Journal of
Ecology and The Natural Environment

  • Abbreviation: J. Ecol. Nat. Environ.
  • Language: English
  • ISSN: 2006-9847
  • DOI: 10.5897/JENE
  • Start Year: 2009
  • Published Articles: 368

JENE Articles

Distribution, diversity and abundance of copepod zooplankton of Wular Lake, Kashmir Himalaya

February 2013

Wular Lake, the largest freshwater lake of India, plays a significant role in the hydrography of the Kashmir valley by acting as a huge absorption basin for floodwaters. Although rich in biodiversity, no published report is available on Copepoda diversity, distribution and abundance in such an important Ramsar Site of Kashmir Himalaya. Copepod samples, collected over a period of 12 months from September 2010 to...

Author(s): Javaid Ahmad Shah, Ashok K. Pandit and G. Mustafa Shah

Physicochemical evaluation of wastewater from the main sewer in Abidjan City

January 2013

In many parts of the world, health problems have often been caused by untreated wastewater. The objective of this study was to determine the pollution level of wastewater in Abidjan City and to evaluate their impact on marine environment. Thus, wastewatersamples were collected and analyzed according to French Association of Standardization (FANOR). The results show that the values of these parameters...

Author(s): Yapo Toussaint Wolfgang, Mambo Veronique, Yapo Ossey Bernard, Seka M’bassidje Arsene and Houenou Pascal Valentin

A new model: Herbaceous species diversity along the environmental gradient in the typical hilly areas of Henan Province

January 2013

Ecological model is important. The relationship between biodiversity and disturbance gradient, however, makes it difficult to compare data from different studies and draw general conclusions. These results assessed the relationship between disturbance gradients and herbaceous species diversity in the typical hilly areas on varying spatial scales along the environmental gradient in Henan Province. Using community ecology...

Author(s): Bing-Hua Liao,, Pei-Song Liu, Zhen-Zhong Wen, Sheng-Yan Ding, Hai-Long Yu, Zhi-Chao Wang, Zhong-Kai Li, Huan-Xin Chu, Wen-Liang Li and Yi Shen

Natural recolonization and suburban presence of pumas (Puma concolor) in Brazil

November 2012

The puma (Puma concolor, Carnivora: Felidae), extinct from considerable extensions of its former distribution, is considered threatened in south, southeast and northeast Brazil. Areas in the south and southeast have only recently been recolonized by the species, following decrease in logging activities after depletion of the Atlantic rainforest in the 1960s, and measures implemented since 1993 to protect this ecosystem....

Author(s): Marcelo Mazzolli

Forest resources use, attitude, and perception of local residents towards community based forest management: Case of the Makira Reducing Emissions from Deforestation and Forest Degradation (REDD) Project, Madagascar

October 2012

Community participation is seen to be the building block for the efficiency of the Reducing Emissions from Deforestation and Forest Degradation (REDD) project. In order for local residents to cooperate with a reduction of deforestation and forest degradation, they must have a positive perception toward the forest conservation system and positive attitude toward the forest conservation...

Author(s): Cynthia Lalaina Ratsimbazafy, Kazuhiro Harada and Mitsuru Yamamura

Woody species composition, structure and diversity of vegetation of Kalfou Forest Reserve, Cameroon

October 2012

Studies were carried out in the Kalfou Forest Reserve to make an assessment of the flora diversity and to develop preservation guidelines facing the increase in its degradation. The composition of woody species, structure, diversity, density, dominance, frequency of species and family importance value were described and evaluated in all the forest reserve area. A total of 86 species representing 58 genera and 28...

Author(s): Moksia Froumsia, Louis Zapfack, Pierre Marie Mapongmetsem and Bernard-Aloys Nkongmeneck

Roadkill animals on national highways of Karnataka, India

October 2012

Highways passing through national reserves/wildlife sanctuaries have adverse impact upon wild animals. The present survey was conducted to estimate the roadkills on the National Highways NH212 and NH67 passing through Bandipur Tiger Reserve, Karnataka, India during summer and pre-monsoon season at various vegetational levels. The roadkills were monitored thrice a month in each habitat between January, 2007 and June,...

