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: 386

JENE Articles

Recent limnological changes and their implication on fisheries in Lake Baringo, Kenya

May 2014

Water samples for physico-chemical analysis for this study were collected monthly for five years between April 2008 and March 2013. Conductivity, temperature, dissolved oxygen and pH was measured in situ using a Surveyor II model hydrolab. Chlorophyll-a concentration was determined using a Genesys 10S Vis spectrophotomer. Nutrients were determined using standard methods and procedures. Analysis of...

Author(s): Omondi, R, Kembenya, E., Nyamweya, C., Ouma, H., Machua, S.K. and Ogari, Z.

Exploration of climate influences on the abundance of galls on red willow (Salix laevigata) across two riparian communities in Southern California

May 2014

In Southern California, the red willow (Salix laevigata Bebb) hosts a variety of gall-inducing parasitic insects. However, little is known about the ecology of these parasites, particularly the characterization of their microclimate preferences. This study explores the relationship between microclimate and gall frequencies in S. laevigata in the Ballona Wetlands and Temescal Canyon, and gall count correlated with biotic...

Author(s): Tauras Vilgalys, Rachael Sears, Emily Hand, Sara Morledge-Hampton and Víctor D. Carmona-Galindo

Status of Hagenia forest in the Parc National des Volcans, Rwanda: A review of historical records

May 2014

Hagenia-shaped habitat is an important element in conservation of world’s only population of mountain gorillas surviving in the wild. In fact, in the Parc National des Volcans (henceforth PNV), gorillas spend most of their life time in the nutritious herbaceous habitats near or within the Hagenia-Hypericum zone. Unfortunately, populations of Hagenia abyssinica in this park have been reported to be ageing. Using...

Author(s): Seburanga J. L., Nsanzurwimo A. and Folega F.

Diversity of Vepris heterophylla (Engl.) Letouzey morphotypes in the Sudano-Sahelian zone of Cameroon

May 2014

Vepris heterophylla (Engl.) Letouzey (Rutaceae) is a useful and threatened plant of Sudano-Sahelian zone of Cameroon. However, its description is not clear. This study aims to evaluate morphological variations among ten populations to delimitating the V. heterophylla morphotypes in the zone. Two hundred and fifty (250) individuals belonging to 10 populations were assessed by morphological descriptors including eight...

Author(s): Y. Hamawa, and P. M. Mapongmetsem

Macroinvertebrates (oligochaetes) as indicators of pollution: A review

April 2014

Macroinvertebrates formed an important constituent of an aquatic ecosystem and had functional importance in assessing the trophic status as the abundance of benthic fauna mainly depends on physical and chemical properties of the substratum and thus the benthic communities respond to changes in the quality of water and available habitat. This review discussed the occurrence, compo-sition and distribution of...

Author(s): Rafia Rashid and Ashok K. Pandit

Molecular diversity of arbuscular mycorrhizal fungi (AMF) in Lake Victoria Basin of Kenya

April 2014

Arbuscular mycorrhizal fungi (AMF) play a key role in land reclamation, sustaining soil fertility and cycling of nutrients, which in turn increases plant vigour and productivity. AMF differ in both structural characteristics and global distribution, which is strongly correlated with the respective functional role. This study investigated the molecular diversity of arbuscular mycorrhizal fungi (AMF) in selected...

Author(s): Othira J. O, J. O. Omolo, S. Kiruki, L. A. Onek and F. N. Wachira

Residues of diazinon in Ab-bandans supplied by Babolroud, Talar and Siaroud Rivers, Iran

April 2014

In this http://www.wessex.ac.uk/components/com_forme/uploads/ study, diazinon, as an organophosphorus pesticide, was measured in nine Abbandans (man-made wetland) in Mazandaran Province: Kharajisha, Ramenet, Esmaeelkola, Kordkola, Shrag-e-Larim, Anarmarz, Roshandan, Galeshkola and Langoor from April 2010 to March 2011. A total of 216 samples were taken from nine abbandans of the South Caspian lowland. Samples analyzed...

