An Assessment of Earthworm Population Density of different Habitat Types in a Mango Cultivation Region of Palakkad District, Western Ghats

2021 ◽  
Vol 9 (4) ◽  
pp. 585-590
Author(s):  
Chandini P K
Keyword(s):  
Population Density ◽  
Western Ghats ◽  
Habitat Types ◽  
Earthworm Population

Influence of cropping on the population of a native earthworm and consequent effects on hydraulic properties of vertisols

Soil Research ◽  
1995 ◽  
Vol 33 (6) ◽  
pp. 995 ◽  
Author(s):  
JJ Friend ◽  
KY Chan
Keyword(s):  
Population Density ◽  
New South ◽  
Soil Surface ◽  
Infiltration Rate ◽  
Shrinkage Cracks ◽  
South Wales ◽  
Natural Pasture ◽  
Earthworm Population ◽  
Moisture Conditions ◽  
Brown Clay

Population density of Heteroporodrilus mediterreus, a large native earthworm found on the Mitchell grassland (Astrebla lappacea) on the Vertisol plains near Walgett, New South Wales, was investigated at two sites (brown and grey clays). Maximum earthworm activity at the soil surface layer was observed during winter (July/August) corresponding to more favourable soil moisture conditions. The highest earthworm population density (7.5 m-2) and biomass (0.89 t ha-1) were detected at the brown clay site under natural pasture. Populations were much lower (by two thirds in the brown clay) and the proportion of immature worms was much higher in the cropped soils than in the pasture soils. Current wheat cropping practices involving long fallowing and excessive cultivation during the period when earthworms are active at the surface are the possible causes of the reduction in population. Disc permeameter measurements compared with infiltration through single earthworm holes showed that the earthworm channels contributed significantly to the movement of water into the subsoil. Their persistence under wet conditions, even after closure of shrinkage cracks, suggests they are also important in maintaining subsoil aeration. Significant reductions in sorptivity and infiltration rate were observed in the cropped soils.

scholarly journals Alarming population status of the Grizzled Giant Squirrel Ratufa macroura (Mammalia: Rodentia: Sciuridae) in Chinnar Wildlife Sanctuary, the Western Ghats, India

2018 ◽  
Vol 10 (10) ◽  
pp. 12350-12356
Author(s):  
Kiran Thomas ◽  
Paingamadathil Ommer Nameer
Keyword(s):  
Population Density ◽  
Western Ghats ◽  
Habitat Restoration ◽  
Population Estimation ◽  
Total Count ◽  
Population Status ◽  
Wildlife Sanctuary ◽  
Southern Western Ghats ◽  
The Western Ghats

This study was carried out to assess the population of Ratufa macroura in Chinnar Wildlife Sanctuary located in the Kerala part of the southern Western Ghats.  The population density of Ratufa macroura was estimated to be 15.26 squirrels/km2.  The total count method, however, gave the population range between 11 to 14 squirrels.  The current population estimation is about 78–85 % lesser than the previous population estimation of the Ratufa macroura carried out in 1993 and 2007 respectively, which is quite alarming.  The following conservation recommendations are suggested for the long-term conservation of R. macroura, which include habitat restoration to maintain the canopy contiguity and regulation of the pilgrimage and the tourism activities in and around the R. macroura habitat.  Urgent steps should also be taken to undertake studies on the genetics of R. macroura.  It is also suggested that systematic and scientific monitoring of the population of R. macroura be undertaken on a regular basis.

Earthworm population density and diversity in different-aged urban systems

2007 ◽  
Vol 37 (1-2) ◽  
pp. 161-168 ◽  
Author(s):  
K.M. Smetak ◽  
J.L. Johnson-Maynard ◽  
J.E. Lloyd
Keyword(s):  
Population Density ◽  
Urban Systems ◽  
Earthworm Population

scholarly journals Characterization of Earthworms (Lumbriscus terestris) Population Under Several Area of Shallots Cultivation

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
M. Anang Firmansyah ◽  
Andy Bhermana
Keyword(s):  
Population Density ◽  
Soil Ph ◽  
Rainy Season ◽  
Land Suitability ◽  
Land Evaluation ◽  
Limiting Factor ◽  
Peat Soils ◽  
Earthworm Population ◽  
Earthworm Populations