Author(s): Kanagaraj Muthamizh Selvan, Natarajan Sridharan and Sajan John

Patterns of human – wildlife conflicts in Zambia, causes, consequences and management responses

September 2012

  A study was carried out to determine causes, consequences and management responses of human – wildlife conflicts in Zambia during the period 2002 to 2010. Data was collected by field staff in the four management regions of Zambia Wildlife Authority and analyzed to establish patterns and species responsible for human fatalities, livestock predation, crop damage and other damages to human...

Author(s): Chansa Chomba, Ramadhani Senzota, Harry Chabwela, Jacob Mwitwa and Vincent Nyirenda

Comparative Aeropalynology of Ota, Nigeria

September 2012

The aeropalynological sampling of March 2011 was carried out at Ayetoro-Itele, Ota, southwest Nigeria. This was done to create a basis for comparison with March 2010 aerofloral data and verify conclusions made there with respect to its strange haze dust. An improvised aerofloral sampler made up of a food flask base, plastic cylinder, 5 µm mesh sieve and sieve-clamp was mounted on a 2 m stand beside the position of...

Author(s): Adeonipekun, Adegbenga Peter

Benthic macroinvertebrate community of Yousmarg streams (Doodganga stream and Khanshah Manshah canal) in Kashmir Himalaya, India

August 2012

This study attempts to provide an overview of the benthic macroinvertebrate assemblages of Yousmarg streams. For studying the distribution of macroinvertebrate assemblages in the two streams, that is, Doodganga and Khanshah manshah canal, a total of 4 study sites were selected. During the period of investigation, 24 species of macrozoobenthos in Yousmarg streams were recorded. Arthropoda was found to be the most...

Author(s): Shazia Habib and A. R. Yousuf

Long-term ecological impacts of harvesting non-timber forest products on tree species diversity at the periphery of Mbam and Djerem National Park, Cameroon

August 2012

Non-timber forest products (NTFPs) strongly contribute to livelihood security of forest-adjacent communities. This study examined the impacts of their harvesting on tree species diversity at the periphery of Mbam and Djerem National Park (Cameroon). Tree species diversity, with diameter at breast height (dbh) ≥ 10 cm, was analyzed in small plots (10 × 100 m) along seven 1-ha transects. Species diversity and...

Author(s): Souare Konsala, Amougou Akoa, Biye Elvire-Hortense and Fotso Roger-Corneille

Water resources management in the Brazilian agricultural irrigation

July 2012

The Brazilian agribusiness is growing fast, especially in the last fifteen years when the grains production almost two-folded. Besides the expansion in the agricultural frontier to the Amazonian Region, there are other drivers for the success. As one of the biggest country around the globe, Brazil has the largest water reserve in the world. Brazilian agriculture production and productivity are also related to the use of...

Author(s): Letícia de Oliveira and Edson Talamini

  • Article Number: DB156833528

The quest for a relevant environmental pedagogy in the African context: Insights from unhu/ubuntu philosophy

July 2012

The quest for environmental sustainability and sustainable use of natural resources has become mandatory if humanity is to successfully manage the environmental fall-out consequent upon industrialisation and modernisation. Educational responses to the environmental crisis involve introducing environmental education or education for sustainable development and of late Climate Change Education for Sustainable Development...

Author(s): Godfrey Museka and Manasa Munashe Madondo

An eco-epidemiological mathematical model with treatment and disease infection in both prey and predator population

July 2012

This paper examines an eco-epidemiological mathematical model with treatment and disease infection in both prey and predator population. A system of differential equations for the problem is proposed and analyzed qualitatively using the stability theory of the differential equations. A local and global study of the model is performed around the disease-free equilibrium and the endemic equilibrium to estimate...