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

Statistical analysis of hydrological properties and genetic toxicity of Maheshara Lake

April 2014

The purpose of this study was to assess the water qualities and genotoxicity of Maheshara Lake situated near Gorakhpur, India. The lake receives many types of pollutants from two industries, agricultural run-off and domestic sewages. A total of five sampling stations were established for measurement of water pollution and the measurement of cytogenetic alterations in vivo is considered an initial step in the risk...

Author(s): Pallavi Srivastava and Ajay Singh

Plankton diversity in Krishna River, Sangli, Maharashtra

April 2014

Quantitative assessment of plankton was carried out in distinct sites of the river Krishna, district Sangli during January 2011 to December 2012. Phytoplankton diversity was observed in five groups, that is, Cyanophyceae, Bacillariophyceae, Chlorophyceae, Hydrocharitaceae and Desmidiceae including 53 species. Among them, Chlorophyceae was dominating with 22 species. Diversity of zooplanktons included, Cladocera,...

Author(s): A. B. Sarwade and N. A. Kamble

Effect of rainfall season on the chemical properties of the soil of a Southern Guinea Savanna ecosystem in Nigeria

April 2014

Investigations were carried out on the effect of rainfall pattern on some soil chemical properties during 2011 in the Southern Guinea savanna ecosystem in Nigeria. The study was carried out in Oro Forest Reserve in Kwara State of Nigeria. Twenty plots were randomly selected for soil sampling at for different seasons namely: January (dry season), May (beginning of rains), September (peak of rains) and November (end of...

Author(s): Ayo Fatubarin and M. R. Olojugba

Carbon stocks of Hanang forest, Tanzania: An implication for climate mitigation

March 2014

The study assessed carbon stocks of Hanang mountain forest, Tanzania. Thirty-four sample plots (40 × 50 m) were established along an altitudinal gradient. All trees with diameter at breast height ≥10 cm were identified and measured, and herb species and soil were sampled from four 1 × 1 m quadrats within 10 × 10 m subplots. Mean carbon stock was 48.37 and 0.26 t C ha-1 for tree and herb species,...

Author(s): Godgift Swai, Henry J. Ndangalasi, Pantaleo K.T. Munishi and Deo D. Shirima

Species and breeding population of waterbirds on four islands in Kore Mosa in Persian Gulf in 2003 and 2012

March 2014

The research was conducted in Ghabre Nakhoda, Nedelghar, Dara and Boneh islands in Khore Mosa Ramsar site in the Persian Gulf from May to December 2003 and 2012. Total count method was used to obtain the census of the nests and breeding population of waterbirds on the Islands. Thirty three (34) species of waterbirds were identified, of which eight species were breeders. The maximum breeding population of Lesser Crested...

Author(s): Behrouz Behrouzi-Rad

Phytosociological features and threat categorization of A. heterophyllum Wall. ex Royle and A. ferox Wall. ex Ser. in Kumaun Himalaya

March 2014

Alpine and subalpine regions of Kumaun Himalaya were surveyed qualitatively and quantitatively for the population study to determine the status of Aconitum ferox and A. heterophyllum. Low population density across the surveyed populations and restricted distribution to specific pockets indicates poor availability of the species in the study area. Illegal and over exploitation of these species pose threat to their...

Author(s): Deepika Bhatt, G. C. Joshi, Ravi Kumar and L. M. Tewari

Impact of climate change in Bangladesh: Role of two governments

March 2014

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. Bangladesh is one of the top 10 nations; mostly vulnerable to climate change and by the end of the century, Bangladesh is set to disappear under the waves. Both Bangladesh and India are parties to the...

Author(s): Shakeel Ahmed Ibne Mahmood

Visible near infra-red (VisNIR) spectroscopy for predicting soil organic carbon in Ethiopia

March 2014

Over the past few decades, the advantages of the visible-near infra-red (VisNIR) diffuse reflectance spectrometer (DRS) method have enabled prediction of soil organic carbon (SOC). In this study, SOC was predicted using regression models for samples taken from three sites (Gununo, Maybar and Anjeni) in Ethiopia. SOC was characterized in laboratory using conventional wet chemistry and VisNIR-DRS methods. Principal...