Firmansyah MA, Bhermana A. 2020. Characterization of earthworms (Lumbriscus terestris) population under several area of shallots cultivation. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands 9(2): 208-217.In General, the problem of shallot commodities development was still used common farming without considering land suitability and other specific soil condition including aspect cultivation. The objective of this study was to clasify several lands characteristics for shallots cultivation and to observe earthworm (Lumbriscus terrestris) population based on their land suitability classes. The methodology used was land evaluation approach and field observation. This study was performed during  rainy season in 2018 at three locations with different soils, namely, peat soils/Histosol (IST), buried soil of Quartzipsamment above peat soils (ENT), and dry land of Dystropept (EPT). The population of earthworms is obtained by digging up an area of 1 m2 with depth of 20 cm at in four places of location of study. The calculation of earthworms is conducted by hand sorting. The results showed that the highest land suitability class at EPT S3tr, rt, nr, while for other locations are not suitable. The location of IST is classified into N3fb with several limiting such as flooding hazard during rainy season, while for ENT location, classified into Nrt, limiting factor is rough texture. High suitability class is not identical with high earthworm population density. Cultivation aspect that is able to increase soil pH become neutral condition and lower pesticide application affect earthworm populations. ENT locations that have neutral soil pH with lower pesticides applcation have the highest earthworm populations. Earthworm population density from high to low involve ENT> IST> EPT or 74> 33> 31 tails/m2.

Distribution and Density of Haemaphysalis longicornis (Acari: Ixodidae) on Public Lands in Pennsylvania, United States

2020 ◽  
Author(s):  
Keith J Price ◽  
Bryn J Witmier ◽  
Rebecca A Eckert ◽  
Christian N Boyer ◽  
Matt W Helwig ◽  
...  
Keyword(s):  
United States ◽  
Population Structure ◽  
Population Density ◽  
Ixodes Scapularis ◽  
Public Lands ◽  
The United States ◽  
Haemaphysalis Longicornis ◽  
Habitat Types ◽  
Distributional Patterns ◽  
Report Data

Abstract Since the recent introduction of the Asian longhorned tick (Haemaphysalis longicornis Neumann) in the United States, quantitative surveillance information remains lacking, which hinders accurate estimates of population structure and entomological risk. We conducted statewide, active tick surveillance from May to August 2019 and report data on H. longicornis geographical distribution and population density in Pennsylvania. In total, 615 H. longicornis were collected from four counties. Across samples recovering H. longicornis, mean density of H. longicornis was 9.2/100 m2, comparably greater than Ixodes scapularis Say (8.5/100 m2). Density of H. longicornis was also significantly greater in August, largely driven by larvae, and greater in recreational habitat types (12.6/100 m2) and in Bucks County (11.7/100 m2), situated adjacent to the location of the first U.S. discovery of intense infestations. These data are among the first to document H. longicornis from statewide tick surveillance and provide initial measures of population density enabling more quantitative characterizations of distributional patterns.

scholarly journals First record and conservation value of Periophthalmus malaccensis Eggert from Borneo, with ecological notes on other mudskippers (Teleostei: Gobiidae) in Brunei

2016 ◽  
Vol 15 ◽  
Author(s):  
Gianluca Polgar
Keyword(s):  
Population Density ◽  
Coastal Wetlands ◽  
Conservation Status ◽  
First Record ◽  
Conservation Value ◽  
Habitat Types ◽  
Field Surveys ◽  
Brunei Darussalam ◽  
Historical Times ◽  
Intertidal Habitats

The mudskipper Periophthalmus malaccensis is first recorded in Borneo, from two mangrove areas of Brunei Darussalam. The distribution and habitat types where this and other ecologically similar mudskippers (Periophthalmus and Periophthalmodon species) were found in Brunei are also described, from field surveys conducted in Bruneian coastal wetlands from 2013 to 2015. P. malaccensis has a relatively restricted geographic distribution, and probably got extinct in historical times in Singapore. In Brunei, this species occurs at low population density in high intertidal habitats, which are highly impacted by anthropogenic destruction and fragmentation. For these reasons, the conservation status of this species should be evaluated.

scholarly journals EARTHWORM COMMUNITIES (OLIGOCHAETA, LUMBRICIDAE) OF PINE FORESTS AND SMALL FOLIAGE FORESTS IN THE FOREST-STEPPE OB’ REGION