Author(s): Alfred Hugo, Estomih S. Massawe and Oluwole Daniel Makinde

Rethinking green revolution program: The impact of Mozambique’s fast-track green revolution program on the environment and animal rights

June 2012

The green revolution program (GRP) in Mozambique has taken centre stage in academic circles, and academics and researchers have tussled with various aspects of this subject. While the GRP is meant to reduce the country’s food insecurity and was successfully implemented in some countries like India (Arundhati, 2004), the results have been different in many African countries. In Mozambique, GRP has dramatically...

Author(s): Munyaradzi Mawere

  • Article Number: 3FA3E763438

Aquatic ecosystem pollution and ecological impacts of agricultural sewage in the Caspian Sea watershed

June 2012

The existing system of management and development of irrigation and drainage without consideration of the ecological danger have led to disruption of the ecosystem balance and change it function. The existence of many rivers draining into the Caspian Sea, and uncontrolled utilization of pesticide toxicants, are one of major concern regarding the water resources in the north provinces of Iran. A study have been done for...

Author(s): Hassan Abbasian, Azim Ashayeri, Hamid G. Meigooni and Shamilla Hosseinmarzeh

Population status of the common hippopotamus (Hippopotamus amphibius) in Luangwa River, Zambia

June 2012

The population size of common hippopotamus, Hippopotamus amphibious in the Luangwa valley, Zambia was assessed for the period of 1976 to 2008. A comparison of historical data on population size for the period of 1952 to1975 was also made. Ecological carrying capacity (K) and carrying capacity band were estimated from data on population size. The river bank foot count method was used, which involved the...

Author(s): Chansa Chomba, Rhamadhani Senzota, Harry Chabwela and Vincent Nyirenda

Impact of climate change and anthropogenic activities on renewable coastal resources and biodiversity in Nigeria

May 2012

Climates related disaster is greatly human induced warming, leading to substantial fluctuations in earth temperature which is currently a global issue of environmental concern. Human proximity and pressure in and around the coastal region has threatened flora, fauna and micro-organic resources of economic importance in most developing nations. Two-third of the word populations lives in or around the coast and 16 of the...

Author(s): Amosu A. O., Bashorun O. W., Babalola O. O., Olowu R. A., and Togunde K. A.

Soil organic carbon stock potential of shrubs, occupying natural Anogeissus latifolia forest in sub-tropical belt of Garhwal Himalaya

May 2012

The soil organic carbon (SOC) stock in three pure shrub species was compared with the adjacent growing Anogeissus latifolia tree stand to understand the changes occurring in SOC stock as a consequence of degradation of A. latifolia forests. Among the shrubs, Rhus parviflora (168.00 ± 1.60 t ha-1) and Lantana camara (164.16 ± 2.08 t ha-1) showed higher values of...

Author(s): Munesh Kumar, Manish Kumar, S. S. Khan, M. Joshi, S. Kumar and J. A. Bhat

Impact of Climate Change in Bangladesh: The Role of Public Administration and Government’s Integrity.

May 2012

Climate change is one of the most important issues to tackle this generation and possibly any generation in history. Bangladesh is a very low energy consuming country, it is pursuing a low carbon growth path, while building its resilience to climate change and reducing the risk of climate change, which represents national development. However, Bangladesh is one of the top 10 nations that are mostly vulnerable...

Author(s): Shakeel Ahmed Ibne Mahmood

Population status and habitat-use pattern of Indian white-backed vulture (Gyps bengalensis) in Himachal Pradesh, India

April 2012

Studies on population status and habitat-use pattern of Indian White-backed Vulture (Gyps bengalensis) in Himachal Pradesh revealed the presence of 22 nesting colonies of this species, supporting 77 nests, of which, only 56 pairs bred successfully during breeding season (October to March/April) in 2010 to 2011. Breeding success increased from around 56% (2009 to 2010) to around 73% (2010 to 2011), indicating a slight...