Author(s): Abebe Shiferaw, and Christian Hergarten

Endangering the endangered: Are protected areas save havens for threatened species in Cameroon? Case of Banyang-Mbo Wildlife Sanctuary, South Western Cameroon

February 2014

A hunting survey was conducted in the Banyang-Mbo Wildlife Sanctuary and support zones to estimate bushmeat off-take as a means to understand the current conservation status of protected species in that important area of biodiversity in Cameroon. A total of 756 protected animal carcasses with a total biomass of 6,815 kg, in six taxonomic groups constituted 24% of the total off-take of animals killed or captured by two...

Author(s): Ajonina S. A., Gerhard Wiegleb, Nkwatoh Athanasius Fuashi and Hofer Heribert

Effect of passive acoustic sampling methodology on detecting bats after declines from white nose syndrome

February 2014

Concomitant with the emergence and spread of white-nose syndrome (WNS) and precipitous decline of many bat species in North America, natural resource managers need modified and/or new techniques for bat inventory and monitoring that provide robust occupancy estimates. We used Anabat acoustic detectors to determine the most efficient passive acoustic sampling design for optimizing detection probabilities of multiple bat...

Author(s): Laci S. Coleman, W. Mark Ford, Chris A. Dobony and Eric R. Britzke

Overhead shading and growth of young longleaf pine

February 2014

A study to determine the effects of environmental conditions on the growth of longleaf pine (Pinus palustris Mill.) was initiated in 1969 on the Escambia Experimental Forest near Brewton, Alabama, USA. This study sample consisted of forty young naturally regenerated, even aged longleaf pine seedlings evenly divided between two soil types. At the beginning of the study, the seedlings were 14 years from seed and ranged in...

Author(s): John C. Gilbert, John S. Kush, Ralph S. Meldahl, William D. Boyer and Dean H. Gjerstad

Fine-scale spatial distribution of biomass using satellite images

February 2014

Spatial information on the distribution of biomass is an important issue for monitoring and managing the environment. It is a prerequisite for successful forest fire management and for predicting fire intensity and fire behaviour, but estimates of biomass are time consuming and expensive and need to be done depending on size classes. We propose a method that takes into account the contemporary use of an allometric...

Author(s): E. Santi, C. Tarantino, V. Amici, G. Bacaro, P. Blonda, L. Borselli, M. Rossi, S. Tozzi and D. Torri

Differential Resource allocation of black mustard plants (Brassica nigra L.) with proximity to black walnut trees (Juglans californica L.) in a Southern California Riparian ecosystem

February 2014

The invasive forb Brassica nigra (black mustard) and the native tree Juglans californica (black walnut) are allelopathic species that suppress the growth of neighboring plants. This study evaluates how allocation to root, reproductive, and photosynthetic biomass in B. nigra was affected with proximity to J. californica.  We hypothesized that a joint suppressive effect would lead to lower root biomass allocation in...

Author(s): Matt Cronrod, Kellyanne Gold, and Víctor D. Carmona-Galindo

Brick kiln emissions and its environmental impact: A Review

January 2014

Brick manufacturing is the fastest-growing industrial sector in many countries (like china, India, Bangladesh and Pakistan) and among the top three sectors, along with vehicle exhaust and resuspended road dust, contributing to the air pollution and health problems in Dhaka (Bangladesh). The total emissions from the brick manufacturing in the Greater Dhaka region, to produce 3.5 billion bricks per year has been estimated...

Author(s): Bhat Mohd Skinder, Afeefa Qayoom Sheikh, Ashok K. Pandit and Bashir Ahmad Ganai

Diel variations in limnological characteristics of Omkareshwar reservoir of Narmada river, India

January 2014

The present study was carried out to ascertain the magnitude of seasonal diel variations in physicochemical and biological variants with reference to phytoplankton, zooplankton and primary productivity at newly formed Omkareshwar reservoir on the river Narmada for the year 2012. Diel variations in physicochemical parameters such as temperatures, pH, transparency, total alkalinity, total hardness, chloride content,...

