scholarly journals The synanthropic Common Moorhen (Gallinula chloropus) in North Africa: The Impact of habitat degradation on breeding performances

2021 ◽  
pp. 15-23
Author(s):  
Awatif Talbi ◽  
Laïd Touati ◽  
Mohammed Athamnia ◽  
Farrah Samraoui ◽  
Corrado Battisti ◽  
...  
Keyword(s):  
North Africa ◽  
Habitat Degradation ◽  
Anthropogenic Activities ◽  
Land Conversion ◽  
Breeding Performance ◽  
Dry Land ◽  
North Eastern ◽  
The Common ◽  
Eastern Algeria ◽  
The Impact

We carried out a study on dynamics of the Common Moorhen, Gallinula chloropus, a synanthropic rallid (Aves, Gruiformes), to elucidate the adverse effects this species has possibly suffered from the markedly increased habitat degradation that has been taking place over the last decades at Boussedra Pond, north-eastern Algeria. During the period 2015–2018, this wetland-related species showed an annual 35.4% decrease in its numbers, and the number of breeding pairs, which was monitored between 2008 and 2018, experienced an annual drop of 4.9%. The clutch size, a key determinant of breeding performance, averaged 4.7 ± 1.0 eggs (N = 26 clutches) in 2018 and was significantly lower than those reported in previous studies. As a result of anthropogenic activities, the size of the marsh decreased by more than 50% over the 1984–2018 period. The long-lasting shrinkage of this relict wetland was accompanied by the expansion of built-up areas (>50%) and cultivated plots, and, also, by a marked reduction in natural both wet- and dry-land habitats in its vicinity. We suggest that the decrease in the population trend and the breeding performance of the Common Moorhen could be indicative of the species stress response to the long-lasting land conversion, pressuring the relict habitat of Boussedra Pond.

Chasing the phantom: biogeography and conservation of Vipera latastei-monticola in the Maghreb (North Africa)

2018 ◽  
Vol 39 (2) ◽  
pp. 145-161 ◽  
Author(s):  
Inês Freitas ◽  
Soumia Fahd ◽  
Guillermo Velo-Antón ◽  
Fernando Martínez-Freiría
Keyword(s):  
North Africa ◽  
Habitat Degradation ◽  
Conservation Status ◽  
Western Mediterranean ◽  
Niche Modelling ◽  
Habitat Transformation ◽  
Mountain Ranges ◽  
Management Actions ◽  
Suitable Space ◽  
The Impact

Abstract The Maghreb region (North Africa) constitutes a major component of the Mediterranean Basin biodiversity hotspot. During the last centuries, a consistent human population growth has led to an unprecedented rate of habitat transformation and loss in the region and thus, threatening its biodiversity. The Western Mediterranean viper Vipera latastei-monticola inhabits humid and subhumid areas in the main mountain ranges of the Maghreb, facing such threatening factors; however, its elusive character and rarity hindered data collection for distinct biological purposes. Here, we study the biogeographical patterns and conservation status of the Maghrebian V. latastei-monticola resulting from recent sampling campaigns in Morocco and Tunisia. We update species distribution, and integrate phylogeographic and ecological niche modelling analyses at both species and lineage level to identify suitable areas, and to evaluate the impact of anthropogenic transformation and level of protection of their suitable space. We identified four highly divergent mitochondrial lineages, including a new lineage endemic to the Western High Atlas, with allopatric distributions and restricted to mountain ranges, supporting the role of mountains as past climatic refugia. Despite the remoteness of suitable areas, we report widespread habitat degradation and identify the low effectiveness of the current protected areas system in preserving the species and lineages range. Our study shows the urgent need to apply management actions for the long-term conservation of this vulnerable species and suggests a revaluation of the specific status of V. monticola, as these populations likely represent an ecotype of V. latastei.

scholarly journals Age, size and body condition do not equally reflect population response to habitat change in the common spadefoot toad Pelobates fuscus

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11678
Author(s):  
Dan Cogălniceanu ◽  
Florina Stănescu ◽  
Diana Székely ◽  
Theodor-Sebastian Topliceanu ◽  
Ruben Iosif ◽  
...  
Keyword(s):  
Body Condition ◽  
Urban Areas ◽  
Habitat Degradation ◽  
Spadefoot Toad ◽  
Pelobates Fuscus ◽  
Median Lifespan ◽  
Terrestrial Habitats ◽  
The Common ◽  
The Impact ◽  
Physical Expansion

Urbanization impacts biodiversity both directly through physical expansion over land, and indirectly due to land use conversion and human behaviors associated with urban areas. We assessed the response of a common spadefoot toad population (Pelobates fuscus) to habitat loss and fragmentation resulting from urban development by studying changes in size, body condition and age parameters. We compared samples collected in the early 2000s (sample A) and later on during 2012–2014 (sample B). The terrestrial habitats in the study area were severely reduced and fragmented due to the expansion of the human settlement. We found no significant differences in the age parameters between the two sampling periods; the median lifespan shortened from 3.5 (sample A) to 3.0 years (sample B), while the other age parameters were similar in both samples. In contrast, snout-vent length, body mass and body condition experienced a significant decrease over time. Our results suggest that changes in body size and body condition, rather than age parameters, better reflect the response of the common spadefoot toad population to declining habitat quality. Therefore, body measurements can provide reliable estimates of the impact of habitat degradation in amphibian populations.