Author(s): M. L. Thakur and S. K. Narang

Biochemical changes induced by dimethoate (Rogor 30% EC) in the gills of fresh water fish Puntius ticto (Hamilton)

April 2012

The freshwater fish Puntius ticto was exposed to lethal (5.012 ppm) and sublethal (2.506 and 1.253 ppm) concentrations of dimethoate for 96 h and 60 days, respectively. Biochemical changes in the gills were analyzed after exposure period. Exposure of fish to lethal and two sublethal concentration of dimethoate showed decreased in the protein content in the gills after 60 days exposure. As compared to lethal...

Author(s): Ganeshwade R. M.

Population status of the African elephant in Zambia

April 2012

Prior to the 1960s Zambia had an estimated elephant population of over 250, 000, but by 1989 it had fallen to about 18 000 individuals. After about 10 years of improved law enforcement operations and the involvement of local communities, populations stabilized and even started to increase by 1996. In order to update and compare population estimates, aerial surveys using similar methods used in the past were conducted...

Author(s): Chansa Chomba, Chuma Simukonda, Vincent Nyirenda and Francesca Chisangano

Determination of ground water quality of former Lake Haramaya, Oromia Regional State, Ethiopia

April 2012

The assessment of the quality of available groundwater in a certain area is indispensable for the development of human beings in every sector. This study conducted in 2010 assessed the groundwater quality of former Lake Haramaya area to check its suitability for domestic purpose. Primary data were collected from triplicate samples of six sources for physical, chemical and biological analysis. Based on the physical...

Author(s): Zinabu Tebeje Zewdu

Wildlife use of Bharandabhar forest corridor: Between Chitwan National Park and Mahabharat foothills, Central Tarai, Nepal

March 2012

Barandabhar forest is a wildlife corridor connecting Chitwan National Park and Mahabharat foothills in Nepal’s Inner Tarai. Chitwan harbors the largest population of the great one-horned rhinoceros (Rhinoceros unicornis L.) in Nepal. Barandabhar forest serves as a highly potential alternative habitat to enable wildlife to move up to Mahabharat foothills mainly during the rainy season. The whole forest...

Author(s): Ram Chandra Kandel

Assessing ecosystem effects of small–scale cutting of Cameroon mangrove forests

March 2012

One of the most universal forms of resource-use in the tropics is small-scale wood exploitation; but ecologists are only starting to study its effects. This paper examines the effects of small-scale wood harvesting on forest structure and composition of mangrove forests. A stratified sampling method was used to select the sample zone. The forest characteristics were assessed by employing the quadrat/census plot method...

Author(s): Longonje N. Simon and Dave Raffaelli

Gill net selectivity in the White Nile fisheries, Khartoum State, Sudan

March 2012

Gill-net selectivity is a size and type of fish that caught depending upon specific mesh size of a used gill-net. In this study, four different mesh sizes (4, 6, 8 and 15 cm) were used in al-Kalakla Fishery (KF) and Jabel Awlia Dam Fishery (JADF) in the White Nile for studying their selectivity. The results of a catch per unit effort (CPUE) study showed that meshes 4 and 6 cm had higher productivity in fishing in KF...

Author(s): Mohammed M. O. and Ali M. E.

Indigenous knowledge on fuel wood (charcoal and/or firewood) plant species used by the local people in and around the semi-arid Awash National Park, Ethiopia

March 2012

Fuel wood (charcoal and/or firewood) species used by the Afar and Oromo (Kereyu and Ittu) Nations in and around the semi-arid Awash National Park (ANP), Ethiopia was conducted ethnobotanically. The study aimed to investigate and document various aspects of indigenous knowledge (IK) on fuel wood species and their associated threats. A total of 96 informants between the ages of 20 and 80 were selected using prior...

Author(s): Tinsae Bahru, Zemede Asfaw and Sebsebe Demissew

Comparative survey on the essential oil composition from the leaves and flowers of Laurus nobilis L. from Kerman province

March 2012

The chemical composition of the essential oils of the leaves and the flowers of Laurus nobilis L. (Lauraceae) from Kerman province, Iran were obtained by hydrodistillation method and analyzed by gas chromatography and gas chromatography mass spectrometry. Thirty-three compounds, accounting for 95.75% of the total oil with 1.8% oil yield were identified in the essential oil of the leaves. The...