Author(s): Khwaja Salahuddin Manish Visavadia, Suresh Gor, Chirag Gosai, Virendra Kumar Soni and Mohammad Dilshad Hussain

Assessment of water quality of traditionally protected and unprotected rivers, streams and ponds in the Niger Delta, Nigeria

January 2014

Water quality of some traditionally protected water bodies (Obi Pond, Abua Lake, Usede Lake, Atochi Stream and River Ethiope (Source) and unprotected water bodies (Ame-Oghene Pond, Oguta Lake, Omoku Pond, Tenmako Lake and Ikarama Lake) that commonly serve for domestic and drinking purposes in the Niger Delta area of Nigeria have been studied. The purpose of this study was to compare the water quality of traditionally...

Author(s): A. Rim-Rukeh and G. Irerhievwie

The impact of water quality on species diversity and richness of macroinvertebrates in small water bodies in Lake Victoria Basin, Kenya

January 2014

This study was carried out in small water bodies (SWBs) within Uasin-Gishu and Siaya Counties of Kenya to investigate the effects of water quality on species diversity and richness of macroinvertebrates in these areas. The water quality of the SWBs was assessed in two dams in Uasin-Gishu County (Kesses and Kerita) and the other two in Siaya County (Mauna and Yenga) within Lake Victoria Basin. Water samples for total...

Author(s): Steve Omari Ngodhe, Phillip Okoth Raburu and Alfred Achieng

The physiological mechanisms of calcium chloride application on broad bean plants grown under salinity stress

December 2013

Salinity stress decreases the dry mass of shoot and root, the percentage of this decrease varied between the two plant organs. Roots seemed to be more salt sensitive than shoots. This was accompanied with a lower Na+ content in the shoots than roots. The organic cytosolutes (soluble carbohydrates, soluble proteins and proline) were much higher in shoots than roots. Treatment plants with CaCl2 retarded the Na+ and...

Author(s): Hamdia M. Abd El-Samad and Nasser A.M. Barakat

Agroforestry typology of some cocoa based agroforests in the Mbam and Inoubou division: The importance for local population livelihoods

December 2013

In order to estimate agroforestry typology of concerned cocoa based agroforests, a study was carry out in the Mbam and Inoubou division, Centre region of Cameroon. It focalized on farmer’s agroforests diversity strategies and the relationship between these systems and associated fruit trees planted to raise the revenues. To achieve this goal, 26 sampling plots of 100 x 40 m has been establish in cocoa based...

Author(s): Jiofack, T., Guedje, N.M., Tchoundjeu, Z., Fokunang, C., Lejoly, J., and Kemeuze, V.

Physico-chemical behavior of three different water bodies of sub tropical Himalayan Region of India

December 2013

This research paper represents a brief analysis of physico-chemical characteristics of three different water bodies namely: earthen pond, cemented pond and lake located at Bhimtal, Nainital, Uttarakhand during winter season. Air temperature, water temperature, pH, DO, free CO2, total alkalinity, total hardness, total nitrogen, nitrite, nitrate, phosphate, ammonium and silicate were the physico-chemical parameters...

Author(s): Anand Singh Bisht, Gulam Ali, D.S.Rawat and N. N. Pandey

Fish-habitat relationships in the Tonawanda and Johnson Creek Watersheds of Western New York State, USA

December 2013

Warm water stream fish assemblages (2005) and habitat variables (2004 and 2005) were examined from May to September at 108 sites in the Tonawanda and Johnson Creek Watersheds of Western New York. Seventy species and > 27,500 fishes were identified; ~98% were from Families Cyprinidae, Centrarchidae, Catostomidae and Percidae. Data were analyzed at 16 spatial scales using best subsets and backward stepwise multiple...

Author(s): Scott M. Wells and James M. Haynes

Phytosociology of some weeds of wheat communities around Kotli fields, Western Himalaya

November 2013

There were ten plant communities of weeds in wheat fields of Kotli. The communities were Euphorbia-Desmostachya-Coronopus, Parthenium-Galium-Taraxacum, Zanthium-Bidens-Bothriochloa, Silybum – Amaranthus-Avena, Ranunculus-Silybum-Imperata, Oxalis-Cannabis–Vicia, Calendula-Fimbristylis-Desmodium, Taraxacum-Geranium-Poa, Phalaris-Geranium-Cynoglossum and Themeda-Cardus-Urtica. The soil texture differs from loam...

