Metal Content and Community Structure of Cryptogam Bioindicators in relation to Vehicular Traffic in Montseny Biosphere Reserve (Catalonia, Spain)

1995 ◽  
Vol 27 (04) ◽  
pp. 291 ◽  
Author(s):  
M. G. Glenn ◽  
A. Gomez-Bolea ◽  
R. Lobello
Keyword(s):  
Community Structure ◽  
Metal Content ◽  
Biosphere Reserve ◽  
Vehicular Traffic

Metal Content and Community Structure of Cryptogam Bioindicators in relation to Vehicular Traffic in Montseny Biosphere Reserve (Catalonia, Spain)

1995 ◽  
Vol 27 (4) ◽  
pp. 291-304 ◽  
Author(s):  
M. G. Glenn ◽  
A. Gomez-Bolea ◽  
R. Lobello
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Metal Content ◽  
Quercus Ilex ◽  
Biosphere Reserve ◽  
Control Site ◽  
Airborne Particles ◽  
Vehicular Traffic ◽  
Fungal Parasites

AbstractThe health, abundance, metal content and species richness of corticolous macrolichens and bryophytes of Quercus ilex were compared at nine roadside stations in Montseny Biosphere Reserve, 40 km NNE of Barcelona, and at a control site outside the industrial metropolis. Stations were characterized by traffic levels and the correlated parameter airborne particles. Corticolous flora at all stations was dominated by sorediate Parmelia species (P. caperata, P. soredians, P. subrudecta, P. subaurifera, P. sulcata and P. perlata). Damage, mainly due to arthropod feeding and fungal parasites, ranged from 14 to 33% of mean cover per station in the park and was 10% at the control site. Elevated levels of Pb, Zn and Cu were found in large thalli near the roadsides.

Richness, Community Structure, and Diurnal Activity of Species of Ants along a Disturbance Gradient at El Cielo Biosphere Reserve, Tamaulipas, Mexico

2018 ◽  
Vol 43 (4) ◽  
pp. 919-938 ◽  
Author(s):  
Itzel Rubí Rodríguez-de León ◽  
Crystian Sadiel Venegas-Barrera ◽  
Miguel Vásquez-Bolaños ◽  
Alfonso Correa-Sandoval ◽  
Jorge Víctor Horta-Vega
Keyword(s):  
Community Structure ◽  
Biosphere Reserve ◽  
Diurnal Activity ◽  
Disturbance Gradient ◽  
El Cielo Biosphere Reserve

scholarly journals Assessing macroinvertebrate communities in relation to environmental variables: the case of Sambandou wetlands, Vhembe Biosphere Reserve

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Tatenda Dalu ◽  
Rivoningo Chauke
Keyword(s):  
Community Structure ◽  
Water Depth ◽  
Environmental Variables ◽  
Anthropogenic Activities ◽  
Biosphere Reserve ◽  
High Water ◽  
Macroinvertebrate Community ◽  
Macroinvertebrate Communities ◽  
Negative Effect ◽  
Macrophyte Cover

AbstractThe Vhembe Biosphere Reserve, South Africa, contains many wetlands that serve as wildlife habitats and provide vital ecosystem services. Some of the wetlands are continuously being degraded or destroyed by anthropogenic activities causing them to disappear at an alarming rate. Benthic macroinvertebrates are known as good water quality bioindicators and are used to assess aquatic ecosystem health. The current study investigated habitat quality using macroinvertebrate community structure and other biotic variables (i.e. phytoplankton, macrophytes) in relation to environmental variables in the Sambandou wetlands using canonical correspondence analysis (CCA). A total of fifteen macroinvertebrate families were identified over two seasons. The CCA highlighted seven variables, i.e. pH, phosphate concentration, temperature, ammonium, macrophyte cover, conductivity and water depth, which were significant in structuring macroinvertebrate community. Picophytoplankton and microphytoplankton concentrations decreased from winter to summer, whereas nanophytoplankton concentration increased from winter to summer. Thus, the dominance of small-sized phytoplankton indicated nutrient limitation and decreased productivity, whereas winter sites 2 and 3 were dominated by large-celled phytoplankton, highlighting increased productivity. Winter sites were mostly negatively associated with CCA axis 1 and were characterised by high temperature, phosphate and ammonium concentrations, macrophyte cover, pH and conductivity. Summer sites were positively associated with axis 1, being characterised by high water depth and pH levels. The results obtained highlighted that agricultural activities such as cattle grazing and crop farming and sand mining/poaching had a negative effect on macroinvertebrate community structure.