Author(s): M. Moghtader and H. Salari

Simulation of the impacts of three management regimes on carbon sinks in rubber and oil palm plantation ecosystems of South- Western Cameroon

March 2012

The impacts of managed, extended and complete rotation on carbon sequestration in rubber and oil palm plantations were simulated using the CO2FIX V.2 model, using degraded farmland carbon stocks as a baseline. Results showed that the extended rotation resulted in higher C-sequestration in rubber (264 Mg C/ha), and the complete rotation (88 Mg C/ha) for the oil palm plantation. There was better soil carbon recovery in...

Author(s): Andrew E. Egbe, Pascal T. Tabot, Beatrice A. Fonge and Eneke Bechem

Field foot patrol effectiveness in Kafue National Park, Zambia

March 2012

Field foot patrols effectiveness for wildlife protection in a large vegetal mosaic Kafue National Park (22,400 km2) was assessed for two successive periods of different duration. The relationship between patrol days spent in the field by patrol teams and resultant outcomes was determined. Using trained patrol scout teams, field data was recorded on prescribed patrol forms. Prosecution data was populated into database...

Author(s): Vincent R. Nyirenda, and Chansa Chomba

Evaluating the influence of open cast mining of solid minerals on soil, landuse and livelihood systems in selected areas of Nasarawa State, North-Central Nigeria

February 2012

The study was conducted on soils of selected mining areas in Nasarawa State, North Central Nigeria to assess the environmental impact of open cast mining of coal and Baryte minerals. These entailed a survey of twenty four farm households, while soils, minespoils and water were collected and subjected to standard laboratory analyses. The results showed that soils around the mine sites were coarse...

Author(s): Ezeaku, Peter Ikemefuna

Compositional features of precambrian pegmatites of Ago-Iwoye area South Western, Nigeria

February 2012

The increase in global demand for rare metal Ta-Nb deposits has caused a resurgence of interest in the search for economically viable deposits. Precambrian pegmatites occurring as near vertical dykes have been studied, with the aim of determining their compositional features and possible economic values. Four thin sections were prepared from the pegmatites of the study area for petrographic study. A total of twenty five...

Author(s): Akintola, A. I., Ikhane, P. R., Okunlola, O. A., Akintola, G. O. and Oyebolu, O. O.

Evaluation of Sesbania sesban L. (Merr) and Mimosa invisa L. (Fabaceae) as sources of nitrogen in irrigated rice on the Vertisols of the Accra Plains of Ghana

February 2012

Sesbania sesban L. (Merr) and Mimosa invisa L. (Fabaceae) were grown in rotation with lowland rice (var. KRC Baika). The experiments were conducted on three farmers’ fields at the Kpong Irrigation Project (KIP) sites at Akuse (lat 6° 06' N, long 0° 07' E) and Asutsuare (lat 6° 04' N, long 0° 12' E). In Farm 1, S. sesban and M....

Author(s): K. K. Nyalemegbe, S. Asuming-Brempong, and S. K. A. Danso

The invasive status of wild barley (Hordeum spontaneum Koch) in Iranian flora

February 2012

The success of a weed’s biological pathway is dependent on several factors including the mechanism(s) of dispersal, longevity of seeds in the soil seed bank, adaptation to varying environmental conditions and, competitive and reproductive abilities. In Near East barley, some races can be identified as wild but in other races wild and weed forms are confounded. Wild barley has wider distribution than the wild wheat...

Author(s): Reza Hamidi

Agricultural land allocation in small farms around Maasai Mau forest, Kenya and the implications on carbon stocks

February 2012

Recent assessment of the Maasai Mau forest-part of the largest remaining natural forest in Kenya revealed that direct expansion of small farms into the forest in response to population and climate induced land use pressures, largely contributed to a 42% loss in forest cover between 1995 and 2008. In response, the Kenyan government plans to integrate farmers into forest management initiatives through incentive schemes...