Author(s): Zahid Hussain Malik, Muhammad Shoaib Amjad, Sidra Rafique and Nafeesa Zahid Malik

Plant nutrient release composition in vermicompost as influenced by Eudrilus eugenae using different organic diets

November 2013

Sub-adult earthworms, Eudrilus, Eugenae were cultured for 100 days in rubber containers made from old tyres to determine the plant nutrient release composition in vermicompost using different organic diets. The diets are Andropogon grass + Pig manure (AGPM) Andropogon grass (AG), Bracharia grass + pig manure (BGPM) and Bracharia grass (BG). Result of the study show that the produced vermicompost in each diet consisted...

Author(s): Nweke I. A

Assessment of biomass carbon stock in an Ailanthus excelsa Roxb. plantation Uttarakhand, India

November 2013

The article presents biomass carbon stock for an Ailanthus excelsa plantation in Dehradun Forest Division, Uttarakhand, India. Destructive sampling was used to calculate the biomass of A. excelsa and undergrowth vegetation (shrubs and herbs); volumetric equations were used for estimating the biomass of associated tree species. The total biomass of A. excelsa was calculated as 126.07 t ha-1 with above ground biomass...

Author(s): Nishita Giri and Laxmi Rawat

Abundance and diversity of Arbuscular mycorrhizal fungal (AMF) communities associated with cassava (Manihot esculenta Crantz) rhizosphere in Abengourou, East Côte d’Ivoire

November 2013

Soils from four different cassava cropping fields (Aniansué 1, Aniansué 2, Dramanekro 1, Dramanekro 2) were analyzed to evaluate abundance and diversity of Arbuscular Mycorrhizal Fungi associated with cassava rhizosphere in Abengourou, East Côte d’Ivoire. It was shown that the soils in the cassava cropping fields were all acidic with low levels of available phosphorus (P). A total of 29 species...

Author(s): Don-Rodrigue Rosin Bi VOKO, Jacob NANDJUI, Jean-Marc Drolet SERY, Beaulys FOTSO, Jesus Amoua AMOA, Marie-Stephanie  Aka Kouadio, Seydou COULIBALY, Sebastien NIAMKE and Adolphe ZEZE

Characterization and impact of wood logging on plant formations in Ngaoundéré District, Adamawa Region, Cameroon

October 2013

This study was conducted to characterize the different plant formations (shrubby, arborescent and woody savanna) and to ascertain the impact of wood logging on the floral diversity in the guinea savanna zone of Ngaoundéré District, Adamawa Region, Cameroon. The “Point-Centered Quarter (PCQ) Method” was used on 120 sites measuring 50 × 50 m. Results showed that...

Author(s): Tchobsala and Mbolo, M.

Composition of understory vegetation in tree species of Cholistan desert, Pakistan

October 2013

In the present study the understory vegetation or communities under the canopy of tree species of Cholistan desert (27° 42’ and 29° 45’ North and longitudes 69° 52’ and 75° 24’East) and the effect of canopy cover on the soil chemistry were studied. Quadrats of 1 m2were laid to record the different plant species underside the canopy cover of tree species and...

Author(s): Muhammad Farrukh Nisar, Farrukh Jaleel, Muhammad Waseem, Sajil Ismail and Muhammad Arfan

A preliminary simulation model of individual and synergistic impacts of elephants and fire on the structure of semi-arid miombo woodlands in northwestern Zimbabwe

October 2013

Sustainable management of plant-herbivore systems requires an understanding of their long-term dynamics through modeling approaches. A preliminary simulation model was developed using STELLA to predict the impacts of elephants and fire on the structure of semi-arid miombo woodlands of north-western Zimbabwe. Elephants alone at a density of 0.27 km-2 will convert the woodland into coppice in 120 years due to...

Author(s): Isaac Mapaure

Snow leopard (Panthera uncia) surveys in the Western Himalayas, India

October 2013

We conducted surveys above 3000 m elevation in eight protected areas of Uttarakhand and Himachal Pradesh. These surveys provide new information on snow leopard in Uttarakhand on the basis of indirect evidence such as pugmark and scat. Snow leopard evidence (n = 13) were found between 3190 and 4115 m elevation. On an average, scats (n = 09) of snow leopard were found for every 56 km walked and pugmarks (n = 04) for every...