scholarly journals Changes in nocturnal insect communities in forest-dominated landscape relevant to artificial light intensity

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Lee Hakbong ◽  
Cho Yong-Chan ◽  
Jung Sang-Woo ◽  
Kim Yoon-Ho ◽  
Lee Seung-Gyu
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Light Intensity ◽  
Biosphere Reserve ◽  
Mean Annual Temperature ◽  
Insect Diversity ◽  
Artificial Light ◽  
Insect Community ◽  
Light At Night ◽  
Urban Sites

Abstract Background Artificial light at night has recently been identified as a major factor adversely affecting global insect diversity. Here, we compared the insect diversity in Gwangneung Forest Biosphere Reserve, specifically in the Korea National Arboretum (with no artificial light at night), with that of three nearby urban sites with a gradient of artificial light at night (five locations at each site). We analyzed the effects of the artificial night lighting index, mean annual temperature, and field light intensity (lux) at night on the insect community structure. Results The urban sites generally exhibited higher species richness and abundance as well as clear indicator species compared with the control site. The size distribution of the collected insects markedly differed between the control and the three urban sites. The abundance of herbivorous and omnivorous insects increased and decreased, respectively, with the increase in light intensity. Species richness of herbivorous and omnivorous insects was likely correlated with the field light intensity at night and artificial night lighting index, respectively. Conclusions This study demonstrates the association between nighttime environment and marked changes in insect community structure and revealed consequent transition of ecosystem services by changes in trophic group composition.

scholarly journals Effect of the recent land use on the plant diversity and community structure of Omayed Biosphere Reserve, Egypt

2015 ◽  
Vol 4 ◽  
pp. 26-37 ◽  
Author(s):  
Dalia A. Ahmed ◽  
Manal Fawzy ◽  
Nouran M. Saeed ◽  
Mohamed A. Awad
Keyword(s):  
Land Use ◽  
Community Structure ◽  
Plant Diversity ◽  
Biosphere Reserve

scholarly journals Heavy Metal Content and Physico-Chemical Analyses of Soils under the Litter of some Medicinal Taxa in the Luki Biosphere Reserve, Democratic Republic of the Congo

2021 ◽  
pp. 19-35
Author(s):  
Florent Biduaya Mukeba ◽  
Myriam Mukadi Ngondo ◽  
Nazaire Kabemba Kadima ◽  
Prince Bofati Ilonga ◽  
Patrick Kayembe Bibasuya ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Organic Matter ◽  
Metal Content ◽  
Organic Matter Content ◽  
Biosphere Reserve ◽  
Matter Content ◽  
Heavy Metal Content ◽  
Significant Difference ◽  
Canadian Council ◽  
Cadmium Lead

Aim: The aim of this study was to compare the texture, mineral element and heavy metal content of the soil under the litter of different selected species in relation to the plan of their pedogenesis. Methods: The granulometric analysis of the various samples based on laser diffraction, measurements of Total Nitrogen and Total Organic Carbon were performed using the Elemental Analyzer, the Organic Matter content is estimated by the loss of ignition method using a Salvis furnace, In order to estimate the CaCO3 content. The same samples were heated in the oven at 1000°C for 60 minutes and reweighed. The carbonate content is estimated by the loss in mass during this second firing, multiplied by 2.274 which is the molecular weight ratio between CaCO3 and CO2. The heavy metal and mineral composition was evaluated by ICP-AES and AAS. Results: The granulometric analyses show a sandy texture, according to the FAO classification. The organic matter content thus observed in the soils under the litter of these four species did not show any significant difference. The concentration of major mineral elements recorded in soils under the litter of Blighia welwitchii, Oncoba welwitschii, Zanthoxylum gilletii and Harungana madagascariensis did not show any significant difference. However, potassium, phosphorus, and magnesium have a high concentration compared to calcium and sodium. This study showed that the levels of cadmium, lead, arsenic and aluminum in the various samples of litter soils of all plant species including nickel for B. welwitschii are above the standards set by the Canadian Council of Ministers of the Environment for soil quality. Pollution factors for aluminum are the highest. This indicates that aluminum is the most polluting metal. The low pollution factors for lead and nickel are due to the low fixation of these metals by soils. Conclusions: Our study took place in the Luki Biosphere reserve and showed that the different soils under litter are polluted by very toxic and persistent heavy metals such as cadmium, lead, aluminum, arsenic and nickel. This study has revealed new aspects of heavy metal pollution. This pollution represents a serious threat to the environment in general and to humans in particular through the food chain.

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