Author(s): Joanes O. Atela, Manfred Denich, Richard Kaguamba and Jacob Kibwage

Effect of pH decline by acidified spring water on the growth of a submerged macrophyte, Egeria densa (Hydrocharitaceae) in the Kurohashi River, Japan

February 2012

A decline in pH shifts the equilibrium balance of HCO3- -free CO2 towards a regime dominated by free CO2 in the water. Based on the phenomenon, the effect of different pH values on the growth of a submerged macrophyte Egeria densa was investigated in an acidified spring-fed stream in Japan. The growth rate of E. densa during its developing period was found to negatively correlate to...

Author(s): Kazuya Takahashi, and Takashi Asaeda,

Forest duiker (Cephalophus spp.) abundance and hunting activities in the Kakum conservation area, Ghana

February 2012

The abundance of forest duikers (Cephalophus spp.) was compared to the incidence of hunting activities in the Kakum conservation area, Ghana. Transect surveys indicated that four duiker species were present: Maxwell’s duiker (Cephalophus maxwellii), Bay duiker(Cephalophus dorsalis), Black duiker (Cephalophus niger), and Yellow-backed duiker(Cephalophus silvicultor). The indicators of hunting...

Author(s): Edward D. Wiafe and Richard Amfo-Otu

The slenderness of the softwood Riparian forest species Salix alba L. and Salix fragilis L. in the protected area of Nestos Delta, Greece

January 2012

The slenderness (height/diameter or h/d ratio) is an important factor, which describes the type of stem  that each forest species develops. It depends on the species, the tree age and the site conditions. It is a  basic factor that characterizes the structure and stability of the stand and a means for the assessment  of the dynamics of height course. The objective of the present study was to...

Author(s): George Efthimiou

Ligneous flora diversity of a submountain forest of West Cameroon: The Kouoghap sacral forest of the village Batoufam

January 2012

Batoufam is a village of the high lands of the West of Cameroon, situated about 20 km to the South of Bafoussam (5°14' to 5°18' N latitude and 10°20' to 10°31' E longitude), inside the Batoufam-Bayangam caldeira of the volcanic massif of Bangou. The sacred forest Kouoghap (SF) is located on the south-eastern side of this caldeira at 1,450 to 1,550 m elevation. It is estimated today at 47...

Author(s): Emmanuel NOUMI

Dry season herbivore utilization of open grasslands in Lower Zambezi National Park, Zambia

January 2012

Utilisation of open grassland plains by large herbivores (≥100 kg) and harvester ants (Messor capensis) in Lower Zambezi National Park, Zambia was assessed every September from 1997 to 2007. A point intercept method was used to estimate percent cover for grass, shrub, bare, litter, herbivore droppings and presence of harvester ants in the Jeki open grassland vegetation community as indicators of...

Author(s): Chansa Chomba, Ramadhani Senzota, Harry Chabwela, Jacob Mwitwa and Vincent Nyirenda

Microbial corrosion of steel coupons in a freshwater habitat in the Niger Delta

January 2012

Microbial corrosion of stainless, mild and carbon steel coupons in a semi static freshwater habitat was carried out monthly for a period of one year. Corrosion rate was determined by weight loss. Carbon steel had corrosion rate of 44 g/year, mild steel 27 g/year, stainless steel 0.64 g/year. Ecological quality parameters of the river water for rainy season decreased from April to October, respectively in the following...

Author(s): Odokuma L. O. and Ugboma C. J.

Influence of Zn stresses on growth and physiology in Khus-khus (Vetiveria zizanoides Nash.) and its essential sesquiterpene oil(s), in relation to roots diameter circumferential positions

January 2012

Culturing Khus in controlled glasshouse condition in sand culture techniques for maximum essential monoterpene oil(s) was found (0.21%) in young developed middle position circumferences of roots. At middle position of leaf, net photosynthetic rate and contents of chlorophyll (Chl) were affected. The maximum peroxidase activity was obtained at the middle position of leaf and roots circumferences area, with the maximum...

