occupational types, are the vaqueiro, the garimpeiro, the truck driver , and, during the dry season, the flagellado. It is an « under-developped » country economically , with low standards of living, and a production based on food and cattle. If the Sertao is unsafe foreigners, it remains for the natives, a mystical and attractive country that may become more prosperous with the hydro-electric development of the Sao Francisco River.

Sulzbacheromyces caatingae: notes on its systematics, morphology and distribution based on ITS barcoding sequences

2016 ◽  
Vol 48 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Marcelo A. SULZBACHER ◽  
Felipe WARTCHOW ◽  
Clark L. OVREBO ◽  
Julieth O. SOUSA ◽  
Iuri G. BASEIA ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Maximum Likelihood ◽  
Arid Region ◽  
Additional Data ◽  
The North ◽  
North Eastern ◽  
Initial Discovery ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Its Barcoding

AbstractSulzbacheromyces is a recently erected genus in Lepidostromatales, differing from Lepidostroma in the crustose thallus. After the initial discovery of S. caatingae, the only species to be found in Brazil so far, a large quantity of additional data and ITS barcoding sequences for this taxon from a much broader geographical range and different habitats was collected. Phylogenetic analysis under a maximum likelihood framework demonstrated that all specimens are genetically uniform, showing no variation in their ITS, suggesting that S. caatingae has a wide ecological amplitude beyond the Brazilian Caatinga and Atlantic Forest biomes. Detailed descriptions and illustrations of the species are presented, including a map showing the distribution of S. caatingae in the Brazilian semi-arid region and the north-eastern Atlantic rainforest.

scholarly journals Broiler breeder hen performance and egg hatchability during rainy season in Brazilian semi-arid region

2014 ◽  
Vol 34 (3) ◽  
pp. 385-394
Author(s):  
Dermeval A. Furtado ◽  
Laura D. C. A. Tota ◽  
José W. B. Nascimento ◽  
Mércia C. da C. Guimarães ◽  
José P. Lopes Neto
Keyword(s):  
Thermal Comfort ◽  
Arid Region ◽  
Sound Pressure ◽  
Co2 Concentration ◽  
Climatic Data ◽  
Broiler Breeder ◽  
Egg Hatchability ◽  
North East ◽  
Semi Arid Region ◽  
Semi Arid

Henhouse thermal comfort and bird age influence broiler breeder hen productivity; this way, the present research aimed to assess thermal comfort indexes and broiler breeder hen performance during winter in North East semi-arid region from Brazil, using a Cobb Avian 48 broiler strain at the age of 38 and 50 weeks. We measured the following bioclimatic indexes: air temperature and relative humidity, black globe temperature and humidity, CO2 concentration and sound pressure levels at henhouse facility. Data analysis design was complete randomized in a 3 x 3 factorial scheme with three treatments (months) and three replications (week number of collection by month). A number of 25 climatic data were observed. Bioclimatic indexes at the most warm hours throughout the day promoted bird discomfort yet sound pressure and carbon dioxide levels were under the Brazilian standards. Even in thermal comfort zone at some hours, the productivity indexes were in compliance with those recommended by the strain creation guidebook.

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