Author(s): Aishwarya Maheshwari, Diwakar Sharma and S. Sathyakumar

Invasion of the Mozambique tilapia, Oreochromis mossambicus (Pisces: Cichlidae; Peters, 1852) in the Yamuna river, Uttar Pradesh, India

October 2013

Oreochromis mossambicus (Peters, 1852) is a highly successful invader of aquatic ecosystems due to its adaptable life history, tropic flexibility, ability to tolerate extreme and often unfavourable environmental conditions, rapid reproduction and maternal care of offsprings. Upon introduction to areas outside its natural range, these characteristics ofte give O. mossambicus a competitive advantage over indigenous...

Author(s): Mushtaq Ahmad Ganie, Mehraj Din Bhat , Mohd Iqbal Khan, Muni Parveen, M. H Balkhi  and Muneer Ahmad Malla

Diversity and distribution of macrofungi (mushrooms) in the Mount Cameroon Region

October 2013

This study was carried out to document the diversity and distribution of macrofungi in the Mount Cameroon Region. These were assessed at low and high altitudinal ranges in the four flanks of the mountain during the rainy and early dry seasons of 2010 and 2011. A total of 177 macrofungal species belonging to 83 genera and 38 families were recorded. Species richness was higher in the rainy seasons (134 species) than...

Author(s):   Egbe Enow Andrew, Tonjock Rosemary. Kinge , Ebai Maureen Tabi, Nji Thiobaland Afui Mathias Mih

Spatial relations of migratory birds and water quality management of Ramsagar reservoir, Datia, Madhya Pradesh, India

October 2013

Ramsagar reservoir is constructed over Nichroli nallah, in the Basin of Sindh River in district Datia, Madhya Pradesh, India. The present study has been carried out from April, 2003 to March, 2005. Eighteen species of birds belonging to 5 different orders and 11 families were recorded. Out of these, family Ardeidae with 4 species was dominant followed by Charadridae, Anatidae, Rallidae, Palacrocoracidae, Sturnidae,...

Author(s): R.K. Garg, R.J. Rao and D.N. Saksena

Food and feeding habits of three main fish species in Lake Baringo, Kenya

September 2013

The diets of three fish species of commercial importance in Lake Baringo, Protopterus aethiopicus, Clarias gariepinus and Oreochromis niloticus, were determined using frequency of occurrence and volumetric methods between April 2008 and March 2010. Seine and gill nets were used to catch a total of 430 fish specimens. The diet of P. aethiopicus was 94.3% molluscs with a frequency of...

Author(s): Omondi, R., Yasindi A.W. and Magana A. M

Climatic niche of Dacryodes edulis (G. Don) H.J. Lam (Burseraceae), a semi-domesticated fruit tree native to Central Africa

September 2013

Dacryodes edulis is a fruit tree growing naturally in the rainforests of Central Africa. To provide data to scientists and forest managers for the habitat of D. edulis in the wild, the study of ecological niche and environmental adaptation was carried out. The geographical coordinates of 168 collections of wild individuals and...

Author(s): Gilbert TODOU, , , Geo COPPENS d’EECKENBRUGGE, Hélène I. JOLY,Amougou AKOA, Jean-Michel ONANA and Gaston ACHOUNDONG  

Study of flora of Miandasht Wildlife Refuge in Northern Khorassan Province, Iran (a)

September 2013

A wide area of Iran is covered by arid and semiarid regions. In this survey, flora of an area of the Miandasht Wildlife Refuge, out of the safe part, was studied. This region covers 84435 Ha, situated in the west of Khorassan province in Iran. The climate of the area according to de Martone system is semiarid. The mean annual precipitation is 275 mm and the altitude varies from 931 to 1021 m above sea level. Plants were...

Author(s): Rahimi A. and Atri M.

Predictive modelling of the distribution of two critically endangered Dipterocarp trees: Implications for conservation of riparian forests in Borneo

September 2013

Riparian forests of Malaysian Borneo exhibit high tree species diversity. However, many of the tree species found in these riparian forests are conservation dependant, with their current conservation status (sensu IUCN Red List) varying from vulnerable to critically endangered. The present study had two objectives. Firstly, to identify the environmental factors associated with the distribution of two critically...