scholarly journals The Impact of Commercial Mutations on Historical Buildings in Algeria: Case of Colonial Quarters in The City of Annaba

2021 ◽  
Author(s):  
Mounira Mihoubi ◽  
Keyword(s):  
Residential Buildings ◽  
Tenth Century ◽  
Architectural Heritage ◽  
Left Behind ◽  
Commercial Activities ◽  
North Eastern ◽  
Social And Economic Development ◽  
Eastern Algeria ◽  
The Impact ◽  
The City

The commercial dynamics that the city of Annaba has experienced in recent decades, due to social and economic development and market liberalization, have changed its urban and architectural heritage. This city, located in north-eastern Algeria and created before the tenth century, has seen many civilizations and dynasties pass by. Every civilization has left behind traces that time has sometimes taken care of protecting them, to bequeath us or erasing them completely. This heritage wealth testifying and telling the story of our ancestors' past, unfortunately, began to lose its value and originality after the transformations and modifications that took place in the old residential buildings inherited from two opposing cultures by integrating new forms of commercial activities. The objective of this communication is to analyse and measure the evolution of these mutations, with a focus on the ancient colonial areas of the city of Annaba where the phenomenon is most pronounced.

scholarly journals RELATIONSHIP BETWEEN RETAINED PLACENTA AND BODY CONDITION CHANGES DURING THE TRANSITION PERIOD IN HOLSTEIN DAIRY COWS IN NORTH-EASTERN ALGERIA

SPERMOVA ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 17-23
Author(s):  
Ahmed Hadef ◽  
◽  
Kamel Miroud ◽  
Hocine Sebihi
Keyword(s):  
Dairy Cows ◽  
Body Fat ◽  
Body Condition ◽  
Transition Period ◽  
The Body ◽  
Retained Placenta ◽  
North Eastern ◽  
Eastern Algeria ◽  
The Impact ◽  
Holstein Dairy Cows

Retained placenta (RP) is a common complication of bovine parturition. It is a multifactorial reproductive disorder that predisposes to infection and hence, to infertility. The impact of body condition changes during the transition period on the risk of RP appearance was evaluated in 12 Holstein dairy cows calving from October to January in north-eastern Algeria. The animals were body condition scored (BCS) 3 weeks antepartum and two weeks postpartum to assess the peripartum body fat loss (BCS loss). The statistical analysis involving variables related to BCS and parity was performed using the principal component analysis (PCA). An RP critical occurrence of 41.66% exceeding significantly the threshold prevalence of 10% (p<0.05) was recorded. This could be related to the BCS loss that exceeded one unit over the transition period (r=0.84, p<0.01), expressing the high body fat mobilisation in response to stressor factors such as negative energy balance, feed availability and climatic condition. Scoring the body condition, particularly around the peripartum, may serve as a tool to monitor the risk factors related to the energetic status of dairy cows.

scholarly journals Dynamic simulation for wastewater treatment plants management: Case of Souk-Ahras region, north-eastern Algeria

2017 ◽  
Vol 34 (1) ◽  
pp. 221-231 ◽  
Author(s):  
Dairi Sabri ◽  
Djebbar Yassine ◽  
Hammar Yahia ◽  
Mrad Dounia
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Operating Conditions ◽  
Ultimate Capacity ◽  
Decision Tool ◽  
Management Scenarios ◽  
North Eastern ◽  
Eastern Algeria ◽  
The Impact ◽  
Activated Sludge Systems

AbstractTreatment performances of two wastewater treatment plants (WWTPs), located in North-Eastern Algeria (Souk-Ahras and Sedrata) were tested using ASM1 model. The model, to be considered as a decision tool for the appropriate management of activated sludge systems, served for the prediction of both WWTP behaviours under different operating conditions. In Sedrata WWTP the first management scenarios is based on an increase of inflow rate, taking into account a new transfer volume from a nearby zone. In a second scenerio, the ultimate flow of 40 000 m3·d-1 is estimated. Regarding Souk-Ahras WWTP, three scenarios were tested. The first tested the impact of an increase of the extraction flow rate and yielded a reduction by 37% of sludge production. The second dealt with the management of the mass budget of substrata and biomass. Finally, the third application was devoted to the estimation of the plant ultimate capacity, estimated to be 60 000 m3·d-1.

scholarly journals The Impact of The Land-Use Changes on The Water Carrying Capacity in Kajen, Indonesia: A Spatial Analysis