2021 ◽  
Vol 1 (4) ◽  
pp. 1-20
Author(s):  
S.A. Ermolov ◽  
Keyword(s):  
Population Density ◽  
Species Composition ◽  
Chemical Properties ◽  
Pine Forests ◽  
Ecosystem Functions ◽  
Soil Parameters ◽  
Forest Steppe ◽  
Layer By Layer ◽  
Soil Macrofauna ◽  
Earthworm Population

Earthworms form an essential group of soil macrofauna that performs a number of ecosystem functions in forests. Studies of the species composition and population density of earthworms were conducted in many regions of Russia; however, the fauna of Lumbricidae of Novosibirsk area remained unexplored for a long time. The objective of this work is to carry out a comparative analysis of earthworm population in coniferous and small foliage forests of the forest-steppe Ob region (Novosibirsk area) and to identify the correlation between the fauna composition and the basic physical and chemical properties of the soil. The study was conducted in pine forests and birch-aspen forests. The main method of registration was layer-by-layer excavation of soil with hand sorting of soil samples and analysis of forest deadwood. Some soil parameters were also measured. Data of the species composition and population density of earthworms for each habitat are given. The studied habitats were classified according to the ratio of the earthworm living forms. It was found that soil humidity is the most significant factor for the group of epigeiс and epi-endogeiс species. The diversity of epigeiс and epi-endogeiс earthworm species in forests is largely supported by deadwood. The Asian subspecies Eisenia nordenskioldi nordenskioldi was subjected to morphometric analysis confirming its characteristic polymorphism.

scholarly journals Occurrence of mammalian small carnivores in Kalakad-Mundanthurai Tiger Reserve, Western Ghats, India

2021 ◽  
Vol 13 (3) ◽  
pp. 17984-17989
Author(s):  
A. Venkatesh ◽  
N. Sridharan ◽  
S. Agnes Jeya Packiavathi ◽  
K. Muthamizh Selvan
Keyword(s):  
Western Ghats ◽  
Tamil Nadu ◽  
Camera Trap ◽  
Camera Traps ◽  
Habitat Types ◽  
Altitudinal Range ◽  
Tiger Reserve ◽  
Palm Civet ◽  
Prionailurus Bengalensis ◽  
Capture Rates

The small mammalian carnivores are important for maintaining healthy ecosystems.  The present documentation is based on the camera trap survey in Kalakad-Mundanthurai Tiger Reserve, Tamil Nadu.  Paired camera-traps were set in a grid of 1.413 × 1.413 km area of 180km² within an altitudinal range of 80–1,866 m.  A total of 11 species were recorded in different habitat types.  Brown Palm Civet Paradoxurus jerdoni and Leopard Cat Prionailurus bengalensis had the highest capture rates and the lowest was Rusty Spotted Cat Prionailurus rubiginosus.

scholarly journals Earthworm Population Density in Sugarcane Cropping System Applied with Various Quality of Organic Matter

2012 ◽  
Vol 2 (3) ◽  
pp. 103-109 ◽  
Author(s):  
Nurhidayati Nurhidayati ◽  
Endang Arisoesilaningsih ◽  
Didik Suprayogo ◽  
Kurniatun Hairiah
Keyword(s):  
Organic Matter ◽  
Population Density ◽  
Cropping System ◽  
Earthworm Population

Influence of the density of a sika deer population on activity, habitat use, and group size

2000 ◽  
Vol 78 (8) ◽  
pp. 1369-1374 ◽  
Author(s):  
Jakub Borkowski
Keyword(s):  
Population Density ◽  
Habitat Use ◽  
Group Size ◽  
Sika Deer ◽  
Important Determinant ◽  
Cervus Nippon ◽  
High Density ◽  
Habitat Types ◽  
Related Group ◽  
Positive Effect

The influence of population density of sika deer (Cervus nippon) on their activity, habitat use, and habitat-related group size was studied in the area of Japan's Tanzawa Mountains in early winter. The percentage of active sika deer was higher in January 1994 (a low-density period) than in January 1995 (a high-density period). The pattern of habitat use differed between periods. During the high-density period, deer increased their relative use of lower quality habitats. A possible mechanism and implications of this are discussed. Changes in population density had a positive effect on group size in sika deer, though the variation among habitat types supported the hypothesis that food biomass is an important determinant of group size.

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