Author(s): Minerva Singh

Reproductive aspects of common carp (Cyprinus carpio L, 1758) in a tropical reservoir (Amerti: Ethiopia)

September 2013

The reproductive aspect of common carp (Cyprinus carpio L, 1758) in the Amerti reservoir (9°.63’ N, 37°. 23’ E) was studied monthly between August 2011 and July 2012. A total of 496 specimens, comprising 231 males and 265 females were captured during the sampling period. There were no significant differences between the sex ratio (c2 = 2.33; P= 0.126). The mean ±...

Author(s): Mathewos Hailu

Ecophysiological influences of zeolite and selenium on water deficit stress tolerance in different rapeseed cultivars

September 2013

This experiment was carried out to study the ecophysiological influences of zeolite and selenium on water deficit stress tolerance in different rapeseed cultivars at Karaj, Iran using a factorial-split-plot design with three replications during 2009 - 2010. The main-plot factors included: irrigation regimes (control and irrigation interrupted during the flowering stage), zeolite (non-application and 10 ton/ha)...

Author(s): Sayed Alireza Valadabadi, Amir Hossein Shiranirad and Hossein Aliabadi Farahani

Long-term changes in soil-based ecological services at three sites in Ethiopia

August 2013

Ethiopia faces land degradation as one of its major environmental problems. In response to the degradation, massive land rehabilitation and conservation activities have been undertaken since the mid-1970s. In spite of these efforts, the impacts of long-term land management have not been examined from soil-based ecological services perspective. This study assesses soil-based ecological services over the past 30 years...

Author(s): Abebe Shiferaw, Hans Hurni and Gete Zeleke

Status of the Sondu-Miriu River fish species diversity and fisheries: Sondu-Miriu Hydro-Power Project (SMHPP) operations

August 2013

The Sondu-Miriu Hydroelectric Power Project (SMHPP) is a run-of-the-river hydro-power project on the Sondu-Miriu River, Kenya. The part of the river studied: between the Sondu Bridge upstream, and Osodo Bay on L. Victoria, was divided into three zones; 1. Upstream of the dam, artificial lake approximately 5 km long; 15 – 2 km wide, 2. Depleted section and, 3. Lower section. SMHPP caused part of river below the dam...

Author(s): Dickson Otieno Owiti, Raphael Achola Kapiyo and Esna Kerubo Bosire

Seasonal change effects on phenology of Argania spinosa (L.) in the fields

August 2013

We investigated the relationship between shoot branching, shoot growth, leaf phenology and seasonal changes during three consecutive seasons in three natural populations of Argania spinosa ((L.) Skeels) in south west Morocco. Rainfall showed two peaks in autumn and winter but summer was dry. Locality, climatic season, genotype (tree/locality) and observation date influence...

Author(s): Zahidi A, Bani-Aameur F and EL Mousadik A

Land use and vegetation cover dynamics in and around Kagoma Forest Reserve in Tanzania

August 2013

Kagoma Forest Reserve (KFR) is found in Kagera Region, Tanzania and is comprised of a large area of Miombo woodland. The extent of land use and vegetation cover changes in and around Kagoma Forest Reserve was investigated. Remote sensing and GIS techniques were used to analyze land use and vegetation cover changes over the past 23 years which revealed the occurrence of significant land use and vegetation cover...

Author(s): Nanjiva G. Nzunda, Pantaleo K. T. Munishi, Japhet J. Kashaigili, Geofrey E. Sokaand Joel F. Monjare  

The woodland tree Brachystegia floribunda facilitates the encroachment of forest tree species into miombo woodlands in northern Malawi

August 2013

Although, human activities have caused major losses of tropical forest, there are also reports of forest encroachment and expansion into surrounding sparse vegetation types (savannah and woodland). Large savannah-woodland trees may promote forest encroachment into their surroundings by facilitating seed deposition and subsequent establishment of forest species. This work sought to determine whether large individuals of...

Author(s): Tomohiro Fujita

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