How altitudinal gradient affects the diversity and composition of benthic insects in arid areas streams of northern East Algeria?

Benzina, Imène; Bachir, Abdelkrim Si; Ghazi, Cherif; Santoul, Frédéric; Céréghino, Régis

doi:10.2478/s11756-019-00326-8

Cited by 9 publications

(5 citation statements)

References 41 publications

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“…This is due to unalike fish species distribution and composition, which can be affected by environmental variables such as elevation, area of elevation band (Cruz-Elizalde et al, 2016), and productivity (Wright et al, 2003). Our study is also in agreement with studies of fish species in the eastern Europe (Askeyev et al, 2017), stream of Northen east Algeri (Benzina et al, 2019), Yangtze River basin (Fu et al, 2004), in the southern Appalachians (Robinson and Rand, 2005), in eastern Nepal Himalaya (Khatiwada et al, 2019), in Himalaya (Bhatt et al, 2012), and in the central Andes (Jaramillo-Villa et al, 2010), which have described that the diversity of aquatic fauna decreased gradually with altitude. The species richness or diversity in the uplands lessened significantly along the altitudinal gradient, which hints that the environmental factors of the high land or altitude might serve as a barrier to scatter and the colonization of adjacent drainage basins by lowland fishes (Pouilly et al, 2006;Jaramillo-Villa et al, 2010).…”

Section: Discussionsupporting

confidence: 90%

Fish community structure along altitudinal gradients with relation to environmental variables in Ratuwa River of Eastern, Nepal

et al. 2021

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Studies on fish community structure along altitudinal gradients of rivers are lacking in Nepal. This study was carried out to gauge the fish diversity and composition along elevational gradient in Ratuwa River. The altitudinal gradient varies between 70 m to 1300 m. Fish samples were collected based on habitat representativeness from April (spring) 10-18, July (summer) 10-18, October (autumn) 10-18, 2020 and January (winter) 10-18, 2021. A total of 3447 specimens representing 4 orders, 14 families and 36 species were identified. Both fish diversity and abundance of studied ichthyofauna vary with altitudinal gradient. The present study affirmed that fish species of Opsarius bendelisis, Schistura multifasciatus, Garra annandalei, Brachydanio rerio, Aspidoparia morar, and Schistura scaturigina are the major contributory species (>1%) for both space and time spectrums. Fish community structure testing for both to space and time showed significant difference in spatial spectrum (R=0.72, P<0.01) but no significant difference in temporal variation (R=-0.034, P>0.05). The present results hinted that fish assemblage structure varied significantly from low to high elevations, altitude, water temperature, water velocity, dissolved oxygen and pH was found as major influential factors (P<0.05) for species distribution.

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Section: Discussionsupporting

confidence: 90%

Fish community structure along altitudinal gradients with relation to environmental variables in Ratuwa River of Eastern, Nepal

et al. 2021

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“…The increase of family richness with increasing water temperature may be explained by the low family richness of high altitude streams with colder water temperature (Jacobsen, 2004) in our study. By contrast, other studies found an increase in family richness with altitude in Northwest Africa (Beauchard et al, 2003;Benzina et al, 2019), while abundance decreased (Benzina et al, 2019). In our dataset, we further saw a decrease of family richness in water temperatures exceeding around 20°C.…”

Section: Discussion Association Between Family Richness and Environmental Variablescontrasting

confidence: 90%

Environmental Change Threatens Freshwater Insect Communities in Northwest Africa: A Meta-Analysis

Kaczmarek

Schäfer

Berger

2021

Front. Environ. Sci.

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A climatic shift from temperate to arid conditions is predicted for Northwest Africa. Water temperature, salinity, and river intermittency are likely to increase, which may impact freshwater communities, ecosystem functioning, and related ecosystem services. Quantitative data and information on the impact of climate change on insect communities (e.g., richness, taxonomic and trait composition) are still scarce for Northwest Africa. In this study, we extracted information on freshwater insect occurrence and environmental variables in Northwest Africa from the results of a literature search to study potential consequences of changing climatic conditions for these communities. Our data set covered 96 families in 165 sites in Morocco and Algeria. We quantified the impact of several explanatoryvariables (climate, altitude, water temperature, conductivity, intermittency, flow, aridity, dams, and land cover) on richness, taxonomic and functional trait composition using negative binomial regression models and constrained ordination. Family richness in arid sites was on average 37 % lower than in temperate sites in association with flow, river regulation, cropland extent, conductivity, altitude, and water temperature. With 36 % of the studied temperate sites predicted to turn arid by the end of the century, a loss of insect families can be predicted for Northwest Africa, mainly affecting species adapted to temperate environments. Resistance and resilience traits such as small body size, aerial dispersal, and air breathing promote survival in arid climates. Future research should report insect occurrences on species level to allow for better predictions on climate change effects.

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“…The results of our study also indicated that S.damnosum. larvae were abundant in habitats with riparian forest cover which might be due to the availability of plant leaves as a source of food and shelter [75][76][77][78].…”

Section: Plos Onementioning

confidence: 99%

Habitat preference of blackflies in Omo Gibe river basin (southwest Ethiopia): Implications for onchocerciasis elimination and control

et al. 2022

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Ecological control of blackflies (Simulium damnosum) can be an alternative or additional tool to enhance onchocerciasis elimination efforts. However, limited research is conducted on the ecology of blackflies in Ethiopia. In this study, we determined the habitat preference of blackfly larvae and their relationship with aquatic macroinvertebrate predators in the Omo Gibe river basin of southwest Ethiopia. Environmental and biological data were collected from 150 sampling sites during both dry and wet seasons in 2019. Generalized Linear Models (GLMs) were used to identify factors affecting the occurrence and abundance of S. damnosum larvae. Canonical Correspondence Analysis (CCA) was used to investigate the relationship between environmental and biological variables and the abundance of S. damnosum larvae. The findings of this study indicated the abundance of S. damnosum larvae increased with increasing turbidity, alkalinity and altitude, but decreased with increasing concentrations of five-day Biological Oxygen Demand (BOD5), orthophosphate and magnesium ion. Both the presence and abundance of S. damnosum larvae decreased with the increasing abundance of stonefly larvae (Perlidae). Simulium damnosum larvae were found less likely in the presence of mayfly larvae (Baetidae) and were less abundant where Chironomidae are abundant. In conclusion, the findings of this study showed that the habitat preference of S. damnosum larvae is determined by environmental factors and that the presence and abundance of the larvae are affected by macroinvertebrate predators. It is essential to establish buffer zones as a part of watershed management to retain pollutants and prevent them from entering directly into water courses to improve water quality and the assemblages of macroinvertebrate predators and enhance biocontrol of blackflies.

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How altitudinal gradient affects the diversity and composition of benthic insects in arid areas streams of northern East Algeria?

Cited by 9 publications

References 41 publications

Fish community structure along altitudinal gradients with relation to environmental variables in Ratuwa River of Eastern, Nepal

Fish community structure along altitudinal gradients with relation to environmental variables in Ratuwa River of Eastern, Nepal

Environmental Change Threatens Freshwater Insect Communities in Northwest Africa: A Meta-Analysis

Habitat preference of blackflies in Omo Gibe river basin (southwest Ethiopia): Implications for onchocerciasis elimination and control

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