2021 ◽  
Vol 887 (1) ◽  
pp. 012018
Author(s):  
A. Pugara ◽  
B. Pradana ◽  
D. A. Puspasari
Keyword(s):  
Land Use ◽  
Spatial Analysis ◽  
Carrying Capacity ◽  
Agricultural Land ◽  
Land Use Changes ◽  
Development Planning ◽  
Land Conversion ◽  
Planning Period ◽  
Dry Land ◽  
The Impact

Abstract Kajen Sub-District is the Capital of the Pekalongan Regency. This area is the center of activity that grows to be the urban area with trading and services as the economic pole. The trading and services activity is escalating inherent with the existence of IAIN and UNDIP campuses. The new campus increasing the need for a dormitory or housing and facilities area. Its result of land conversion in vegetation and agriculture. This spatial and development planning above contain in the Pekalongan Regency spatial document years 2020 – 2040. According to that document, the built-up area is predicted to be 50 % growth by the end of the planning period. The study regarding the influence of the land-use changes on the water carrying capacity in Kajen is conducted with the deductive–quantitative method. The deductive is begin to form theoretical synthesis about the themes and then search the empirical fact to compare. The quantitative approach means the data of the study is can be count rationally. The analysis tools of the study are spatial analysis and correlation. The study aims to examine the influence of the land-use change on the water carrying capacity and the most significant land use which influences it. The result of the study it the most influencing land use in water carrying capacity is a settlement with an 8.7-point level of correlation. The settlement appears from the agricultural land conversion, especially dry land and paddy field.

Pengaruh Konversi Lahan terhadap Strategi Pemanfaatan Modal Nafkah Rumah Tangga Buruh Tani

2020 ◽  
Vol 4 (3) ◽  
pp. 407
Author(s):  
Hesti Prastiwi ◽  
Martua Sihaloho
Keyword(s):  
Qualitative Data ◽  
Rice Fields ◽  
Livelihood Strategies ◽  
Quantitative Approach ◽  
Survey Method ◽  
Land Conversion ◽  
Literature Study ◽  
Irrigated Rice ◽  
Sustainable Food ◽  
The Impact

Lahan merupakan salah satu sumber daya agraria yang sangat penting bagi petani dikarenakan lahan merupakan salah satu sumber untuk bertahan hidup. Sesuai dengan Undang-Undang Dasar Nomor 41 Tahun 2009 tentang Perlindungan Lahan Pertanian Pangan Berkelanjutan. Pembangunan yang terjadi di Indonesia semakin masif, menimbulkan konversi lahan bersifat permanen ketika lahan sawah beririgasi berubah menjadi kawasan pemukiman atau industri. Konversi lahan yang terjadi menyebabkan hilangnya beberapa atau seluruh modal nafkah yang ada. Perubahan modal nafkah ini akan mengakibatkan perubahan strategi nafkah petani. Penelitian ini bertujuan untuk menganalisis dampak konversi lahan terhadap strategi nafkah dan pengaruh pemanfaatan  modal nafkah  terhadap strategi nafkah rumah tangga. Lokasi penelitian ini yaitu Desa Pasirgaok, Kecamatan Rancabungur, Kabupaten Bogor. Metode yang digunakan untuk menggali fakta, data, dan informasi dalam penelitian adalah pendekatan kuantitatif melalui metode survei dengan kuesioner yang didukung oleh data kualitatif melalui wawancara dan studi literatur hingga diperoleh hasil bahwa dampak konversi lahan mempengaruhi modal dan strategi nafkah.Kata Kunci: buruh tani, konversi lahan, modal nafkah, strategi nafkah=====ABSTRACTLand is one of the most important agrarian resources for farmers because land is one source of livelihood survival. According to Constitution Number 41 Year 2009 on concerning The Protection of Sustainable Food Agriculture. The development that is taking place in Indonesia is increasingly massive leading to permanent land conversion when technical irrigated rice fields change into residential or industrial areas. The land conversion that occurs causes a loss of some or all existing livelihood asset. This change in livelihood asset will result in a change in farmers livelihood strategies. This study aims to analyze the influence of the impact of land conversion towards livelihood strategies and the influence of the utilization of livelihood asset towards the livelihood strategies households. The location of this research is Pasirgaok Village, Rancabungur District, Bogor Regency. The method used to extract facts, data, and information in the research is the quantitative approach through survey method with questionnaires supported by qualitative data through interview and literature study until it is obtained that the impact of land conversion towards landless farmer household’s assets and livelihood strategies.Keywords: land conversion, landless farmer, livelihood asset, livelihood strategies

Ground beetles (Coleoptera: Carabidae) assemblages in two agricultural landscapes in North-Eastern Algeria

2014 ◽  
Vol 40 (2) ◽  
pp. 5-16 ◽  
Author(s):  
Yasmina Saouache ◽  
Salaheddine Doumandji ◽  
Nadia Ouchtati
Keyword(s):  
Ground Beetles ◽  
Agricultural Landscapes ◽  
North Eastern ◽  
Eastern Algeria
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