Author(s): A. Misra, N. K. Srivastava and A. K. Srivastava

Pollution status and effect of crude oil spillage in Ughoton stream ecosystem in Niger Delta

December 2011

The present study evaluates the pollution status and the physico-chemical characteristics of Ughoton stream water as it affects the quality of water and its impact on Ughoton stream ecosystem. Surface water samples were collected at various distances, 50,100, 250, and 500 m downstream from an oil well. The potentially toxic elements, Fe, Mn, Zn, Ca, Cr, Cd, Ni, and Pb were analyzed. Other parameters including...

Author(s): Uzoekwe, S. A. and Achudume, A. C.

Determinants of individual willingness to pay for quality water supply: The case of Wonji Shoa Sugar Estate, Ethiopia

December 2011

This paper analyses the determinants of households’ willingness to pay (WTP) for quality water supply, using the contingent valuation method (CVM). The study was conducted with randomly selected households in the factory villages of Wonji Shoa Sugar Estate, Ethiopia. The value elicitation method used is a close ended format questionnaire with additional close ended format and open ended follow up questions, which...

Author(s): Simiret Wendimu and Wagayehu Bekele

  • Article Number: D24342010283

Wildlife crop depredation in the Luangwa Valley, eastern Zambia

December 2011

Wildlife crop raiding was assessed in six chiefdoms of the Luangwa Valley, eastern Zambia between 2004 and 2008 to establish nature and extent of wildlife crop degredation and examine the impact of existing mitigation measures being implemented to deter wildlife crop raiding. Crop damage assessments, involving crop quality, stage of growth and proportion of crop damage, were conducted using six trained field...

Author(s): Vincent R. Nyirenda, Wilbroad C. Chansa, Willem J. Myburgh and Brian K. Reilly

  • Article Number: 4DCE12410305

The celestial factor

December 2011

In reality there are various kinds of explanations for each type of extinction. This paper introduces a new theory to explain and to estimate the size and frequency of all extinctions over the entire period of 600 my of the fossil record. The central point was the search for a common pattern and even one common formula. The explanation seemed to be excellent. We will demonstrate in what way death is a fact of life: by...

Author(s): P. C. van den Noort and A. M. T. Elewa

Distribution and succession of aquatic macrophytes in Chilka Lake - India

December 2011

Chilka is the largest brackish water lake in Asia and also the second largest lake in the world. It is situated between 19°28' and 19°54' North latitude and 85°05' and 85° 38' East longitude. A mix of estuarine, marine and freshwater ecosystem is observed here and the lagoon has a long history of sustainable fishing. In September 2000 as a part of its management endeavour, the local...

Author(s): M. Jaikumar, D.Chellaiyan, L.Kanagu, P. Senthil Kumar and C. Stella

Assessment of heavy metals (lead and cadmium) concentration in Paspalum orbiculare near municipal refuse dumpsites in Lagos State, Nigeria

December 2011

Lead and cadmium concentrations in Paspalum orbiculare from four different dumpsites and a control site were determined in this study. The Plant samples were analyzed for lead and cadmium concentrations using a flame atomic absorption spectrophotometer (FAAS) Perkins Elmer Model 500. The presence of lead in the plant tissues obtained form the study site where burning was attributed to the high degree of...

Author(s): Akinola, Mudope Olatunde, Njoku, Kelechi Longinus and Ifitezue, Nkieruka Vivian

Understanding potable water supply costs, pricing, tariffs and cost recovery in low income and developing countries: A comprehensive synthesis

November 2011

Potable water supply involves costs and the recovery of these costs is important for the provision of adequate services and the sustainability of water supply systems. User fees through tariffs constitute an important source of cost recovery, thus the pricing of water services is a key issue in the provision of potable water. This paper, based on a literature review, provides a comprehensive synthesis of water pricing,...

Author(s): Folifac F and Gaskin S

  • Article Number: 9064ACA10211

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